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Hydraulic Gear Pump


The basic form of hydraulic gear pump is that two gears of the same size engage and rotate each other in a closely matched shell. The inner part of the shell is similar to the "8" shape. Two gears are installed inside, and the outer diameter and sides of the gear are closely matched with the shell. Material from the extruder enters into the middle of the two gears at the suction port and fills the space. It moves along the shell with the rotation of the teeth, and finally discharges when the two teeth engage.


In terminology, gear pump is also called positive displacement device, that is, like a piston in a cylinder, when one tooth enters the fluid space of another tooth, because the liquid is incompressible, so the liquid and the tooth can not occupy the same space at the same time, so the liquid is mechanically squeezed out. Because of the continuous meshing of teeth, this phenomenon occurs continuously, thus providing a continuous exclusion quantity at the outlet of the pump. Every turn of the pump, the discharge quantity is the same. With the uninterrupted rotation of the drive shaft, the pump also discharges fluid uninterruptedly. The flow rate of the pump is directly related to the speed of the pump.

In fact, there is a small amount of fluid loss in the pump, because these fluids are used to lubricate both sides of bearings and gears, and the pump body is never able to cooperate without clearance, so the fluid can not be discharged 100% from the outlet, so a small amount of fluid loss is inevitable, which makes the operation efficiency of the pump can not reach 100%. However, the pump can still run well, and for most extruded materials, the efficiency can still reach 93%-98%.

The speed of a pump is actually limited, which mainly depends on the process fluid. If the oil is transferred, the pump can rotate at a very high speed. But when the fluid is a high viscosity polymer melt, the limit will be greatly increased. It is very important to push the high viscous fluid into the two teeth space on the side of the suction port. If the space is not filled up, the pump can not discharge the accurate flow, so the PV value is another limiting factor, and it is also a process variable. Due to these limitations, gear pump manufacturers will provide a range of products, namely, different specifications and displacement. These pumps will be combined with specific application process to optimize system capacity and price.


Depending on your requirement and type of industry, you can buy the best quality and advanced hydraulic gear pumps online at competitive prices and get a guide to their installation and use.
P330 Hydraulic Bushing Gear Pump PGP330B197**AB10-25HWAB10-1HWA
P330 Hydraulic Bushing Gear Pump PGP330B197**AB10-25HWAB10-1HWA

Model: PGP330B197**AB10-25HWAB10-1HWA

Reference Price: $280

Unit:Double unit

Shaft end cover: SAE 2 bolt "B" mount

Rotation: Clockwise

Fornt Gear Width:1"

Front Displacement: 20.32 ml/r

Rear Gear Width:1"

Rear Displacement: 20.32 ml/r

Pressure: 3500PSI

P330 Hydraulic Bushing Gear Pump PGP330B197**AB17-25
P330 Hydraulic Bushing Gear Pump PGP330B197**AB17-25

Model: PGP330B197**AB17-25

Reference Price: $160

Unit:Single unit

Shaft end cover: SAE 2 bolt "B" mount

Rotation: Clockwise

Gear Width:1.75"

Displacement: 35.56 ml/r

Pressure: 2900PSI

P330 Hydraulic Bushing Gear Pump PGP330B197**AB20-25
P330 Hydraulic Bushing Gear Pump PGP330B197**AB20-25

Model: PGP330B197**AB20-25

Reference Price: $160

Unit:Single unit

Shaft end cover: SAE 2 bolt "B" mount

Rotation: Clockwise

Gear Width:2"

Displacement: 40.64 ml/r

Pressure: 2500PSI

P330 Hydraulic Bushing Gear Pump PGP330B297**AB15-25
P330 Hydraulic Bushing Gear Pump PGP330B297**AB15-25

Model: PGP330B297**AB15-25

Reference Price: $160

Unit:Single unit

Shaft end cover: SAE 2 bolt "B" mount

Rotation: Counter Clockwise

Gear Width:1.5"

Displacement: 30.48 ml/r

Pressure: 3300PSI

3249110147 Bushing Gear Pump
3249110147 Bushing Gear Pump

56cc rotation Left

Tree Z = 13 SAE B

Flange SAE B

ASP: Tube Ø38 mm

REF: 48X22

Price: $130~$150

7029120048 Hydraulic Gear Pump
7029120048 Hydraulic Gear Pump

PGP620B0360CE1H3WS7*D5C-620A02 90XB1D4B1B1

Shaft Type: SAE B Spline 15Z*16/32DP*30R

Rotation: Right

Speed: 2400RPM(Min:500;Max:3000) 

Front Pump Pressure: 22MPa

RearPump Pressure: 22MPa

Front Pump Displacement: 36 ml/r

Rear Pump Displacement:29 ml/r

Price: $270~$300

7029122052 PGP620 Hydraulic Gear Pump
7029122052 PGP620 Hydraulic Gear Pump

PGP620B0370AE2H3N-T5P2C-620A0290XB1D4B1B1

Shaft Type: SAE B Spline 15Z*16/32DP*30R

Rotation: CCW

Speed: 2400RPM(Min:500;Max:3500) 

Front Pump Pressure: 25MPa

Rear Pump Pressure: 27.5MPa

Front Pump Displacement: 37 ml/r

Rear Pump Displacement: 29 ml/r

Price: $270~$300


Hydraulic gear pump P330 Bushing pump P330A597FYAB15-25
Hydraulic gear pump P330 Bushing pump P330A597FYAB15-25

P330 Bushing pump P330A597FYAB15-25

Unit price:$155-$165

Hydraulic gear pump P330 Bushing pump P330A297JFAB17-25
Hydraulic gear pump P330 Bushing pump P330A297JFAB17-25

P330 Bushing pump P330A297JFAB17-25

Unit price:$155-$165

Hydraulic gear pump P330 Bushing pump HP330A297JFAB20-25
Hydraulic gear pump P330 Bushing pump HP330A297JFAB20-25

P330 Bushing pump P330A297JFAB20-25

Unit price:$155-$165

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