Positive displacement internal gear pumps

Positive displacement internal gear pumps

These heavy-duty STAR Series pumps have packed-type or mechanical seal construction as standard for shaft protection and prevention of leakage. Packed pumps have extra-deep stuffing box. The rotary-type mechanical seal works with pressure, although it can works against. It’s a self-adjusting and no leak mechanical seal and, thanks to its sealing method, prevents scoring of the pump drive shaft. STAR Series mechanical seal pumps are made for viscosities up to 15,000 SSU/ 3.300 cSt: for higher viscosities are available other seals on demand, contact the manufacturer for advice.

Working principle

STAR pumps are internal gear positive displacement rotary pumps. The flow is generated by two gears: the rotor and idler, one inside the other, divided by a crescent. As the gears rotate, liquid is drawn into the spaces created between the gears and the crescent. When the gears mesh, the liquid is forced out of the pump. The result are a smooth flow of liquid and high capacity combined with compact size.

Most important features and benefits

Constant capacity, directly proportional to the rotation speed and virtually independent of the pressure. Smooth flow, without pulsations or pressure peaks which could cause vibrations in the pipework. Versatility. Simply by adjusting the axial position of the rotor, the same pump can handle water-thin liquids or high viscosity

liquids such as bitumen, molasses, resins, polymers, etc. Reversibility. By inverting the direction of rotation the flow of liquid is reversed. Full performance is available in either

direction of flow. Revolving casing. STAR Series features as standard the possibility to rotate in any position (except STAR 140 size, which cannot

turn to 180° position) the casing to cope with piping. In any pump, the relief valve has to point to suction port. Self-priming. The high vacuum created by the pump gets rapid self-priming at the maximum height accordingly with the

physical characteristics of the pumped liquid (temperature, vapor pressure, viscosity, etc.). Simplicity. Only two moving parts: the rotor and idler gears, and only one shaft seal. Rugged, heavy duty construction. Low rotor peripheral speed. External pedestal bearing housing with oversize ball bearing

to take axial and radial loads. Conformity to API 676. Detailed list of exceptions available on request. Low rate of wear. The number of teeth on the rotor and idler are not multiples one of the other. This means that wear is evenly

distributed over the gears since each tooth on one gear touches each tooth on the other gear the same number of times. Wear adjustment system. The wear on the front of the rotor can be compensated for by adjusting the axial position of the

rotor. This ensures constant performance even with considerable wear. Simple, minimal maintenance. Inspection and regulation can be carried out without removing the pump, piping or drive. Positive-lock thrust control. STAR Series has a positive-lock thrust control to position accurately rotor and shaft. Interchangeability. The modular design makes it possible to replace components with others in alternative materials or with

different characteristics. For example, several shaft sealing systems are available, and jacketed covers can be fitted instead of the standard components.

Preheating. Heating chamber mounted on the cover and, for Mod. 075, 100, 140, 420 can be combined also with RELIEF VALVE.

By-pass relief valve. This is mounted as standard in each pump and it’s set to 50 lbs/3,5 bar unless specified differently when ordering. The valve guarantees a protection against overpressure by-passing liquid.

STAR

Operating range

STAR pumps are suitable for pumping liquids of any viscosity. Solids cannot be handled, but the pumps can cope with abrasive particles. Every day, STAR pumps are handling hundreds of different liquids, such as:

acetone chemicals ether isocyanate molasses polymer solutions syrup Other liquidsalcohols chocolate fat kerosene must polyol tar to be evaluatedalkalis colors fuel oil lacquer paint resin trichloroethylene on demandasphalt creams gelatin lard petrol soap varnishbitumen creosote glue lubricating oil petroleum sodium silicate viscosebrine detergents glycerin methanol pitch solvents waxbunker fuel diesel fuel heat transfer oil mineral oil plasticizers starch

STAR Port sizeStandard

port type

Nominal pump ratingMax hydro

pressure

Steel-fitted recommended above viscosity

Max discharge pressure over

SSU 100 / cSt 20 fluid at std speed

Max. temperature

Pack gland - Mech. sealWeight

Model Inch mm LPM GPM RPM PSIG BAR SSU cSt PSIG BAR °C °F °C °F kg lbs

008 1 25 N 30 8 1800 400 28 7500 1.650 200 14 149 300 107 225 10 22

030 1 1/2 40 N 114 30 1800 400 28 7500 1.650 200 14 149 300 107 225 18 40

075 2 50 N 284 75 1800 400 28 25000 5.500 150 10 149 300 107 225 37 81

100 2 50 N 379 100 1800 400 28 25000 5.500 200 14 149 300 107 225 50 110

140 3 80 A 533 140 1800 400 28 25000 5.500 200 14 149 300 107 225 84 185

420 4 100 A 1583 420 1800 400 28 25000 5.500 150 10 149 300 107 225 272 600

Large bearings absorb axial and radial thrust. Lock rings for preciserotor positioning even when the pump is installed.

Packed gland ormechanical sealdepending on theapplications.

Cast iron or steelfitted rotor and idler.

Easily adjusted by-passpressure relief valve.Necessary withoverpressure or when the pipe can be closed.

Standard dimension shaft extension tappedand keyed to facilitate assembly of pulleys orcouplings.

Threaded ring to lock the bearing to the shaft.

Bronze or graphitebushings.

Hardened steelidler pin.

On request: heatingor cooling jacket onthe cover.

These heavy-duty STAR Series pumps have packed-type or mechanical seal construction as standard for shaft protection and prevention of leakage. Packed pumps have extra-deep stuffing box. The rotary-type mechanical seal works with pressure, although it can works against. It’s a self-adjusting and no leak mechanical seal and, thanks to its sealing method, prevents scoring of the pump drive shaft. STAR Series mechanical seal pumps are made for viscosities up to 15,000 SSU/ 3.300 cSt: for higher viscosities are available other seals on demand, contact the manufacturer for advice.

Working principle

STAR pumps are internal gear positive displacement rotary pumps. The flow is generated by two gears: the rotor and idler, one inside the other, divided by a crescent. As the gears rotate, liquid is drawn into the spaces created between the gears and the crescent. When the gears mesh, the liquid is forced out of the pump. The result are a smooth flow of liquid and high capacity combined with compact size.

Most important features and benefits

Constant capacity, directly proportional to the rotation speed and virtually independent of the pressure. Smooth flow, without pulsations or pressure peaks which could cause vibrations in the pipework. Versatility. Simply by adjusting the axial position of the rotor, the same pump can handle water-thin liquids or high viscosity

liquids such as bitumen, molasses, resins, polymers, etc. Reversibility. By inverting the direction of rotation the flow of liquid is reversed. Full performance is available in either

direction of flow. Revolving casing. STAR Series features as standard the possibility to rotate in any position (except STAR 140 size, which cannot

turn to 180° position) the casing to cope with piping. In any pump, the relief valve has to point to suction port. Self-priming. The high vacuum created by the pump gets rapid self-priming at the maximum height accordingly with the

physical characteristics of the pumped liquid (temperature, vapor pressure, viscosity, etc.). Simplicity. Only two moving parts: the rotor and idler gears, and only one shaft seal. Rugged, heavy duty construction. Low rotor peripheral speed. External pedestal bearing housing with oversize ball bearing

to take axial and radial loads. Conformity to API 676. Detailed list of exceptions available on request. Low rate of wear. The number of teeth on the rotor and idler are not multiples one of the other. This means that wear is evenly

distributed over the gears since each tooth on one gear touches each tooth on the other gear the same number of times. Wear adjustment system. The wear on the front of the rotor can be compensated for by adjusting the axial position of the

rotor. This ensures constant performance even with considerable wear. Simple, minimal maintenance. Inspection and regulation can be carried out without removing the pump, piping or drive. Positive-lock thrust control. STAR Series has a positive-lock thrust control to position accurately rotor and shaft. Interchangeability. The modular design makes it possible to replace components with others in alternative materials or with

different characteristics. For example, several shaft sealing systems are available, and jacketed covers can be fitted instead of the standard components.

Preheating. Heating chamber mounted on the cover and, for Mod. 075, 100, 140, 420 can be combined also with RELIEF VALVE.

By-pass relief valve. This is mounted as standard in each pump and it’s set to 50 lbs/3,5 bar unless specified differently when ordering. The valve guarantees a protection against overpressure by-passing liquid.

STAR

Operating range

STAR pumps are suitable for pumping liquids of any viscosity. Solids cannot be handled, but the pumps can cope with abrasive particles. Every day, STAR pumps are handling hundreds of different liquids, such as:

acetone chemicals ether isocyanate molasses polymer solutions syrup Other liquidsalcohols chocolate fat kerosene must polyol tar to be evaluatedalkalis colors fuel oil lacquer paint resin trichloroethylene on demandasphalt creams gelatin lard petrol soap varnishbitumen creosote glue lubricating oil petroleum sodium silicate viscosebrine detergents glycerin methanol pitch solvents waxbunker fuel diesel fuel heat transfer oil mineral oil plasticizers starch

STAR Port sizeStandard

port type

Nominal pump ratingMax hydro

pressure

Steel-fitted recommended above viscosity

Max discharge pressure over

SSU 100 / cSt 20 fluid at std speed

Max. temperature

Pack gland - Mech. sealWeight

Model Inch mm LPM GPM RPM PSIG BAR SSU cSt PSIG BAR °C °F °C °F kg lbs

008 1 25 N 30 8 1800 400 28 7500 1.650 200 14 149 300 107 225 10 22

030 1 1/2 40 N 114 30 1800 400 28 7500 1.650 200 14 149 300 107 225 18 40

075 2 50 N 284 75 1800 400 28 25000 5.500 150 10 149 300 107 225 37 81

100 2 50 N 379 100 1800 400 28 25000 5.500 200 14 149 300 107 225 50 110

140 3 80 A 533 140 1800 400 28 25000 5.500 200 14 149 300 107 225 84 185

420 4 100 A 1583 420 1800 400 28 25000 5.500 150 10 149 300 107 225 272 600

Large bearings absorb axial and radial thrust. Lock rings for preciserotor positioning even when the pump is installed.

Packed gland ormechanical sealdepending on theapplications.

Cast iron or steelfitted rotor and idler.

Easily adjusted by-passpressure relief valve.Necessary withoverpressure or when the pipe can be closed.

Standard dimension shaft extension tappedand keyed to facilitate assembly of pulleys orcouplings.

Threaded ring to lock the bearing to the shaft.

Bronze or graphitebushings.

Hardened steelidler pin.

On request: heatingor cooling jacket onthe cover.

These heavy-duty STAR Series pumps have packed-type or mechanical seal construction as standard for shaft protection and prevention of leakage. Packed pumps have extra-deep stuffing box. The rotary-type mechanical seal works with pressure, although it can works against. It’s a self-adjusting and no leak mechanical seal and, thanks to its sealing method, prevents scoring of the pump drive shaft. STAR Series mechanical seal pumps are made for viscosities up to 15,000 SSU/ 3.300 cSt: for higher viscosities are available other seals on demand, contact the manufacturer for advice.

Working principle

STAR pumps are internal gear positive displacement rotary pumps. The flow is generated by two gears: the rotor and idler, one inside the other, divided by a crescent. As the gears rotate, liquid is drawn into the spaces created between the gears and the crescent. When the gears mesh, the liquid is forced out of the pump. The result are a smooth flow of liquid and high capacity combined with compact size.

Most important features and benefits

Constant capacity, directly proportional to the rotation speed and virtually independent of the pressure. Smooth flow, without pulsations or pressure peaks which could cause vibrations in the pipework. Versatility. Simply by adjusting the axial position of the rotor, the same pump can handle water-thin liquids or high viscosity

liquids such as bitumen, molasses, resins, polymers, etc. Reversibility. By inverting the direction of rotation the flow of liquid is reversed. Full performance is available in either

direction of flow. Revolving casing. STAR Series features as standard the possibility to rotate in any position (except STAR 140 size, which cannot

turn to 180° position) the casing to cope with piping. In any pump, the relief valve has to point to suction port. Self-priming. The high vacuum created by the pump gets rapid self-priming at the maximum height accordingly with the

physical characteristics of the pumped liquid (temperature, vapor pressure, viscosity, etc.). Simplicity. Only two moving parts: the rotor and idler gears, and only one shaft seal. Rugged, heavy duty construction. Low rotor peripheral speed. External pedestal bearing housing with oversize ball bearing

to take axial and radial loads. Conformity to API 676. Detailed list of exceptions available on request. Low rate of wear. The number of teeth on the rotor and idler are not multiples one of the other. This means that wear is evenly

distributed over the gears since each tooth on one gear touches each tooth on the other gear the same number of times. Wear adjustment system. The wear on the front of the rotor can be compensated for by adjusting the axial position of the

rotor. This ensures constant performance even with considerable wear. Simple, minimal maintenance. Inspection and regulation can be carried out without removing the pump, piping or drive. Positive-lock thrust control. STAR Series has a positive-lock thrust control to position accurately rotor and shaft. Interchangeability. The modular design makes it possible to replace components with others in alternative materials or with

different characteristics. For example, several shaft sealing systems are available, and jacketed covers can be fitted instead of the standard components.

Preheating. Heating chamber mounted on the cover and, for Mod. 075, 100, 140, 420 can be combined also with RELIEF VALVE.

By-pass relief valve. This is mounted as standard in each pump and it’s set to 50 lbs/3,5 bar unless specified differently when ordering. The valve guarantees a protection against overpressure by-passing liquid.

STAR

Operating range

STAR pumps are suitable for pumping liquids of any viscosity. Solids cannot be handled, but the pumps can cope with abrasive particles. Every day, STAR pumps are handling hundreds of different liquids, such as:

acetone chemicals ether isocyanate molasses polymer solutions syrup Other liquidsalcohols chocolate fat kerosene must polyol tar to be evaluatedalkalis colors fuel oil lacquer paint resin trichloroethylene on demandasphalt creams gelatin lard petrol soap varnishbitumen creosote glue lubricating oil petroleum sodium silicate viscosebrine detergents glycerin methanol pitch solvents waxbunker fuel diesel fuel heat transfer oil mineral oil plasticizers starch

STAR Port sizeStandard

port type

Nominal pump ratingMax hydro

pressure

Steel-fitted recommended above viscosity

Max discharge pressure over

SSU 100 / cSt 20 fluid at std speed

Max. temperature

Pack gland - Mech. sealWeight

Model Inch mm LPM GPM RPM PSIG BAR SSU cSt PSIG BAR °C °F °C °F kg lbs

008 1 25 N 30 8 1800 400 28 7500 1.650 200 14 149 300 107 225 10 22

030 1 1/2 40 N 114 30 1800 400 28 7500 1.650 200 14 149 300 107 225 18 40

075 2 50 N 284 75 1800 400 28 25000 5.500 150 10 149 300 107 225 37 81

100 2 50 N 379 100 1800 400 28 25000 5.500 200 14 149 300 107 225 50 110

140 3 80 A 533 140 1800 400 28 25000 5.500 200 14 149 300 107 225 84 185

420 4 100 A 1583 420 1800 400 28 25000 5.500 150 10 149 300 107 225 272 600

Large bearings absorb axial and radial thrust. Lock rings for preciserotor positioning even when the pump is installed.

Packed gland ormechanical sealdepending on theapplications.

Cast iron or steelfitted rotor and idler.

Easily adjusted by-passpressure relief valve.Necessary withoverpressure or when the pipe can be closed.

Standard dimension shaft extension tappedand keyed to facilitate assembly of pulleys orcouplings.

Threaded ring to lock the bearing to the shaft.

Bronze or graphitebushings.

Hardened steelidler pin.

On request: heatingor cooling jacket onthe cover.

These heavy-duty STAR Series pumps have packed-type or mechanical seal construction as standard for shaft protection and prevention of leakage. Packed pumps have extra-deep stuffing box. The rotary-type mechanical seal works with pressure, although it can works against. It’s a self-adjusting and no leak mechanical seal and, thanks to its sealing method, prevents scoring of the pump drive shaft. STAR Series mechanical seal pumps are made for viscosities up to 15,000 SSU/ 3.300 cSt: for higher viscosities are available other seals on demand, contact the manufacturer for advice.

Working principle

STAR pumps are internal gear positive displacement rotary pumps. The flow is generated by two gears: the rotor and idler, one inside the other, divided by a crescent. As the gears rotate, liquid is drawn into the spaces created between the gears and the crescent. When the gears mesh, the liquid is forced out of the pump. The result are a smooth flow of liquid and high capacity combined with compact size.

Most important features and benefits

Constant capacity, directly proportional to the rotation speed and virtually independent of the pressure. Smooth flow, without pulsations or pressure peaks which could cause vibrations in the pipework. Versatility. Simply by adjusting the axial position of the rotor, the same pump can handle water-thin liquids or high viscosity

liquids such as bitumen, molasses, resins, polymers, etc. Reversibility. By inverting the direction of rotation the flow of liquid is reversed. Full performance is available in either

direction of flow. Revolving casing. STAR Series features as standard the possibility to rotate in any position (except STAR 140 size, which cannot

turn to 180° position) the casing to cope with piping. In any pump, the relief valve has to point to suction port. Self-priming. The high vacuum created by the pump gets rapid self-priming at the maximum height accordingly with the

physical characteristics of the pumped liquid (temperature, vapor pressure, viscosity, etc.). Simplicity. Only two moving parts: the rotor and idler gears, and only one shaft seal. Rugged, heavy duty construction. Low rotor peripheral speed. External pedestal bearing housing with oversize ball bearing

to take axial and radial loads. Conformity to API 676. Detailed list of exceptions available on request. Low rate of wear. The number of teeth on the rotor and idler are not multiples one of the other. This means that wear is evenly

distributed over the gears since each tooth on one gear touches each tooth on the other gear the same number of times. Wear adjustment system. The wear on the front of the rotor can be compensated for by adjusting the axial position of the

rotor. This ensures constant performance even with considerable wear. Simple, minimal maintenance. Inspection and regulation can be carried out without removing the pump, piping or drive. Positive-lock thrust control. STAR Series has a positive-lock thrust control to position accurately rotor and shaft. Interchangeability. The modular design makes it possible to replace components with others in alternative materials or with

different characteristics. For example, several shaft sealing systems are available, and jacketed covers can be fitted instead of the standard components.

Preheating. Heating chamber mounted on the cover and, for Mod. 075, 100, 140, 420 can be combined also with RELIEF VALVE.

By-pass relief valve. This is mounted as standard in each pump and it’s set to 50 lbs/3,5 bar unless specified differently when ordering. The valve guarantees a protection against overpressure by-passing liquid.

STAR

Operating range

STAR pumps are suitable for pumping liquids of any viscosity. Solids cannot be handled, but the pumps can cope with abrasive particles. Every day, STAR pumps are handling hundreds of different liquids, such as:

acetone chemicals ether isocyanate molasses polymer solutions syrup Other liquidsalcohols chocolate fat kerosene must polyol tar to be evaluatedalkalis colors fuel oil lacquer paint resin trichloroethylene on demandasphalt creams gelatin lard petrol soap varnishbitumen creosote glue lubricating oil petroleum sodium silicate viscosebrine detergents glycerin methanol pitch solvents waxbunker fuel diesel fuel heat transfer oil mineral oil plasticizers starch

STAR Port sizeStandard

port type

Nominal pump ratingMax hydro

pressure

Steel-fitted recommended above viscosity

Max discharge pressure over

SSU 100 / cSt 20 fluid at std speed

Max. temperature

Pack gland - Mech. sealWeight

Model Inch mm LPM GPM RPM PSIG BAR SSU cSt PSIG BAR °C °F °C °F kg lbs

008 1 25 N 30 8 1800 400 28 7500 1.650 200 14 149 300 107 225 10 22

030 1 1/2 40 N 114 30 1800 400 28 7500 1.650 200 14 149 300 107 225 18 40

075 2 50 N 284 75 1800 400 28 25000 5.500 150 10 149 300 107 225 37 81

100 2 50 N 379 100 1800 400 28 25000 5.500 200 14 149 300 107 225 50 110

140 3 80 A 533 140 1800 400 28 25000 5.500 200 14 149 300 107 225 84 185

420 4 100 A 1583 420 1800 400 28 25000 5.500 150 10 149 300 107 225 272 600

Large bearings absorb axial and radial thrust. Lock rings for preciserotor positioning even when the pump is installed.

Packed gland ormechanical sealdepending on theapplications.

Cast iron or steelfitted rotor and idler.

Easily adjusted by-passpressure relief valve.Necessary withoverpressure or when the pipe can be closed.

Standard dimension shaft extension tappedand keyed to facilitate assembly of pulleys orcouplings.

Threaded ring to lock the bearing to the shaft.

Bronze or graphitebushings.

Hardened steelidler pin.

On request: heatingor cooling jacket onthe cover.

Distributed by:Tru-Flo PumpsP: 02 6333 4500