• On Sale
    Hydra Part Standard 90L Lever Operated Monoblock Valves (3/4"BSP) - Approved Hydraulics
    Regular price £331.27
    Regular price £391.97 Sale price Saving 15%
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    5 Bank - Standard 90L Lever Operated Monoblock Valves (3/4"BSP)

    Key Features

    • Ports: 3/4\" bsp p ; a ; b ; t
    • Nominal flow: 90 lpm ; 100 lpm max
    • Max operating pressure: 315 bar
    • Spools: double acting ; spring return to neutral
    • Carry over: hp carry over port optional
    • Banks: 1 to 6 levers
    • Options: cable ; joystick ; pneumatic ; electro-hydraulic kits
    Regular price £331.27
    Regular price £391.97 Sale price Saving 15%
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  • Hydra Part Stabiliser Pad Cages - Approved Hydraulics
    Regular price From £132.92
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    Stabiliser Pad Cages (Premium Quality)

    Key Features

    • Size range: 300 x 300 to 800 x 800 mm pads
    • Capacity: stores 2 stabiliser pads
    • Security: padlock ; chain included
    • Use: stowage for stabiliser pads in transit ; onsite
    • Fitment: sized to match pad dimensions
    Regular price From £132.92
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  • Hydra Part Side Mounted Steel Oil Tanks With Filter (80L-250L) - Approved Hydraulics
    Regular price From £550.27
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    Side Mounted Steel Oil Tanks With Filter (80L-250L)

    Key Features

    • Capacity options: 80 l to 250 l
    • Material: 2 mm steel ; black painted
    • Includes: return filter 25 micron
    • Return filter: 4 different return filter mounting variations.
    • Mounting: side mounted reservoir
    • Testing: pressure tested tank
    Regular price From £550.27
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  • Hydraulic Motors (MV Series) - Approved Hydraulics Limited
    Regular price From £403.48
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    Hydraulic Motors (MV Series)

    Key Features

    • Series: mv high torque
    • Design: gerotor ; geroler low speed high torque motor
    • Mounting: industry standard flanges ; shaft options
    • Use: conveyors ; winches ; agricultural ; forestry ; cranes
    • Ports: side ports ; case drain where required
    • Features: tapered roller bearings for high radial ; axial loads
    • Displacements: 315 cc to 800 cc
    Regular price From £403.48
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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.

  • Hydra Part Hydraulic Motors (MP Series) - Approved Hydraulics
    Regular price From £149.40
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    Hydraulic Motors (MP Series)

    Key Features

    • Series: mp high torque
    • Design: gerotor ; geroler low speed high torque motor
    • Mounting: industry standard flanges ; shaft options
    • Use: conveyors ; winches ; agricultural ; forestry ; cranes
    • Ports: side ports ; case drain where required
    Regular price From £149.40
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  • Hydraulic Motors (MM Series) - Approved Hydraulics Limited
    Regular price From £97.08
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    Hydraulic Motors (MM Series)

    Key Features

    • Series: mm compact
    • Design: gerotor ; geroler low speed high torque motor
    • Mounting: industry standard flanges ; shaft options
    • Use: conveyors ; winches ; agricultural ; forestry ; cranes
    • Ports: side ports ; case drain where required
    • Features: shaft distribution flow ; compact volume ; low weight
    Regular price From £97.08
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  • Hydraulic Motors (MR Series) - Approved Hydraulics Limited
    Regular price From £139.54
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    Hydraulic Motors (MR Series)

    Key Features

    • Series: mr high torque
    • Design: gerotor ; geroler low speed high torque motor
    • Mounting: industry standard flanges ; shaft options
    • Use: conveyors ; winches ; agricultural ; forestry ; cranes
    • Ports: side ports ; case drain where required
    Regular price From £139.54
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    • Order by 3pm for Next Day Delivery
  • Hydraulic Motors (MSY Series) - Approved Hydraulics Limited
    Regular price From £251.68
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    Hydraulic Motors (MSY Series)

    Key Features

    • Series: msy high torque
    • Design: gerotor ; geroler low speed high torque motor
    • Mounting: industry standard flanges ; shaft options
    • Use: conveyors ; winches ; agricultural ; forestry ; cranes
    • Ports: side ports ; case drain where required
    • Displacements: 80 cc to 475 cc
    Regular price From £251.68
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  • Group 3 Gear Pumps with 1:8 Taper Shaft (Threaded Ports) - Approved Hydraulics Limited
    Regular price From £273.29
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    Group 3 Gear Pumps with 1:8 Taper Shaft (Threaded Ports)

    Key Features

    • Type: bi rotational external gear pump
    • Group: 3
    • Shaft: 1.8 taper
    • Configuration: single ; double ; triple options
    • Ports: threaded bsp options
    • Construction: cast iron end covers ; aluminium body
    • Applications: mobile hydraulics ; industrial power units
    Regular price From £273.29
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  • Hydra Part Group 2 Hydraulic Gear Pumps with 1:8 Taper Shaft & Flanged Body - Approved Hydraulics
    Regular price From £74.96
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    Group 2 Hydraulic Gear Pumps with 1:8 Taper Shaft & Flanged Body

    Key Features

    • Type: bi rotational external gear pump
    • Group: 2
    • Shaft: 1.8 taper
    • Configuration: single ; double ; triple options
    • Ports: threaded bsp options
    • Construction: cast iron end covers ; aluminium body
    • Applications: mobile hydraulics ; industrial power units
    Regular price From £74.96
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  • Hydra Part Group 1 Hydraulic Gear Pumps with 1:8 Taper Shaft - Approved Hydraulics
    Regular price From £75.44
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    Group 1 Hydraulic Gear Pumps with 1:8 Taper Shaft (Threaded Ports)

    Key Features

    • Type: bi rotational external gear pump
    • Group: 1
    • Shaft: 1.8 taper
    • Configuration: single ; double ; triple options
    • Ports: threaded bsp options
    • Construction: cast iron end covers ; aluminium body
    • Applications: mobile hydraulics ; industrial power units
    Regular price From £75.44
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  • Hydra Part High Visibility Stabiliser Pads - Approved Hydraulics
    Regular price From £30.90
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    High Visibility Stabiliser Pads

    Key Features

    • Material: uhmwpe
    • Colour: high visibility yellow
    • Point load capacity: 4 t to 160 t range
    • Use: stabiliser ; outrigger pad for cranes ; plant
    • Size options: multiple pad sizes available
    Regular price From £30.90
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  • Hydra Part HP-GP30 Power Take Off Gear Pumps - Approved Hydraulics
    Regular price From £204.00
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    GP30 Power Take Off Gear Pumps

    Key Features

    • Use case: PTO driven hydraulic gear pump for mobile hydraulics; tipping; cranes; auxiliaries
    • Pump type: Hydraulic pump; see title for series and configuration
    • Notes: Specification information is limited in source listing; confirm dimensions and compatibility before purchase
    • Notes: Details not stated
    • Notes: Details not stated
    Regular price From £204.00
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  • Hydra Part 100mm Glycerine Hydraulic Pressure Gauge 0-2300 Psi (160 Bar) 1/2" Bottom Entry - Approved Hydraulics
    Regular price £22.70
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    100mm Glycerine Hydraulic Pressure Gauge 0-2300 Psi (160 Bar) 1/2" Bottom Entry

    Key Features

    • Dial: 100 mm
    • Filling: glycerine filled
    • Entry: 1/2\" bsp bottom entry
    • Scale: psi ; bar dual scale
    • Casing: stainless steel
    • Pressure range: 0-2300 psi ( 160 bar )
    • Intended use: visual pressure readout on hydraulic circuits
    Regular price £22.70
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    • Order by 3pm for Next Day Delivery
  • Hydra Part 100mm Glycerine Hydraulic Pressure Gauge 0-3500 Psi (250 Bar) 1/2" Bottom Entry - Approved Hydraulics
    Regular price £22.70
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    • Delivery to UK & Ireland

    100mm Glycerine Hydraulic Pressure Gauge 0-3500 Psi (250 Bar) 1/2" Bottom Entry

    Key Features

    • Dial: 100 mm
    • Filling: glycerine filled
    • Entry: 1/2\" bsp bottom entry
    • Scale: psi ; bar dual scale
    • Casing: stainless steel
    • Pressure range: 0-3500 psi ( 250 bar )
    • Intended use: visual pressure readout on hydraulic circuits
    Regular price £22.70
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Hydra Part 100mm Glycerine Hydraulic Pressure Gauge 0-1400 Psi (100 Bar) 1/2" Rear Entry - Approved Hydraulics
    Regular price £22.70
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    100mm Glycerine Hydraulic Pressure Gauge 0-1400 Psi (100 Bar) 1/2" Rear Entry

    Key Features

    • Dial: 100 mm
    • Filling: glycerine filled
    • Entry: 1/2\" bsp rear entry
    • Scale: psi ; bar dual scale
    • Casing: stainless steel
    • Pressure range: 0-1400 psi ( 100 bar )
    • Intended use: visual pressure readout on hydraulic circuits
    Regular price £22.70
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Hydra Part 100mm Glycerine Hydraulic Pressure Gauge 0-2300 Psi (160 Bar) 1/2" Rear Entry - Approved Hydraulics
    Regular price £22.70
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    • Delivery to UK & Ireland

    100mm Glycerine Hydraulic Pressure Gauge 0-2300 Psi (160 Bar) 1/2" Rear Entry

    Key Features

    • Dial: 100 mm
    • Filling: glycerine filled
    • Entry: 1/2\" bsp rear entry
    • Scale: psi ; bar dual scale
    • Casing: stainless steel
    • Pressure range: 0-2300 psi ( 160 bar )
    • Intended use: visual pressure readout on hydraulic circuits
    Regular price £22.70
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Hydra Part 100mm Glycerine Hydraulic Pressure Gauge 0-3500 Psi (250 Bar) 1/2" Rear Entry - Approved Hydraulics
    Regular price £22.70
    • All Items Guaranteed
    • Delivery to UK & Ireland

    100mm Glycerine Hydraulic Pressure Gauge 0-3500 Psi (250 Bar) 1/2" Rear Entry

    Key Features

    • Dial: 100 mm
    • Filling: glycerine filled
    • Entry: 1/2\" bsp rear entry
    • Scale: psi ; bar dual scale
    • Casing: stainless steel
    • Pressure range: 0-3500 psi ( 250 bar )
    • Intended use: visual pressure readout on hydraulic circuits
    Regular price £22.70
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Hydra Part 100mm Glycerine Hydraulic Pressure Gauge 0-6000 Psi (400 Bar) 1/2" Bottom Entry - Approved Hydraulics
    Regular price £22.70
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    • Delivery to UK & Ireland

    100mm Glycerine Hydraulic Pressure Gauge 0-6000 Psi (400 Bar) 1/2" Bottom Entry

    Key Features

    • Dial: 100 mm
    • Filling: glycerine filled
    • Entry: 1/2\" bsp bottom entry
    • Scale: psi ; bar dual scale
    • Casing: stainless steel
    • Pressure range: 0-6000 psi ( 400 bar )
    • Intended use: visual pressure readout on hydraulic circuits
    Regular price £22.70
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Hydra Part 100mm Glycerine Hydraulic Pressure Gauge 0-6000 Psi (400 Bar) 1/2" Rear Entry - Approved Hydraulics
    Regular price £42.86
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    • Delivery to UK & Ireland

    100mm Glycerine Hydraulic Pressure Gauge 0-6000 Psi (400 Bar) 1/2" Rear Entry

    Key Features

    • Dial: 100 mm
    • Filling: glycerine filled
    • Entry: 1/2\" bsp rear entry
    • Scale: psi ; bar dual scale
    • Casing: stainless steel
    • Pressure range: 0-6000 psi ( 400 bar )
    • Intended use: visual pressure readout on hydraulic circuits
    Regular price £42.86
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Hydra Part AH454SG Stump Grinder - Approved Hydraulics

    POA

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    AH454SG Stump Grinder

    Key Features

    • Host machines: excavators 5–13 ton; skid steers; wheeled loaders
    • Wheel diameter: 454mm
    • Teeth: 24 replaceable cutters
    • Wheel speed: 1500–2500 rpm
    • Cutting depth: 1200mm max
    • Drive: direct gear motor into heavy duty hub
    • Hydraulics: min flow 60 L/min; min pressure 190 bar
    • Weight: 160kg excluding bracket
    • Use: stump removal; compatible with tiltrotators

    POA

    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice
  • Hydra Part AH354SG Stump Grinder - Approved Hydraulics

    POA

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    AH354SG Stump Grinder

    Key Features

    • Host machines: excavators 1.5–5 ton; skid steers; wheeled loaders
    • Wheel diameter: 354mm
    • Teeth: 16 replaceable cutters
    • Wheel speed: 1500–3000 rpm
    • Cutting depth: 1200mm max
    • Drive: direct gear motor into heavy duty hub
    • Hydraulics: min flow 33 L/min; min pressure 180 bar
    • Weight: 128kg excluding bracket
    • Use: stump removal; works with tiltrotators

    POA

    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice
  • Approved Hydraulics AH800CS Hydraulic Cone Splitter - Approved Hydraulics

    POA

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    AH800CS Hydraulic Cone Splitter

    Key Features

    • Host machines: excavators 8–16 t; backhoes; telehandlers; cranes
    • Weight: ~185 kg excluding hitch
    • Cone: 250 mm diameter x 400 mm long; removable hardened tip
    • Motor torque: up to ~2475 N·m
    • Max log size: ~3 m long x 1.3 m diameter
    • Use: high output splitting of large diameter logs and roots

    POA

    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice
  • Approved Hydraulics AH630CS Hydraulic Cone Splitter - Approved Hydraulics

    POA

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    AH630CS Hydraulic Cone Splitter

    Key Features

    • Host machines: excavators 3–7 t; backhoes; telehandlers; cranes
    • Weight: ~170 kg excluding hitch
    • Cone: 200 mm diameter x 400 mm long; removable hardened tip
    • Motor torque: up to ~2338 N·m
    • Max log size: ~2 m long x 1.1 m diameter
    • Use: splits timber and difficult roots efficiently

    POA

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

Google Shopping for Professional Hydraulic Applications

Discover quality google shopping 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.