• ABER Solenoid Operated Bypass Valve with Relief To Work In Pumps Of 80cc
    Regular price £543.83
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    ABER Solenoid Operated Bypass Valve with Relief To Work In Pumps Of 80cc

    Key Features

    • Model: BPR80H (with relief)
    • Pump size: 80 cc/rotation
    • Solenoid: 24 VDC
    • Pressure class: up to 350 bar (family rating)
    • Function: unloads pump and limits pressure via relief
    • Mounting: bolts to pump end-cap; symmetrical orientation
    • Operation: engage/disengage at no-load (<20 bar)
    Regular price £543.83
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  • Out of Stock
    BYPASS VALVE TO WORK IN PUMPS FROM 17cc/rot TO 60cc/rot; 24 VDC
    Regular price £454.40
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    BYPASS VALVE TO WORK IN PUMPS FROM 17cc/rot TO 60cc/rot; 24 VDC

    Key Features

    • Compatibility: pump sizes 17–60 cc/rev
    • Coil: 24 VDC solenoid (12 V on request)
    • Max pressure: up to 350 bar family rating
    • Function: unloads pump by bypassing pressure to inlet
    • Variants: versions with integrated relief valve available
    • Mounting: bolts to pump end‑cap (symmetrical orientation)
    Regular price £454.40
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  • BYPASS VALVE TO WORK IN PUMPS OF 80cc/rot; 24 VDC
    Regular price £425.02
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    BYPASS VALVE TO WORK IN PUMPS OF 80cc/rot; 24 VDC

    Key Features

    • Model: BP80H (without relief)
    • Pump size: 80 cc/rotation
    • Solenoid: 24 VDC
    • Pressure class: up to 350 bar (family rating)
    • Function: unloads pump by bypassing to inlet
    • Mounting: bolts to pump end-cap; symmetrical orientation
    • Operation: actuate only at no-load (<20 bar)
    Regular price £425.02
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  • ADAPTOR EN/ISO /4 Bolts) to PUMP UNI (3 Bolts); With One Ball Bearings
    Regular price £96.30
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    ADAPTOR EN/ISO /4 Bolts) to PUMP UNI (3 Bolts); With One Ball Bearings

    Key Features

    • Mounting interfaces: PTO EN.ISO 4 bolt to UNI 3 bolt
    • Integrated bearing: one ball bearing
    • Max torque: 315 N.m
    • Max power at 1000 rpm: 33 kW
    • Use case: fit UNI 3 bolt pumps to ISO 4 bolt PTO housings
    • Construction: steel adaptor with precision machining
    • Accessories: studs ; gaskets available in kits
    Regular price £96.30
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  • Adam Hindle

    Sales Director

    I began my engineering career at Stockport College in around 2005, first completing a National Diploma in Electrical Engineering, followed by a Higher National Diploma in Mechanical Engineering. I then progressed to the University of Salford, where I earned a BEng (Hons) degree in Mechanical Engineering.

    After graduating, I started my professional career with Approved Hydraulics. I initially gained a combination of hands-on workshop experience and telephone-based sales experience. In later years, I moved into a full-time sales role and led the new crane and excavator attachments department that the company had recently established.

  • Out of Stock
    PTO Gear Pump Flange Adaptors
    Regular price From £73.98
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    PTO Gear Pump Flange Adaptors

    Key Features

    • Function: Adaptor between PTO gearboxes and external gear pumps
    • Flange patterns: EU 4 bolt ; SAE A/B and brand specific options
    • Shaft interfaces: 1/8 taper ; 1/5 taper ; parallel ; splined options
    • Pump groups: Group 2 ; Group 3 compatibility
    • Use: Mount pump securely to PTO for mobile hydraulic kits
    Regular price From £73.98
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  • Bearing Support for Group 2 Pump
    Regular price £90.56
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    Bearing Support for Group 2 Pump

    Key Features

    • Pump group: External gear pump ; Group 2
    • Shaft options: Ø18 mm parallel 6 mm key ; Ø22 mm parallel ; 1/8 taper
    • Radial load capacity: ≈318 daN at 1500 rpm
    • Rated lifetime: ≈3500 h at 1500 rpm at rated load
    • Lubrication: Grease to DIN 51502 MPF 1K-20
    • Mounting: Direct flanged between drive and pump ; takes belt or chain side load
    • Typical use: Protects pump bearings in pulley ; sprocket ; belt drives
    Regular price £90.56
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  • 1" Port, 90°, 3 Hole, 51mm PCD, Female Gear Pump Adaptors
    Regular price £19.04
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    1" Port, 90°, 3 Hole, 51mm PCD, Female Gear Pump Adaptors

    Key Features

    • Type: female gear pump adaptor
    • Orientation: 90°
    • Port: per selection
    • Mounting: 3 hole on 51 mm pcd
    • Use: connect pump outlet to hose or fittings
    Regular price £19.04
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1/2" Port, 90°, 3 Hole, 30mm PCD, Female Gear Pump Adaptors
    Regular price £6.88
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    1/2" Port, 90°, 3 Hole, 30mm PCD, Female Gear Pump Adaptors

    Key Features

    • Type: female gear pump adaptor
    • Orientation: 90°
    • Port: 1/2"
    • Mounting: 3 hole on 30 mm pcd
    • Use: connect pump outlet to hose or fittings
    Regular price £6.88
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    • Order by 3pm for Next Day Delivery
  • 1/2" Port, 90°, 3 Hole, 40mm PCD, Female Gear Pump Adaptors
    Regular price £11.39
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    1/2" Port, 90°, 3 Hole, 40mm PCD, Female Gear Pump Adaptors

    Key Features

    • Type: female gear pump adaptor
    • Orientation: 90°
    • Port: 1/2"
    • Mounting: 3 hole on 40 mm pcd
    • Use: connect pump outlet to hose or fittings
    Regular price £11.39
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1/2" Port, 90°, 4 Hole, 40mm PCD, Female Gear Pump Adaptors
    Regular price £9.66
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    • Delivery to UK & Ireland

    1/2" Port, 90°, 4 Hole, 40mm PCD, Female Gear Pump Adaptors

    Key Features

    • Type: female gear pump adaptor
    • Orientation: 90°
    • Port: 1/2"
    • Mounting: 4 hole on 40 mm pcd
    • Use: connect pump outlet to hose or fittings
    Regular price £9.66
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1/2" Port, Straight, 40mm PCD, Female Gear Pump Adaptors
    Regular price £6.25
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    1/2" Port, Straight, 40mm PCD, Female Gear Pump Adaptors

    Key Features

    • Type: female gear pump adaptor
    • Orientation: straight
    • Port: 1/2"
    • Mounting: 3/4 hole on 40 mm pcd
    • Use: connect pump outlet to hose or fittings
    Regular price £6.25
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/4" Port, 90°, 3 Hole, 40mm PCD, Female Gear Pump Adaptors
    Regular price £20.44
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    3/4" Port, 90°, 3 Hole, 40mm PCD, Female Gear Pump Adaptors

    Key Features

    • Type: female gear pump adaptor
    • Orientation: 90°
    • Port: 3/4"
    • Mounting: 3 hole on 40 mm pcd
    • Use: connect pump outlet to hose or fittings
    Regular price £20.44
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/4" Port, 90°, 4 Hole, 40mm PCD, Female Gear Pump Adaptors
    Regular price £16.57
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    • Delivery to UK & Ireland

    3/4" Port, 90°, 4 Hole, 40mm PCD, Female Gear Pump Adaptors

    Key Features

    • Type: female gear pump adaptor
    • Orientation: 90°
    • Port: 3/4"
    • Mounting: 4 hole on 40 mm pcd
    • Use: connect pump outlet to hose or fittings
    Regular price £16.57
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/4" Port, Straight, 51mm PCD, Female Gear Pump Adaptors
    Regular price £13.07
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    • Delivery to UK & Ireland

    3/4" Port, Straight, 51mm PCD, Female Gear Pump Adaptors

    Key Features

    • Type: female gear pump adaptor
    • Orientation: straight
    • Port: 3/4"
    • Mounting: 3/4 hole on 51 mm pcd
    • Use: connect pump outlet to hose or fittings
    Regular price £13.07
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8" Port, 90°, 3 Hole, 30mm PCD, Female Gear Pump Adaptor
    Regular price £9.18
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    3/8" Port, 90°, 3 Hole, 30mm PCD, Female Gear Pump Adaptor

    Key Features

    • Thread: 3/8" BSP
    • Angle: 90°
    Regular price £9.18
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8" Port, Straight, 30mm PCD, Female Gear Pump Adaptor
    Regular price £8.22
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    3/8" Port, Straight, 30mm PCD, Female Gear Pump Adaptor

    Key Features

    • Thread: 3/8" BSP
    • Angle: Straight
    Regular price £8.22
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • HP-10C Group 1 Pump Seal Kit
    Regular price £15.37
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    • Delivery to UK & Ireland

    HP-10C Group 1 Pump Seal Kit

    Key Features

    • Compatibility: Hydra Part HP-10C Group 1 gear pumps
    • Intended use: renew shaft and static seals during Group 1 pump overhaul
    • Typical kit contents: front shaft oil seal ; body o rings ; gasket elements for Group 1 casing
    • Pump family: light duty aluminium gear pumps used widely on compact hydraulics
    • Service note: check for shaft play ; replace bearings if excessive to protect new seal
    • Applications: power packs ; small mobile circuits ; low to mid power implements
    Regular price £15.37
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • HP-20C type Group 2 Pump Seal Kit
    Regular price £19.74
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    • Delivery to UK & Ireland

    HP-20C type Group 2 Pump Seal Kit

    Key Features

    • Compatibility: Hydra Part HP-20C Group 2 gear pumps including common 1.8 taper variants
    • Intended use: replacement of front shaft seal and static seals during pump service
    • Typical kit contents: shaft lip seal ; body o rings and gaskets as required for Group 2 pumps
    • Reference performance: many Group 2 pumps in range rated up to 250 bar continuous service
    • Application: agricultural PTO pumps ; mobile hydraulics ; general industrial systems
    • Service note: inspect shaft journal and bushings ; replace if wear marks exceed spec
    Regular price £19.74
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • HP-30C Type Group 3 Pump Seal Kit
    Regular price £26.32
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    • Delivery to UK & Ireland

    HP-30C Type Group 3 Pump Seal Kit

    Key Features

    • Compatibility: Hydra Part HP-30C Group 3 aluminium gear pumps
    • Intended use: service kit for shaft and static seals on Group 3 pump body
    • Typical kit contents: front lip seal ; cover o rings and body seals for Group 3 construction
    • Reference performance: Group 3 pumps in range typically used at higher flows and pressures
    • Applications: PTO driven systems ; industrial power units requiring larger displacements
    • Fitment check: confirm HP-30C family before ordering to ensure correct diameters
    Regular price £26.32
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • HP-C20 Tandem Gear Pump Seal Kit. Suits Front 067 or Rear 066
    Regular price £11.17
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    HP-C20 Tandem Gear Pump Seal Kit. Suits Front 067 or Rear 066

    Key Features

    • Compatibility: Hydra Part Group 2 tandem pumps using front code 067 ; rear code 066 interfaces
    • Intended use: renew the sealing set when splitting tandem sections or replacing shaft seal
    • Typical kit contents: shaft seal ; o rings ; interface seals used between tandem pump sections
    • Notes on assembly: ensure rear shaft selection matches torque from front section during build
    • Applications: tandem pumps on tippers ; loaders ; auxiliary hydraulic circuits
    • Variant note: front 067 ; rear 066 code covers common Group 2 tandem configurations
    Regular price £11.17
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • SEAL KIT FOR GEAR PUMPS - BI-DIRECTIONAL
    Regular price £19.98
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    SEAL KIT FOR GEAR PUMPS - BI-DIRECTIONAL

    Key Features

    • Application: ABER bi‑directional external gear pumps (e.g., B3 series)
    • Function: replaces primary seals to stop leakage under pressure
    • Benefit: restores pump efficiency and service life
    • Contents: sealing elements sized for ABER bi‑rotational pumps
    • Use: maintenance/service of truck hydraulic pumps
    Regular price £19.98
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery

Gear Pump Spares

Common Calculations FAQs

Calculating force, speed, pressure, power, and efficiency in hydraulic applications.

How do you calculate actuator speed?

Actuator speed is determined by flow rate and cross-sectional area:

Speed = Flow rate ÷ Area

Flow rate is the volume of fluid delivered (in L/min or GPM).

Area is the cross-sectional area of the actuator piston: π × (diameter ÷ 2)².

How do you calculate cylinder force?

Cylinder force can be calculated using:

Force = Pressure × Area

Pressure is the system pressure (in psi or bar).

Area is the cross-sectional area of the cylinder bore (in square inches or square centimeters).

Area = π × (bore diameter ÷ 2)².

How do you calculate pressure drop across a valve?

Pressure drop can be calculated using the valve flow coefficient (Cv):

Pressure Drop (ΔP) = (Flow Rate)² ÷ (Cv² × Fluid Density)

Flow Rate is the fluid flow (in GPM or L/min).

Cv is the valve flow coefficient.

Fluid Density is the density of the hydraulic fluid.

How do you size an accumulator?

Accumulator sizing considers required flow, pressure, and pre-charge:

Accumulator Volume = Flow Rate × Time ÷ Pressure

This determines how much fluid must be stored to maintain system pressure.

How to convert psi to bar?

Use the conversion factor: 1 bar = 14.5 psi.

To convert psi to bar, divide psi by 14.5.

Example: 200 psi ÷ 14.5 = 13.79 bar.

What is pre-charge pressure in an accumulator?

Pre-charge pressure is the initial gas pressure in the accumulator before fluid enters.

It helps maintain system pressure as the accumulator discharges.

Typically set to 70–80% of system operating pressure.

What is specific gravity of hydraulic fluid?

Specific gravity is the ratio of hydraulic fluid density to water.

A value of 1 means equal density.

Less than 1 means the fluid floats; greater than 1 means it sinks.

What is torque in a hydraulic motor?

Torque is the rotational force produced based on system pressure and motor displacement:

Torque = Pressure × Displacement ÷ 2π

Pressure is the operating system pressure.

Displacement is the volume displaced per revolution (in cubic inches or cubic centimeters).

What unit is hydraulic power measured in?

Hydraulic power is measured in horsepower (HP) or kilowatts (kW).

Hydraulic horsepower can be calculated using:

HP = (Pressure (psi) × Flow rate (GPM)) ÷ 1714.

What’s the relationship between pump speed and flow?

Flow rate is directly proportional to pump speed.

If pump speed doubles, flow rate doubles (assuming constant displacement).

This is important when adjusting flow or selecting a pump for varying speeds.