• Coil for Solenoid Valve 22W 24vDC - Approved Hydraulics Limited
    Regular price £9.16
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    Coil for Solenoid Valve 22W 24vDC

    Key Features

    • Type: wet-armature solenoid coil for hydraulic valves
    • Power: 22 W
    • Voltage: 24 V DC
    • Connector: DIN 43650-A plug compatible
    • Protection: IP65 with mated connector
    • Duty cycle: continuous service
    Regular price £9.16
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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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  • 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 Bonded seal - Approved Hydraulics Limited
    Regular price £0.92
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    3/8 Bonded seal

    Key Features

    • Type: bonded sealing washer
    • Size: per selection
    • Construction: elastomeric sealing element bonded to metal washer
    • Use: high pressure face sealing on parallel threads/ports
    • Benefit: reliable leak-tight joint under vibration
    Regular price £0.92
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  • ADMISSION CONNECTOR 1 1/4'' PIPE 2'' ELBOW
    Regular price £49.19
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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 £49.19
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  • Out of Stock
    Allison PTO Pressure Switch
    Regular price £53.76
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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 £53.76
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  • Support for ABER ABCD Cab Control Units
    Regular price £19.93
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    Support for ABER ABCD Cab Control Units

    Key Features

    • Component: support bracket for ABCD pattern
    • Material: steel fabrication
    • Finish: protective coating for corrosion resistance
    • Mounting: drilled interface per ABCD dimensions
    • Use: supports ancillary equipment or guards
    Regular price £19.93
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  • ABER B2 Gear Pumps
    Regular price From £239.36
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    ABER B2 Gear Pumps

    Key Features

    • Displacement: ~8–39 cm³/rev
    • Max pressure: up to 250–300 bar (model dependent)
    • Mount: UNI 3-bolt (European standard)
    • Rotation: CW or CCW (bi-rotational options)
    • Shaft: 6-spline
    • Ports: BSP threaded (3/4"–1")
    • Application: light/medium-duty mobile hydraulics
    Regular price From £239.36
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  • ABER Bent Axis Piston Pumps - Approved Hydraulics Limited
    Regular price From £545.51
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    ABER Bent Axis Piston Pumps

    Key Features

    • Displacement range: ~17–172 cm³/rev (series dependent)
    • Max working pressure: up to 350 bar (400 bar peak)
    • Efficiency/noise: high volumetric efficiency; low noise
    • Rotation: reversible (CW/CCW options)
    • Mounting: PTO direct-mount for truck hydraulics
    • Flange/shaft: 4-bolt, 8-tooth spline (DIN 5482 style)
    • Typical use: tippers, cranes, high-pressure mobile hydraulics
    • Lubrication: case drain required
    Regular price From £545.51
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  • Out of Stock
    Scanreco 3 Pon spring return toggle switch
    Regular price £43.31
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    Scanreco 3 Pon spring return toggle switch

    Key Features

    • Type: 3 position spring return toggle switch
    • Action: momentary ; returns to center
    • Seal: rubber gaiter for dust ; splash resistance
    • Rating: suitable for 12 ; 24 vdc control circuits
    • Use: jog functions or momentary commands
    Regular price £43.31
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  • Scanreco Battery Charger 10-30VDC Type 437 For Battery 593 only.
    Regular price £327.88
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    Scanreco Battery Charger 10-30VDC Type 437 For Battery 593 only.

    Key Features

    • Type: battery charger type 437
    • Supply: 10 to 30 vdc vehicle input
    • Battery: for type 593 nimh cassette packs only
    • Compatibility: not for 592 ; 590 families
    • Use: in vehicle charging for scanreco transmitters
    Regular price £327.88
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  • Scanreco Receiver Unit G2B PWM A+B Type 3010  (Without Wiring) Includes Antenna
    Regular price £1,789.20
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    Scanreco Receiver Unit G2B PWM A+B Type 3010 (Without Wiring) Includes Antenna

    Key Features

    • Type: RC400 G2B receiver type 3010
    • Outputs: PWM A plus B proportional channels
    • Interface: harness for valve control including PVG32 options
    • Supply: 12 to 24 vdc
    • Enclosure: industrial receiver unit for mobile hydraulics
    • Use: proportional control of hydraulic valves
    Regular price £1,789.20
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  • Scanreco Filter Element - Approved Hydraulics Limited
    Regular price £39.90
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    Scanreco Filter Element

    Key Features

    • Type: replacement filter element
    • Fit: scanreco filter housing for servo ; hydraulic circuit
    • Micron rating: per element specification
    • Service: planned maintenance part
    • Use: restore filtration performance
    Regular price £39.90
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  • Scanreco Remote Control Blanking Plate - Approved Hydraulics Limited
    Regular price £21.46
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    Scanreco Remote Control Blanking Plate

    Key Features

    • Notes: Original Scanreco Product
    • Use case: Blanking cover plate for unused mounting/connector on Scanreco remote control
    • Brand: Scanreco
    • Notes: Specification information is limited in source listing; confirm dimensions and compatibility before purchase
    • Notes: Details not stated
    Regular price £21.46
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  • Scanreco Control Unit Programming Cable (5m)
    Regular price £118.36
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    Scanreco Control Unit Programming Cable (5m)

    Key Features

    • Type: control unit programming cable
    • Length: 5 m
    • Connector: dedicated programming connector
    • Compatibility: RC400 control units
    • Use: configure receiver and system parameters
    Regular price £118.36
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  • CETOP 3 Steel Manifold with Relief Cavity - P&T 1/2" - A&B 3/8"
    Regular price From £42.97
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    CETOP 3 Steel Manifold with Relief Cavity - P&T 1/2" - A&B 3/8"

    Key Features

    • Standard: cetop 3 ; iso 4401-03 ; din 24340
    • Ports: p ; t 1/2" bspp ; a ; b 3/8" bspp
    • Relief cavity: main pressure relief cavity provided ; blanking plug when no cartridge
    • Max working pressure: 315 bar
    • Circuit: parallel
    • Stations: 1 ; 2 ; 3 ; 4 ; 5 ; 6 options
    • Material: steel
    • Use: mounting of ng6 directional valves on mini power packs ; manifolds
    Regular price From £42.97
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  • Mini Radio Remote Control 2 Button For Double  Acting Operation 12-24VDC
    Regular price £103.55
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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 £103.55
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  • Mini Radio Remote Control 2 Button For Single Acting Operation 12-24VDC - Approved Hydraulics Limited
    Regular price £103.55
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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 £103.55
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  • 12V DC Coil-22W-13mm hole-39mm long for  45 - 50L - 80L-90L-100L-150L Unloader Valve
    Regular price £24.48
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    12V DC Coil-22W-13mm hole-39mm long for 45 - 50L - 80L-90L-100L-150L Unloader Valve

    Key Features

    • Voltage: 12 vdc
    • Power: 22 w
    • Bore: 13 mm through-hole
    • Body length: 39 mm
    • Duty: 100% ed
    • Use: unloader valve actuation
    Regular price £24.48
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  • 24V DC Coil-22W-13mm hole-39mm long for  45 - 50L - 80L-90L-100L-150L Unloader Valve
    Regular price £26.11
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    24V DC Coil-22W-13mm hole-39mm long for 45 - 50L - 80L-90L-100L-150L Unloader Valve

    Key Features

    • Voltage: 24 vdc
    • Power: 22 w
    • Bore: 13 mm through-hole
    • Body length: 39 mm
    • Duty: 100% ed
    • Use: unloader valve actuation
    Regular price £26.11
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  • 12vDC Coil For Z50 valve 16.3mm Hole x 50mm Long - Approved Hydraulics Limited
    Regular price £24.72
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    12vDC Coil For Z50 valve 16.3mm Hole x 50mm Long

    Key Features

    • Voltage: 12 vdc
    • Bore: 16.3 mm through-hole
    • Body length: 50 mm
    • Duty: 100% ed continuous
    • Connection: din plug style
    • Use: z50 solenoid valves
    Regular price £24.72
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  • 12VDC Coil For Z80 Valve 22mm Hole x 54mm Long - Approved Hydraulics Limited
    Regular price £34.88
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    12VDC Coil For Z80 Valve 22mm Hole x 54mm Long

    Key Features

    • Voltage: 12 vdc
    • Bore: 22 mm
    • Length: 54 mm
    • Use: z80 sectional valve coils
    • Connector: din plug
    Regular price £34.88
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  • 24VDC Coil For Z80 Valve 22mm Hole x 54mm Long
    Regular price £34.88
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    24VDC Coil For Z80 Valve 22mm Hole x 54mm Long

    Key Features

    • Voltage: 24 vdc
    • Bore: 22 mm
    • Length: 54 mm
    • Use: z80 sectional valve coils
    • Connector: din plug
    Regular price £34.88
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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.