• MINI Power Pack  5.8 cc/r  Grp 1 pump
    Regular price £82.79
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    MINI Power Pack 5.8 cc/r Grp 1 pump

    Key Features

    • Pump group: group 1 external gear pump
    • Displacement: 5.8 cc/rev
    • Rotation: ccw
    • Use: mini hydraulic power pack builds
    • Compatibility: b14 mounting kits ; group 1 couplings
    Regular price £82.79
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  • MINI Power Pack  7 cc/r  Grp 1 pump
    Regular price £90.86
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    MINI Power Pack 7 cc/r Grp 1 pump

    Key Features

    • Pump group: group 1 external gear pump
    • Displacement: 7 cc/rev
    • Rotation: ccw
    • Use: mini hydraulic power pack builds
    • Compatibility: b14 mounting kits ; group 1 couplings
    Regular price £90.86
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  • MINI Power Pack  8.0 cc/r  Grp 1 pump
    Regular price £90.86
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    MINI Power Pack 8.0 cc/r Grp 1 pump

    Key Features

    • Pump group: group 1 external gear pump
    • Displacement: 8.0 cc/rev
    • Rotation: ccw
    • Use: mini hydraulic power pack builds
    • Compatibility: b14 mounting kits ; group 1 couplings
    Regular price £90.86
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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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  • 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.

  • Mini Radio Remote Control 2 Button For Double  Acting Operation 12-24VDC - Approved Hydraulics Limited
    Regular price £103.55
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    Mini Radio Remote Control 2 Button For Double Acting Operation 12-24VDC

    Key Features

    • Control: double acting operation
    • Buttons: 2
    • Supply: 12 vdc ; 24 vdc
    • Interface: radio wireless control
    • Use: remote actuation of mini power packs ; tipper ; liftgate ; winch circuits
    Regular price £103.55
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    • Order by 3pm for Next Day Delivery
  • Mini Radio Remote Control 2 Button For Single Acting Operation 12-24VDC - Approved Hydraulics Limited
    Regular price £103.55
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    Mini Radio Remote Control 2 Button For Single Acting Operation 12-24VDC

    Key Features

    • Mode: single acting operation
    • Buttons: 2
    • Supply: 12 ; 24 vdc
    • Use: compact wireless control
    • Application: hydraulic component
    Regular price £103.55
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  • Mini Radio Remote Control 4 Button For 2 x Double  Actiong Valves Operation 12-24VDC - Approved Hydraulics Limited
    Regular price £106.88
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    Mini Radio Remote Control 4 Button For 2 x Double Actiong Valves Operation 12-24VDC

    Key Features

    • Control: 2 x double acting valves
    • Buttons: 4
    • Supply: 12 vdc ; 24 vdc
    • Interface: radio wireless control
    • Typical applications: multi function mobile hydraulics ; cranes ; tail lifts ; tippers
    Regular price £106.88
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Motor Flange Assembly Screw For Mounting kit for frame 100/112 B14 AC motor - Approved Hydraulics Limited
    Regular price £1.50
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    Motor Flange Assembly Screw For Mounting kit for frame 100/112 B14 AC motor

    Key Features

    • Standard: din 912
    • Thread: m8 x 55
    • Use: motor flange to kit frames 100/112 b14
    • Material: steel
    • Quantity: set of 4 typical
    Regular price £1.50
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Motor Flange Assembly Screw For Mounting kit for frame 71 & 80 B14 AC motor - Approved Hydraulics Limited
    Regular price £1.50
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    Motor Flange Assembly Screw For Mounting kit for frame 71 & 80 B14 AC motor

    Key Features

    • Standard: din 912
    • Thread: m6 x 16
    • Use: motor flange to kit frames 71 ; 80 b14
    • Material: steel
    • Quantity: set of 4 typical
    Regular price £1.50
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Motor Flange Assembly Screw For Mounting kit for frame 90 B14 AC motor - Approved Hydraulics Limited
    Regular price £1.52
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    • Delivery to UK & Ireland

    Motor Flange Assembly Screw For Mounting kit for frame 90 B14 AC motor

    Key Features

    • Standard: din 912
    • Thread: m8 x 16
    • Use: motor flange to kit frame 90 b14
    • Material: steel
    • Quantity: set of 4 typical
    Regular price £1.52
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Seal Kit For Hydra Part MR Motor (Zi) - Approved Hydraulics Limited

    POA

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    Motor Seal Kits (ZHE Model)

    Key Features

    • Compatibility: Hydra Part orbital motors ; ZHE model
    • Motor series: MR ; MV
    • Function: Service kit to renew shaft and housing seals ; restore leak tightness
    • Intended fluid: Mineral hydraulic oils to ISO 11158 HM ; HLP
    • Typical maintenance: Replace aged O-rings ; shaft seal when oil leakage or dust ingress occurs
    • Applications: Orbital motors on mobile equipment ; agricultural implements ; conveyors

    POA

    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice
  • Motor side Coupling For Mounting kit for frame 100/112 B14 AC motor - Approved Hydraulics Limited
    Regular price £17.86
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    Motor side Coupling For Mounting kit for frame 100/112 B14 AC motor

    Key Features

    • Interface: iec b14 motor face
    • Frame size: 100/112
    • Role: motor side semi coupling
    • Mates with: group 1 pump side coupling
    • Use: connect ac motor to gear pump in mounting kit
    Regular price £17.86
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Motor side Coupling For Mounting kit for frame 71 B14 AC motor - Approved Hydraulics Limited
    Regular price £11.21
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    Motor side Coupling For Mounting kit for frame 71 B14 AC motor

    Key Features

    • Interface: iec b14 motor face
    • Frame size: 71
    • Role: motor side semi coupling
    • Mates with: group 1 pump side coupling
    • Use: connect ac motor to gear pump in mounting kit
    Regular price £11.21
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Motor side Coupling For Mounting kit for frame 80 B14 AC motor - Approved Hydraulics Limited
    Regular price £12.64
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    Motor side Coupling For Mounting kit for frame 80 B14 AC motor

    Key Features

    • Interface: iec b14 motor face
    • Frame size: 80
    • Role: motor side semi coupling
    • Mates with: group 1 pump side coupling
    • Use: connect ac motor to gear pump in mounting kit
    Regular price £12.64
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Motor side Coupling For Mounting kit for frame 90 B14 AC motor - Approved Hydraulics Limited
    Regular price £15.19
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    • Delivery to UK & Ireland

    Motor side Coupling For Mounting kit for frame 90 B14 AC motor

    Key Features

    • Interface: iec b14 motor face
    • Frame size: 90
    • Role: motor side semi coupling
    • Mates with: group 1 pump side coupling
    • Use: connect ac motor to gear pump in mounting kit
    Regular price £15.19
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Motor Spool For 50L AK Electric / Lever Operated Valve - Approved Hydraulics Limited
    Regular price £15.25
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    • 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
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Minelli MPM1 Boulder Grabs - Approved Hydraulics

    POA

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    MPM1 Boulder Grabs

    Key Features

    • Type: hydraulic boulder handling grab
    • Jaws: deep profile arms for secure rock clamping
    • Material: high strength wear resistant steel
    • Rotation: optional 360 degree rotator
    • Use: placing ; loading large rocks and boulders

    POA

    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice
  • Minelli MPOS (P) Polyp Grabs - Approved Hydraulics

    POA

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    MPOS (P) Polyp Grabs

    Key Features

    • Type: hydraulic polyp grab for scrap and loose materials
    • Tines: robust shell design for penetration and loading
    • Cylinders: protected layout for harsh environments
    • Rotation: 360 degree continuous rotator option
    • Use: scrap ; waste ; demolition debris handling

    POA

    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice
  • Minelli MPOS 120 Polyp Grab - Approved Hydraulics

    POA

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    • Delivery to UK & Ireland

    MPOS 120 Polyp Grab

    Key Features

    • Type: hydraulic polyp grab for scrap and loose materials
    • Tines: robust shell design for penetration and loading
    • Cylinders: protected layout for harsh environments
    • Rotation: 360 degree continuous rotator option
    • Use: scrap ; waste ; demolition debris handling
    • Capacity: around 120 litre class per model

    POA

    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice
  • Minelli MPOS 300/6 ZL Polyp Grab - Approved Hydraulics

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    MPOS 300/6 ZL Polyp Grab

    Key Features

    • Type: polyp grab for scrap and loose materials
    • Tines: 6 tine layout per model
    • Capacity: 300 litre class per designation
    • Carrier: suits 7 to 12 t excavators or 8 to 14 t m cranes
    • Use: scrap ; waste ; bulk handling

    POA

    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice
  • Minelli MPOS FH Polyp Grabs - Approved Hydraulics

    POA

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    MPOS FH Polyp Grabs

    Key Features

    • Type: hydraulic polyp grab for scrap and loose materials
    • Tines: robust shell design for penetration and loading
    • Cylinders: protected layout for harsh environments
    • Rotation: 360 degree continuous rotator option
    • Use: scrap ; waste ; demolition debris handling
    • Cylinders: horizontal cylinder arrangement for low height

    POA

    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice
  • Minelli MPOS PH Polyp Grabs - Approved Hydraulics

    POA

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    • Delivery to UK & Ireland

    MPOS PH Polyp Grabs

    Key Features

    • Type: hydraulic polyp grab for scrap and loose materials
    • Tines: robust shell design for penetration and loading
    • Cylinders: protected layout for harsh environments
    • Rotation: 360 degree continuous rotator option
    • Use: scrap ; waste ; demolition debris handling
    • Cylinders: horizontal layout with protected housings

    POA

    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice
  • Minelli MPOS PHS Polyp Grabs - Approved Hydraulics

    POA

    • All Items Guaranteed
    • Delivery to UK & Ireland

    MPOS PHS Polyp Grabs

    Key Features

    • Type: hydraulic polyp grab for scrap and loose materials
    • Tines: robust shell design for penetration and loading
    • Cylinders: protected layout for harsh environments
    • Rotation: 360 degree continuous rotator option
    • Use: scrap ; waste ; demolition debris handling
    • Cylinders: horizontal layout with protected housings

    POA

    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice
  • Minelli MPOS PZ Polyp Grabs - Approved Hydraulics

    POA

    • All Items Guaranteed
    • Delivery to UK & Ireland

    MPOS PZ Polyp Grabs

    Key Features

    • Type: hydraulic polyp grab for scrap and loose materials
    • Tines: robust shell design for penetration and loading
    • Cylinders: protected layout for harsh environments
    • Rotation: 360 degree continuous rotator option
    • Use: scrap ; waste ; demolition debris handling
    • Mounting: geometry suitable for Z fold truck cranes

    POA

    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice

All for Professional Hydraulic Applications

Discover quality all 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. Whether you are replacing existing parts or specifying components for a new build, our experienced team can help you find the right product. 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.