• 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
  • Approved Hydraulics Telehandler Option Cone Splitter (AH800CS) - Approved Hydraulics

    POA

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    Telehandler Option Cone Splitter (AH800CS)

    Key Features

    • Application: telehandler frame for AH800CS
    • Weight: ~185kg excluding hitch (AH800CS head)
    • Cone: 250mm diameter x 400mm long; removable tip
    • Hydraulic motor: max torque ~2475 N·m
    • Typical max log size: ~3m long x 1.3m diameter
    • Customisation: frames built to suit customer machines

    POA

    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice
  • Hydra Part Bent Axis DIN Piston Pumps (34-130cc) - Approved Hydraulics
    Regular price From £620.34
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    Hydra Part Bent Axis DIN Piston Pumps (34-130cc)

    Key Features

    • Type: bent axis piston pump
    • Mounting: din interface
    • Displacements: 34 to 130 cc options
    • Characteristics: high efficiency ; high pressure capability
    • Use: mobile ; industrial circuits
    Regular price From £620.34
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    • Order by 3pm for Next Day Delivery
  • Hydra Part 3 Way High Pressure Ball Valves - Approved Hydraulics
    Regular price From £49.61
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    3 Way High Pressure Ball Valves

    Key Features

    • Type: 3 way high pressure ball valve
    • Body: zinc plated steel
    • Seals: buna n ; pom
    • Function: diverts inlet to port a or b by lever selection
    • Typical ports: bsp thread options
    Regular price From £49.61
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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.

  • Hydra Part 2 Way High Pressure Ball Valves - Approved Hydraulics
    Regular price From £19.13
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    2 Way High Pressure Ball Valves

    Key Features

    • Type: 2 way high pressure ball valve
    • Body: zinc plated steel
    • Seals: buna n ; pom
    • Operation: open ; close with quarter turn lever
    • Use: isolate hydraulic flow under pressure
    Regular price From £19.13
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  • Scanreco RC400 6 Function Radio Remote Control (G2B) - Approved Hydraulics
    Regular price £3,563.03
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    RC400 6 Function Radio Remote Control (G2B) 12vDC/24vDC

    Key Features

    • Type: RC400 G2B proportional radio remote system
    • Functions: 6 proportional functions
    • Supply: 12 to 24 vdc system voltage
    • Transmitter: Mini or Maxi housing per kit
    • Receiver: G2B PWM ; voltage outputs variants
    • Safety: emergency stop integrated
    • Use: proportional control of hydraulic valves
    Regular price £3,563.03
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  • Z50 3/8" Solenoid Control Valves 50LPM 12/24VDC - Approved Hydraulics Limited
    Regular price From £159.47
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    Z50 3/8" Solenoid Control Valves 50LPM 12/24VDC

    Key Features

    • Valve type: solenoid operated monoblock
    • Nominal flow: 50 lpm
    • Port size: 3/8" bsp
    • Coils: 12 vdc ; 24 vdc
    • Sections: up to 6 sections
    • Options: hp carry over ; spool kits
    Regular price From £159.47
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  • Hydra Part Flow Regulator Valves with Check (Uni-directional) - Approved Hydraulics
    Regular price From £36.86
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    Flow Regulator Valves with Check (Uni-directional)

    Key Features

    • Type: uni directional flow regulator with check
    • Function: meter in one direction ; free flow via check in reverse
    • Ports: bsp sizes
    • Typical sizes: 1/4" ; 3/8" ; 1/2"
    • Use: control actuation speed in one direction
    Regular price From £36.86
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  • Hydra Part Flow Regulator Valves with Needle Shut Off - Approved Hydraulics
    Regular price From £31.10
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    Flow Regulator Valves with Needle Shut Off

    Key Features

    • Type: bi directional flow regulator with needle shut off
    • Function: adjust flow ; fully close with needle
    • Ports: bsp sizes
    • Typical sizes: 1/4" ; 3/8" ; 1/2"
    • Use: meter actuator speed both directions
    Regular price From £31.10
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  • Hydraulic Motors (MT Series)
    Regular price From £399.03
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    Hydraulic Motors (MT Series)

    Key Features

    • Design: geroler ; shaft distribution flow
    • Mounting: 4 bolt flange
    • Characteristics: smooth operation ; high efficiency ; long life
    • Displacements: multiple options per series
    • Applications: winches ; conveyors ; augers ; slew drives
    Regular price From £399.03
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    • Order by 3pm for Next Day Delivery
  • Hydra Part Side Mounted Aluminium Oil Tanks (150L, 180L, 200L, 250L) - Approved Hydraulics
    Regular price From £758.20
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    Side Mounted Aluminium Oil Tanks (150L, 180L, 200L, 220L, 235L, 250L, 290L)

    Key Features

    • Construction: aluminium side mounted
    • Capacities: 150l ; 180l ; 200l ; 220l ; 235l ; 250l ; 290l options
    • Return filtration: return filter variants ; per model
    • Accessories: filler breather ; level sight ; drain per tank spec
    • Use: mobile hydraulic reservoirs on trucks
    • Mounting: side brackets
    Regular price From £758.20
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    • Order by 3pm for Next Day Delivery
  • Squires Engineering Quick Release Coupling - Approved Hydraulics
    Regular price From £348.06
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    Quick Release Coupling

    Key Features

    • Type: hydraulic quick release coupling
    • Standard: options per iso 7241 series a ; b and iso 16028 flat face
    • Valve: poppet or flat face valve with ball latch
    • Seals: nitrile nbr typical ; ptfe back up
    • Use: connect ; disconnect hydraulic lines quickly
    Regular price From £348.06
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    • Order by 3pm for Next Day Delivery
  • Hydra Part HP-GP30 Side & Rear Ported PTO Gear Pumps (82cc) - Approved Hydraulics
    Regular price From £232.43
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    GP30 Side & Rear Ported PTO Gear Pumps

    Key Features

    • Pump type: external gear ; pto
    • Design: bi rotational
    • Ports: side ; rear port options
    • Construction: 2 piece body ; high quality alloys
    • Use: truck pto systems ; high duty cycles
    Regular price From £232.43
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    • Order by 3pm for Next Day Delivery
  • Hydra Part 3 Port Solenoid Diverter Valve 3/8" 12/24vDC - Approved Hydraulics
    Regular price £103.64
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    3 Port Closed Centre Solenoid Diverter Valve 3/8" 80LPM 12/24vDC

    Key Features

    • Type: 3 port 2 position diverter valve
    • Ports: 3/8" BSP
    • Actuation: solenoid 12V or 24V DC
    • Function: redirects flow between two circuits in closed centre systems
    • Mounting: line mounted body
    • Brand: Hydra Part; data sheet available
    Regular price £103.64
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    • Order by 3pm for Next Day Delivery
  • Hydra Part 3 Port Solenoid Diverter Valve 1/2" 12/24vDC - Approved Hydraulics
    Regular price From £96.49
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    3 Port Closed Centre Solenoid Diverter Valve 1/2" 80LPM 12/24vDC

    Key Features

    • Type: 3 port 2 position diverter valve
    • Ports: 1/2" BSP
    • Actuation: solenoid 12V or 24V DC
    • Function: redirects flow between two circuits in closed centre systems
    • Mounting: line mounted body
    • Brand: Hydra Part; data sheet available
    Regular price From £96.49
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Hydra Part 90º Rotary Swivel Joint - Approved Hydraulics
    Regular price From £26.36
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    90º Rotary Swivel Joint

    Key Features

    • Type: 90 degree rotary swivel joint
    • Installation: between hose and rigid component
    • Function: allows occasional rotation ; reduces hose stress
    • Ports: bsp female sizes
    • Typical applications: hose routing on mobile plant
    Regular price From £26.36
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    • Order by 3pm for Next Day Delivery
  • Mead PTO Switch - Panel/Dash Mounted Air Control Valve (Electrical Release) - Approved Hydraulics
    Regular price £165.30
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    PTO Switch - Panel/Dash Mounted Air Control Valve (Electrical Release)

    Key Features

    • Type: panel or dash mounted pneumatic PTO control valve
    • Function: manually operated 4/2 switching with electric reset
    • Ports: push in fittings typically 6 mm
    • Interlock: safety reset port for handbrake or ECU signal
    • Use: PTO actuation ; hoist ; auxiliary cylinders
    Regular price £165.30
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    • Order by 3pm for Next Day Delivery
  • Mead PTO Switch - Panel/Dash Mounted Air Control Valve (Manual Air Release) - Approved Hydraulics
    Regular price £103.94
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    PTO Switch - Panel/Dash Mounted Air Control Valve (Manual Air Release)

    Key Features

    • Type: panel or dash mounted pneumatic PTO control valve
    • Function: manually operated 4/2 directional switching
    • Ports: push in fittings typically 6 mm
    • Reset: pneumatic reset with indicator band
    • Use: PTO actuation ; hoist ; auxiliary cylinders
    Regular price £103.94
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    • Order by 3pm for Next Day Delivery
  • Hydra Part Tipper Cab Control Unit (Tip Only) - Approved Hydraulics
    Regular price £98.93
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    Tipper Cab Control Unit (Tip Only)

    Key Features

    • Use case: In-cab control of PTO engagement and tipping functions
    • Notes: Specification information is limited in source listing; confirm dimensions and compatibility before purchase
    • Notes: Details not stated
    • Notes: Details not stated
    • Notes: Details not stated
    Regular price £98.93
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Hydra Part Worm Drives including Hydraulic Motor - Approved Hydraulics
    Regular price From £1,665.06
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    Hydraulic Worm Drives

    Key Features

    • Output torque: 3.3 kN.m - 34 kN.m
    • Tilting moment torque: 11.8 kN.m - 310 kN.m
    • Holding torque: 6.5 kN.m - 158.3 kN.m
    • Weight: 35 Kg - 202 Kg
    Regular price From £1,665.06
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    • Order by 3pm for Next Day Delivery
  • Hydra Part Side Mounted Aluminium Oil Tanks With Filter (100 Litre) - Approved Hydraulics
    Regular price £479.75
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    Side Mounted Aluminium Oil Tanks With Filter (100 Litre)

    Key Features

    • Capacity: 100 L
    • Use case: Hydraulic reservoir for mobile hydraulic systems; tipper and PTO applications
    • Notes: Specification information is limited in source listing; confirm dimensions and compatibility before purchase
    • Notes: Details not stated
    • Notes: Details not stated
    Regular price £479.75
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Emmegi Emmegi Air-Oil Exchanger 100 lpm - 160 lpm - Oil Cooler with Relief Valve - Approved Hydraulics
    Regular price From £650.83
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    Emmegi Air-Oil Exchanger 100 lpm - 160 lpm - Oil Cooler with Relief Valve

    Key Features

    • Flow capacity options: 100 ; 120 ; 140 ; 160 l/min
    • Cooling capacity: ≈5.4-18 kW
    • Fan supply: 12 vdc ; 24 vdc
    • Bypass/relief: recommended to protect at cold start
    • Core rating: 20 bar max ; 35 bar test
    • Thermostat options: 40 ; 50 ; 60 ; 70 ; 80 ; 90 °c
    Regular price From £650.83
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    • Order by 3pm for Next Day Delivery
  • Emmegi Emmegi Air-Oil Exchanger 100 lpm - 160 lpm - Oil Cooler - Approved Hydraulics
    Regular price From £466.21
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    Emmegi Air-Oil Exchanger 100 lpm - 160 lpm - Oil Cooler

    Key Features

    • Flow capacity options: 100 ; 120 ; 140 ; 160 l/min
    • Cooling capacity: ≈5.4-18 kW
    • Fan supply: 12 vdc ; 24 vdc
    • Core rating: vacuum-brazed aluminium; 20 bar max; 35 bar test
    • Applications: mobile hydraulics ; cranes ; ag machinery
    Regular price From £466.21
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • TEC TEC Single Phase Electric Motors - 4 Pole, 1500rpm, 240vAC (PERMANENT CAP) - Approved Hydraulics
    Regular price From £87.58
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    TEC Single Phase Electric Motors - 4 Pole, 1500rpm, 230vAC (PERMANENT CAP)

    Key Features

    • Type: single phase cap start ; cap run induction motor
    • Speed: 4 pole 1500 rpm nominal at 50 hz
    • Starting: high starting torque for heavy loads
    • Enclosure: tefc ip55 aluminium frame
    • Insulation: class f with ptc 130°c thermal
    • Duty: s1 continuous ic411 cooling
    • Voltage: 230 ; 400 vac 50 hz three phase or 230 vac single phase per model
    • Mounting: b3 foot ; b5 flange ; b14 face options
    • Standards: iec 60034 ; ie3 or ie2 efficiency classes
    Regular price From £87.58
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    • Delivery to UK & Ireland
    • 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.