• Hydra Part SV80 Sequence Valve 3/4" Bsp - 80Lpm - 100-350 Bar - Approved Hydraulics
    Regular price £75.51 Ex VAT £90.62 Inc VAT
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    SV80 Sequence Valve 3/4" Bsp - 80Lpm - 100-350 Bar

    Key Features

    • Type: hydraulic sequence valve ; direct acting
    • Port size: 3/4" bsp
    • Rated flow: 80 lpm
    • Pressure setting: 100 to 350 bar
    • Function: opens secondary circuit after set pressure reached
    • Mounting: in line
    • Applications: dual actuator sequencing ; clamp then work
    Regular price £75.51 Ex VAT £90.62 Inc VAT
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  • Out of Stock
    Hydra Part Inline Pressure Relief Valve 1 1/4" Bsp 150Lpm 350 Bar Max - Approved Hydraulics
    Regular price £145.25 Ex VAT £174.31 Inc VAT
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    Inline Pressure Relief Valve 1 1/4" Bsp 150Lpm 350 Bar Max

    Key Features

    • Type: inline pressure relief valve
    • Port size: 1 1/4" bsp
    • Max flow: 150 lpm
    • Set pressure range: up to 350 bar
    • Adjustment: screw ; locknut
    • Function: overpressure protection ; bypass to tank when set pressure reached
    • Mounting: in line
    • Typical applications: pump protection ; circuit safety ; mobile hydraulics
    Regular price £145.25 Ex VAT £174.31 Inc VAT
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    • Order by 3pm for Next Day Delivery
  • Hydra Part 100mm Glycerine Hydraulic Pressure Gauge 0-2300 Psi (160 Bar) 1/2" Rear Entry - Approved Hydraulics
    Regular price £18.91 Ex VAT £22.70 Inc VAT
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    100mm Glycerine Hydraulic Pressure Gauge 0-2300 Psi (160 Bar) 1/2" Rear Entry

    Key Features

    • Dial: 100 mm
    • Filling: glycerine filled
    • Entry: 1/2\" bsp rear entry
    • Scale: psi ; bar dual scale
    • Casing: stainless steel
    • Pressure range: 0-2300 psi ( 160 bar )
    • Intended use: visual pressure readout on hydraulic circuits
    Regular price £18.91 Ex VAT £22.70 Inc VAT
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    • Order by 3pm for Next Day Delivery
  • BSPP Double Acting Pilot Check Valve - Flanged Version - Approved Hydraulics Limited
    Regular price From £42.65 Ex VAT From £51.19 Inc VAT
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    BSPP Double Acting Pilot Check Valve - Flanged Version

    Key Features

    • Type: double acting pilot operated check valve
    • Ports: as specified
    • Function: locks actuator in both directions until pilot pressure opens
    • Benefit: load holding with controlled release
    • Use: cylinders that must hold position under load
    Regular price From £42.65 Ex VAT From £51.19 Inc VAT
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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.

  • BSPP Relief Valve upto 50 L/min - Steel Body - Approved Hydraulics Limited
    Regular price From £30.98 Ex VAT From £37.18 Inc VAT
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    BSPP Relief Valve upto 50 L/min - Steel Body

    Key Features

    • Type: hydraulic component
    • Design: built for mobile hydraulic service
    • Use: as specified by product title
    • Body: corrosion protected steel or aluminium per model
    Regular price From £30.98 Ex VAT From £37.18 Inc VAT
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  • BSPP One Way Flow Control Valve - Barrel Type - Approved Hydraulics Limited
    Regular price From £19.88 Ex VAT From £23.86 Inc VAT
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    BSPP One Way Flow Control Valve - Barrel Type

    Key Features

    • Type: one-way flow control (throttle/check)
    • Ports: as specified
    • Function: free flow one direction; metered flow opposite via needle
    • Body: barrel pattern for in-line mounting
    • Use: control extend or retract speed on cylinders
    Regular price From £19.88 Ex VAT From £23.86 Inc VAT
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  • 3/8 BSPP bi-directional flow control valve - Approved Hydraulics Limited
    Regular price £36.89 Ex VAT £44.27 Inc VAT
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    3/4" BSPP Bi-directional Flow Control Valve

    Key Features

    • Type: bi-directional flow control valve
    • Ports: 3/4 BSPP
    • Control: meters flow in both directions for consistent actuator speed
    • Adjustment: fine thread needle/knob for repeatable settings
    • Use: speed control of motors or cylinders under varying load
    Regular price £36.89 Ex VAT £44.27 Inc VAT
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  • 3/8 BSPP bi-directional flow control valve - Approved Hydraulics Limited
    Regular price £48.13 Ex VAT £57.76 Inc VAT
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    1" BSPP Bi-directional Flow Control Valve

    Key Features

    • Type: bi-directional flow control valve
    • Ports: 1 BSPP
    • Control: meters flow in both directions for consistent actuator speed
    • Adjustment: fine thread needle/knob for repeatable settings
    • Use: speed control of motors or cylinders under varying load
    Regular price £48.13 Ex VAT £57.76 Inc VAT
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  • 2 Port Manifold For SAE8/2 Cartridge 1/4” 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 1/4” 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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  • 3/8 BSPP Insert Check Valve Ball Type - Cracking Pressure 0.5 Bar
    Regular price £4.09 Ex VAT £4.91 Inc VAT
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    3/8 BSPP Insert Check Valve Ball 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 £4.09 Ex VAT £4.91 Inc VAT
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  • 3/8 BSPP Male Connection Poppet Check Valve -  Cracking Pressure 0.5 Bar - Approved Hydraulics Limited
    Regular price £6.81 Ex VAT £8.18 Inc VAT
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    3/8 BSPP Male Connection Poppet Check Valve - 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 £6.81 Ex VAT £8.18 Inc VAT
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1/2" BSP Male x 1/2" BSP Female Swivel Adaptor - Approved Hydraulics Limited
    Regular price £4.49 Ex VAT £5.39 Inc VAT
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    1/4 BSP Male x 3/8 BSP Swivel Female

    Key Features

    • Type: hydraulic fitting
    • Threads: 1/4 to 3/8 thread
    • Material: plated carbon steel
    • Use: connect hydraulic components
    • Standard: BSP and related port forms as specified
    Regular price £4.49 Ex VAT £5.39 Inc VAT
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  • 3/4 BSPP Relief Valve - 80 l/min - 50/350 bar - Steel Body - Approved Hydraulics Limited
    Regular price £40.54 Ex VAT £48.65 Inc VAT
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    3/4 BSPP Relief Valve - 80 l/min - 50/350 bar - Steel Body

    Key Features

    • Type: pressure relief valve; direct line mounting
    • Ports: 3/4 BSPP
    • Max flow: 80 L/min
    • Adjustable range: 50–350 bar
    • Function: protects circuit by limiting pressure to setpoint
    • Body: steel with corrosion-resistant plating
    Regular price £40.54 Ex VAT £48.65 Inc VAT
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  • Donaldson Hydraulic Return Filter Cartridge 25 Micron - Approved Hydraulics Limited
    Regular price £18.40 Ex VAT £22.09 Inc VAT
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    Donaldson Hydraulic Return Filter Cartridge 25 Micron

    Key Features

    • Type: hydraulic return filter element
    • Rating: 25 micron filtration class
    • Media: cellulose or synthetic media options
    • Use: protect system from contamination on return line
    • Compatibility: fits designated filter head family
    Regular price £18.40 Ex VAT £22.09 Inc VAT
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  • Hydra Part CETOP 3 Pressure Reducing Module Valve - B to T (ZPR-6-D-B-1-30-210YM) - Approved Hydraulics
    Regular price £77.79 Ex VAT £93.35 Inc VAT
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    CETOP 3 Pressure Reducing Module Valve - B to T (ZPR-6-D-B-1-30-210YM)

    Key Features

    • Interface: iso 4401-03 cetop 3 ng06
    • Type: 3 way direct operated pressure reducing
    • Reduced port: b to t
    • Primary pressure: max 315 bar
    • Secondary pressure: 210 bar
    • Max flow: 30 l/min
    • Use: branch pressure trimming on one work port
    Regular price £77.79 Ex VAT £93.35 Inc VAT
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  • Hydra Part CETOP 3 Pressure Reducing Module - A to T (ZPR-6-D-A-1-30-210YM) - Approved Hydraulics
    Regular price £66.24 Ex VAT £79.49 Inc VAT
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    CETOP 3 Pressure Reducing Module - A to T (ZPR-6-D-A-1-30-210YM)

    Key Features

    • Interface: iso 4401-03 cetop 3 ng06
    • Type: 3 way direct operated pressure reducing
    • Reduced port: a to t
    • Primary pressure: max 315 bar
    • Secondary pressure: 210 bar
    • Max flow: 30 l/min
    • Use: branch pressure trimming on one work port
    Regular price £66.24 Ex VAT £79.49 Inc VAT
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    • Order by 3pm for Next Day Delivery
  • Hydra Part CETOP 3 Pilot Operated Relief Valve Module - (Z-2-PB-6-VC-1-315) - Approved Hydraulics
    Regular price £121.51 Ex VAT £145.82 Inc VAT
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    CETOP 3 Pilot Operated Relief Valve Module - (Z-2-PB-6-VC-1-315)

    Key Features

    • Interface: iso 4401-03 cetop 3 ng06
    • Function: pilot operated relief a and b to t
    • Max operating pressure: 315 bar
    • Max flow: 60 l/min
    • Temp range: -20 c to +70 c
    • Weight: 1.9 kg
    • Channels: a ; b ; a+b vc options
    Regular price £121.51 Ex VAT £145.82 Inc VAT
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  • Hydra Part CETOP 5 single solenoid control valve NG10 All ports connected to X - Approved Hydraulics
    Regular price From £75.04 Ex VAT From £90.05 Inc VAT
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    CETOP 5 single solenoid control valve NG10 All ports connected to X

    Key Features

    • Centre spool: all ports connected to x
    • Solenoid: single solenoid
    • Interface: iso 4401-05 cetop 5 ng10
    • Max flow: 120 lpm
    • Max pressure: p ; a ; b 315 bar
    • Coils: 12 vdc ; 24 vdc ; 110 vac 50hz ; 220 vac 50hz
    • Ingress protection: ip65
    • Connector: din plug with led
    • Manual override: standard on all valves
    Regular price From £75.04 Ex VAT From £90.05 Inc VAT
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  • 3/8" BSP Female Blanking Plug - Approved Hydraulics Limited
    Regular price £9.40 Ex VAT £11.29 Inc VAT
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    1" BSP Female Blanking Cap

    Key Features

    • Type: port blanking component
    • Thread: 1 BSP
    • Seal: washer or O-ring depending on seat style
    • Material: plated carbon steel
    • Use: temporary or permanent closure of ports
    Regular price £9.40 Ex VAT £11.29 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 £28.05 Ex VAT £33.66 Inc VAT
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    1" BSP x 1" BSP Bulkhead with Locknut

    Key Features

    • Type: bulkhead adaptor for pass-through mounting
    • Threads: 1 to 1 thread
    • Hardware: supplied with locknut or ring as applicable
    • Material: plated carbon steel
    • Use: secure hose or pipe through panels or tanks
    Regular price £28.05 Ex VAT £33.66 Inc VAT
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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 £10.05 Ex VAT £12.06 Inc VAT
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    3/4" BSP Male x 1/2" BSP Female Swivel Adaptor

    Key Features

    • Type: swivel adaptor
    • Threads: 3/4 to 1/2 thread
    • Swivel: captive nut allows orientation during tightening
    • Seal: flat face or cone seat per variant
    • Use: connect hoses where rotation is restricted
    Regular price £10.05 Ex VAT £12.06 Inc VAT
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8" BSP Female Blanking Plug - Approved Hydraulics Limited
    Regular price £7.29 Ex VAT £8.75 Inc VAT
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    3/8" BSP Female Blanking Plug

    Key Features

    • Type: port blanking component
    • Thread: 3/8 BSP
    • Seal: washer or O-ring depending on seat style
    • Material: plated carbon steel
    • Use: temporary or permanent closure of ports
    Regular price £7.29 Ex VAT £8.75 Inc VAT
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1/4" BSP Male for Bonded Seal x 1/4" BSP Female Swivel 90° Compact Elbow - Approved Hydraulics Limited
    Regular price £16.60 Ex VAT £19.93 Inc VAT
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    3/8" BSP Male for Bonded Seal x 1/4" BSP Female Swivel 90° Compact Elbow

    Key Features

    • Type: swivel adaptor female to female
    • Threads: 3/8 to 1/4 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 £16.60 Ex VAT £19.93 Inc VAT
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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 £8.09 Ex VAT £9.71 Inc VAT
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    5/8" BSP Male x 1/2" BSP Female Swivel Adaptor

    Key Features

    • Type: swivel adaptor female to female
    • Threads: 5/8 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 £8.09 Ex VAT £9.71 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.