• Steel Square Vertical Hydraulic Tank 123mm (AC) Neck Flange (Vertical & Horizontal) - Approved Hydraulics Limited
    Regular price From £45.93 Ex VAT From £55.12 Inc VAT
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    Steel Square Vertical Hydraulic Tank 123mm (AC) Neck Flange (Vertical & Horizontal)

    Key Features

    • Material: steel
    • Neck flange: 123 mm ac
    • Orientation: vertical ; horizontal use
    • Use: reservoir for ac mini power packs
    • Compatibility: 123 mm filler ; breather ; central manifold
    Regular price From £45.93 Ex VAT From £55.12 Inc VAT
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  • Mini Radio Remote Control 2 Button For Double  Acting Operation 12-24VDC - Approved Hydraulics Limited
    Regular price £86.29 Ex VAT £103.55 Inc VAT
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    Mini Radio Remote Control 2 Button For Double Acting Operation 12-24VDC

    Key Features

    • Control: double acting operation
    • Buttons: 2
    • Supply: 12 vdc ; 24 vdc
    • Interface: radio wireless control
    • Use: remote actuation of mini power packs ; tipper ; liftgate ; winch circuits
    Regular price £86.29 Ex VAT £103.55 Inc VAT
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  • Mini Radio Remote Control 2 Button For Single Acting Operation 12-24VDC - Approved Hydraulics Limited
    Regular price £86.29 Ex VAT £103.55 Inc VAT
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    Mini Radio Remote Control 2 Button For Single Acting Operation 12-24VDC

    Key Features

    • Mode: single acting operation
    • Buttons: 2
    • Supply: 12 ; 24 vdc
    • Use: compact wireless control
    • Application: hydraulic component
    Regular price £86.29 Ex VAT £103.55 Inc VAT
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  • Filler Breather - Approved Hydraulics Limited
    Regular price £40.00 Ex VAT £48.00 Inc VAT
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    Filler Breather

    Key Features

    • Function: vent ; filter air for hydraulic reservoir
    • Interface: flange mount options ; e.g. 83 mm 6 hole pattern
    • Element: replaceable breather element
    • Use: prevents contamination ; equalises tank pressure
    • Application: hydraulic component
    Regular price £40.00 Ex VAT £48.00 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.

  • Electro Pneumatic 3/2 valve (N/O) without coil for 8EP3 for direct into cylinder kit (G-S) - Approved Hydraulics Limited
    Regular price £12.48 Ex VAT £14.98 Inc VAT
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    Electro Pneumatic 3/2 valve (N/O) without coil for 8EP3 for direct into cylinder kit (G-S)

    Key Features

    • Voltage: 12 vdc
    • Power: 3 w rating
    • Hole: 9 mm through-bore
    • Body length: 30 mm
    • Ingress protection: IP65
    • Duty: 100% ed
    • Use: electro-pneumatic 8EP3/8EP4 valves
    Regular price £12.48 Ex VAT £14.98 Inc VAT
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  • M5 x 130 Cap head bolt - Approved Hydraulics Limited
    Regular price £3.05 Ex VAT £3.66 Inc VAT
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    M5 x 130 Cap head bolt

    Key Features

    • Fastener type: socket cap screw
    • Thread: metric M5
    • Length: 130 mm
    • Drive: internal hex for controlled tightening
    • Use: hydraulic brackets; manifolds; guards
    Regular price £3.05 Ex VAT £3.66 Inc VAT
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  • 80L Control Valve Standard Lever Box (Excluding Lever) - Approved Hydraulics Limited
    Regular price £12.41 Ex VAT £14.90 Inc VAT
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    80L Control Valve Standard Lever Box (Excluding Lever)

    Key Features

    • Series: 80L GS sectional control valve
    • Actuator: manual lever box
    • Interface: lever M10 thread input
    • Use: mechanical actuation of spool
    • Compatibility: Hydra Part GS family ; alternative to Walvoil SD series in same size
    Regular price £12.41 Ex VAT £14.90 Inc VAT
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  • 90L Monobloc Valve High pressure carry over plug 1/2" - Approved Hydraulics Limited
    Regular price £17.00 Ex VAT £20.41 Inc VAT
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    90L Monobloc Valve High pressure carry over plug 1/2"

    Key Features

    • Function: high pressure carry over ; power beyond
    • Thread: 1/2" bsp
    • Compatibility: 90l monoblock valves
    • Use case: cascade 2nd control valve downstream
    • System rating: for systems operating to 315 bar with host valve
    Regular price £17.00 Ex VAT £20.41 Inc VAT
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  • 2" BSP Male-Male Adaptor - Approved Hydraulics Limited
    Regular price £48.16 Ex VAT £57.80 Inc VAT
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    2" BSP Male-Male Adaptor

    Key Features

    • Type: Male to male BSP adaptor
    • Thread size: 2" BSPP or BSPT depending on variant
    • Material: Steel or brass per build
    • Standards: Threads to BS EN ISO 228 ; DIN 3852 form A
    • Use: Join two female BSP ports ; hose or manifold interface
    Regular price £48.16 Ex VAT £57.80 Inc VAT
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  • JS200/2 Cable Operated Joystick
    Regular price £101.18 Ex VAT £121.42 Inc VAT
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    JS200/2 Cable Operated Joystick

    Key Features

    • Type: Cable operated remote control joystick
    • Model: JS200/2
    • Control: Single lever controls two spools via cables
    • Buttons: Up to 6 auxiliary push buttons possible
    • Ingress: IP40 class typical
    • Applications: Brush cutters ; loaders ; balers ; mixers
    Regular price £101.18 Ex VAT £121.42 Inc VAT
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  • 1/2" Port, Straight, 40mm PCD, Female Gear Pump Adaptors
    Regular price £5.20 Ex VAT £6.25 Inc VAT
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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 £5.20 Ex VAT £6.25 Inc VAT
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  • 1/2" Port, 90°, 3 Hole, 30mm PCD, Female Gear Pump Adaptors - Approved Hydraulics Limited
    Regular price £5.73 Ex VAT £6.88 Inc VAT
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    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 £5.73 Ex VAT £6.88 Inc VAT
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  • Out of Stock
    HP-LVDT-DIN Double Pilot Check Valves - Approved Hydraulics Limited
    Regular price From £30.20 Ex VAT From £36.24 Inc VAT
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    HP-LVDT-DIN Double Pilot Check Valves

    Key Features

    • Type: double pilot operated check valve
    • Threads: BSP
    • Function: locks load until pilot pressure releases checks
    • Use: load holding on cylinders and top links
    • Pressure: 315 to 350 bar class
    Regular price From £30.20 Ex VAT From £36.24 Inc VAT
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  • Hydra Part 100mm Glycerine Hydraulic Pressure Gauge 0-1400 Psi (100 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 0-1400 Psi (100 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: 0-1400 psi ( 100 bar )
    • Intended use: visual pressure readout on hydraulic circuits
    Regular price £18.91 Ex VAT £22.70 Inc VAT
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  • Hydra Part 3/4" 3 Port Pressure Compensating Flow Control with bypass to line - Approved Hydraulics
    Regular price £247.74 Ex VAT £297.29 Inc VAT
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    3/4" 3 Port Pressure Compensating Flow Control with bypass to line

    Key Features

    • Function: 3 way pressure compensated with bypass to pressure line
    • Max inlet flow: 120 l/min
    • Max adjusted flow: 100 l/min
    • Max pressure: 350 bar
    • Use: priority flow to circuit ; bypass maintains line pressurised
    Regular price £247.74 Ex VAT £297.29 Inc VAT
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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 £61.75 Ex VAT From £74.11 Inc VAT
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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 £61.75 Ex VAT From £74.11 Inc VAT
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  • 1/2 Bonded seal - Approved Hydraulics Limited
    Regular price £0.65 Ex VAT £0.78 Inc VAT
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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 £0.65 Ex VAT £0.78 Inc VAT
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  • 3/8" BSP Male x 1/2" BSP Male Adaptor - Approved Hydraulics Limited
    Regular price £2.60 Ex VAT £3.13 Inc VAT
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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 £2.60 Ex VAT £3.13 Inc VAT
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  • 1/2" BSP Male x 3/8" BSP Fixed Female Extended Adaptor - Approved Hydraulics Limited
    Regular price £2.49 Ex VAT £2.99 Inc VAT
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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 £2.49 Ex VAT £2.99 Inc VAT
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  • Hydra Part CETOP 5 Double Solenoid Control Valve NG10, A & B to T - P Blocked - Approved Hydraulics
    Regular price From £95.21 Ex VAT From £114.26 Inc VAT
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    CETOP 5 Double Solenoid Control Valve NG10, A & B to T - P Blocked

    Key Features

    • Centre spool: a and b to t ; p blocked
    • 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 £95.21 Ex VAT From £114.26 Inc VAT
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  • 1/2" BSP Male x 1/2" BSP Female Swivel Adaptor - Approved Hydraulics Limited
    Regular price £6.00 Ex VAT £7.21 Inc VAT
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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 £6.00 Ex VAT £7.21 Inc VAT
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  • 3/4" BSP Female Swivel x 3/4" BSP Female Swivel - Approved Hydraulics Limited
    Regular price £6.09 Ex VAT £7.31 Inc VAT
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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 £6.09 Ex VAT £7.31 Inc VAT
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  • 1/2" BSP Male x 1/2" BSPT Tapered Adaptor - Approved Hydraulics Limited
    Regular price £3.33 Ex VAT £4.00 Inc VAT
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    3/8" BSP Male x 3/8" BSPT Tapered Adaptor

    Key Features

    • Type: parallel-to-taper adaptor for BSP connections
    • Standards: BSPP (ISO 228) to BSPT (ISO 7) depending on ends
    • Threads: 3/8 to 3/8 BSP
    • Sealing: taper thread seals with thread sealant; parallel with washer/bonded seal
    • Use: connect tapered ports to parallel hose/valve fittings
    Regular price £3.33 Ex VAT £4.00 Inc VAT
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  • 3/8" BSP Male x 1/2" BSP Male Adaptor - Approved Hydraulics Limited
    Regular price £5.65 Ex VAT £6.78 Inc VAT
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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 £5.65 Ex VAT £6.78 Inc VAT
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    • 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.