• 45L FW Lever Operated Monoblock Valve (3/8"BSP) - Approved Hydraulics Limited
    Regular price £68.71
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    45L FW Lever Operated Monoblock Valve (3/8"BSP)

    Key Features

    • Type: 45l lever operated monoblock valve
    • Ports: 3/8" bsp
    • Spools: double acting sections
    • Relief: adjustable main relief
    • Use: mobile attachments ; tipper ; agricultural circuits
    Regular price £68.71
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  • 3/4" Port, Straight, 51mm PCD, Female Gear Pump Adaptors
    Regular price £13.07
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    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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  • 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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  • Z80 Single Acting Spool - Approved Hydraulics Limited

    POA

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    Z80 Single Acting Spool

    Key Features

    • Type: z80 single acting spool for sectional valve
    • Function: selects porting for motor or single acting cylinder
    • Use: configure z series valve bank per function
    • Material: hardened spool with precision grinding
    • Service: replace or build specific sections

    POA

    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice
  • Team Member

    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.

  • Z80 Motor Spool - Approved Hydraulics Limited

    POA

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    Z80 Motor Spool

    Key Features

    • Type: z80 motor spool for sectional valve
    • Function: selects porting for motor or single acting cylinder
    • Use: configure z series valve bank per function
    • Material: hardened spool with precision grinding
    • Service: replace or build specific sections

    POA

    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice
  • Z50 Motor Spool - Approved Hydraulics Limited

    POA

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    Z50 Motor Spool

    Key Features

    • Type: z50 motor spool for sectional valve
    • Function: selects porting for motor or single acting cylinder
    • Use: configure z series valve bank per function
    • Material: hardened spool with precision grinding
    • Service: replace or build specific sections

    POA

    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice
  • 3/4" Port, 90°, 3 Hole, 40mm PCD, Female Gear Pump Adaptors - Approved Hydraulics Limited
    Regular price £20.44
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    • Delivery to UK & Ireland

    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
  • 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
  • 1/2" Port, 90°, 4 Hole, 40mm PCD, Female Gear Pump Adaptors - Approved Hydraulics Limited
    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, 90°, 3 Hole, 40mm PCD, Female Gear Pump Adaptors - Approved Hydraulics Limited
    Regular price £11.39
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    • Delivery to UK & Ireland

    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°, 3 Hole, 30mm PCD, Female Gear Pump Adaptors - Approved Hydraulics Limited
    Regular price £6.88
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    • Delivery to UK & Ireland

    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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    • 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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    • 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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    • Delivery to UK & Ireland

    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
  • Anti-clockwise Group 2 Tandem Hydraulic Pumps - Rear
    Regular price £167.04
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    Anti-clockwise Group 2 Tandem Hydraulic Pumps - Rear

    Key Features

    • Type: group 2 tandem external gear pump
    • Displacement: 4.5 to 25 cc per rev per section
    • Rotation: clockwise
    • Mounting: 2 or 4 bolt flange per variant
    • Use: supply multiple circuits from one drive
    Regular price £167.04
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  • Clockwise Group 2 Tandem Hydraulic Pumps - Rear

    POA

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    Clockwise Group 2 Tandem Hydraulic Pumps - Rear

    Key Features

    • Type: group 2 tandem external gear pump
    • Displacement: 4.5 to 25 cc per rev per section
    • Rotation: clockwise
    • Mounting: 2 or 4 bolt flange per variant
    • Use: supply multiple circuits from one drive

    POA

    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice
  • Anti-Clockwise Group 2 Tandem Hydraulic Pumps - Front - Approved Hydraulics Limited
    Regular price £176.28
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    Anti-Clockwise Group 2 Tandem Hydraulic Pumps - Front

    Key Features

    • Type: group 2 tandem external gear pump
    • Displacement: 4.5 to 25 cc per rev per section
    • Rotation: clockwise
    • Mounting: 2 or 4 bolt flange per variant
    • Use: supply multiple circuits from one drive
    Regular price £176.28
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Scanreco Maxi Transmitter Emergency Stop Button - Approved Hydraulics Limited
    Regular price £87.91
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    • Delivery to UK & Ireland

    Scanreco Maxi Transmitter Emergency Stop Button

    Key Features

    • Type: scanreco radio remote component
    • Compatibility: rc400 series
    • Use: proportional control ; machine remote operation
    • Note: model specific details per part number
    • Service: consult oem manual for wiring
    Regular price £87.91
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  • 24v Coil for MOD09 Hydraulic Actuator - Approved Hydraulics Limited
    Regular price £67.61
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    24v Coil for MOD09 Hydraulic Actuator

    Key Features

    • Type: proportional coil for MOD09 hydraulic actuator
    • Supply: 24 vdc
    • Fit: 19 mm bore ; 50 mm length core tube
    • Connector: DIN 43650 interface
    • Use: drive proportional servo module operation
    Regular price £67.61
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • In-Line Pressure Reducing And Relieving Valve Direct Acting with Check - Approved Hydraulics Limited
    Regular price £127.12
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    • Delivery to UK & Ireland

    In-Line Pressure Reducing And Relieving Valve Direct Acting with Check

    Key Features

    • Max Flow: 30LPM
    • Max Pressure REG: 140 Bar
    • Max Pressure IN: 350 Bar
    • Function: Pressure reducing and relief regulation with check; protects downstream circuit
    • Notes: Specification information is limited in source listing; confirm dimensions and compatibility before purchase
    Regular price £127.12
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    • Order by 3pm for Next Day Delivery
  • Scanreco Waist Belt - Approved Hydraulics Limited
    Regular price £161.71
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    Scanreco Waist Belt

    Key Features

    • Type: scanreco radio remote component
    • Compatibility: rc400 series
    • Use: proportional control ; machine remote operation
    • Note: model specific details per part number
    • Service: consult oem manual for wiring
    Regular price £161.71
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Scanreco Cross Rod Clamp Brackets - Approved Hydraulics Limited
    Regular price £23.44
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    • Delivery to UK & Ireland

    Scanreco Cross Rod Clamp Brackets

    Key Features

    • Brand: Scanreco
    • Notes: Specification information is limited in source listing; confirm dimensions and compatibility before purchase
    • Notes: Details not stated
    • Notes: Details not stated
    • Notes: Details not stated
    Regular price £23.44
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Scanreco Cigarette Plug Adaptor 12V/24V (Hydra Part) - Approved Hydraulics Limited
    Regular price £22.52
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    Scanreco Cigarette Plug Adaptor 12V/24V (Hydra Part)

    Key Features

    • Voltage: 12 V ; 24 V options
    • Use case: Power take off unit for driving hydraulic pumps on commercial vehicle gearboxes
    • Brand: Scanreco
    • Notes: Specification information is limited in source listing; confirm dimensions and compatibility before purchase
    • Notes: Details not stated
    Regular price £22.52
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    • Order by 3pm for Next Day Delivery
  • Scanreco Mini Transmitter Emergency Stop Button - Approved Hydraulics Limited
    Regular price £85.16
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    Scanreco Mini Transmitter Emergency Stop Button

    Key Features

    • Type: latching emergency stop
    • Use: scanreco mini transmitter
    • Function: twist ; pull reset typical
    • Note: oem replacement part
    • Application: hydraulic attachment component
    Regular price £85.16
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Triple Gear Pump - Gp2 17cc - Gp1 3.3+3.3 - 1:8 taper
    Regular price £384.42
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    Triple Gear Pump - Gp2 17cc - Gp1 3.3+3.3 - 1:8 taper

    Key Features

    • Displacement: 17 cc/rev
    • Euro flange with: 1/8 taper shaft
    • Max working pressure: 260 bar
    • Specification: BSP threaded ports
    • Displacement: 3.3 cc/rev
    • Max working pressure: 280 bar
    • Use case: PTO driven hydraulic gear pump for mobile hydraulics; tipping; cranes; auxiliaries
    Regular price £384.42
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery

Google Shopping for Professional Hydraulic Applications

Discover quality google shopping from Approved Hydraulics, trusted by professionals across construction, transport, forestry, agriculture and industrial sectors. Built for demanding working environments, our range offers dependable performance, durable construction and trusted reliability. Whether you are replacing existing parts or specifying components for a new build, our experienced team can help you find the right product. With fast UK delivery and expert technical support, Approved Hydraulics supplies hydraulic equipment you can rely on.

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.