• MINI Power Pack  1.1 cc/r  Grp 1 pump
    Regular price £86.50
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    MINI Power Pack 1.1 cc/r Grp 1 pump

    Key Features

    • Pump group: group 1 external gear pump
    • Displacement: 1.1 cc/rev
    • Rotation: ccw
    • Use: mini hydraulic power pack builds
    • Compatibility: b14 mounting kits ; group 1 couplings
    Regular price £86.50
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  • MINI Power Pack  0.75 cc/r  Grp 1 pump
    Regular price £59.00
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    MINI Power Pack 0.75 cc/r Grp 1 pump

    Key Features

    • Pump group: group 1 external gear pump
    • Displacement: 0.75 cc/rev
    • Rotation: ccw
    • Use: mini hydraulic power pack builds
    • Compatibility: b14 mounting kits ; group 1 couplings
    Regular price £59.00
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  • Suction Filter 3/8" BSPF 8lpm
    Regular price £3.12
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    Suction Filter 3/8" BSPF 8lpm

    Key Features

    • Connection: 3/8" bspp female
    • Max flow: 8 l/min
    • Type: in tank suction strainer
    • Use: protects pump inlet on mini power packs
    • Installation: screws into suction port inside tank
    Regular price £3.12
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  • 24V - 150AMP Starter + Cables and Copper Bar (Kit)
    Regular price £26.81
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    24V - 150AMP Starter + Cables and Copper Bar (Kit)

    Key Features

    • System voltage: 24 vdc
    • Current class: 150 a
    • Kit contents: starter cables ; copper bar
    • Use: dc power pack motor relay ; battery link
    • Compatibility: mini power packs ; vehicle auxiliary systems
    Regular price £26.81
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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.

  • 12V - 150AMP Starter + Cables and Copper Bar (Kit)
    Regular price £26.81
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    12V - 150AMP Starter + Cables and Copper Bar (Kit)

    Key Features

    • System voltage: 12 vdc
    • Current class: 150 a
    • Kit contents: starter cables ; copper bar
    • Use: dc power pack motor relay ; battery link
    • Compatibility: mini power packs ; vehicle auxiliary systems
    Regular price £26.81
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • CETOP 3 Stackable Valve Mounting Manifold For AC 500050-2   - 3/8" Side Ports
    Regular price £25.23
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    CETOP 3 Stackable Valve Mounting Manifold For AC 500050-2 - 3/8" Side Ports

    Key Features

    • Standard: cetop 3 ; iso 4401-03
    • Side ports: 3/8" bspp
    • Use: stack mounts on ac central manifold 500050-2
    • Function: connects directional valve stack to external pipework
    • Applications: multi station valve assemblies on power packs
    Regular price £25.23
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  • CETOP 3  Spacer 30mm Thick For 500050-2 (AC) Manifold
    Regular price £14.37
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    CETOP 3 Spacer 30mm Thick For 500050-2 (AC) Manifold

    Key Features

    • Category: hydraulic power pack component
    • Use: mobile ; industrial hydraulic circuits
    • Interfaces: bsp threads ; cetop ; b14 per model
    • Notes: see product page for detailed model specific data
    • Status: placeholder; requires deeper model data
    Regular price £14.37
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  • Aluminum Flange For Mounting kit for frame 100/112 B14 AC motor
    Regular price £29.90
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    Aluminum Flange For Mounting kit for frame 100/112 B14 AC motor

    Key Features

    • Material: aluminum
    • Interface: iec b14 motor flange
    • Frame size: 100/112
    • Use: mount ac motor to central manifold ; pump
    • Compatibility: group 1 pump ; matching semi couplings
    Regular price £29.90
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  • Aluminum Flange For Mounting kit for frame 90 B14 AC motor
    Regular price £19.39
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    Aluminum Flange For Mounting kit for frame 90 B14 AC motor

    Key Features

    • Material: aluminum
    • Interface: iec b14 motor flange
    • Frame size: 90
    • Use: mount ac motor to central manifold ; pump
    • Compatibility: group 1 pump ; matching semi couplings
    Regular price £19.39
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    • Order by 3pm for Next Day Delivery
  • Aluminum Flange For Mounting kit for frame 80 B14 AC motor
    Regular price £13.54
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    Aluminum Flange For Mounting kit for frame 80 B14 AC motor

    Key Features

    • Material: aluminum
    • Interface: iec b14 motor flange
    • Frame size: 80
    • Use: mount ac motor to central manifold ; pump
    • Compatibility: group 1 pump ; matching semi couplings
    Regular price £13.54
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    • Order by 3pm for Next Day Delivery
  • Aluminum Flange For Mounting kit for frame 71 B14 AC motor
    Regular price £12.64
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    Aluminum Flange For Mounting kit for frame 71 B14 AC motor

    Key Features

    • Material: aluminum
    • Interface: iec b14 motor flange
    • Frame size: 71
    • Use: mount ac motor to central manifold ; pump
    • Compatibility: group 1 pump ; matching semi couplings
    Regular price £12.64
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • CETOP 3  Spacer 23mm Thick For 500208 (DC) Manifold 500208 - Approved Hydraulics Limited
    Regular price £14.37
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    • Delivery to UK & Ireland

    CETOP 3 Spacer 23mm Thick For 500208 (DC) Manifold 500208

    Key Features

    • Category: hydraulic power pack component
    • Use: mobile ; industrial hydraulic circuits
    • Interfaces: bsp threads ; cetop ; b14 per model
    • Notes: see product page for detailed model specific data
    • Status: placeholder; requires deeper model data
    Regular price £14.37
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Central Manifold For AC Power Pack And 123mm Tank Flange
    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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    • Order by 3pm for Next Day Delivery
  • Hexagon Socket Plug G1/4 - Approved Hydraulics Limited
    Regular price £2.59
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    Hexagon Socket Plug G1/4

    Key Features

    • Thread: g 1/4 bspp
    • Standard: din 908 screw plug ; hex socket with collar
    • Material: steel ; zinc plated
    • Use: blanking of hydraulic manifold ports ; test points
    • Sealing: with soft metal washer ; or bonded seal ; or o ring face
    Regular price £2.59
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  • 18L Plastic Hydraulic Tank 123mm (AC) Neck Flange
    Regular price £42.59
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    18L Plastic Hydraulic Tank 123mm (AC) Neck Flange

    Key Features

    • Capacity: 18 l
    • Neck flange: 123 mm ac
    • Material: plastic
    • Orientation: vertical ; horizontal mounting
    • Use: mini hydraulic power packs reservoir
    • Compatibility: ac motor power pack builds ; 123 mm neck accessories
    Regular price £42.59
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 7L Plastic Hydraulic Tank 123mm (AC) Neck Flange
    Regular price £24.87
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    7L Plastic Hydraulic Tank 123mm (AC) Neck Flange

    Key Features

    • Capacity: 7 l
    • Neck flange: 123 mm ac
    • Material: plastic
    • Orientation: vertical ; horizontal mounting
    • Use: mini hydraulic power packs reservoir
    • Compatibility: ac motor power pack builds ; 123 mm neck accessories
    Regular price £24.87
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    • Order by 3pm for Next Day Delivery
  • 4L Plastic Hydraulic Tank 123mm (AC) Neck Flange
    Regular price £18.79
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    4L Plastic Hydraulic Tank 123mm (AC) Neck Flange

    Key Features

    • Capacity: 4 l
    • Neck flange: 123 mm ac
    • Material: plastic
    • Orientation: vertical ; horizontal mounting
    • Use: mini hydraulic power packs reservoir
    • Compatibility: ac motor power pack builds ; 123 mm neck accessories
    Regular price £18.79
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 18L Plastic Hydraulic Tank 120mm (DC) Neck Flange - Approved Hydraulics Limited
    Regular price £42.59
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    • Delivery to UK & Ireland

    18L Plastic Hydraulic Tank 120mm (DC) Neck Flange

    Key Features

    • Capacity: 18 l
    • Neck flange: 120 mm dc
    • Material: plastic
    • Orientation: vertical ; horizontal mounting
    • Use: mini hydraulic power packs reservoir
    • Compatibility: dc motor power pack builds ; 120 mm neck accessories
    Regular price £42.59
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 13L Plastic Hydraulic Tank 120mm (DC) Neck Flange
    Regular price £33.28
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    13L Plastic Hydraulic Tank 120mm (DC) Neck Flange

    Key Features

    • Capacity: 13 l
    • Neck flange: 120 mm dc
    • Material: plastic
    • Orientation: vertical ; horizontal mounting
    • Use: mini hydraulic power packs reservoir
    • Compatibility: dc motor power pack builds ; 120 mm neck accessories
    Regular price £33.28
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 11L Plastic Hydraulic Tank 120mm (DC) Neck Flange - Approved Hydraulics Limited
    Regular price £30.62
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    11L Plastic Hydraulic Tank 120mm (DC) Neck Flange

    Key Features

    • Capacity: 11 l
    • Neck flange: 120 mm dc
    • Material: plastic
    • Orientation: vertical ; horizontal mounting
    • Use: mini hydraulic power packs reservoir
    • Compatibility: dc motor power pack builds ; 120 mm neck accessories
    Regular price £30.62
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Out of Stock
    8L Plastic Hydraulic Tank 120mm (DC) Neck Flange
    Regular price £28.46
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    8L Plastic Hydraulic Tank 120mm (DC) Neck Flange

    Key Features

    • Capacity: 8 l
    • Neck flange: 120 mm dc
    • Material: plastic
    • Orientation: vertical ; horizontal mounting
    • Use: mini hydraulic power packs reservoir
    • Compatibility: dc motor power pack builds ; 120 mm neck accessories
    Regular price £28.46
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 4.5L Plastic Hydraulic Tank 120mm (DC) Neck Flange - Approved Hydraulics Limited
    Regular price £26.84
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    7L Plastic Hydraulic Tank 120mm (DC) Neck Flange

    Key Features

    • Capacity: 7 l
    • Neck flange: 120 mm dc
    • Material: plastic
    • Orientation: vertical ; horizontal mounting
    • Use: mini hydraulic power packs reservoir
    • Compatibility: dc motor power pack builds ; 120 mm neck accessories
    Regular price £26.84
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 2.5L Plastic Hydraulic Tank 120mm (DC) Neck Flange
    Regular price £19.83
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    2.5L Plastic Hydraulic Tank 120mm (DC) Neck Flange

    Key Features

    • Capacity: 5 l
    • Neck flange: 120 mm dc
    • Material: plastic
    • Orientation: vertical ; horizontal mounting
    • Use: mini hydraulic power packs reservoir
    • Compatibility: dc motor power pack builds ; 120 mm neck accessories
    Regular price £19.83
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1.5L Plastic Hydraulic Tank 120mm (DC) Neck Flange
    Regular price £16.20
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    1.5L Plastic Hydraulic Tank 120mm (DC) Neck Flange

    Key Features

    • Capacity: 5 l
    • Neck flange: 120 mm dc
    • Material: plastic
    • Orientation: vertical ; horizontal mounting
    • Use: mini hydraulic power packs reservoir
    • Compatibility: dc motor power pack builds ; 120 mm neck accessories
    Regular price £16.20
    • 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.