• Z80 Single Acting Spool

    POA

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    • Delivery to UK & Ireland

    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
  • Z80 Motor Spool - Approved Hydraulics Limited

    POA

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    • Delivery to UK & Ireland

    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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    • Delivery to UK & Ireland

    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
    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
  • 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.

  • 1/2" Port, Straight, 40mm PCD, Female Gear Pump Adaptors
    Regular price £6.25
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    • Delivery to UK & Ireland

    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
    • All Items Guaranteed
    • 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
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • 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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    • 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
    • All Items Guaranteed
    • 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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    • 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
    • All Items Guaranteed
    • 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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    • Delivery to UK & Ireland

    3/8" Port, Straight, 30mm PCD, Female Gear Pump Adaptor

    Key Features

    • Thread: 3/8" BSP
    • Angle: Straight
    Regular price £8.22
    • All Items Guaranteed
    • 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
    • All Items Guaranteed
    • 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
    • All Items Guaranteed
    • 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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    • Delivery to UK & Ireland

    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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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Clockwise Group 2 Tandem Hydraulic Pumps - Rear

    POA

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    • Delivery to UK & Ireland

    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
    Regular price £176.28
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    • Delivery to UK & Ireland

    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
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Scanreco Maxi Transmitter Emergency Stop Button - Approved Hydraulics Limited
    Regular price £83.72
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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 £83.72
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 24v Coil for MOD09 Hydraulic Actuator - Approved Hydraulics Limited
    Regular price £64.38
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    • Delivery to UK & Ireland

    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 £64.38
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Scanreco Waist Belt
    Regular price £154.01
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    • Delivery to UK & Ireland

    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 £154.01
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Scanreco Cross Rod Clamp Brackets - Approved Hydraulics Limited
    Regular price £22.32
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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 £22.32
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Scanreco Cigarette Plug Adaptor 12V/24V (Hydra Part)
    Regular price £21.44
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    • Delivery to UK & Ireland

    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 £21.44
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Scanreco Mini Transmitter Emergency Stop Button - Approved Hydraulics Limited
    Regular price £81.11
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    • Delivery to UK & Ireland

    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 £81.11
    • All Items Guaranteed
    • 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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    • Delivery to UK & Ireland

    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
  • Hydra Part 1/2" 3 Port Pressure Compensating Flow Control with bypass to line - Approved Hydraulics
    Regular price £347.56
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    • Delivery to UK & Ireland

    1" 3 Port Pressure Compensating Flow Control with bypass to line

    Key Features

    • Max Inlet Flow: 200 Lpm
    • Max Adjusted Flow: 170 Lpm
    • Max Pressure: 350 Bar
    • Function: Pressure compensated flow control; regulates actuator speed
    • Notes: Specification information is limited in source listing; confirm dimensions and compatibility before purchase
    Regular price £347.56
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • LS1 360° Rotary Actuator
    Regular price £3,960.06
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    • Delivery to UK & Ireland

    LS1 360° Rotary Actuator

    Key Features

    • Rotation: 360 °
    • Torque: 2700 Nm
    • Max working pressure: 210 bar
    • Specification: Load holding valve.
    • Radial load capacity: 6700 kg
    • Axial load capacity: 6700 kg
    • Specification: Industrial Heavy load rotation
    • Specification: Manufacturing jig operation
    • Specification: Civil engineering grapple rotation applications
    • Specification: Access platform rotation
    Regular price £3,960.06
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Scanreco Antenna - Approved Hydraulics Limited
    Regular price £66.28
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    • Delivery to UK & Ireland

    Scanreco Antenna

    Key Features

    • Type: receiver antenna for RC400
    • Impedance: 50 ohm typical
    • Mounting: magnetic base or bracket per kit
    • Connector: coax to RC400 receiver
    • Use: improve radio link quality
    Regular price £66.28
    • All Items Guaranteed
    • 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
    • All Items Guaranteed
    • 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
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery

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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.