DAV - WPWastewater Air Valves

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18

DAV Series

Edition 11/2018

2

DAV-WP General

2

Dorot, part of Matholding Group since 2014, is one of the world’s leading manufacturers and developers

of sustainable technologies and products for water control and optimization systems.

With more than 70 years of experience, the company is a worldwide pioneer

in providing high quality solutions for Hydraulic Controlled Valves and Air Valves.

Customers around the globe benefit on a daily basis from our experience and wide variety of solutions and services in the following areas:

Waterworks Distribution Systems for civil and industrial engineering Fire Protection Industrial Applications such as Mining,

Wastewater, Marine Water Treatment and Filtration

Agricultural and Landscape Irrigation Water Metering and others

Innovation and expertise are the backbones of Dorot. It drove us into developing a

diverse portfolio of water and other fluids systems application, in compliance with

specifications and international quality standards. Customer satisfaction and recognition is of paramount importance for Dorot. This guarantees uncompromised know-how, expertise and professionalism in planning, designing and providing the optimal hydraulic control solutions.

We invite you to join our family of business partners.Together we can provide the best control solutions for

the world’s most valuable natural resource: water

DAV Series

Edition 11/2018

3

DAV-WP General

DAV-WPWastewater Air Valves

The DAV-WP valve has been designed for efficient discharge and intake of air from pressurized sewage systems where confined air (gases) could impair the system’s operation.The valve’s conical elongated body design minimizes the possibility of suspended solids or greases / oils clogging the orifice or causing the mechanism to foul up and stick.For ease of maintenance, the DAV-WP is equipped with a 1” drain valve to allow periodic flushing of sediments, grease and solids.

Operation• Discharge of air at high flow velocity during the

initial filling of the network.• Introducing large quantities of air into the system

when the pipe drains, maintaining atmospheric pressures in the pipeline and preventing collapse and cavitation damage to the conduits.

• Relieving entrapped air (gases) from the pipeline while the network is at normal working pressure.

Principle of operation

Dissolved air is accumulatedin the valve, released when

the float drops down.

Air and Vacuum (Kinetic)Automatic Closed

Pipeline is aerated. Pipeline is full of water.

Automatic

Dissolved gas is accumulated in the valve, released when

the float drops

Air and Vacuum (Kinetic) Closed

Pipeline is aerated Pipeline is full of liquid

DAV Series

Edition 11/2018

4

DAV-WP Technical Data

H

ØW

ØD

E

12

3

4

5

6

7

8

9

10

11

Performance:

Dimensions & Weights

Valve 2” / 50 mm threaded

2” / 50 mm flanged

3” / 75 mm flanged

4” / 100 mm flanged

6” / 150 mm flanged

Dimension SI US SI US SI US SI US SI US

H - Height 710 mm 257/8" 657 mm 257/8" 657 mm 257/8" 657 mm 257/8" 657 mm 257/8"

W - Width 245 mm 95/8" 245 mm 95/8" 245 mm 95/8" 245 mm 95/8" 245 mm 95/8"

D - Thread/flange --- --- 165 mm 61/2" 200 mm 77/8" 220 mm 83/4" 280 mm 11”

A - Aut. Nozzle Area 12.85 mm2 0.02 in2 12.85 mm2 0.02 in2 12.85 mm2 0.02 in2 12.85 mm2 0.02 in2 12.85 mm2 0.02 in2

K - Kinetic Nozzle Area 855 mm2 1.33 in2 855 mm2 1.33 in2 855 mm2 1.33 in2 855 mm2 1.33 in2 855 mm2 1.33 in2

E - Drainage Diameter (BSP/NPT) 11/2" 11/2" 11/2" 11/2" 11/2" 11/2" 11/2" 11/2" 11/2" 11/2"

Weight 12.5 kg 27.5 lbs. 12.2 kg 26.9 lbs. 15 kg 33 lbs. 18 kg 39.7 lbs. 22 kg 48.5 lbs.

End Connections• Available in BS/ISO/ANSI standards flange,

Sizes: 2” (50mm) - 6” (150mm) • The 2” (50mm) valve available with a threaded BSP

or NPT connection.

Operating Pressure-Range0.2 - 16 bar (3 - 250 psi)

Components

No. Description Material1 Bonnet elbow PP2 Bonnet GRP3 Seals EPDM4 Top Float Foam PP5 Spring SS3026 Main Float Sub. Assy. SS3167 Body ST-37* or 316SS8 Bolt SS3169 Adapter flange PA10 O Ring NBR11 O Ring NBR

* Three layer, UV protected epoxy coating

Inflow Data (free air flow)

Flow rate (CFM)

Lin

e p

ress

ure

(p

si)

Line p

ressure (m

eter)

Flow rate (M3/h)

Results summary

.5" No slam up to 9 meter 1/2" 3/4" 1"Pressure 0 0.5 1.1 3 4 6 9 0 0 0

Flow 0 10 25 32 37 42 49 1/2" 3/4" 1" -10 -0.2 -0.177 -0.273Pin 0 0.2 1.2 3 4.6 6 9.4 0 0 0 -20 -0.762 -0.574 -0.766K 0.29 0.23 0.22 0.21 0.2 10 0.177 0.273 -30 -2.403 -1.191 -1.479

K average 0.23 20 0.762 0.574 0.766 -40 -5.284 -2.028 -2.41230 2.403 1.191 1.479 -50 -9.705 -3.085 -3.56540 5.284 2.028 2.412 -60 -15.966 -4.362 -4.93850 9.705 3.085 3.565 -70 -24.367 -5.859 -6.53160 15.966 4.362 4.938 -80 -35.208 -7.576 -8.34470 24.367 5.859 6.53180 35.208 7.576 8.344

3/4" No slam up to 9 meterPressure 0 1 2 4 6 7 2"

Flow 0 29 44 57 70 76 0 0

Pin 0 1 2.53 4.17 5.9 7 10 -0.017

K 0 0.36 0.34 0.35 0.36 0.36 20 -0.018

K average 5.69 30 -0.003

40 0.028

50 0.075

100 0.55 2"200 2.7 0 0300 6.45 -10 -0.033400 11.8 -20 -0.082

1" No slam up to 9 meter -30 -0.147Pressure 0 1.25 2.7 4.2 6.2 8.5 -40 -0.228

Flow 0 30 43 53 67 81 -50 -0.325Pin 0 1.25 2.73 4.2 6.2 8.5 -100 -1.05K 0 0.3 0.28 0.28 0.29 0.3 -200 -3.7

K average 67 -300 -7.95

2" No slam up to 9 meterPressure 0 1 3 5 7 9.7

Flow 0 143 207 260 307 365Pin 0 1 3 5 7 9.7K 0 0.38 0.32 0.32 0.32 0.32

K average #DIV/0!

automatic 1/2"-2"0 1 2 3 4 5 6 7 8 0 00 11 16 21 27 32 37 43 48 10 1.259

20 2.73830 4.43740 6.35650 8.49560 10.854

y = 0.0011x2 + 0.0163x

02468

10

0 20 40 60 80 100

Lin

e p

ress

ure

[m

ete

r]

Outflow M^3/h

DAV-P-1-k/KA

y = 0.0011x2 + 0.0067x

02468

10

0 20 40 60 80

Lin

e p

ress

ure

[m

ete

r]

Outflow M^3/h

DAV-P-3/4-K/KA

y = 5E-05x3 + 0.0017x2 - 0.0159x

02468

10

0 20 40 60

Lin

e p

ress

ure

[m

ete

r]

Outflow M^3/h

DAV-P-1/2-K/KA

y = 0.0011x2 + 0.1149x

0

2

4

6

8

0 10 20 30 40 50

Lin

e p

ress

ure

[m

ete

r]

Flow rate [M^3/h]

Discharge data (Free air flow) Small Nozzle 1/2"-2"

0

1

2

3

4

5

6

7

8

9

10

0 10 20 30 40 50 60 70 80

Lin

e p

ressu

re [

me

ter]

Flow rate [m^3/h]

Discharge Data (free air flow) 1/2", 3/4", 1"

1/2"

3/4"

1"

0

1

2

3

4

5

6

7

8

9

10

0 50 100 150 200 250 300 350

Lin

e p

ressu

re [

me

ter]

Flow rate [m^3/h

Discharge Data (free air flow) 2"

y = 8E-05x2 - 0.0025x

02468

1012

0 100 200 300 400

Lin

e p

ress

ure

[m

ete

r]

Outflow M^3/h

DAV-P-2-k/KA

-6

-5

-4

-3

-2

-1

0

-75 -65 -55 -45 -35 -25 -15 -5

Lin

e p

ressu

re [

PS

I]

Flow rate [m^3/h]

Inflow Data (free air flow) 1/2", 3/4", 1"

1/2"

3/4"

1"

0

2

4

6

8

0 10 20 30 40 50

Lin

e p

ress

ure

[b

ar]

Flow rate [m^3/h]

Discharge data (Free air flow) Small Nozzle 1/2", 3/4", 1", 2"

-6.00

-5.00

-4.00

-3.00

-2.00

-1.00

0.00

-260 -210 -160 -110 -60 -10

Lin

e p

ressu

re [

PS

I]

Flow rate [m^3/h]

Inflow Data (free air flow) 2"

-260 -210 -160 -110 -60 -10

0

-1

-2

-3

-4

-5

-6

-2

-4

-6

-8

-150 -130 -110 -90 -70 -50 -30 -10

Discharge data (free air flow)

Flow rate (CFM)

Lin

e p

ress

ure

(m

eter

) Line p

ressure (p

si)

Flow rate (M3/h)

Results summary

.5" No slam up to 9 meter 1/2" 3/4" 1"Pressure 0 0.5 1.1 3 4 6 9 0 0 0

Flow 0 10 25 32 37 42 49 1/2" 3/4" 1" -10 -0.2 -0.177 -0.273Pin 0 0.2 1.2 3 4.6 6 9.4 0 0 0 -20 -0.762 -0.574 -0.766K 0.29 0.23 0.22 0.21 0.2 10 0.177 0.273 -30 -2.403 -1.191 -1.479

K average 0.23 20 0.762 0.574 0.766 -40 -5.284 -2.028 -2.41230 2.403 1.191 1.479 -50 -9.705 -3.085 -3.56540 5.284 2.028 2.412 -60 -15.966 -4.362 -4.93850 9.705 3.085 3.565 -70 -24.367 -5.859 -6.53160 15.966 4.362 4.938 -80 -35.208 -7.576 -8.34470 24.367 5.859 6.53180 35.208 7.576 8.344

3/4" No slam up to 9 meterPressure 0 1 2 4 6 7 2"

Flow 0 29 44 57 70 76 0 0

Pin 0 1 2.53 4.17 5.9 7 10 -0.017

K 0 0.36 0.34 0.35 0.36 0.36 20 -0.018

K average 5.69 30 -0.003

40 0.028

50 0.075

100 0.55 2"200 2.7 0 0300 6.45 -10 -0.033400 11.8 -20 -0.082

1" No slam up to 9 meter -30 -0.147Pressure 0 1.25 2.7 4.2 6.2 8.5 -40 -0.228

Flow 0 30 43 53 67 81 -50 -0.325Pin 0 1.25 2.73 4.2 6.2 8.5 -100 -1.05K 0 0.3 0.28 0.28 0.29 0.3 -200 -3.7

K average 67 -300 -7.95

2" No slam up to 9 meterPressure 0 1 3 5 7 9.7

Flow 0 143 207 260 307 365Pin 0 1 3 5 7 9.7K 0 0.38 0.32 0.32 0.32 0.32

K average #DIV/0!

automatic 1/2"-2"0 1 2 3 4 5 6 7 8 0 00 11 16 21 27 32 37 43 48 10 1.259

20 2.73830 4.43740 6.35650 8.49560 10.854

y = 0.0011x2 + 0.0163x

02468

10

0 20 40 60 80 100

Lin

e p

ressu

re [

me

ter]

Outflow M^3/h

DAV-P-1-k/KA

y = 0.0011x2 + 0.0067x

02468

10

0 20 40 60 80

Lin

e p

ressu

re [

me

ter]

Outflow M^3/h

DAV-P-3/4-K/KA

y = 5E-05x3 + 0.0017x2 - 0.0159x

02468

10

0 20 40 60

Lin

e p

ressu

re [

me

ter]

Outflow M^3/h

DAV-P-1/2-K/KA

y = 0.0011x2 + 0.1149x

0

2

4

6

8

0 10 20 30 40 50

Lin

e p

ressu

re [

me

ter]

Flow rate [M^3/h]

Discharge data (Free air flow) Small Nozzle 1/2"-2"

0

1

2

3

4

5

6

7

8

9

10

0 10 20 30 40 50 60 70 80

Lin

e p

ressu

re [

me

ter]

Flow rate [m^3/h]

Discharge Data (free air flow) 1/2", 3/4", 1"

1/2"

3/4"

1"

0

1

2

3

4

5

6

7

8

9

10

0 50 100 150 200 250 300 350

Lin

e p

ressu

re [

me

ter]

Flow rate [m^3/h

Discharge Data (free air flow) 2"

y = 8E-05x2 - 0.0025x

02468

1012

0 100 200 300 400

Lin

e p

ressu

re [

me

ter]

Outflow M^3/h

DAV-P-2-k/KA

-6

-5

-4

-3

-2

-1

0

-75 -65 -55 -45 -35 -25 -15 -5

Lin

e p

ressu

re [

PS

I]

Flow rate [m^3/h]

Inflow Data (free air flow) 1/2", 3/4", 1"

1/2"

3/4"

1"

0

2

4

6

8

0 10 20 30 40 50

Lin

e p

ressu

re [

ba

r]

Flow rate [m^3/h]

Discharge data (Free air flow) Small Nozzle 1/2", 3/4", 1", 2"

-6.00

-5.00

-4.00

-3.00

-2.00

-1.00

0.00

-260 -210 -160 -110 -60 -10

Lin

e p

ressu

re [

PS

I]

Flow rate [m^3/h]

Inflow Data (free air flow) 2"

109876543210

0 50 100 150 200 250 300 350

25 50 75 100 125 150 175 200

12

10

8

6

4

2

DAV Series

Edition 11/2018

5

Surge arresting device for DAV valves

DAV-WP-SASurge arresting device for DAV valves

Features:• Surge Arresting - Automatically prevents water

hammer pressure surges associated with air release valves operation.

• Optimum performance - Air outlet can be adjusted according to surge analysis results, on site to a required aero-dynamic performance. The SA addition is assembled on user selected valves only (at local high elevated points). The flow through other valves remains unrestricted.

• Reliability - Simple, durable mechanism, Can be serviced without having to put the air valve out of service.

Operation:When air is admitted into the pipe, an in “Air Pocket” is created in the local high points where the Air / Vacuum valve is located. The returning flow re-fills the “pocket”. Too-high velocity of the approaching water column may generate a pressure surge when it reaches the valve.

Air ventingThe Surge Arrestor addition of “DAV-WP” valves limits the air outflow, when the escaping air velocity exceeds a threshold value. This optional addition creates a temporary, slow closing “Air Cushion” that decelerates the water velocity, preventing water hammer effect.

Vacuum Breaking (Air Intake)

Decrease or the pressure in the system to negative value and the simultaneous drainage of the valve chamber, forces the floats down, allowing the admittance of air into the pipe. The SA disc moves back and allowing unrestricted air flow into the system.

Air venting Vacuum Breaking (Air Intake)

Principle of operation:

DAV Series

Edition 11/2018

6

Surge arresting device for DAV valves

Aerodynamic Performance

0 20 40 60 80 100

m3/h

Pip

elin

e p

ress

ure

(m

wc)

100

90

80

70

60

50

40

30

20

10

0

Flow chart - Free air outfllow

0

20

40

60

80

100

120

0 20 40 60 80 100

Dimensions:

Valve DAV-P-SA

Dimension SI US

H - Height 70 mm 211/16”

W - Width 98 mm 313/16"

ØH

W

DAV Series

Edition 11/2018

7

Ordering guide:

Ordering data Ordering code Ordering data

DAV-WP □ □ □ □ □ □ □ □ □ □Materials ↑ ↑ ↑ ↑ ↑ End connections

Standard (ST-37 Steel body) → - BS BSPThread

316 SST Body → SST NP NPT

Size I1 ISO10

Flanges

2" / 50 mm → 2 I6 ISO16

3” / 80 mm → 3 A1 ANSI 125/150

4" / 100 mm → 4 BD BSTD/ASTD

6" / 150 mm → 6 J1 JIS-10

Function UN Un-drilled

Combination → KA XX Specify Other

Optional Addition

Ordering example: SA ← Surge Arrestor

DAV-WP-SST-3-KA-SA-I1

This code represents Waste Water air-valve, 80mm / 3”, Combination function with surge arrest component, stainless steel tank and ISO PN10 inlet flange-connection.

Other Dorot air valves applications:

Ordering Guide

ReliabilityReliability

Innovation

ExpertiseInnovation

Expertise

Hundreds of companies in the industrial, civil engineering, municipal and agricultural sectors around the world have chosen DOROT’s innovative and field-proven technologies. Since its establishment in 1946, DOROT leads the valves market with continued innovation, uncompromising excellence and firm commitment to its customers, consulting and supporting them through all stages of a project and overcoming challenges in R&D, design, implementation, and maintenance.

www.dorot.com