• 2 Port Manifold for SA10/2 Cartridge 1/2” BSPP Ports - 350 Bar
    Regular price £11.93 Ex VAT £14.32 Inc VAT
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    2 Port Manifold for SA10/2 Cartridge 1/2” BSPP Ports - 350 Bar

    Key Features

    • Type: 2-port manifold block for SAE 10/2 screw-in cartridges
    • Ports: as specified
    • Pressure rating: 350 bar
    • Cavity: SAE 10/2 twin cavity arrangement
    • Body: machined manifold with threaded BSPP ports
    • Use: line mounting of cartridge valves in compact circuits
    Regular price £11.93 Ex VAT £14.32 Inc VAT
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    • Order by 3pm for Next Day Delivery
  • 2 Port Manifold For SAE8/2 Cartridge 3/8” BSPP Ports - 350 Bar
    Regular price £11.93 Ex VAT £14.32 Inc VAT
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    2 Port Manifold For SAE8/2 Cartridge 3/8” BSPP Ports - 350 Bar

    Key Features

    • Type: hydraulic component
    • Design: high reliability construction for mobile hydraulics
    • Use: suits the specified application
    • Material: steel body with corrosion protection
    Regular price £11.93 Ex VAT £14.32 Inc VAT
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  • Tamper proof cap M10 - RED color - Approved Hydraulics Limited
    Regular price £1.16 Ex VAT £1.40 Inc VAT
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    Tamper proof cap M8 - RED Color

    Key Features

    • Type: tamper-proof cap for valve adjusters
    • Thread: M10
    • Colour: red for quick identification
    • Function: prevents unauthorised adjustment
    • Material: durable polymer or plated steel per variant
    Regular price £1.16 Ex VAT £1.40 Inc VAT
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8 BSPP Insert Reverse Check Valve Poppet Type - Cracking Pressure 0.5 Bar
    Regular price £21.33 Ex VAT £25.60 Inc VAT
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    3/8 BSPP Insert Reverse Check Valve Poppet Type - Cracking Pressure 0.5 Bar

    Key Features

    • Type: hydraulic component
    • Design: high reliability construction for mobile hydraulics
    • Use: suits the specified application
    • Material: steel body with corrosion protection
    Regular price £21.33 Ex VAT £25.60 Inc VAT
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 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.

  • 3/8 BSPP Insert Check Valve Poppet Type - Cracking Pressure 0.5 Bar
    Regular price £15.00 Ex VAT £18.00 Inc VAT
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    3/8 BSPP Insert Check Valve Poppet Type - Cracking Pressure 0.5 Bar

    Key Features

    • Type: hydraulic component
    • Design: high reliability construction for mobile hydraulics
    • Use: suits the specified application
    • Material: steel body with corrosion protection
    Regular price £15.00 Ex VAT £18.00 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8 BSPP Double Acting Counterbalance Valve For Open Centre 350 Bar - Bolt Fitting - Steel Body
    Regular price £85.19 Ex VAT £102.23 Inc VAT
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    3/8 BSPP Double Acting Counterbalance Valve For Open Centre 350 Bar - Bolt Fitting - Steel Body

    Key Features

    • Type: double acting counterbalance valve for open centre systems
    • Ports: 3/8 BSPP
    • Function: load holding; prevents overrunning loads
    • Modulation: opens with pilot pressure proportional to load
    • Benefit: stable lowering and shock protection
    • Body: steel; serviceable adjuster with lock
    Regular price £85.19 Ex VAT £102.23 Inc VAT
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  • BSPP Double Acting Counterbalance Valve For Open Center upto 350 Bar -  Flanged Version  - Steel Body
    Regular price £72.13 Ex VAT £86.56 Inc VAT
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    BSPP Double Acting Counterbalance Valve For Open Center upto 350 Bar - Flanged Version - Steel Body

    Key Features

    • Type: double acting counterbalance valve for open centre systems
    • Ports: as specified
    • Function: load holding; prevents overrunning loads
    • Modulation: opens with pilot pressure proportional to load
    • Benefit: stable lowering and shock protection
    • Body: steel; serviceable adjuster with lock
    Regular price £72.13 Ex VAT £86.56 Inc VAT
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • BSPP Double Acting Counterbalance Valve for Closed Centre with Steel Body
    Regular price From £82.15 Ex VAT From £98.58 Inc VAT
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    BSPP Double Acting Counterbalance Valve for Closed Centre with Steel Body

    Key Features

    • Type: double acting counterbalance valve for closed centre systems
    • Ports: as specified
    • Function: load holding; prevents overrunning loads
    • Modulation: opens with pilot pressure proportional to load
    • Benefit: stable lowering and shock protection
    • Body: steel; serviceable adjuster with lock
    Regular price From £82.15 Ex VAT From £98.58 Inc VAT
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • BSPP Single Acting Counterbalance Valves for Closed Centre with Steel Body
    Regular price From £48.74 Ex VAT From £58.49 Inc VAT
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    BSPP Single Acting Counterbalance Valves for Closed Centre with Steel Body

    Key Features

    • Type: single acting counterbalance valve for closed centre systems
    • Ports: as specified
    • Function: load holding; prevents overrunning loads
    • Modulation: opens with pilot pressure proportional to load
    • Benefit: stable lowering and shock protection
    • Body: steel; serviceable adjuster with lock
    Regular price From £48.74 Ex VAT From £58.49 Inc VAT
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    • Order by 3pm for Next Day Delivery
  • 1/4 Bonded seal - Approved Hydraulics Limited
    Regular price £0.69 Ex VAT £0.83 Inc VAT
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    1/4 Bonded seal

    Key Features

    • Part number: DOW14
    • Seal type: Bonded seal washer with elastomer insert
    • Size: 1/4 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 £0.69 Ex VAT £0.83 Inc VAT
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    • Order by 3pm for Next Day Delivery
  • 3/4 Bonded seal - Approved Hydraulics Limited
    Regular price £1.25 Ex VAT £1.50 Inc VAT
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    3/4 Bonded seal

    Key Features

    • Part number: DOW34
    • Seal type: Bonded seal washer with elastomer insert
    • Size: 3/4 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; reusable in many service applications
    Regular price £1.25 Ex VAT £1.50 Inc VAT
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1/2" BSP Male x 1 1/4" BSP Male Adaptor - Approved Hydraulics Limited
    Regular price £3.53 Ex VAT £4.24 Inc VAT
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    3/8BSPM - 3/4BSPM Ad

    Key Features

    • Type: hydraulic fitting
    • Threads: 3/8 to 3/4 thread
    • Material: plated carbon steel
    • Use: connect hydraulic components
    • Standard: BSP and related port forms as specified
    Regular price £3.53 Ex VAT £4.24 Inc VAT
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8" BSP Male x 1/2" BSP Male Adaptor - Approved Hydraulics Limited
    Regular price £4.05 Ex VAT £4.86 Inc VAT
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    3/4 BSP x 3/4 BSP M/M Ad

    Key Features

    • Type: hydraulic fitting
    • Threads: 3/4 to 3/4 thread
    • Material: plated carbon steel
    • Use: connect hydraulic components
    • Standard: BSP and related port forms as specified
    Regular price £4.05 Ex VAT £4.86 Inc VAT
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Double cross relief valve 60L 1/2 BSPP 210 bar - steel body for OMP or OMR Hydraulic motors - Approved Hydraulics Limited
    Regular price £47.34 Ex VAT £56.81 Inc VAT
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    Double cross relief valve 60L 1/2 BSPP 210 bar - steel body for OMP or OMR Hydraulic motors

    Key Features

    • Type: double cross-line relief valve for hydraulic motors
    • Ports: 1/2 BSPP
    • Flow rating: per model
    • Max pressure: 210 bar
    • Compatibility: direct fit for Danfoss OMP/OMR style motors
    • Function: protects motor from shock and overpressure on both A/B lines
    • Body: steel; zinc plated
    Regular price £47.34 Ex VAT £56.81 Inc VAT
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    • Order by 3pm for Next Day Delivery
  • BSPP Hose Burst Valve - Approved Hydraulics Limited
    Regular price From £3.01 Ex VAT From £3.62 Inc VAT
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    BSPP Hose Burst Valve

    Key Features

    • Type: hose burst safety valve (velocity fuse)
    • Ports: as specified
    • Normal state: free flow; closes rapidly on excess flow
    • Function: locks load if a hose fails to prevent runaway
    • Reset: reopens after pressure equalisation/service procedure
    • Use: safety on booms; platforms; lifting cylinders
    Regular price From £3.01 Ex VAT From £3.62 Inc VAT
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • BSPP Double Acting Counterbalance Valve for Open Centre with Steel Body - Approved Hydraulics Limited
    Regular price From £66.95 Ex VAT From £80.35 Inc VAT
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    • Delivery to UK & Ireland

    BSPP Double Acting Counterbalance Valve for Open Centre with Steel Body

    Key Features

    • Type: double acting counterbalance valve for open centre systems
    • Ports: as specified
    • Function: load holding; prevents overrunning loads
    • Modulation: opens with pilot pressure proportional to load
    • Benefit: stable lowering and shock protection
    • Body: steel; serviceable adjuster with lock
    Regular price From £66.95 Ex VAT From £80.35 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Tamper proof cap M10 - RED color - Approved Hydraulics Limited
    Regular price £1.16 Ex VAT £1.40 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland

    Tamper proof cap M10 - RED color

    Key Features

    • Type: tamper-proof cap for valve adjusters
    • Thread: M10
    • Colour: red for quick identification
    • Function: prevents unauthorised adjustment
    • Material: durable polymer or plated steel per variant
    Regular price £1.16 Ex VAT £1.40 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8 BSPP Sequence Valve - 40 L/Min - 70/350 Bar - Steel Body
    Regular price From £41.45 Ex VAT From £49.74 Inc VAT
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    3/8 BSPP Sequence Valve - 40 L/Min - 70/350 Bar - Steel Body

    Key Features

    • Type: line-mounted sequence valve for staged actuation
    • Ports: 3/8 BSPP
    • Flow rating: 40 L/min
    • Pressure range: 70–350 bar adjustable
    • Operation: direct acting; fully balanced poppet design
    • Body: steel body for durability
    • Use: start secondary function only after primary reaches set pressure
    Regular price From £41.45 Ex VAT From £49.74 Inc VAT
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    • Order by 3pm for Next Day Delivery
  • 1/2 BSPP Three-Way Flow Control Valve - Pressure Compensated - Exceending Flow To Pressure - Approved Hydraulics Limited
    Regular price £136.80 Ex VAT £164.16 Inc VAT
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    1/2 BSPP Three-Way Flow Control Valve - Pressure Compensated - Exceending Flow To Pressure

    Key Features

    • Type: straight adaptor (BSP threading per title)
    • Threads: 1/2 thread
    • 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 £136.80 Ex VAT £164.16 Inc VAT
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • BSPP 3 Ports High Pressure Ball Valve - Approved Hydraulics Limited
    Regular price From £33.45 Ex VAT From £40.14 Inc VAT
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    BSPP 3 Ports High Pressure Ball Valve

    Key Features

    • Type: straight adaptor (BSP threading per title)
    • Threads: as specified
    • 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 From £33.45 Ex VAT From £40.14 Inc VAT
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Hydra Part CETOP 5 Pilot Operated Relief Valve Module - A&B to T (Z-2-PB-10-VC-1-315) - Approved Hydraulics
    Regular price £109.68 Ex VAT £131.62 Inc VAT
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    CETOP 5 Pilot Operated Relief Valve Module - A&B to T (Z-2-PB-10-VC-1-315)

    Key Features

    • Interface: iso 4401-05 cetop 5 ng10
    • Function: pilot operated relief a and b to t
    • Max operating pressure: 315 bar
    • Max flow: 100 l/min
    • Temp range: -20 c to +70 c
    • Weight: 3.1 kg
    • Channels: a ; b ; a+b vc option
    Regular price £109.68 Ex VAT £131.62 Inc VAT
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  • Hydra Part CETOP 5 Pressure Relief Valve Module - P to T (ZPB-10-VP-1-315) - Approved Hydraulics
    Regular price £85.09 Ex VAT £102.11 Inc VAT
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    CETOP 5 Pressure Relief Valve Module - P to T (ZPB-10-VP-1-315)

    Key Features

    • Interface: iso 4401-05 cetop 5 ng10
    • Function: pilot operated pressure relief p to t
    • Max operating pressure: 315 bar
    • Max flow: 100 l/min
    • Temp range: -20 c to +70 c
    • Weight: 2.6 kg
    • Typical use: system relief on cetop 5 stacks
    Regular price £85.09 Ex VAT £102.11 Inc VAT
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    • Order by 3pm for Next Day Delivery
  • 3/8" BSPT Tapered x 3/8" BSPT Tapered - Approved Hydraulics Limited
    Regular price £3.00 Ex VAT £3.61 Inc VAT
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    1/2 BSPT x 1/2 BSPT Tapered Adaptor

    Key Features

    • Type: adaptor converting parallel to tapered port standards
    • Threads: 1/2 to 1/2 thread
    • Standards: BSPP parallel and BSPT taper as applicable
    • Sealing: taper threads with sealant; parallel with washer/bonded seal
    • Use: connect BSPP components to BSPT ports or vice versa
    Regular price £3.00 Ex VAT £3.61 Inc VAT
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/4" BSP x 3/4" BSP Bulkhead Adaptor with Locknut - Approved Hydraulics Limited
    Regular price £3.09 Ex VAT £3.71 Inc VAT
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    1/4 BSP Bulk Head Adaptors (Supplied without nut)

    Key Features

    • Type: straight thread adaptor
    • Threads: 1/4 thread
    • Standard: BSPP parallel unless specified otherwise
    • Material: plated carbon steel
    • Use: join hoses; valves; or adapt port sizes
    Regular price £3.09 Ex VAT £3.71 Inc VAT
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery

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.