• 10 Metre Scanreco Control Cable (5 Pin) - Approved Hydraulics Limited
    Regular price £211.01
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    10 Metre Scanreco Control Cable (5 Pin)

    Key Features

    • Type: receiver control cable
    • Interface: 5 pin connector
    • Length: 10 m
    • Sheath: industrial grade jacket with strain relief
    • Use: connect RC400 receiver to power ; valves or IO
    Regular price £211.01
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  • Scanreco Antenna Extension (2.5m)
    Regular price £97.10
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    Scanreco Antenna Extension (2.5m)

    Key Features

    • Type: antenna extension cable for RC400 receiver
    • Length: as specified in title
    • Impedance: 50 ohm typical
    • Connector: coax connection for RC400 antenna port
    • Use: optimise radio reception by relocating antenna
    Regular price £97.10
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  • 1" Quick Release Coupling (Screw Type, Female)
    Regular price £59.82
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    1" Quick Release Coupling (Screw Type, Female)

    Key Features

    • Type: screw to connect quick release coupling female
    • Port size: 1"
    • Benefit: high resistance to pressure spikes
    • Use: high pressure attachments ; hammer circuits
    • Standard: screw to connect design
    • Pressure: high impulse rated per series
    Regular price £59.82
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  • Support for Hydra Part Cab Control Units - Approved Hydraulics Limited
    Regular price £24.40
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    Support for Hydra Part Cab Control Units

    Key Features

    • Type: cab control housing
    • Function: mount levers ; toggles and indicators
    • Construction: steel enclosure
    • Use: operator interface on vehicle or plant
    • Ingress: ip rating per build
    • Mounting: dash or pedestal mount
    Regular price £24.40
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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.

  • Clockwise Group 2 Tandem Hydraulic Pumps - Front
    Regular price £159.78
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    Clockwise Group 2 Tandem Hydraulic Pumps - Front

    Key Features

    • Type: group 2 tandem external gear pump
    • Displacement: 4.5 to 25 cc per rev per section
    • Rotation: clockwise
    • Mounting: 2 or 4 bolt flange per variant
    • Use: supply multiple circuits from one drive
    Regular price £159.78
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  • CETOP 3 Manual Override Cap (Screw Type) - Approved Hydraulics Limited
    Regular price £18.42
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    CETOP 3 Manual Override Cap (Screw Type)

    Key Features

    • Type: manual override cap for cetop 3 valve
    • Interface: fits din 24340 ; iso 4401 03 valves
    • Style: screw type override
    • Use: manual operation for setup or emergency
    • Seal: o ring under cap
    • Material: steel or polymer head
    Regular price £18.42
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  • CETOP 5 Manifolds - P & T 3/4" - A & B 1/2"
    Regular price From £81.30
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    CETOP 5 Manifolds - P & T 3/4" - A & B 1/2"

    Key Features

    • Type: cetop 5 ng10 manifold
    • Interface: iso 4401 05 pattern
    • Ports: p ; t 3/4" bsp ; a ; b 1/2" bsp
    • Mounting: 4 hole on industry mm pcd
    • Use: mount ng10 valves to pipework
    Regular price From £81.30
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  • Hydra Part Top Link Double Pilot Check Valve 1/2"BSP  50Lpm - Approved Hydraulics
    Regular price £81.46
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    Top Link Double Pilot Check Valve 3/4"BSP

    Key Features

    • Type: double pilot operated check valve
    • Threads: 3/4" 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 £81.46
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  • Hydra Part FLOW DIVIDER/COMBINER 0 In line 3/8" BSP in/out 13-23 lpm - Approved Hydraulics
    Regular price £117.16
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    FLOW DIVIDER/COMBINER 50/50 In line 3/8" BSP In/Out - 24-38 LPM

    Key Features

    • Type: flow divider combiner valve
    • Ports: 3/8" bsp
    • Range: 24 to 38 lpm
    • Function: splits inlet into controlled flows and recombines in reverse
    • Use: share pump flow ; synchronize circuits
    Regular price £117.16
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  • High Pressure 3 Port Manual Diverter Valve - Steel 1" 500Bar - Approved Hydraulics Limited
    Regular price £125.34
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    High Pressure 3 Port Manual Diverter Valve - Steel 1" 500Bar

    Key Features

    • Type: 3 port manual diverter valve
    • Ports: 1" bsp
    • Pressure: up to 500 bar class
    • Body: steel construction
    • Use: select pressure line between two circuits
    Regular price £125.34
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  • 6 Port Closed Centre Solenoid Diverter Valve 3/4" 120LPM 12vDC/24vDC
    Regular price £364.21
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    6 Port Closed Centre Solenoid Diverter Valve 3/4" 120LPM 12vDC/24vDC

    Key Features

    • Type: 6 port ; 2 position solenoid diverter ; closed centre
    • Port size: 3/4"
    • Nominal flow: 120 lpm
    • Coils: 12 vdc ; 24 vdc
    • Function: select two circuits ; isolates when de-energised
    • Typical applications: auxiliary circuit selection on mobile plant
    Regular price £364.21
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  • Hydra Part 6 Port Solenoid Diverter Valve 3/8" Open Centre 50LPM 12/24vDC - Approved Hydraulics
    Regular price £102.36
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    6 Port Closed Centre Solenoid Diverter Valve 3/8" 50LPM 12vDC/24vDC

    Key Features

    • Type: 6 port 2 position stackable diverter
    • Nominal flow: 50 L/min
    • Max operating pressure: up to 250 bar; 350 bar with drain (typical)
    • Ports: 3/8" BSP
    • Actuation: solenoid 12V or 24V DC
    • Use: add auxiliary circuit from a single control lever
    • Stacking: multiple valves can be used in series
    Regular price £102.36
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  • Hydra Part 6 Port Solenoid Diverter Valve 1/2" Open Centre 80LPM 12/24Vdc - Approved Hydraulics
    Regular price £133.36
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    6 Port Closed Centre Solenoid Diverter Valve 1/2" 80LPM 12vDC/24vDC

    Key Features

    • Type: 6 port 2 position stackable diverter (series up to 5 units)
    • Nominal flow: 80 L/min
    • Max operating pressure: 250 bar
    • Ports: 1/2" BSP
    • Actuation: solenoid 12V or 24V DC
    • Filtration: 18/14 to ISO 4406
    • Fluid temperature: -20 to +70 °C; ambient -40 to +95 °C
    • Viscosity range: 10–400 mm2/s
    • Note: solenoid design avoids external drain line
    Regular price £133.36
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  • Hydra Part CETOP 3 All Ports Blocked with Manual Lever - Approved Hydraulics
    Regular price From £127.80
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    CETOP 3 - P Blocked - A&B to T with Manual Lever

    Key Features

    • Interface: cetop 3 ; ng06 ; iso 4401-03
    • Actuation: manual lever
    • Spool function: ng06 ; p blocked ; a ; b to t
    • Mounting: sandwich between manifold and subplate
    • Use: manual override ; test ; emergency operation
    Regular price From £127.80
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    • Order by 3pm for Next Day Delivery
  • Hydra Part CETOP 3 All Ports Blocked with Manual Lever - Approved Hydraulics
    Regular price From £110.75
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    CETOP 3 All Ports Connected with Manual Lever

    Key Features

    • Interface: cetop 3 ; ng06 ; iso 4401-03
    • Actuation: manual lever
    • Spool function: ng06 ; all ports connected
    • Mounting: sandwich between manifold and subplate
    • Use: manual override ; test ; emergency operation
    Regular price From £110.75
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  • Hydra Part CETOP 3 All Ports Blocked with Manual Lever - Approved Hydraulics
    Regular price From £160.25
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    CETOP 3 - P to T - A&B Blocked with Manual Lever

    Key Features

    • Interface: cetop 3 ; ng06 ; iso 4401-03
    • Actuation: manual lever
    • Spool function: ng06 ; p to t ; a ; b blocked
    • Mounting: sandwich between manifold and subplate
    • Use: manual override ; test ; emergency operation
    Regular price From £160.25
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    • Order by 3pm for Next Day Delivery
  • Proportional 5 Pin Paddle - Approved Hydraulics Limited
    Regular price £229.54
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    Proportional 5 Pin Paddle

    Key Features

    • Type: proportional paddle lever for RC400 transmitters
    • Connector: 5 pin electrical interface
    • Return: spring return to center
    • Integration: Mini and Maxi portable control units
    • Use: proportional function control with fingertip actuation
    Regular price £229.54
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  • HP50 1/2" Solenoid & Lever Control Valves 50LPM 12/24VDC - Approved Hydraulics Limited
    Regular price From £404.90
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    HP50 1/2" Solenoid & Lever Control Valves 50LPM 12/24VDC

    Key Features

    • Valve type: monoblock ; solenoid + lever control
    • Nominal flow: 50 lpm
    • Coils: 12 vdc ; 24 vdc
    • Sections: up to 6 sections in single housing
    • Spool: double acting standard ; other spools available
    • Options: hp carry over ; valve kits ; connectors
    • Mounting: in line ; direct to system
    Regular price From £404.90
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Hydraulic Pilot Control Joystick - 30056364
    Regular price £431.81
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    Hydraulic Pilot Control Joystick - 30056364

    Key Features

    • Type: hydraulic pilot control joystick
    • Actuation: progressive ; low operating force
    • Handles: multiple grip variants ; proportional ; switching
    • Use: operate directional valves ; pumps ; motors
    • Notes: suitable for mobile hydraulic pilot circuits
    Regular price £431.81
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    • Order by 3pm for Next Day Delivery
  • Hydraulic Pilot Control Joystick - 30056363
    Regular price £431.81
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    Hydraulic Pilot Control Joystick - 30056363

    Key Features

    • Type: hydraulic pilot control joystick
    • Actuation: progressive ; low operating force
    • Handles: multiple grip variants ; proportional ; switching
    • Use: operate directional valves ; pumps ; motors
    • Notes: suitable for mobile hydraulic pilot circuits
    Regular price £431.81
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Hydra Part CETOP 3 All Ports Blocked with Manual Lever - Approved Hydraulics
    Regular price From £127.80
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    • Delivery to UK & Ireland

    CETOP 3 All Ports Blocked with Manual Lever

    Key Features

    • Interface: cetop 3 ; ng06 ; iso 4401-03
    • Actuation: manual lever
    • Spool function: ng06 ; all ports blocked
    • Mounting: sandwich between manifold and subplate
    • Use: manual override ; test ; emergency operation
    Regular price From £127.80
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 160L Monoblock Valve 3/4" BSP Double Acting Spring Return
    Regular price From £223.24
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    160L Monoblock Valve 3/4" BSP Double Acting Spring Return

    Key Features

    • Nominal flow: 160 lpm
    • Max flow: 200 lpm
    • Operating pressure: up to 250 bar
    • Ports: 3/4" bsp
    • Spool: double acting ; spring return to neutral
    • Features: built in adjustable main relief valve
    • Use: high flow mobile hydraulics
    Regular price From £223.24
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    • Order by 3pm for Next Day Delivery
  • Hydra Part Double Acting Mini Cylinders - Approved Hydraulics
    Regular price From £136.26
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    Double Acting Mini Cylinders

    Key Features

    • Type: double acting mini cylinder
    • Mounting: 4 bolt side plate ; foot plate on rod end
    • Check valve: pilot operated check on port
    • Construction: compact ram for stabiliser duties
    • Stroke options: per model ; cut to spec
    Regular price From £136.26
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    • Order by 3pm for Next Day Delivery
  • Scanreco Don't Forget Me Device For RC400 Transmitter - Approved Hydraulics
    Regular price £312.20
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    Don't Forget Me Device For RC400 Transmitter

    Key Features

    • Type: transmitter reminder accessory
    • Function: helps prevent leaving transmitter behind
    • Compatibility: RC400 Mini ; Maxi families
    • Attachment: fits to strap or holster
    • Use: operator safety ; asset retention
    Regular price £312.20
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    • Order by 3pm for Next Day Delivery

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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.