• Cylinder Seal Kit for Intermercato TG 12, 16, 19, 16 PRO, 16 EG - Approved Hydraulics Limited
    Regular price £51.79
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    Cylinder Seal kit 50-100/115 series 207/307/407/507

    Key Features

    • Compatibility: Hydra Part cylinder series 207 ; 307 ; 407 ; 507
    • Bore sizes: 50 ; 63 ; 70 ; 80 ; 90 ; 100/115 mm options combined in range
    • Intended use: complete reseal of specified series cylinders during overhaul or preventive maintenance
    • Typical kit contents: piston seal ; rod seal ; wiper ; static o rings as used in cylinder rebuilds
    • Use case: suited to construction ; agricultural and industrial rams within the listed series
    • Fitment check: confirm cylinder plate or purchase record for exact series before fitment
    Regular price £51.79
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    • Order by 3pm for Next Day Delivery
  • 90L Monobloc Valve Motor Spool Type ED-2 Right Inlet
    Regular price £51.12
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    90L Monobloc Valve Motor Spool Type ED-2 Right Inlet

    Key Features

    • Valve: 90L monoblock ; motor spool ED-2
    • Inlet: Right hand inlet
    • Function: Motor spool profile for bidirectional motors
    • Use: Maintained flow to motors ; reduced cavitation risk
    • Additional info: See product data sheet for detailed measurements
    Regular price £51.12
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  • Cylinder Seal Kit for Intermercato TG 12, 16, 19, 16 PRO, 16 EG - Approved Hydraulics Limited
    Regular price £50.46
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    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 £50.46
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  • Seal Kit For Hydra Part MR Motor (Zi) - Approved Hydraulics Limited
    Regular price £50.30
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    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 £50.30
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  • 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.

  • 15L Steel Hydraulic Tank 123mm (AC) Neck Flange - Approved Hydraulics Limited
    Regular price £48.60
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    15L Steel Hydraulic Tank 123mm (AC) Neck Flange

    Key Features

    • Capacity: 15 l
    • Neck flange: 123 mm ac
    • Material: steel
    • Orientation: vertical ; horizontal mounting
    • Use: mini hydraulic power packs reservoir
    • Compatibility: ac motor power pack builds ; 123 mm neck accessories
    Regular price £48.60
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  • 15L Steel Hydraulic Tank 120mm (DC) Neck Flange - Approved Hydraulics Limited
    Regular price £48.60
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    15L Steel Hydraulic Tank 120mm (DC) Neck Flange

    Key Features

    • Capacity: 15 l
    • Neck flange: 120 mm dc
    • Material: steel
    • Orientation: vertical ; horizontal mounting
    • Use: mini hydraulic power packs reservoir
    • Compatibility: dc motor power pack builds ; 120 mm neck accessories
    Regular price £48.60
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    • 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 £48.35
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    Cylinder Seal kit 50-90/100 series 206/306/406/506

    Key Features

    • Compatibility: Hydra Part cylinder series 206 ; 306 ; 406 ; 506
    • Bore sizes: 50 ; 63 ; 70 ; 80/90 ; 100 mm range
    • Intended use: resealing of medium bore cylinders in the specified series to recover performance
    • Typical kit contents: piston ; rod ; wiper and related static seals typical to cylinder service kits
    • Applications: suitable for rams on trailers ; loaders ; compact equipment within these series
    • Fitment check: use the series code stamped on the cylinder to select the correct kit
    Regular price £48.35
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    • Order by 3pm for Next Day Delivery
  • Filler Breather - Approved Hydraulics Limited
    Regular price £48.00
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    Filler Breather

    Key Features

    • Function: vent ; filter air for hydraulic reservoir
    • Interface: flange mount options ; e.g. 83 mm 6 hole pattern
    • Element: replaceable breather element
    • Use: prevents contamination ; equalises tank pressure
    • Application: hydraulic component
    Regular price £48.00
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    • Order by 3pm for Next Day Delivery
  • Central Manifold For AC Power Pack And 123mm Tank Flange - Approved Hydraulics Limited
    Regular price £47.70
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    Central Manifold For AC Power Pack And 123mm Tank Flange

    Key Features

    • Interface: 123 mm tank flange to central manifold
    • System: ac motor power pack
    • Function: routes pump ; return ; relief to cetop stack
    • Compatibility: cetop 3 spacer 30 mm ; stackable manifold 3/8 side ports
    • Use: base for ac mini power pack assemblies
    Regular price £47.70
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  • 240L Control Valve Motor Spool (Type 2)
    Regular price £47.27
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    240L Control Valve Motor Spool (Type 2)

    Key Features

    • Spool type: motor spool type 2
    • Application: bi directional hydraulic motors
    • Behavior: neutral geometry suited to motor load decel
    • Compatibility: 240l valve family
    • Positions: 3 position ; spring return to neutral
    Regular price £47.27
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  • 90L Monoblock Valve Double Acting Spool Type ED-1 Right Inlet
    Regular price £47.23
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    90L Monoblock Valve Double Acting Spool Type ED-1 Right Inlet

    Key Features

    • Valve: 90L monoblock ; double acting cylinder spool ED-1
    • Inlet: Right hand inlet
    • Function: Cylinder spool with power both directions
    • Use: Double acting actuators
    • Additional info: See product data sheet for detailed measurements
    Regular price £47.23
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  • Series 700 Brake Cylinders - Approved Hydraulics Limited
    Regular price £47.20
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    Series 700 Brake Cylinders

    Key Features

    • Application: Hydraulic brake actuation for agricultural ; mobile equipment
    • Rod options: Ø25 mm ; Ø30 mm variants
    • Working pressure: 200 bar nominal ; 250 bar max
    • Speed: 0.5 m/s
    • Temperature range: -25 °C to +80 °C
    • Notes: Fork rod end versions suit bogie braking linkages
    Regular price £47.20
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  • Seal Kit For Hydra Part MR Motor (Zi) - Approved Hydraulics Limited
    Regular price £46.62
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    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 £46.62
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    • Order by 3pm for Next Day Delivery
  • 90L-100L-120L-150L Vontrol Valve Hyd Proportional Pilot kit (81M)
    Regular price £46.43
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    90L-100L-120L-150L Vontrol Valve Hyd Proportional Pilot kit (81M)

    Key Features

    • Function: Hydraulic proportional pilot conversion kit
    • Kit code: 81M
    • Compatibility: 90L ; 100L ; 120L ; 150L valves
    • Use: Remote proportional control of spools
    • Additional info: See product data sheet for detailed measurements
    Regular price £46.43
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    • Order by 3pm for Next Day Delivery
  • 150L Control Valve Single Acting Spool On A Port, (Type 3)  3 positions, B plugged
    Regular price £46.43
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    150L Control Valve Single Acting Spool On A Port, (Type 3) 3 positions, B plugged

    Key Features

    • Spool type: single acting type 3 . a port active ; b port plugged
    • Positions: 3 position ; spring return to neutral
    • Use: single acting cylinders
    • Compatibility: 150l valve family
    • Note: requires appropriate spring kit for single acting
    Regular price £46.43
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  • 80L Control Valve Proportional Hydraulic Pilot Kit Type 8IM - Approved Hydraulics Limited
    Regular price £46.43
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    80L Control Valve Proportional Hydraulic Pilot Kit Type 8IM

    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 £46.43
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    • Order by 3pm for Next Day Delivery
  • 12L Steel Hydraulic Tank 123mm (AC) Neck Flange - Approved Hydraulics Limited
    Regular price £45.90
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    • Delivery to UK & Ireland

    12L Steel Hydraulic Tank 123mm (AC) Neck Flange

    Key Features

    • Capacity: 12 l
    • Neck flange: 123 mm ac
    • Material: steel
    • Orientation: vertical ; horizontal mounting
    • Use: mini hydraulic power packs reservoir
    • Compatibility: ac motor power pack builds ; 123 mm neck accessories
    Regular price £45.90
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 12L Steel Hydraulic Tank 120mm (DC) Neck Flange - Approved Hydraulics Limited
    Regular price £45.90
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    • Delivery to UK & Ireland

    12L Steel Hydraulic Tank 120mm (DC) Neck Flange

    Key Features

    • Capacity: 12 l
    • Neck flange: 120 mm dc
    • Material: steel
    • Orientation: vertical ; horizontal mounting
    • Use: mini hydraulic power packs reservoir
    • Compatibility: dc motor power pack builds ; 120 mm neck accessories
    Regular price £45.90
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Top Link Double Pilot Check Valve 3/8"BSP In Lin - 25Lpm - Approved Hydraulics Ltd
    Regular price £45.46
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    Top Link Double Pilot Check Valve 3/8"BSP In Lin - 25Lpm

    Key Features

    • Application: tractor top link cylinder load holding
    • Type: double pilot operated check
    • Port size: 3/8' bsp
    • Rated flow: 25 to 50 l/min options
    • Use: prevents drift ; allows controlled retraction on pilot
    Regular price £45.46
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    • 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 £45.41
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    Cylinder Seal kit 45-80/90 standard

    Key Features

    • Compatibility: Hydra Part standard double acting cylinders ; bores 45 ; 80/90 mm
    • Intended use: rebuild and reseal standard cylinders to restore pressure integrity and stop external leakage
    • Typical kit contents: piston ; rod ; buffer and wiper seals plus associated o rings for cylinder service
    • Applications: general mobile hydraulics ; loaders ; attachments ; ag and industrial equipment
    • Maintenance note: verify bore ; rod ; and series before ordering to match correct seal sizes
    • Fluid compatibility: formulated for use with mineral hydraulic oils common to mobile machinery
    Regular price £45.41
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    • Order by 3pm for Next Day Delivery
  • 45L - 50L Control Valve Rotary Lever Kit (G)
    Regular price £45.24
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    45L - 50L Control Valve Rotary Lever Kit (G)

    Key Features

    • Type: rotary lever conversion kit
    • Compatibility: 45l ; 50l control valves
    • Operation: lever rotates to actuate spool via cam
    • Benefit: compact side clearance vs straight lever
    • Use: consoles with limited front to back space
    Regular price £45.24
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    • Order by 3pm for Next Day Delivery
  • CETOP 3 Steel Manifold with Relief Cavity - P&T 1/2" - A&B 3/8" - Approved Hydraulics Limited
    Regular price From £45.13
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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 £45.13
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  • MINI Power Pack  Hand pump cartridge 7cc (Only Fits AC Manifold)
    Regular price £45.03
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    MINI Power Pack Hand pump cartridge 7cc (Only Fits AC Manifold)

    Key Features

    • Stroke displacement: 7 cc
    • Fits manifold: ac central manifold only
    • Function: manual emergency operation of circuit
    • Interface: screw in cartridge
    • Use: operate actuator without electric power
    Regular price £45.03
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  • Electro Pneumatic 3/2 valve (N/O) without coil  8EP4 for valve air cylinder manifold kit 30034555 - Approved Hydraulics Limited
    Regular price £44.75
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    Electro Pneumatic 3/2 valve (N/O) without coil 8EP4 for valve air cylinder manifold kit 30034555

    Key Features

    • Voltage: 12 vdc
    • Power: 3 w rating
    • Hole: 9 mm through-bore
    • Body length: 30 mm
    • Ingress protection: IP65
    • Duty: 100% ed
    • Use: electro-pneumatic 8EP3/8EP4 valves
    Regular price £44.75
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Hydra Part for Professional Hydraulic Applications

Discover quality hydra part 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 lever operated monoblock valves, cetop 3 spares, scanreco spares accessories, scanreco 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.