Dosing Pump Guidance Notes

Dosing Pump Guidance Notes 1 01/10/2003

Dosing Pump Guidance Notes


Contents LMI Dosing Pumps .................................................................................................................................... 3

General Description ................................................................................................................................ 3 Pump Types ............................................................................................................................................ 3 Pump Sizing............................................................................................................................................ 4 For Manual Control ................................................................................................................................ 4 For Water Meter Control ........................................................................................................................ 5 For Automated Dosing (eg Trasar) ......................................................................................................... 5 For Chlorine/Bromine Dosing ................................................................................................................ 5 Liquid Ends/Tubing Materials/Accessories ............................................................................................ 6

Prominent Dosing Pumps ........................................................................................................................... 7 General Description ................................................................................................................................ 7 Pump Types ............................................................................................................................................ 7 SB1 (StSt/PTFE) Explosion Proof Pump Selection Guide ..................................................................... 9 Pump Sizing............................................................................................................................................ 9 For Manual Control .............................................................................................................................. 10 For Water Meter Control ...................................................................................................................... 10 For Automated Dosing (eg Trasar) ....................................................................................................... 11 For Chlorine/Bromine Dosing .............................................................................................................. 11 Liquid Ends/Tubing Materials/Accessories .......................................................................................... 12

Pulsafeeder Dosing Pumps ....................................................................................................................... 13 General Description .............................................................................................................................. 13 Pump Types .......................................................................................................................................... 13 Pump Selection Guide: ......................................................................................................................... 14 Pump Sizing.......................................................................................................................................... 16 For Manual Control .............................................................................................................................. 16 For Water Meter Control ...................................................................................................................... 17 For Automated Dosing (eg Trasar) ....................................................................................................... 17 For Chlorine/Bromine Dosing .............................................................................................................. 17 Liquid Ends/Tubing Materials/Accessories .......................................................................................... 18

Alldos Dosing Pumps ............................................................................................................................... 19 General Description .............................................................................................................................. 19 Pump Types .......................................................................................................................................... 19 Pump Sizing.......................................................................................................................................... 20 For Manual Control .............................................................................................................................. 21 For Water Meter Control ...................................................................................................................... 21 For Automated Dosing (eg Trasar) ....................................................................................................... 21 For Chlorine/Bromine Dosing .............................................................................................................. 22 Liquid Ends/Tubing Materials/Accessories .......................................................................................... 22

Dosing Pump Tubing................................................................................................................................ 24


LMI Dosing Pumps General Description The P1, B1, P5, A9 and B9 dosing pumps are all magnetic impulse diaphragm pumps, which means that an electrical impulse generates one stroke of the pump. The H9 dosing pump is also a magnetic impulse pump but it uses a piston to deliver the high pressure and small flows. Impulses are generated in a number of different ways: 1. Internally by the pump itself by adjustment of the pump speed (1 to 100

pulses/minute – the P12 and P13 pumps have a maximum stroke rate of 60 pulses/minute). The pump can be switched on and off manually (or via the power supply).

2. From an external switch using a control cable (P5, A9, B9 and H9 only). 3. From an impulse water meter or controller with a pulsed output (P5, A9, B9 and H9

only). A9 and H9 pumps can also divide and multiply pulses for added flexibility. 4. From a 4-20mA input (A9, B9 and H9 only). The pump speed at 4mA and 20mA is

programmable. Pump Types P1/B1 Series – manually adjustable speed and stroke (20-100%). This is the basic pump to choose if only manual control is required. P5 Series – manually adjustable speed and stroke. Remote pulse initiation. Remote on/off. Choose this pump if you require remote control or control from a water meter. A9/B9 Series – manually adjustable speed and stroke. LED display. Remote pulse initiation with pulse divide and multiply. 4-20mA Input. Choose this pump if you require flexible control options. H9 Series – control functions are the same as the A9/B9 Series. Choose this pump if you require high pressure and low flow rates.


Pump Selection Guide: Max. pressure (barg) Max. capacity (litre/hour)

3.4/3.5 7.6 9.7/10.3 17.3

0.79 - - P12 - 1.6 - P13 P57

A97 -

2.2 - - - A94 P14 P54

7.6 P16 P56 A96

- - -

17 B13 B93

- - -

Pump Sizing This is particularly important if connection to a water meter is required. Each pump has a maximum output in litres/hour based at full output pressure (output normally increases if injection pressures is lower than the maximum). It is not recommended to run at less than 20% stroke or to set the pump manually to less than 20% speed (except on the A9, B9 or H9 pumps where the pump speed is entered on the LED display). The A9, B9 and H9 pumps provide lots of flexibility if variable outputs are required. Give yourself plenty of capacity both in terms of pump pressure and flow rate. The pump should be able to produce at least 1 barg additional pressure above discharge pressure (including any losses in the four function valve (4FV) and injection valve). It should also be able to produce 50-100% more flow than the maximum calculated. A larger pump running at a lower speed will last much longer than a smaller pump running at full speed. For Manual Control If you have 20 m3/hour of water at 2 barg to treat at 50ppm (assume SG of product is 1.0 and that you have consider the effects of cycling in the tower/boiler) then you will need 20x50/1000 = 1 litre/hour of chemical. Selecting a 1.6 litre/hour pump at 9.7 barg should be sufficient. The pump will have to run at approximately 62% capacity so set at 78% speed and 80% stroke. You could also select at 7.6 litre/hour pump at 13% capacity so set at 32% speed and 40% stroke.


For Water Meter Control If you have 20m3/hr, size your water meter initially. 100 pulses/minute is the maximum pulse rate of the LMI pumps = 6000 pulses/hour. The water meter needs to pulse less than this at full flow. You will need a 2” or 2 ½” water meter depending on the pipe size on site. Selecting a K=10 litres/pulse water meter at 20m3/hr will produce 20x1000/10 = 2000 pulses/hour which is OK. At 50ppm we know that we need 1 litre/hour of chemical. 2000 pulses per hour is 1/3 of the maximum pulses rate of the pump (6000) so we will need a pump capable of 3 litre/hour so that at the lower pulse rate from the water meter it will produce sufficient flow. If we select a 7.6 litre/hour pump then we will need to set the stroke to about 3/7.6 = 40%. If you select a A9 pump then you can multiply or divide the pulses for more flexibility now and in the future should flow rates and dosages change. For Automated Dosing (eg Trasar) All that needs to be done in this case is to make sure that the pump has sufficient capacity to manage the duty required. For the best control results try to make sure that the pump output is not set too high resulting in large overshoots. Also make sure that the pump control functions match the control output of the controller. For instance Trasar 3000 powers the control output at mains voltage so the pump will be switched on and off to control the Trasar level. A P1 pump is therefore satisfactory (but don’t forget to match the P1 pump power supply with the mains power supply to the Trasar 3000). Many controllers provide volt free contacts to control the pump (this means that the pump itself needs to provide the power for the control circuit). In this case you need to choose a P5 or A9 pump which has the remote on/off facility. Some controllers provide pulse or 4-20mA control signals. Choose a P5 or A9 pump for pulse control and an A9 pump for 4-20mA control. For Chlorine/Bromine Dosing The same sizing principal is applied but you need to take into account the natural organic demand of the water as well as the dosage reserve required. It is good practice to over-size the pump and to keep the pump stroke high and lower the pump speed. This normally helps to avoid loss of prime due to gassing of the product.


LMI provide a self-priming valve that fits directly on the liquid end of the pump (before the 4FV). This provides a means to vent the liquid end of any gasses. It also helps to keep a flooded-suction and to avoid UV light on the suction and discharge tubes (best to use double wall tubing – use PTFE inner). Avoid warm plant rooms if possible. If the injection is to a hard water source then scaling can cause a problem. Do not inject the Chlorine/Bromine directly into a pipe (such as a sample return pipe) or below water level in a tank/sump. Ideally dose into the tower sump ABOVE the water level. Control of Chlorine/Bromine using Redox control can be a bit hit and miss particularly if the pH is greater than 8. Redox control of Stabrex is not recommended. It is normally more effective to dose Stabrex proportionally to a water meter, via a timer or linked to a Trasar 3000 controller. Chlorine/Bromine analysers (Iotronics/Hach) can be effective but be very careful with dirty water effecting the sample cell and tubing. Pre-filtration using a basket strainer or spin-down filter is recommended. Liquid Ends/Tubing Materials/Accessories PVDF heads are suitable for virtually all chemicals (also known as Teflon). PP-HV heads are designed for high viscosity products such as Ultimer polymers. The H9 SS head should not be used for high viscosity products (such as ACT). It should only be used on water like products. Also the product must be compatible with Stainless Steel. MDPE tubing is recommended for most products. PTFE tubing is required for oxidising biocides such as Hypochlorite, ClO2 and Stabrex. It should also be used for acids. If high pressure dosing is required (>10barg) then use PTFE tubing. Double wall dosing tubing is always recommended for discharge tubing. This mechanically protects the inner tubing and provides containment should a leak occur. It is also a good idea to fit a sheath of tubing over the pump outlet connection as this is normally where leaks/splits occur. The LMI self-bleed valve should be used with gassing products such as Hypochlorite and Stabrex. The P1, B1, P5, A9 and B9 pumps are all supplied with a 4FV, injection valve, foot-valve, control cable (not P1) and 5m of tubing. The PP-HV head is NOT supplied with a 4FV as this is not suitable for high viscosity products.


The H9 pump is not supplied with any accessories. Prominent Dosing Pumps General Description The Beta4/5a and GammaL dosing pumps are all magnetic impulse diaphragm pumps which means that an electrical impulse generates one stroke of the pump. The Sigma and Vario dosing pumps are motor driven pumps which means that turning of an electrical motor generates one stroke of the pump (see Sigma/Vario data sheets for further technical information). Impulses are generated in a number of different ways: 1. Internally by the pump itself by adjustment of the pump speed (1 to 180

pulses/minute for the Beta4/5a and GammaL pumps – for Sigma & Vario see data sheets). The pump can be switched on and off manually (or via the power supply).

2. From an external switch using a control cable. 3. From an impulse water meter or controller with a pulsed output. GammaL pumps can

also divide and multiply pulses for added flexibility. 4. From a 4-20mA input (GammaL only). The pump speed at 4mA and 20mA is

programmable. Pump Types Beta4/5a – manually adjustable speed and stroke (20-100%). This is the basic pump to choose if only manual control is required, if a water meter pulse input is required or if remote on/off control is required. GammaL – manually adjustable speed and stroke. LED display. Remote pulse initiation with pulse divide and multiply. 4-20mA Input. Choose this pump if you require flexible control options. Sigma – control functions are the same as the GammaL Series, same menu’s and navigation. Choose this pump if you require high flow rates from a 1 ph supply 100-230V 50/60Hz. Vario – control functions are similar to the GammaL Series. Choose this pump if you require high flow rates from a 3 ph 400V supply. Extronic – manually adjustable speed and stroke (20-100%). This is a high spec pump designed for hazardous areas. Power supply 115, 230 & 500V 50/60Hz


NPB9 (Acrylic/Viton) Self Bleed Pump Selection Guide: Pump Models Max Pressure (barg) Max Flow (lit/hour) 4 10 16 0.59 - -

B4A1601 GL1601

1.4 - - B4A1602 GL1602

3.6 - B4A1005 GL1005

-

10.5 - B5A0713 GL0713

-

15.6 B5A0420 GL0420

- -

NPB2 (Acrylic/Viton) Pump Selection Guide: Pump Models Max Pressure (barg) Max Flow (lit/hour) 4 10 16 11 - B5A0713

GL0713 -

17 B5A0420 GL0420

- -

PPE2 (PP/EPDM) Pump Selection Guide: Pump Models

Max Pressure (barg)

Max Flow (lit/hour)

4 7 10 12 16

0.74 - - B4A1000 GL1000

- -

2.1 - - - - B4A1602 GL1602

4.1/4.4 - - B4A1005 GL1005

- B5A1605 GL1605

6.8/7 - B4A0708 GL0708

B5A1008 GL1008

- -

11/12.3 B4A0413 GL0413

B5A0713 GL0713

- - -

17.1 B5A0420 - - - -


TTT (PTFE) Pump Selection Guide: Pump Models Max Pressure (barg) Max Flow (lit/hour) 7 10 16 4.4 - B4A1005

GL1005 -

11 B5A0713 GL0713

- -

PVT (PVDF/PTFE) Pump Selection Guide: Pump Models Max Pressure (barg) Max Flow (lit/hour) 4 7 10 12 16

3.6/3.8 - - B4A1005

GL1005 - B5A1605

GL1605 6.2/6.4 - B4A0708

GL0708 B5A1008 GL1008

- -

10.9/11.0 B4A0413 GL0413

B5A0713 GL0713

- - -

16.5/16.6/17 B5A0420 GL0420

- V-12017 S1-12017 -

26.2/35 - - V-12026 S1-12035 - 42/50 - - V-12042

S1-12050 - -

65 - S1-07065 - - - SB1 (StSt/PTFE) Explosion Proof Pump Selection Guide Pump Models Max Pressure (barg) Max Flow (lit/hour) 10 13 25 2.0 EXBa-2502 4.2 EXBa-2505 6.0 EXBa-1006 10.5 EXBa-1310 Pump Sizing This is particularly important if connection to a water meter is required. Each pump has a maximum output in litres/hour based at full output pressure (output normally increases if injection pressures is lower than the maximum). It is not recommended to run at less than 20% stroke or to set the pump manually to less than 20% speed (except on the GammaL or Sigma pumps where the pump speed is entered on the LED display).


The GammaL pumps provide lots of flexibility if variable outputs are required. Give yourself plenty of capacity both in terms of pump pressure and flow rate. The pump should be able to produce at least 1 barg additional pressure above discharge pressure (including any losses in the multi-function valve (MFV) and injection valve). It should also be able to produce 50-100% more flow than the maximum calculated. A larger pump running at a lower speed will last much longer than a smaller pump running at full speed. For Manual Control If you have 20 m3/hour of water at 8 barg to treat at 50ppm (assume SG of product is 1.0 and that you have considered the effects of cycling in the tower/boiler) then you will need 20x50/1000 = 1 litre/hour of chemical. Selecting a 2.1 litre/hour pump at 16 barg should be sufficient. The pump will have to run at approximately 50% capacity so set at 66% speed and 75% stroke. You could also select at 4.1 litre/hour pump at 25% capacity so set at 50% speed and 50% stroke. For Water Meter Control If you have 20m3/hr, size your water meter initially. 180 pulses/minute is the maximum pulse rate of the Prominent pumps = 10800 pulses/hour. The water meter needs to pulse less than this at full flow. You will need a 2” or 2 ½” water meter. Selecting a K=5 litres/pulse water meter at 20m3/hr will produce 20x1000/5 = 4000 pulses/hour which is OK. At 50ppm we know that we need 1 litre/hour of chemical. 4000 pulses per hour is about 1/3 of the maximum pulses rate of the pump (10800) so we will need a pump capable of 3 litre/hour so that at the lower pulse rate from the water meter it will produce sufficient flow. If we select a 4.4 litre/hour pump then we will need to set the stroke to about 3 / 4.4 = 68%. If you select a GammaL pump then you can multiply or divide the pulses for more flexibility now and in the future should flow rates and dosages change.


For Automated Dosing (eg Trasar) All that needs to be done in this case is to make sure that the pump has sufficient capacity to manage the duty required. For the best control results try to make sure that the pump output is not set too high resulting in large overshoots. Also make sure that the pump control functions match the control output of the controller. For instance Trasar 3000 powers the control output at mains voltage so the pump will be switched on and off to control the Trasar level. A Beta4/5a pump is therefore satisfactory. Many controllers provide pulse free contacts to control the pump (this means that the pump itself needs to provide the power for the control circuit). In this case you can use either a Beta4/5a or GammaL pump which have the remote on/off facility. Some controllers provide pulse or 4-20mA control signals. Choose a Beta4/5a or GammaL pump for pulse control and an GammaL pump for 4-20mA control. For Chlorine/Bromine Dosing The same sizing principal is applied but you need to take into account the natural organic demand of the water as well as the dosage reserve required. It is good practice to over-size the pump and to keep the pump stroke high and lower the pump speed. This normally helps to avoid loss of prime due to gassing of the product. Prominent provide a self-priming liquid end called a NPB9. This provides a means to vent the liquid end of any gasses. It also helps to keep a flooded-suction and to avoid UV light on the suction and discharge tubes (best to use double wall tubing – use PTFE inner). Avoid warm plant rooms is possible. If the injection is to a hard water source then scaling can cause a problem. Do not inject the Chlorine/Bromine directly into a pipe (such as a sample return pipe) or below water level in a tank/sump. Ideally dose into the tower sump ABOVE the water level. Control of Chlorine/Bromine using Redox control can be a bit hit and miss particularly if the pH is greater than 8. Redox control of Stabrex is not recommended. It is normally more effective to dose Stabrex proportionally to a water meter, via a timer or linked to a Trasar 3000 controller. Chlorine/Bromine analysers (Iotronics) can be effective but be very careful with dirty water effecting the sample cell and tubing. Pre-filtration using a basket strainer of spin-down filter is recommended.


Liquid Ends/Tubing Materials/Accessories PPE2 heads are suitable for most chemicals. NPB2 heads are suitable for virtually all chemicals including oxidising biocides. You will have to use this one if you cannot bleed back the NPB9 head for an oxidising biocide NPB9 heads provide self-bleeding for gassing products such as oxidising biocides. TTT heads provide excellent chemical compatibility and should be used for acids. PVT heads are designed for high viscosity products such as Ultimer polymers MDPE tubing is recommended for most products. PTFE tubing is required for oxidising biocides such as Hypochlorite, ClO2 and Stabrex. It should also be used for acids. If high pressure dosing is required (>10barg) then use PTFE tubing. Double wall dosing tubing is always recommended for discharge tubing. This mechanically protects the inner tubing and provides containment should a leak occur. It is also a good idea to fit a sheath of tubing over the pump outlet connection as this is normally where leaks/splits occur. The Beta4/5a and GammaL pumps are all supplied with injection valve, foot-valve, control cable and 5m of tubing.


Pulsafeeder Dosing Pumps General Description The Pulsafeeder dosing pumps are all magnetic impulse diaphragm pumps which means that an electrical impulse generates one stroke of the pump. Impulses are generated in a number of different ways: 1. Internally by the pump itself by adjustment of the pump speed (12 to 125

pulses/minute). The pump can be switched on and off manually (or via the power supply).

2. From an external switch using a control cable (MP and E+ only) 3. From an impulse water meter or controller with a pulsed output (MP, E+ & C+ Ext

only). MP pumps can also divide and multiply pulses for added flexibility. 4. From a 4-20mA input (MP only). Pump Types C+ - manually adjustable speed and stroke (30-100%). This is the basic pump to choose if only manual control is required C+Ext - manually adjustable speed and stroke (30-100%). This is the basic pump to choose if only manual control is required or if a water meter pulse input is required E - manually adjustable speed and stroke (30-100%). This is the basic pump to choose if only manual control is required E+ – manually adjustable speed and stroke (30-100%). This is the basic pump to choose if only manual control is required, if a water meter pulse input is required or if remote on/off control is required. MP – manually adjustable speed and stroke. LED display. Remote pulse initiation with pulse divide and multiply. 4-20mA Input. Choose this pump if you require flexible control options. ET – water meter controlled with a number of water meter count to pump time options. Water meter pulse repeater. Choose this pump if you want a lot of flexibility in terms of dosage rate to water meter inputs and/or you want to relay divide water meter pulses between more than one pump CL – a conductivity probe enables control of a cooling tower purge from the pump and also “feed and bleed” inhibitor control


CW – a conductivity probe enables control of a cooling tower purge from the pump and also a water meter input allows proportional inhibitor feed WT – two independent counters control a purge valve and the inhibitor pump T7 – includes a 7-day timer Pump Selection Guide: A tabular selection guide is not very easy for the Pulsafeeder range due to the large variations in flow rate and discharge pressures. Please select the best pump for your duty from the catalogue. Pump Selection Guide MP Pumps: Pump Models

Max Pressure (barg)

Max Flow (lit/hour)

7 10 17

0.79 - - 992-450252 3.29 - 992-450254 - 14.83 992-450255 - - Pump Selection Guide E+ Pumps: Pump Models

Max Pressure (barg)

Max Flow (lit/hour)

1.3 7 10

1.71 - - 992-450031 992-450032

3.79 - 992-450141 992-450142

-

14.83 - 992-450021 992-450021

-

78.85 992-450149 992-450150

- -


Pump Selection Guide E Pumps: Pump Models

Max Pressure (barg)

Max Flow (lit/hour)

1.3 7 10

1.88 - - 992-450063 992-450064

3.78 - - 992-450065 992-450066

6.92 - 992-450160 992-450161

-

Pump Selection Guide C+ Pumps: Pump Models

Max Pressure (barg)

Max Flow (lit/hour)

1.3 5.6 10

1.82 - 992-450011 992-450012 992-450212 (Ext)

-

4.73 - 992-450001 992-450002 992-450202 (Ext)

-

Pump Selection Guide ET Pumps: Pump Models

Max Pressure (barg)

Max Flow (lit/hour)

2.4 7 17

3.15 - - 992-449940 992-449941

3.78 - 992-449942 992-449943

-

37.85 992-449944 992-449945

- -


Pump Selection Guide CL/CW/WT Pumps: Pump Models

Max Pressure (barg)

Max Flow (lit/hour)

7 10 17

1.89 - 992-449923 (CL) 992-449933 (WT)

-

5.04 992-449927 (CL) 992-449918 (CW) 992-449937 (WT)

- -

Pump Selection Guide T7 Pumps: Pump Models

Max Pressure (barg)

Max Flow (lit/hour)

2.4 7 17

4.73 - 992-449905 - 6.94 - 992-449907 - Pump Sizing This is particularly important if connection to a water meter is required. Each pump has a maximum output in litres/hour based at full output pressure (output normally increases if injection pressures is lower than the maximum). It is not recommended to run at less than 30% stroke or to set the pump manually to less than 20% speed (except on the MP pumps where the pump speed is entered on the LED display). The MP pumps provide lots of flexibility if variable outputs are required. Give yourself plenty of capacity both in terms of pump pressure and flow rate. The pump should be able to produce at least 1 barg additional pressure above discharge pressure (including any losses in the 5 way valve (5WV) and injection valve). It should also be able to produce 50-100% more flow than the maximum calculated. A larger pump running at a lower speed will last much longer than a smaller pump running at full speed. For Manual Control If you have 20 m3/hour of water at 8 barg to treat at 50ppm (assume SG of product is 1.0 and that you have considered the effects of cycling in the tower/boiler) then you will need 20x50/1000 = 1 litre/hour of chemical. Selecting a 1.71 litre/hour pump at 10 barg should be sufficient. The pump will have to run at approximately 62% capacity so set at 78% speed and 80% stroke.


You could also select a 3.79 litre/hour pump at 45% capacity so set at 50% speed and 90% stroke. For Water Meter Control If you have 20m3/hr, size your water meter initially. 125 pulses/minute is the maximum pulse rate of the Prominent pumps = 7500 pulses/hour. The water meter needs to pulse less than this at full flow. You will need a 2” or 2 ½” water meter. Selecting a K=5 litres/pulse water meter at 20m3/hr will produce 20x1000/5 = 4000 pulses/hour which is OK. At 50ppm we know that we need 1 litre/hour of chemical. 4000 pulses per hour is about 1/2 of the maximum pulses rate of the pump (7500) so we will need a pump capable of 2 litre/hour so that at the lower pulse rate from the water meter it will produce sufficient flow. If we select a 3.79 litre/hour pump then we will need to set the stroke to about 2/3.79 = 53%. If you select a MP pump then you can multiply or divide the pulses for more flexibility now and in the future should flow rates and dosages change. For Automated Dosing (eg Trasar) All that needs to be done in this case is to make sure that the pump has sufficient capacity to manage the duty required. For the best control results try to make sure that the pump output is not set too high resulting in large overshoots. Also make sure that the pump control functions match the control output of the controller. For instance Trasar 3000 powers the control output at mains voltage so the pump will be switched on and off to control the Trasar level. A C+ or E pump is therefore satisfactory. Many controllers provide pulse free contacts to control the pump (this means that the pump itself needs to provide the power for the control circuit). In this case you can use either a MP or E+ pump which have the remote on/off facility. Some controllers provide pulse or 4-20mA control signals. Choose a E+ or MP pump for pulse control and a MP pump for 4-20mA control. For Chlorine/Bromine Dosing The same sizing principal is applied but you need to take into account the natural organic demand of the water as well as the dosage reserve required. It is good practice to over-size the pump and to keep the pump stroke high and lower the pump speed. This normally helps to avoid loss of prime due to gassing of the product.


Pulsafeeder provide a 5 function degas valve. This provides a means to vent the liquid end of any gasses. It also helps to keep a flooded-suction and to avoid UV light on the suction and discharge tubes (best to use double wall tubing – use PTFE inner). Avoid warm plant rooms is possible. If the injection is to a hard water source then scaling can cause a problem. Do not inject the Chlorine/Bromine directly into a pipe (such as a sample return pipe) or below water level in a tank/sump. Ideally dose into the tower sump ABOVE the water level. Control of Chlorine/Bromine using Redox control can be a bit hit and miss particularly if the pH is greater than 8. Redox control of Stabrex is not recommended. It is normally more effective to dose Stabrex proportionally to a water meter, via a timer or linked to a Trasar 3000 controller. Chlorine/Bromine analysers (Iotronics/Hach) can be effective but be very careful with dirty water effecting the sample cell and tubing. Pre-filtration using a basket strainer of spin-down filter is recommended. Liquid Ends/Tubing Materials/Accessories Pulsafeeder pumps are normally supplied with PVC liquid ends which is suitable for most chemicals (not acids!). MDPE tubing is recommended for most products. PTFE tubing is required for oxidising biocides such as Hypochlorite, ClO2 and Stabrex. It should also be used for acids. If high pressure dosing is required (>10barg) then use PTFE tubing. Double wall dosing tubing is always recommended for discharge tubing. This mechanically protects the inner tubing and provides containment should a leak occur. It is also a good idea to fit a sheath of tubing over the pump outlet connection as this is normally where leaks/splits occur. The Pulsafeeder pumps are all supplied with an injection valve, foot-valve, control cable and 5m of tubing.


Alldos Dosing Pumps General Description The Primus 208 and 221 dosing pumps are all reciprocating positive displacement diaphragm pumps which means that a motor/cam is used to make one stroke of the pump. As electrical impulses are not used the delivery of these pumps is very smooth in comparison to a magnetic pump which potentially has a number of advantages in terms of chemical addition control and pump life. Pump strokes are generated in a number of different ways: 1. Internally by the pump itself by adjustment of the pump speed (1 to 120

strokes/minute – 63 strokes/minute for the 221-14). The pump can be switched on and off manually (or via the power supply).

2. From an external switch using a control cable (Etron or Etron Profi). 3. From an impulse water meter or controller with a pulsed output (Etron or Etron

Profi). 4. From a 4-20mA input (Etron). The pump speed at 4mA and 20mA is programmable. Pump Types 208 Standard – manually adjustable stroke (10-100%). This is the basic pump to choose if only manual control is required. 208 Etron – manually adjustable speed and stroke. Remote pulse initiation. Remote on/off. Choose this pump if you require remote control or control from a water meter. 208 Etron Profi – manually adjustable speed and stroke. LED display. Remote pulse initiation with pulse divide and multiply. Remote on/off. 4-20mA Input. Choose this pump if you require flexible control options. 208 Plus 3 – The Plus 3 features a double diaphragm design with integral calibration, making it ideally suitable for very low dose rates and gassing products like Hypochlorite. Control can be selected from one of the following options, Standard, Etron & Etron Profi 221 Standard – manually adjustable stroke (10-100%). This is the basic pump to choose if only manual control is required with a larger flow rate 221 Etron Profi – manually adjustable speed and stroke. LED display. Remote pulse initiation with pulse divide and multiply. Remote on/off. 4-20mA Input. Choose this pump if you require flexible control options with a larger flow rate


Primus 208 (PVC/Ceramic/Viton) Pump Selection Guide: Pump Models

Max Pressure (barg)

Max Flow (lit/hour)

4 8 10 16

1.0 - - - M208-1 Plus3 M208-1

3.0 - - M208-3 Plus3 M208-3

-

6.0 - M208-6 Plus3 M208-6

- -

14.0 M208-14 - - - Primus 221 Pump Selection Guide: Pump Models

Max Pressure (barg)

Max Flow (lit/hour)

4 8 10 16

14 - - M221-14 - 27 - - M221-27 - Pump Sizing This is particularly important if connection to a water meter is required. Each pump has a maximum output in litres/hour based at full output pressure (output normally increases if injection pressures is lower than the maximum). It is not recommended to run at less than 20% stroke or to set the pump manually to less than 20% speed (except on the Etron Profi where the pump speed is entered on the LED display). The Etron Profi pumps provide lots of flexibility if variable outputs are required. Give yourself plenty of capacity both in terms of pump pressure and flow rate. The pump should be able to produce at least 1 barg additional pressure above discharge pressure (including any losses in the injection valve). It should also be able to produce 50-100% more flow than the maximum calculated. A larger pump running at a lower speed will last much longer than a smaller pump running at full speed.


For Manual Control If you have 20 m3/hour of water at 2 barg to treat at 50ppm (assume SG of product is 1.0 and that you have considered the effects of cycling in the tower/boiler) then you will need 20x50/1000 = 1 litre/hour of chemical. Selecting a 3.0 litre/hour pump at 10 barg should be sufficient. The pump will have to run at approximately 33% capacity so set at about 50% speed and 60% stroke. For Water Meter Control If you have 20m3/hr, size your water meter initially. 120 pulses/minute is the maximum pulse rate of the Alldos pumps = 7200 pulses/hour (63 for the M221 Standard). The water meter needs to pulse less than this at full flow. You will need a 2” or 2 ½” water meter depending on the pipe size on site. Selecting a K=10 litres/pulse water meter at 20m3/hr will produce 20x1000/10 = 2000 pulses/hour which is OK. At 50ppm we know that we need 1 litre/hour of chemical. 2000 pulses per hour is 30% of the maximum pulses rate of the pump (7200) so we will need a pump capable of 3.3 litre/hour so that at the lower pulse rate from the water meter it will produce sufficient flow. If we select a 6.0 litre/hour pump then we will need to set the stroke to about 3.3/6.0 = 50-60%. If you select a Etron Profi pump then you can multiply or divide the pulses for more flexibility now and in the future should flow rates and dosages change. For Automated Dosing (eg Trasar) All that needs to be done in this case is to make sure that the pump has sufficient capacity to manage the duty required. For the best control results try to make sure that the pump output is not set too high resulting in large overshoots. Also make sure that the pump control functions match the control output of the controller. For instance Trasar 3000 powers the control output at mains voltage so the pump will be switched on and off to control the Trasar level. A M208 Standard pump is therefore satisfactory (but don’t forget to match the pump power supply with the mains power supply to the Trasar 3000). Many controllers provide volt free contacts to control the pump (this means that the pump itself needs to provide the power for the control circuit). In this case you need to choose a Etron or Etron Profi pump which has the remote on/off facility.


Some controllers provide pulse or 4-20mA control signals. Choose a Etron or Etron Profi pump for pulse control and a Etron Profi pump for 4-20mA control. For Chlorine/Bromine Dosing The same sizing principal is applied but you need to take into account the natural organic demand of the water as well as the dosage reserve required. It is good practice to over-size the pump and to keep the pump stroke high and lower the pump speed. This normally helps to avoid loss of prime due to gassing of the product. Alldos provide a standard Degas head head. This provides a means to vent the liquid end of any gasses. Alldos also provide a double diaphragm Degas head that provides additional degas benefits for particularly difficult applications. It also helps to keep a flooded-suction and to avoid UV light on the suction and discharge tubes (best to use double wall tubing – use PTFE inner). Avoid warm plant rooms if possible. If the injection is to a hard water source then scaling can cause a problem. Do not inject the Chlorine/Bromine directly into a pipe (such as a sample return pipe) or below water level in a tank/sump. Ideally dose into the tower sump ABOVE the water level. Control of Chlorine/Bromine using Redox control can be a bit hit and miss particularly if the pH is greater than 8. Redox control of Stabrex is not recommended. It is normally more effective to dose Stabrex proportionally to a water meter, via a timer or linked to a Trasar 3000 controller. Chlorine/Bromine analysers (Iotronics/Hach) can be effective but be very careful with dirty water effecting the sample cell and tubing. Pre-filtration using a basket strainer or spin-down filter is recommended. Liquid Ends/Tubing Materials/Accessories PP/Viton heads are suitable for most chemicals PVC/Viton degas heads are designed for gassing products PVDF/EPDM heads are suitable for virtually chemicals (including acids) The “Plus 3” double diaphragm heads are designed for low output dosing of volatile liquids like Hypochlorite MDPE tubing is recommended for most products. PTFE tubing is required for oxidising biocides such as Hypochlorite, ClO2 and Stabrex. It should also be used for acids. If high pressure dosing is required (>10barg) then use PTFE tubing.


Double wall dosing tubing is always recommended for discharge tubing. This mechanically protects the inner tubing and provides containment should a leak occur. It is also a good idea to fit a sheath of tubing over the pump outlet connection as this is normally where leaks/splits occur. The Alldos pumps are all supplied with an injection valve and tubing (control cable not supplied).


Dosing Pump Tubing The following information should help to guide you through the selection of suitable dosing tubing for the LMI, Prominent, Pulsafeeder and Alldos dosing pump ranges. Not all of the tubing is available from Applied Services as standard. If you require any tubing that is not on the list then please contact your local Applied Services Engineer for assistance. Single wall tubing is available in either MDPE (Medium Density Polyethylene) or PTFE (Poly-tetra Fluoroethylene). PTFE is a flexible form of a very highly resistant material very similar to PVDF and Teflon. Tubing size is specified by a number followed by a “x” followed by another number: For instance: 6 x 4mm This means that the inner diameter of the tube is 4mm and the outer diameter is 6mm. For instance: 3/8” x ¼” This means that the inner diameter of the tube is ¼ inch (6.35mm) and the outer diameter is 3/8 inch (9.5mm). Tubing is available in 6 standard sizes designed by the letters A to F. Single wall tubing is available in lengths of 10m, 30m, 50m or 100m. If you require any lengths longer than this then contact your Applied Services Engineer. PTFE has better chemical compatibility and also a better pressure rating. Double wall tubing is also available in either MDPE or PTFE and is specified in the same way as the single wall tubing. Double wall tubing is delivered with the inner tubing (MDPE or PTFE) installed inside an outer tube of ¾” (19mm) outside diameter LDPE (Low Density Polyethylene). Double wall tubing is available in 10m, 30m, 50m and 100m lengths. Longer lengths are also possible so please contact your local Applied Services Engineer if you require longer lengths.


Alldos Pumps Tubing Size M208 - 1, 3, 6 6x4mm (Size “C”) M208 - 14, M221 12x6mm (993-526-022) LMI Pumps Tubing Size P12, P14, P57, A97, A94 6x4mm (Size “C”) P13, P16, B13, P54, P56, A96, B93 8x6mm (Size “E”) All HV heads Suction 12x9mm (Size “F”)

Discharge 23x15mm (951-70122-25M) Prominent Pumps Tubing Size 1000, 1601, 1602 6x4mm (Size “C”) 1005, 1605, 0708, 1008, 0713, 0413 8x5mm (Size “D”) 0420, Sigma & Vario 12x9mm (Size “F”) Pulsafeeder Pumps Tubing Size All pumps except those listed below 3/8"x1/4” (Size “A”) MP 14.83l/hr, E+ 14.82l/hr, 1/2"x3/8” (Size “B”) E+ 78.85l/hr 1/2"x3/4" (Contact ASE Engineer) A selection of reinforced PVC tubing in various sizes is also available. This is suitable for sample water and chemicals that are normally compatible with PVC. Always check the compatibility of the chemical with the tubing materials. If in doubt contact your local Applied Services Engineer.

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Dosing Pump Guidance Notes