• HP-50 Kit-Complete Wet Spool Lever Cap For HP50 Control Valve - Approved Hydraulics Limited
    Regular price £23.50 Ex VAT £28.21 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland

    HP-50 Kit-Complete Wet Spool Lever Cap For HP50 Control Valve

    Key Features

    • Compatibility: HP50 monoblock control valve sections
    • Assembly: complete wet spool lever cap with lever hardware
    • Rated flow of valve: 50 l.min HP50 valve family
    • Seal type: wet armature design with O ring sealing
    • Use: service kit to replace damaged cap ; restores manual actuation
    Regular price £23.50 Ex VAT £28.21 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Banjo Tubes - Approved Hydraulics Limited
    Regular price £10.05 Ex VAT £12.06 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland

    1/2" Banjo Body To 15mm Tube x 100mm Long

    Key Features

    • Interface: banjo ring for 1/2" banjo bolt
    • Tube end: 15 mm OD tube to suit 15L DIN 2353 compression fittings
    • Overall length: 100 mm tube length
    • Working pressure: up to 350 bar typical for steel banjo tubes
    • Material: zinc plated steel body and tube
    • Use: mount cylinders or valves where compact banjo connection is needed
    Regular price £10.05 Ex VAT £12.06 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Out of Stock
    3/8" 3 Way Adjustable Priority Flow Control Valve  - Excess to Line. - Approved Hydraulics Limited
    Regular price £89.55 Ex VAT £107.47 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland

    3/8" 3 Way Adjustable Priority Flow Control Valve - Excess to Line.

    Key Features

    • Ports: G 3/8 BSPP
    • Function: 3 way pressure compensated priority flow control
    • Max inlet flow: 60 l.min
    • Max outlet C flow: 35 l.min
    • Max pressure: 270 bar
    • Body: aluminium body ; hardened steel internals
    • Use: set constant actuator flow with excess to tank or secondary circuit
    Regular price £89.55 Ex VAT £107.47 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Out of Stock
    3/8" Hose Burst Valve in a Female - Female Housing - Approved Hydraulics Limited
    Regular price £13.24 Ex VAT £15.89 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland

    3/8" Hose Burst Valve in a Female - Female Housing

    Key Features

    • Ports: G 3/8 BSPP female x female
    • Function: flow operated hose burst safety shut off
    • Max flow: 50 l.min typical
    • Max pressure: 350 bar
    • Body: zinc plated steel ; low leakage design
    • Options: orifice in disc for emergency lowering on request
    • Mounting: install at cylinder port ; use downstream flow regulator to control lowering
    Regular price £13.24 Ex VAT £15.89 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 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.

  • Out of Stock
    3 WAY PRIORITY VALVE - EXCESS TO LINE 3/4"
    Regular price £132.50 Ex VAT £159.00 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland

    3 WAY PRIORITY VALVE - EXCESS TO LINE 3/4"

    Key Features

    • Ports: G 3/4 BSPP
    • Function: 3 way priority flow control ; excess to S line
    • Max inlet flow: 150 l.min
    • Max regulated flow: up to 90 l.min adjustment range
    • Max pressure: 260 bar
    • Body: aluminium body ; hardened internal parts
    • Adjustment: twin handknob ; lockable
    • Typical use: steering priority ; auxiliary circuits from single pump
    Regular price £132.50 Ex VAT £159.00 Inc VAT
    • 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 £22.83 Ex VAT £27.40 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland

    MR motor seal kit (ZI)

    Key Features

    • Compatibility: M+S MR series orbital motors series 3 ; series 4
    • Shaft seal: 28.56 x 42 x 5.5 mm NBR typical
    • Dust seal: 28.5 x 35 x 2 mm
    • O rings: 48 x 2 mm ; 90 x 2 mm x3
    • Purpose: restores sealing to reduce leakage and maintain pressure
    • Use: service kit for MR motor overhaul ; maintenance
    • Notes: check shaft code ZI ; different seals exist for ZH ; ZK variants
    Regular price £22.83 Ex VAT £27.40 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • M5 x 110 CAP head bolt
    Regular price £1.85 Ex VAT £2.22 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland

    M5 x 110 CAP head bolt

    Key Features

    • Thread: metric M5
    • Length: 110 mm
    • Head: socket cap
    • Material: high tensile steel (typical)
    • Use: hydraulic assemblies; brackets; adapters
    • Drive: internal hex for controlled tightening
    Regular price £1.85 Ex VAT £2.22 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • ADAPTOR EN/ISO /4 Bolts) to PUMP UNI (3 Bolts); With One Ball Bearings - Approved Hydraulics Limited
    Regular price £84.26 Ex VAT £101.12 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland

    ADAPTOR EN/ISO /4 Bolts) to PUMP UNI (3 Bolts); With One Ball Bearings

    Key Features

    • Mounting interfaces: PTO EN.ISO 4 bolt to UNI 3 bolt
    • Integrated bearing: one ball bearing
    • Max torque: 315 N.m
    • Max power at 1000 rpm: 33 kW
    • Use case: fit UNI 3 bolt pumps to ISO 4 bolt PTO housings
    • Construction: steel adaptor with precision machining
    • Accessories: studs ; gaskets available in kits
    Regular price £84.26 Ex VAT £101.12 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • CABLE FOR MEC.OPERATION 3,0M WITH LEVER - Approved Hydraulics Limited
    Regular price £114.06 Ex VAT £136.88 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland

    CABLE FOR MEC.OPERATION 3,0M WITH LEVER

    Key Features

    • Type: mechanical cable operation kit
    • Length: 3.0 m
    • Includes: lever ; cable ; mounting hardware
    • Use: operate pto or valve from cab
    • Application: hydraulic system component
    Regular price £114.06 Ex VAT £136.88 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1" Bonded seal - Approved Hydraulics Limited
    Regular price £1.94 Ex VAT £2.33 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland

    1-1/2" Bonded seal

    Key Features

    • Type: bonded seal ; dowty washer
    • Size: 1/2"
    • Elastomer: nitrile nbr
    • Use: seals bspp bolt faces ; banjo fittings
    • Application: hydraulic system component
    Regular price £1.94 Ex VAT £2.33 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Group 2 Gear Motor 14cc/Rev , Euro Flange, 1:8 tpr Shaft, Reversible - Approved Hydraulics Limited
    Regular price £124.05 Ex VAT £148.86 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland

    Group 2 Gear Motor 14cc/Rev , Euro Flange, 1:8 tpr Shaft, Reversible

    Key Features

    • Motor series: Group 2 gear motor
    • Displacement: 14 cc.rev
    • Mount: European 4 bolt flange ; 1.8 taper shaft
    • Ports: BSP
    • Drain: external case drain recommended for reversible use
    Regular price £124.05 Ex VAT £148.86 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Hydra-PART 180 degree tilting unit for 1 - 3T Excavators Machines Giving  900 N/m Torque - Approved Hydraulics Limited
    Regular price £1,200.05 Ex VAT £1,440.06 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland

    Hydra-PART 180 degree tilting unit for 1 - 3T Excavators Machines Giving 900 N/m Torque

    Key Features

    • Machine class: 1–3 t excavators
    • Tilt angle: ±90 deg total 180 deg range depending on install
    • Drive: rotary actuator power tilt
    • Torque: ~900 N.m class
    • Use: fine grading ; ditching ; battering in tight spaces
    Regular price £1,200.05 Ex VAT £1,440.06 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Aluminium Hydraulic Male Shaft AGRI PTO Gearbox 3:1 Ratio (10 kW Max) with Group 2 Pump - Approved Hydraulics Limited
    Regular price £188.05 Ex VAT £225.66 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland

    Aluminium Hydraulic Male Shaft AGRI PTO Gearbox 3:1 Ratio (10 kW Max) with Group 2 Pump

    Key Features

    • Gear ratio: 3 ; 1 step up
    • Power rating: 10 kW maximum
    • Input/output: 540 rpm PTO nominal to ~1620 rpm output
    • Shafts: male 1 3/8 inch 6T PTO input
    • Pump interface: Group 2 pump fitted ; suited to lower flow auxiliary circuits
    • Housing: aluminium body ; compact size for light implements
    Regular price £188.05 Ex VAT £225.66 Inc VAT
    • 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 - Approved Hydraulics Limited
    Regular price From £336.05 Ex VAT From £403.26 Inc VAT
    • 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 £336.05 Ex VAT From £403.26 Inc VAT
    • 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 £31.33 Ex VAT £37.60 Inc VAT
    • 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 £31.33 Ex VAT £37.60 Inc VAT
    • 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 £38.85 Ex VAT £46.62 Inc VAT
    • 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 £38.85 Ex VAT £46.62 Inc VAT
    • 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 £2.15 Ex VAT £2.59 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland

    50L Spool Seal Kit (1 x spool)

    Key Features

    • Compatibility: Hydra Part sectional control valves nominal 50 L/min class ; one spool section
    • Intended use: repack a single working section to cure external leaks and spool drag
    • Typical kit contents: spool o rings ; end cap seals ; dust seals used on 50L sections
    • Valve family: 3/8 inch port sectional valve spares range for 50 LPM systems
    • Install tip: clean bore ; lightly lubricate seals ; verify spool end float after rebuild
    • Result: restores smooth lever or solenoid actuation and reduces leakage to atmosphere
    Regular price £2.15 Ex VAT £2.59 Inc VAT
    • 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 £16.45 Ex VAT £19.74 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland

    HP-20C type Group 2 Pump Seal Kit

    Key Features

    • Compatibility: Hydra Part HP-20C Group 2 gear pumps including common 1.8 taper variants
    • Intended use: replacement of front shaft seal and static seals during pump service
    • Typical kit contents: shaft lip seal ; body o rings and gaskets as required for Group 2 pumps
    • Reference performance: many Group 2 pumps in range rated up to 250 bar continuous service
    • Application: agricultural PTO pumps ; mobile hydraulics ; general industrial systems
    • Service note: inspect shaft journal and bushings ; replace if wear marks exceed spec
    Regular price £16.45 Ex VAT £19.74 Inc VAT
    • 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 £42.05 Ex VAT £50.46 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland

    Baltrotor Seal Kit - GR30, GR30A, GR30PF

    Key Features

    • Compatibility: Baltrotors rotators GR30 ; GR30A ; GR30PF family
    • Rotator type: Grapple rotator with eye upper connection and axle lower mount ; unlimited rotation
    • Intended use: service kit for original seals used in GR30 series rotator heads
    • Typical kit contents: rotary housing ; shaft and port sealing elements needed for leak repair
    • Applications: forestry and small agricultural cranes using GR30 family rotators
    • Fitment note: verify exact GR30 variant before installation to match geometry
    Regular price £42.05 Ex VAT £50.46 Inc VAT
    • 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 £19.96 Ex VAT £23.96 Inc VAT
    • 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 £19.96 Ex VAT £23.96 Inc VAT
    • 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 £21.96 Ex VAT £26.36 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland

    Cylinder Seal kit 30-60/70 series 203/303/403/503

    Key Features

    • Compatibility: Hydra Part cylinder series 203 ; 303 ; 403 ; 503
    • Bore sizes: 30 ; 40 ; 50 ; 60/70 mm range options
    • Intended use: complete reseal kit for the listed cylinder families
    • Typical kit contents: seals for piston ; rod ; and wiper plus static rings as used in cylinder rebuild
    • Applications: compact loaders ; attachments ; light industrial rams within these series
    • Selection note: confirm series and bore from cylinder ID to match the correct kit option
    Regular price £21.96 Ex VAT £26.36 Inc VAT
    • 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 £22.66 Ex VAT £27.20 Inc VAT
    • 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 £22.66 Ex VAT £27.20 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Microswitch (Normally Open x M14 x 1.5 thread) - Approved Hydraulics Limited
    Regular price £14.65 Ex VAT £17.59 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland

    Microswitch (Normally Open x M14 x 1.5 thread)

    Key Features

    • Type: microswitch ; normally open
    • Thread: m14 x 1.5
    • Use: lever position sensing ; electrical signalling on control valves
    • Mounting: screws into dedicated boss on lever box/actuator kit
    • Contact rating: suits low current control circuits ; use relay for higher loads
    Regular price £14.65 Ex VAT £17.59 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 80L Control valve Detent Kit In All 3 Positions - Approved Hydraulics Limited
    Regular price £28.23 Ex VAT £33.88 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland

    80L Control valve Detent Kit In All 3 Positions

    Key Features

    • Series: 80L GS sectional control valve
    • Applications: mobile hydraulics ; loaders ; cranes
    • Compatibility: Hydra Part GS family ; alternative to Walvoil SD series in same size
    • Fluid: mineral oil ; 15–75 cSt operating range
    • Max pressure class: up to 315 bar per series
    Regular price £28.23 Ex VAT £33.88 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • 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.