• 3/4" Port, 90°, 3 Hole, 40mm PCD, Female Gear Pump Adaptors - Approved Hydraulics Limited
    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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  • In-Line Pressure Reducing And Relieving Valve Direct Acting with Check - Approved Hydraulics Limited
    Regular price £127.12
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    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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  • Scanreco Cross Rod Clamp Brackets - Approved Hydraulics Limited
    Regular price £23.44
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    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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  • 3/4" Port, 90°, 4 Hole, 40mm PCD, Female Gear Pump Adaptors
    Regular price £16.57
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    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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  • 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.

  • Hydra Part FLOW DIVIDER/COMBINER 1/2" in 3/8" Inlet Capy. 24-38 LPM - Approved Hydraulics
    Regular price £128.88
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    FLOW DIVIDER/COMBINER 50/50 1/2" in 3/8"out Inlet Capy. 24-38 LPM

    Key Features

    • Function: 50 ; 50 flow divider ; combiner
    • Porting: 1/2" bsp in ; 3/8" bsp out
    • Flow range: 24-38 lpm
    • Accuracy: maintains equal flows within typical tolerance
    • Use: synchronise two actuators ; recombine return flow
    • Mounting: in line
    Regular price £128.88
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  • Out of Stock
    Hydra Part 1/2"BSP Dual Cross-over 80Lpm Relief Valve - 130-350Bar - Approved Hydraulics
    Regular price £128.33
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    1/2"BSP Dual Cross-over 80Lpm Relief Valves

    Key Features

    • Type: dual cross line relief valve
    • Port size: 1/2"bsp
    • Rated flow: 80 lpm
    • Adjustment range: 100 to 350 bar
    • Function: protects hydraulic motors from shock loads ; cross connected relief
    • Mounting: in line ; flangeable to motor on some models
    • Typical use: omp ; omr ; omh motor protection ; overrunning load control
    Regular price £128.33
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  • Hydra Part CETOP 5 Modular Flow Control Valve on A&B (Z2FDS-10-30-S) - Approved Hydraulics
    Regular price £77.32
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    CETOP 5 Modular Flow Control Valve on A&B (Z2FDS-10-30-S)

    Key Features

    • Interface: iso 4401-05 cetop 5 ng10
    • Function: double throttle ; check meter-in or meter-out on a ; b
    • Max operating pressure: 315 bar
    • Max flow: 160 lpm
    • Temperature: -30 c to +80 c
    Regular price £77.32
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  • Hydra Part SV35 Sequence Valve 3/8"BSP - 35Lpm - 100-350 Bar - Approved Hydraulics
    Regular price £65.08
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    SV35 Sequence Valve 3/8"BSP - 35Lpm - 100-350 Bar

    Key Features

    • Port size: 3/8\" bsp
    • Max flow: 35 lpm
    • Pressure ranges: 10-70 ; 20-210 ; 70-350 bar
    • Function: inline sequence valve to control actuator order
    • Adjustment: hand knob ; tamper proof cap options
    Regular price £65.08
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  • Hydra Part Poppet Check Valve 3/4" 130Lpm, 300 Bar Max Pressure - Approved Hydraulics
    Regular price £22.99
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    Poppet Check Valve 3/4" 130Lpm, 300 Bar Max Pressure

    Key Features

    • Type: inline poppet check valve
    • Port size: 3/4' bsp
    • Max flow: 130 l/min
    • Max pressure: 300 bar
    • Cracking pressure: 0.5 bar typical
    • Function: permits flow one way ; blocks reverse
    Regular price £22.99
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  • Solenoid Operated Check Valves - Pilot Operated - 70 L/min - 350bar - Checked in BOTH Directions - Approved Hydraulics Limited
    Regular price From £111.77
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    Solenoid Operated Check Valves - Pilot Operated - 70 L/min - 350bar - Checked in BOTH Directions

    Key Features

    • Type: solenoid operated pilot-to-open check valve
    • Flow rating: per model
    • Max pressure: 350 bar
    • Check function: checked in both directions
    • Function: holds load until solenoid pilot opens for reverse flow
    Regular price From £111.77
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  • Solenoid Operated Check Valves - Pilot Operated - 70 L/min - 350bar - Checked in BOTH Directions - Approved Hydraulics Limited
    Regular price From £89.24
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    Solenoid Operated Check Valves - Pilot Operated - 40 L/Min - 350bar

    Key Features

    • Type: solenoid operated pilot-to-open check valve
    • Flow rating: 40 L/min
    • Max pressure: 350 bar
    • Check function: check per model
    • Function: holds load until solenoid pilot opens for reverse flow
    Regular price From £89.24
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  • 1/2 BSPP CETOP 5 Single Manifold - 80 L/Min - 20/210 Bar - Aluminium Body - Approved Hydraulics Limited
    Regular price £78.53
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    1/2 BSPP CETOP 5 Single Manifold - 80 L/Min - 20/210 Bar - Aluminium Body

    Key Features

    • Type: single subplate manifold for CETOP 5 (NG10) valves
    • Ports: 1/2 BSPP
    • Max flow: 80 L/min
    • Pressure rating: 20–210 bar
    • Body: aluminium body
    • Use: mount a single directional valve with side ports
    Regular price £78.53
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  • SAE10/2 Solenoid Valve Cartridge - Pilot Operated - 70 L/Min - 350bar - Checked in BOTH Directions - Approved Hydraulics Limited
    Regular price From £67.37
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    SAE8/2 Solenoid Valve Cartridge - Pilot Operated - 40 L/Min - 350bar

    Key Features

    • Type: pilot operated solenoid poppet valve (SAE 8/2)
    • Flow rating: 40 L/min
    • Max pressure: 350 bar
    • Check function: check per model
    • Operation: 2-way; 2-position poppet with manual override on some variants
    • Use: remote open/close of line flow under pressure
    Regular price From £67.37
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  • 1/2 Bonded seal - Approved Hydraulics Limited
    Regular price £0.78
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    1/2 Bonded seal

    Key Features

    • Part number: DOW12
    • Seal type: Bonded seal washer with elastomer insert
    • Size: 1/2 in
    • Materials: Steel outer ring with nitrile rubber sealing element
    • Typical use: Sealing BSP threaded hydraulic fittings; adaptors; and banjo bolts
    • Benefits: High pressure sealing; good resistance to hydraulic fluids
    Regular price £0.78
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  • 3/8" BSP Male x 1/2" BSP Male Adaptor - Approved Hydraulics Limited
    Regular price £3.13
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    1/2 BSPm x 1/2 BSPm

    Key Features

    • Type: hydraulic fitting
    • Threads: 1/2 to 1/2 thread
    • Material: plated carbon steel
    • Use: connect hydraulic components
    • Standard: BSP and related port forms as specified
    Regular price £3.13
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  • 1/2" BSP Male x 3/8" BSP Fixed Female Extended Adaptor - Approved Hydraulics Limited
    Regular price £2.99
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    1/2" BSP Male x 3/8" BSP Fixed Female Extended Adaptor

    Key Features

    • Type: straight thread adaptor
    • Threads: 1/2 to 3/8 thread
    • Standard: BSPP parallel unless specified otherwise
    • Material: plated carbon steel
    • Use: join hoses; valves; or adapt port sizes
    Regular price £2.99
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    • Order by 3pm for Next Day Delivery
  • 1/2" BSP Male x 1/2" BSP Female Swivel Adaptor - Approved Hydraulics Limited
    Regular price £7.21
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    1/2" BSP Male x 1/2" BSP Female Swivel Adaptor

    Key Features

    • Type: swivel adaptor female to female
    • Threads: 1/2 to 1/2 BSP
    • Swivel: captive nuts allow hose connection without twisting
    • Seal: flat-faced or washered seal depending on variant
    • Use: hose-to-hose connection where orientation matters
    Regular price £7.21
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  • 3/8" BSP Male x 1/2" BSP Male Adaptor - Approved Hydraulics Limited
    Regular price £6.78
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    1/2" BSP Male x 3/4" BSP Male Adaptor

    Key Features

    • Type: straight adaptor (BSP adaptor)
    • Threads: 1/2 to 3/4 BSP
    • Standard: BSPP parallel per ISO 228 unless otherwise specified
    • Material: plated carbon steel for hydraulic service
    • Use: join hoses; valves; pipe runs or adapt port sizes
    Regular price £6.78
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/4" BSP Female Swivel x 3/4" BSP Female Swivel - Approved Hydraulics Limited
    Regular price £7.31
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    1/2 BSP Female Swivel x 1/2 BSP Female Swivel Adaptor

    Key Features

    • Type: swivel adaptor (male to male)
    • Threads: 1/2 to 1/2 BSP
    • Swivel: captive nut allows hose connection without twisting
    • Seal: cone/washer seal depending on variant
    • Use: connect hoses where rotation during assembly is restricted
    Regular price £7.31
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1/2" BSP Male x 3/8" BSP Fixed Female Extended Adaptor - Approved Hydraulics Limited
    Regular price £2.70
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    3/8" BSP Male x 3/8" BSP Fixed Female Extended Adaptor

    Key Features

    • Type: male to fixed female extended adaptor
    • Threads: 3/8 to 3/8 BSP
    • Body: extended length to clear guards or deep ports
    • Material: plated carbon steel for hydraulic service
    • Use: adapt port gender/size and increase spanner access
    Regular price £2.70
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  • 1/2" BSP Male x 1/2" BSP Female Swivel Adaptor - Approved Hydraulics Limited
    Regular price £4.52
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    1/4" BSP Male x 1/4" BSP Female Swivel Adaptor

    Key Features

    • Type: swivel adaptor (male to female)
    • Threads: 1/4 to 1/4 BSP
    • Swivel: captive nut allows hose connection without twisting
    • Seal: cone/washer seal depending on variant
    • Use: connect hoses where rotation during assembly is restricted
    Regular price £4.52
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • ADMISSION CONNECTOR 1 1/4'' PIPE 2'' ELBOW - Approved Hydraulics Limited
    Regular price £51.65
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    ADMISSION CONNECTOR 1 1/4'' PIPE 2'' ELBOW

    Key Features

    • Component: pump admission connector
    • Connections: 1 1/4" pipe to 2" elbow
    • Elbow angle: 90°
    • Intended use: pump inlet/suction side
    • Design: swept elbow for improved routing
    • Compatibility: ABER pump suction fittings
    Regular price £51.65
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  • 3/8" BSP Male x 1/2" BSP Male Adaptor - Approved Hydraulics Limited
    Regular price £6.78
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    1/2 BSP Male x 5/8 BSP Male Adaptor

    Key Features

    • Type: inline adaptor male to male
    • Threads: 1/2 BSP to 5/8 BSP
    • Standard: BSPP parallel per ISO 228 unless otherwise specified
    • Material: plated carbon steel for hydraulic service
    • Use: join hoses; valves; pipe runs or extend fittings
    Regular price £6.78
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Allison PTO Pressure Switch - Approved Hydraulics Limited
    Regular price £56.45
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    Allison PTO Pressure Switch

    Key Features

    • Function: hydraulic pressure switch for PTO status
    • Application: Allison PTO circuits
    • Signal: on-off electrical output
    • Use: enables interlocks or indicator lamps
    • Compatibility: 12/24 V vehicle systems
    • Note: preset actuation threshold; verify thread before install
    Regular price £56.45
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Shop All Components for Professional Hydraulic Applications

Discover quality shop all components 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. Browse related products including control valves, line mounted valves 1, hydraulic cylinders, hydraulic pumps to find the right solution for your hydraulic system. 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.