• Hydraulic Differential Type Relief Valve, VMPP 3/4" (20-200 Bar Adjustment) - Approved Hydraulics Limited
    Regular price £94.90
    • All Items Guaranteed
    • Delivery to UK & Ireland

    Hydraulic Differential Type Relief Valve, VMPP 3/4" (20-200 Bar Adjustment)

    Key Features

    • Type: differential poppet pressure relief valve VMPP
    • Ports: 3/8" BSPP P ; T
    • Setting range: 100–250 bar adjustable
    • Nominal flow variants: 20 l.min ; 50 l.min options
    • Leakage: guided poppet ; negligible leakage
    • Materials: zinc plated steel body ; hardened internals
    Regular price £94.90
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Hydra-PART 90 Degree Tilting Unit For 4-8T Excavators Machines Giving 7000 N/m Torque
    Regular price £3,840.06
    • All Items Guaranteed
    • Delivery to UK & Ireland

    Hydra-PART 90 Degree Tilting Unit For 4-8T Excavators Machines Giving 7000 N/m Torque

    Key Features

    • Machine class: 4–8 t excavators
    • Tilt angle: ±45 deg ; 90 deg total
    • Output torque: 7000 N.m
    • Drive type: sealed rotary actuator
    • Intended use: precision grading ; ditching ; backfilling
    Regular price £3,840.06
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Hydra-PART 90 Degree Tilting Unit For 8T-12T Excavators Machines Giving 9000 N/m Torque
    Regular price £4,560.06
    • All Items Guaranteed
    • Delivery to UK & Ireland

    Hydra-PART 90 Degree Tilting Unit For 8T-12T Excavators Machines Giving 9000 N/m Torque

    Key Features

    • Machine class: 8–12 t excavators
    • Tilt angle: ±45 deg ; 90 deg total
    • Output torque: 9000 N.m
    • Drive type: sealed rotary actuator
    • Hydraulics: suitable for two line control ; check flow ; pressure per datasheet
    • Use: grading ; battering ; trenching without repositioning machine
    Regular price £4,560.06
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Hydra-PART 134 degree tilting unit for 12-16T Excavators Machines Giving 15000 N/m Torque
    Regular price £7,320.06
    • All Items Guaranteed
    • Delivery to UK & Ireland

    Hydra-PART 134 degree tilting unit for 12-16T Excavators Machines Giving 15000 N/m Torque

    Key Features

    • Tilt range: 134 degree total tilt arc
    • Rated torque: 15000 N m output torque class
    • Carrier class: suits 12 ; 16 ton excavators
    • Use case: tilting of buckets and tools for grading ; trenching and access works
    • Integration: compact rotary actuator package ready to mount to appropriate hitch
    • Notes: select correct mount and hydraulics to suit carrier aux circuit
    Regular price £7,320.06
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 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.

  • Motor Spool For 50L AK Electric / Lever Operated Valve - Approved Hydraulics Limited
    Regular price £15.25
    • All Items Guaranteed
    • Delivery to UK & Ireland

    Motor Spool For 50L AK Electric / Lever Operated Valve

    Key Features

    • Spool function: motor spool geometry with A ; B open to tank in neutral for freewheeling
    • Valve family: fits 50 LPM AK electric or lever operated sectional valve body
    • Purpose: minimise cavitation risk and allow smooth motor rundown at neutral
    • Use case: hydraulic motors on conveyors ; augers ; winches
    • Service note: check section seals and end caps during spool replacement
    • Selection: confirm 50L AK body type before ordering
    Regular price £15.25
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 8 Button On/Off Radio Remote System 12-24VDC prewired 2.4 Mt Cable
    Regular price £414.60
    • All Items Guaranteed
    • Delivery to UK & Ireland

    8 Button On/Off Radio Remote System 12-24VDC prewired 2.4 Mt Cable

    Key Features

    • Functions: 8 on ; off pushbuttons
    • Supply: 12 ; 24 VDC receiver
    • Harness: 2.4 m prewired receiver connection
    • Use case: multiple discrete outputs for valve coils or contactor logic
    • Applications: hydraulic attachment control where simple binary commands are required
    • Note: choose e stop variant where a safety interlock is mandated
    Regular price £414.60
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 4 Button On/Off Radio Remote System 12-24VDC prewired 2.4 Mt Cable
    Regular price £355.63
    • All Items Guaranteed
    • Delivery to UK & Ireland

    4 Button On/Off Radio Remote System 12-24VDC prewired 2.4 Mt Cable

    Key Features

    • Functions: 4 on ; off pushbuttons
    • Supply: 12 ; 24 VDC receiver
    • Harness: 2.4 m prewired receiver lead
    • Use case: simple on ; off control of one or two double acting functions
    • Form factor: handheld transmitter with compact receiver
    • Applications: tippers ; winches ; auxiliary hydraulic functions
    Regular price £355.63
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Out of Stock
    8 Button On/Off + E-stop Radio Remote System 12-24VDC prewired 2.4m Cable
    Regular price £790.46
    • All Items Guaranteed
    • Delivery to UK & Ireland

    8 Button On/Off + E-stop Radio Remote System 12-24VDC prewired 2.4m Cable

    Key Features

    • Functions: 8 on ; off pushbuttons with dedicated emergency stop
    • Supply: 12 ; 24 VDC receiver input
    • Harness: prewired receiver cable 2.4 m for quick install
    • Use case: discrete control of solenoid valves ; contactors or relays on mobile plant
    • Integration: suited to retrofit of simple hydraulic controls with radio link
    • Safety: e stop provides immediate stop signal to system interlock
    Regular price £790.46
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 12 Button On/Off + E-stop Radio Remote System 12-24VDC prewired 2.4m cable
    Regular price £1,358.09
    • All Items Guaranteed
    • Delivery to UK & Ireland

    12 Button On/Off + E-stop Radio Remote System 12-24VDC prewired 2.4m cable

    Key Features

    • Functions: 12 on ; off pushbuttons plus dedicated emergency stop
    • Supply: 12 ; 24 VDC receiver input prewired with 2.4 m cable
    • Use case: retrofit on ; off control of hydraulic valves or contactor logic
    • Form factor: handheld transmitter with paired receiver for mobile machinery
    • Safety: E stop provides immediate shutdown signal to system interlock
    • Frequency: industrial license free bands with robust interference mitigation
    Regular price £1,358.09
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Aluminium Hydraulic Female Shaft AGRI PTO Gearbox 3:1 Ratio (20 kW Max) with Group 3 Pump - Approved Hydraulics Limited
    Regular price £382.30
    • All Items Guaranteed
    • Delivery to UK & Ireland

    Aluminium Hydraulic Female Shaft AGRI PTO Gearbox 3:1 Ratio (20 kW Max) with Group 3 Pump

    Key Features

    • Gear ratio: 3 ; 1 speed increase
    • Power rating: 20 kW
    • Input coupling: female quick coupling PTO 1 3/8 inch 6 spline standard
    • Pump interface: supplied with Group 3 gear pump for higher displacement
    • Recommended limits: keep gearbox output below 3000 rpm per common PTO gearbox guidance
    • Construction: aluminium gearbox for low mass on 3 point link implements
    Regular price £382.30
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Aluminium Hydraulic Male Shaft AGRI PTO Gearbox 3:1 Ratio (20 kW Max) with Group 3 Pump
    Regular price From £403.26
    • All Items Guaranteed
    • Delivery to UK & Ireland

    Aluminium Hydraulic Male Shaft AGRI PTO Gearbox 3:1 Ratio (20 kW Max) with Group 3 Pump

    Key Features

    • Gear ratio: 3 ; 1 step up for pump speed
    • Power rating: 20 kW maximum
    • Input/output: 540 rpm PTO nominal to ~1620 rpm output ; observe 3000 rpm max output guidance
    • Shafts: male PTO 1 3/8 inch 6 spline interface
    • Pump interface: supplied with Group 3 gear pump for higher flow demand
    • Construction: lightweight aluminium gearbox for agricultural PTO duty
    Regular price From £403.26
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Cylinder Seal Kit for Intermercato TG 12, 16, 19, 16 PRO, 16 EG - Approved Hydraulics Limited
    Regular price £167.05
    • All Items Guaranteed
    • Delivery to UK & Ireland

    Cylinder Seal Kit For DAP8040 cylinder (CEL Cyls Models Only)

    Key Features

    • Compatibility: DAP8040 pattern cylinder used on CEL cylinder models only
    • Bore x rod class: 80 x 40 mm nominal geometry per 8040 designation
    • Intended use: complete reseal to address external leaks ; bypass and drift
    • Typical kit contents: piston seal ; rod seal ; wiper ; and static seals commonly used
    • Applications: general purpose rams on attachments and agricultural machinery
    • Fitment note: verify CEL cylinder label before ordering to ensure correct kit series
    Regular price £167.05
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Seal Kit For Hydra Part MR Motor (Zi) - Approved Hydraulics Limited
    Regular price £31.21
    • All Items Guaranteed
    • Delivery to UK & Ireland

    Seal Kit For Hydra Part MR Motor (Zi)

    Key Features

    • Compatibility: Hydra Part MR high torque orbital motors ; Zi pattern
    • Intended use: seal replacement for motor front end and housing to stop oil leakage
    • Typical kit contents: shaft seal ; housing o rings ; drain and port seals typical for MR motors
    • Applications: industrial and mobile hydraulic drives across compact machinery
    • Service note: check case drain port condition ; replace washers if distorted
    • Selection note: use motor nameplate to match the correct MR kit variant
    Regular price £31.21
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Seal Kit For Hydra Part MR Motor (Zi) - Approved Hydraulics Limited
    Regular price £37.60
    • All Items Guaranteed
    • Delivery to UK & Ireland

    Seal Kit For Hydra Part MT Motor (Zi)

    Key Features

    • Compatibility: Hydra Part MT orbital motors ; Zi pattern
    • Intended use: renew shaft ; cover and case seals to correct oil leaks and pressure loss
    • Typical kit contents: output shaft seal ; body o rings ; port and drain seals used on MT motors
    • Applications: low speed high torque drives on conveyors ; wheel motors ; winches
    • Service note: inspect shaft for wear ; replace if grooved to protect new seal
    • Fitment check: confirm MT model code and mounting to select correct kit
    Regular price £37.60
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Seal Kit For Hydra Part MR Motor (Zi) - Approved Hydraulics Limited
    Regular price £42.37
    • All Items Guaranteed
    • Delivery to UK & Ireland

    Seal Kit For Hydra Part MSY Motor (Zi)

    Key Features

    • Compatibility: Hydra Part MSY series disc valve orbital motors ; Zi pattern
    • Motor notes: MSY motors use disc valve distribution offering higher torque capability in family
    • Intended use: seal replacement for output shaft ; cover and porting to resolve leaks
    • Typical kit contents: shaft seal ; housing o rings ; drain port seals commonly replaced on service
    • Applications: industrial and mobile drives requiring rugged low speed high torque performance
    • Selection note: check MSY displacement code and mounting to select correct kit
    Regular price £42.37
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Seal Kit For Hydra Part MR Motor (Zi) - Approved Hydraulics Limited
    Regular price £41.92
    • All Items Guaranteed
    • Delivery to UK & Ireland

    Hydra Part MV Motor Seal Kit (Zi)

    Key Features

    • Compatibility: Hydra Part MV high torque orbital motors ; Zi pattern
    • Intended use: renew housing ; shaft and cover seals to prevent oil leakage and pressure loss
    • Typical kit contents: shaft seal ; case drain and port seals ; body o rings used on MV motors
    • Applications: drive motors on conveyors ; winches ; swing drives and attachments
    • Service note: inspect shaft surface finish ; replace or sleeve if worn to protect new seal
    • Fitment check: confirm MV motor code on nameplate to match kit version
    Regular price £41.92
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Cylinder Seal Kit for Intermercato TG 12, 16, 19, 16 PRO, 16 EG - Approved Hydraulics Limited
    Regular price £26.32
    • All Items Guaranteed
    • Delivery to UK & Ireland

    HP-30C Type Group 3 Pump Seal Kit

    Key Features

    • Compatibility: Hydra Part HP-30C Group 3 aluminium gear pumps
    • Intended use: service kit for shaft and static seals on Group 3 pump body
    • Typical kit contents: front lip seal ; cover o rings and body seals for Group 3 construction
    • Reference performance: Group 3 pumps in range typically used at higher flows and pressures
    • Applications: PTO driven systems ; industrial power units requiring larger displacements
    • Fitment check: confirm HP-30C family before ordering to ensure correct diameters
    Regular price £26.32
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Cylinder Seal Kit for Intermercato TG 12, 16, 19, 16 PRO, 16 EG - Approved Hydraulics Limited
    Regular price £11.17
    • All Items Guaranteed
    • Delivery to UK & Ireland

    HP-C20 Tandem Gear Pump Seal Kit. Suits Front 067 or Rear 066

    Key Features

    • Compatibility: Hydra Part Group 2 tandem pumps using front code 067 ; rear code 066 interfaces
    • Intended use: renew the sealing set when splitting tandem sections or replacing shaft seal
    • Typical kit contents: shaft seal ; o rings ; interface seals used between tandem pump sections
    • Notes on assembly: ensure rear shaft selection matches torque from front section during build
    • Applications: tandem pumps on tippers ; loaders ; auxiliary hydraulic circuits
    • Variant note: front 067 ; rear 066 code covers common Group 2 tandem configurations
    Regular price £11.17
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Cylinder Seal Kit for Intermercato TG 12, 16, 19, 16 PRO, 16 EG - Approved Hydraulics Limited
    Regular price £15.37
    • All Items Guaranteed
    • Delivery to UK & Ireland

    HP-10C Group 1 Pump Seal Kit

    Key Features

    • Compatibility: Hydra Part HP-10C Group 1 gear pumps
    • Intended use: renew shaft and static seals during Group 1 pump overhaul
    • Typical kit contents: front shaft oil seal ; body o rings ; gasket elements for Group 1 casing
    • Pump family: light duty aluminium gear pumps used widely on compact hydraulics
    • Service note: check for shaft play ; replace bearings if excessive to protect new seal
    • Applications: power packs ; small mobile circuits ; low to mid power implements
    Regular price £15.37
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Cylinder Seal Kit for Intermercato TG 12, 16, 19, 16 PRO, 16 EG - Approved Hydraulics Limited
    Regular price £18.73
    • All Items Guaranteed
    • Delivery to UK & Ireland

    Cylinder Seal kit 25-40/50 series 201/301/401/501

    Key Features

    • Compatibility: Hydra Part cylinder series 201 ; 301 ; 401 ; 501
    • Bore sizes: 25 ; 30 ; 35 ; 40/50 mm options in one kit family
    • Intended use: reseal of small bore cylinders within listed series to restore function
    • Typical kit contents: piston ; rod ; wiper seals with static o rings used in cylinder rebuilds
    • Applications: compact hydraulic rams on implements ; compact plant ; attachments
    • Selection note: match cylinder series and bore at time of order to ensure fit
    Regular price £18.73
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Cylinder Seal Kit for Intermercato TG 12, 16, 19, 16 PRO, 16 EG - Approved Hydraulics Limited
    Regular price £22.81
    • All Items Guaranteed
    • Delivery to UK & Ireland

    Cylinder Seal kit 20-32/40 series 200/300/400/500

    Key Features

    • Compatibility: Hydra Part cylinder series 200 ; 300 ; 400 ; 500
    • Bore sizes: 20 ; 25 ; 30/32 ; 40 mm
    • Intended use: reseal kit for small bore standard cylinders used on compact equipment
    • Typical kit contents: piston ; rod ; wiper seals and static rings typically supplied for rebuild
    • Applications: small actuators on trailers ; clamps ; light duty machinery
    • Selection note: use bore size and series number to choose correct kit option
    Regular price £22.81
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Cylinder Seal Kit for Intermercato TG 12, 16, 19, 16 PRO, 16 EG - Approved Hydraulics Limited
    Regular price £34.38
    • All Items Guaranteed
    • Delivery to UK & Ireland

    Cylinder Seal kit 40-70/80 series 204/304/404/504/592

    Key Features

    • Compatibility: Hydra Part cylinder series 204 ; 304 ; 404 ; 504 ; 592
    • Bore sizes: 40 ; 50 ; 63 ; 70/80 mm
    • Intended use: reseal kit for mid size cylinders across the listed series
    • Typical kit contents: piston ; rod ; wiper seals with associated o rings typical to service kits
    • Applications: ag implements ; compact construction machines ; materials handling rams
    • Fitment check: match series code on cylinder plate to ensure correct family selection
    Regular price £34.38
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Cylinder Seal Kit for Intermercato TG 12, 16, 19, 16 PRO, 16 EG - Approved Hydraulics Limited
    Regular price £25.91
    • All Items Guaranteed
    • Delivery to UK & Ireland

    Cylinder Seal kit 35-60/70 standard

    Key Features

    • Compatibility: Hydra Part standard cylinders ; bores 35 ; 40 ; 50 ; 60/70 mm
    • Intended use: reseal kit to address external leaks ; internal bypass and poor cylinder holding
    • Typical kit contents: piston seal ; rod seal ; wiper ; static seals as typically included in kits
    • Applications: light plant ; agricultural implements ; compact handling equipment
    • Sizing note: measure bore and rod to ensure correct option under the 35 ; 60/70 set
    • Install tip: use appropriate assembly sleeves to avoid cutting PTFE or elastomer lips
    Regular price £25.91
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Cylinder Seal Kit for Intermercato TG 12, 16, 19, 16 PRO, 16 EG - Approved Hydraulics Limited
    Regular price £36.47
    • All Items Guaranteed
    • Delivery to UK & Ireland

    Cylinder Seal kit 30-70/80 standard

    Key Features

    • Compatibility: Hydra Part standard double acting cylinders ; bores 30 ; 40 ; 50 ; 60/70 ; 80 mm
    • Intended use: routine reseal kit for compact and mid size standard cylinders
    • Typical kit contents: dynamic piston and rod seals ; wiper and static sealing elements typical for rebuild
    • Applications: compact machinery ; auxiliary rams ; attachments
    • Fitment check: verify bore and rod combo to select the correct sub option within the range
    • Service note: install with clean fluid and avoid sharp edges to protect sealing lips
    Regular price £36.47
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery

Shop All Components

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.