• Starter Solenoid Cables & Copper bar kit - Approved Hydraulics Limited
    Regular price £3.76
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    Starter Solenoid Cables & Copper bar kit

    Key Features

    • Kit contents: starter cabling ; copper link bar
    • Application: dc power pack starter ; solenoid wiring
    • Voltage: 12 vdc ; 24 vdc systems
    • Use: compact power units ; tail lifts ; tippers ; lifts
    • Hardware: ring terminals ; fixings as supplied
    Regular price £3.76
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    • Order by 3pm for Next Day Delivery
  • Suction Filter 3/8" BSPF 8lpm - Approved Hydraulics Limited
    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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  • Suction pipe horizonal - Approved Hydraulics Limited
    Regular price £1.81
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    Suction pipe horizonal

    Key Features

    • Use: mini power pack component
    • Note: verify variant against datasheet
    • Compatibility: as per title family
    • Application: hydraulic system component
    • Application: hydraulic system component
    Regular price £1.81
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  • 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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  • 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.

  • Cavity Plug - Approved Hydraulics Limited
    Regular price £3.42
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    Cavity Plug

    Key Features

    • Cavity: sae 08 ; 3/4-16 unf
    • Function: blank unused screw in cartridge cavity
    • Sealing: o ring 14.00 x 1.78 mm class
    • Material: steel ; zinc plated
    • Pressure rating: up to 350 bar typical
    • Use: testing ; bypass ; shipping seal
    Regular price £3.42
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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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    • Order by 3pm for Next Day Delivery
  • Check valve Cartridge - Approved Hydraulics Limited
    Regular price £7.92
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    Check valve Cartridge

    Key Features

    • Type: screw in cartridge check valve
    • Cavity: sae 08 ; 3/4-16 unf
    • Function: permits flow 1 -> 2 ; blocks reverse
    • Cracking pressure: 0.3 bar class
    • Use: backflow prevention ; load holding in mini power packs
    Regular price £7.92
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  • Adjustable Flow Valve Cartridge
    Regular price £13.00
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    Adjustable Flow Valve Cartridge

    Key Features

    • Type: adjustable needle flow control
    • Cavity: sae 08 ; 3/4-16 unf
    • Use: meter in ; meter out flow tuning
    • Pressure rating: up to 350 bar class
    • Application: mini power pack manifold
    Regular price £13.00
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  • Relief valve 50 to 250 Bar Range - Approved Hydraulics Limited
    Regular price £11.15
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    Relief valve 50 to 250 Bar Range

    Key Features

    • Adjustment range: 50 ; 250 bar
    • Cavity: sae 08 ; 3/4-16 unf
    • Function: pump pressure protection to tank
    • Max working: up to 350 bar class
    • Application: mini power pack manifold
    Regular price £11.15
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Normally Open Catridge with Manual Overide Button
    Regular price £40.94
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    Normally Open Catridge with Manual Overide Button

    Key Features

    • Valve type: 2/2 poppet normally open
    • Manual override: push button
    • Cavity: sae 08 ; 3/4-16 unf
    • Pressure: up to 350 bar class
    • Flow: up to ~40 l/min class
    • Coil options: 12 vdc ; 24 vdc
    Regular price £40.94
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    • Order by 3pm for Next Day Delivery
  • Normally Closed Catridge for SA Power Pack - Approved Hydraulics Limited
    Regular price £39.00
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    Normally Closed Catridge for SA Power Pack

    Key Features

    • Valve type: 2/2 poppet normally closed
    • Cavity: sae 08 ; 3/4-16 unf
    • Use: single acting power pack hold load
    • Coil options: 12 vdc ; 24 vdc
    • Manual override: available variants
    Regular price £39.00
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 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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    • 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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    • Delivery to UK & Ireland

    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
  • Group 1.0 Pump Side Coupling For Mounting kit for B14 AC motor - Approved Hydraulics Limited
    Regular price £4.55
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    Group 1.0 Pump Side Coupling For Mounting kit for B14 AC motor

    Key Features

    • Pump group: group 1
    • Role: pump side semi coupling ; tang drive
    • Mates with: b14 motor side coupling frames 71 ; 80 ; 90 ; 100/112
    • Use: couples gear pump to motor via elastic drive
    • Application: ac mini power packs
    Regular price £4.55
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    • Order by 3pm for Next Day Delivery
  • 3 kW Drive Coupling - Approved Hydraulics Limited
    Regular price £3.45
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    • Delivery to UK & Ireland

    3 kW Drive Coupling

    Key Features

    • Power rating: 3 kw
    • Role: elastic drive element for motor ; pump coupling
    • Use: b14 mounting kits ; compact power units
    • Compatibility: group 1 pump semi couplings
    • Function: damp torsional vibration ; align drive
    Regular price £3.45
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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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    • Delivery to UK & Ireland

    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
  • Manifold Flange Assembly Screw For Mounting kit for frame 71 & 80 B14 AC motor - Approved Hydraulics Limited
    Regular price £1.86
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    • Delivery to UK & Ireland

    Manifold Flange Assembly Screw For Mounting kit for frame 71 & 80 B14 AC motor

    Key Features

    • Standard: din 912
    • Thread: m8 x 25
    • Use: manifold flange to kit frames 71 ; 80 b14
    • Material: steel
    • Quantity: set of 4 typical
    Regular price £1.86
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Manifold Flange Assembly Screw For Mounting kit for frame 90 & 100/112 B14 AC motor - Approved Hydraulics Limited
    Regular price £1.88
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    • Delivery to UK & Ireland

    Manifold Flange Assembly Screw For Mounting kit for frame 90 & 100/112 B14 AC motor

    Key Features

    • Standard: din 912
    • Thread: m8 x 30
    • Use: manifold flange to kit frames 90 ; 100/112 b14
    • Material: steel
    • Quantity: set of 4 typical
    Regular price £1.88
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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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    • Delivery to UK & Ireland

    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
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Coupling Screw For Mounting kit for frame 71-80 - 90-100/112 B14 AC motor - Approved Hydraulics Limited
    Regular price £1.14
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    • Delivery to UK & Ireland

    Coupling Screw For Mounting kit for frame 71-80 - 90-100/112 B14 AC motor

    Key Features

    • Standard: din 912
    • Thread: m6 x 8
    • Use: secures elastic drive element to semi couplings
    • Compatibility: frames 71 ; 80 ; 90 ; 100/112 b14
    • Note: apply thread lock per assembly guide
    Regular price £1.14
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Plastic plug G1/4 - Approved Hydraulics Limited
    Regular price £1.60
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    • Delivery to UK & Ireland

    Plastic plug G1/4

    Key Features

    • Thread: g 1/4 bspp
    • Type: plastic protective plug
    • Use: blank unused manifold ports
    • Install: finger fit ; remove before service
    • Application: hydraulic system component
    Regular price £1.60
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery

Power Pack Spares & Components for Professional Hydraulic Applications

Discover quality power pack spares & 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. 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.