• 90L Monobloc valve single Acting Detent  (A Blanked)
    Regular price £38.63
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    90L Monobloc valve single Acting Detent (A Blanked)

    Key Features

    • Valve platform: 90 l/min monoblock directional valve
    • Spool function: single-acting; a-port blanked
    • Detent: mechanical detent on return stroke
    • Port threads: typically 1/2" bsp p;t;a;b
    • Use: operate single-acting cylinders e.g. tipping
    • Accessories: spring/detent kit 30075376 family
    Regular price £38.63
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  • 90L Monoblock 2 Bank With 1 D/A Spool And 1 Float Spool - Approved Hydraulics Limited
    Regular price £136.22
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    90L Monoblock 2 Bank With 1 D/A Spool And 1 Float Spool

    Key Features

    • Bank count: 2 bank monoblock body
    • Spool set: 1 double acting ; 1 float spool
    • Flow rating: 90 l/min class
    • Control: manual lever operation
    • Feature: float position for implement follow over ground contours
    • Options: power beyond ; cable control kits
    • Applications: loader raise ; lower ; tilt or auxiliary circuits
    Regular price £136.22
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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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  • 90L-100L-120L-150L Control valve  3 Position Detent Kit (11) - Approved Hydraulics Limited
    Regular price £24.08
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    90L-100L-120L-150L Control valve 3 Position Detent Kit (11)

    Key Features

    • Function: 3 position detent ; holds spool in forward and reverse
    • Compatibility: 90L ; 100L ; 120L ; 150L control valves
    • Use: Motor circuits needing maintained actuation or float
    • Install: Replaces end cap hardware on selected spool
    • Additional info: See product data sheet for detailed measurements
    Regular price £24.08
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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.

  • Out of Stock
    90L-100L-120L-150L Control Valve Lever Box
    Regular price £15.36
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    90L-100L-120L-150L Control Valve Lever Box

    Key Features

    • Function: manual lever actuator housing for spool control
    • Compatibility: 90l ; 100l ; 120l ; 150l valve families
    • Adjustment: stroke limiter versions available
    • Lever interface: m10 threaded lever rod
    • Installation: mounts to spool end in place of other actuators
    Regular price £15.36
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  • 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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  • 90L-120L-100L-150L control valve  (8D2) Dual control spool connector Kit
    Regular price £40.32
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    90L-120L-100L-150L control valve (8D2) Dual control spool connector Kit

    Key Features

    • Function: Dual control spool connector
    • Kit code: 8D2
    • Compatibility: 90L ; 100L ; 120L ; 150L valves
    • Use: Mechanically link two control inputs to one spool
    • Additional info: See product data sheet for detailed measurements
    Regular price £40.32
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  • 90LS & 90L Single Microswitch Kit  (Req's switch N/O 30075320 or N/C 20010687 extra as needed - Not included)
    Regular price £42.58
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    90LS & 90L Single Microswitch Kit (Req's switch N/O 30075320 or N/C 20010687 extra as needed - Not included)

    Key Features

    • Function: Single microswitch to detect spool actuation
    • Compatibility: 90L ; 90LS control valves
    • Contacts: N/O or N/C switch options required separately
    • Use: Electrical signal for interlocks ; indicators
    • Additional info: See product data sheet for detailed measurements
    Regular price £42.58
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  • 90LS & 90L Single Microswitch Kit  (Req's switch N/O 30075320 or N/C 20010687 extra as needed - Not included)
    Regular price £61.56
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    90LS & 90L Single Microswitch Kit (Req's switch N/O 30075320 or N/C 20010687 extra as needed - Not included)

    Key Features

    • Part number: 30075562
    • Compatibility: 90LS; 90L valve families; also 45L; 50L; 80L; 100L; 150L
    • Kit type: Single microswitch mounting kit for control valve
    • Switch required: Requires N/O 30075320 or N/C 20010687 microswitch; not included
    • Function: Provides electrical signal based on spool position or actuation
    • Typical use: Indicators; interlocks; automation on hydraulic control levers
    Regular price £61.56
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  • 90° UNIDIRECTIONAL FLOW REGULATOR 3/8" BSP - Pressure Compensated
    Regular price £60.74
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    90° UNIDIRECTIONAL FLOW REGULATOR 3/8" BSP - Pressure Compensated

    Key Features

    • Ports: G 3/8 BSPP
    • Function: 90 deg elbow flow regulator with check valve
    • Compensation: pressure compensated A->B ; free reverse via check
    • Max flow A->B: 30 l.min typical at 3/8 size
    • Max pressure: 250 bar
    • Body: zinc plated steel ; alloy handknob
    • Applications: speed control of cylinder or motor in one direction
    Regular price £60.74
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  • Hydra Part 90º Rotary Swivel Joint - Approved Hydraulics
    Regular price From £29.00
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    90º Rotary Swivel Joint

    Key Features

    • Type: 90 degree rotary swivel joint
    • Installation: between hose and rigid component
    • Function: allows occasional rotation ; reduces hose stress
    • Ports: bsp female sizes
    • Typical applications: hose routing on mobile plant
    Regular price From £29.00
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  • Out of Stock
    ABER 1" Tipping Valve; Open Circuit 200L; Relief Valve with 2 Pressure Ranges; W / Pneumatic Selector
    Regular price £349.68
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    ABER 1" Tipping Valve; Open Circuit 200L; Relief Valve with 2 Pressure Ranges; W / Pneumatic Selector

    Key Features

    • Valve type: tipping valve (open circuit)
    • Port size: 1" BSP
    • Max flow: 200 l/min
    • Relief valve: two pressure ranges
    • Control: pneumatic selector
    • Application: single-acting tipping gear
    • Ports: pressure; cylinder; tank with pilot port
    • Descent: progressive descent
    Regular price £349.68
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  • Out of Stock
    ABER ADMISSION CONNECTOR 1/14'' PIPE 2 STRAIGHT
    Regular price £25.12
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    ABER ADMISSION CONNECTOR 1/14'' PIPE 2 STRAIGHT

    Key Features

    • Component: pump admission connector
    • Connections: 1 1/4" pipe to 2" straight hose tail
    • Form: straight
    • Intended use: pump inlet/suction side
    • Design: smooth bore to minimise inlet losses
    • Compatibility: ABER pump suction fittings
    Regular price £25.12
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  • ABER B2 Gear Pumps - Approved Hydraulics Limited
    Regular price From £251.34
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    ABER B2 Gear Pumps

    Key Features

    • Displacement: ~8–39 cm³/rev
    • Max pressure: up to 250–300 bar (model dependent)
    • Mount: UNI 3-bolt (European standard)
    • Rotation: CW or CCW (bi-rotational options)
    • Shaft: 6-spline
    • Ports: BSP threaded (3/4"–1")
    • Application: light/medium-duty mobile hydraulics
    Regular price From £251.34
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  • ABER B3 Gear Pumps - Approved Hydraulics Limited
    Regular price From £322.86
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    ABER B3 Gear Pumps

    Key Features

    • Displacement: ~42–102 cm³/rev
    • Max pressure: up to ~300 bar
    • Mount: ISO 4-bolt (pump PTO interface)
    • Shaft: 8-tooth spline
    • Rotation: CW/CCW options
    • Ports: BSP threaded (1"–1 1/4")
    • Application: high-flow truck hydraulics (tippers, cranes)
    Regular price From £322.86
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  • ABER BENT AXIS PISTON PUMP 140cc/rot - Approved Hydraulics Limited
    Regular price £1,319.62
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    ABER BENT AXIS PISTON PUMP 140cc/rot

    Key Features

    • Series: BI (bent axis piston, fixed displacement)
    • Displacement: 140 cc/rot
    • Max working pressure: up to 350 bar
    • Performance: high efficiency with very low noise
    • Flow characteristics: continuous, low pulsation
    • Mounting: direct PTO mount (except two‑shaft PTOs without support)
    • Typical applications: tippers, cranes, mobile hydraulics
    Regular price £1,319.62
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  • ABER Bent Axis Piston Pumps - Approved Hydraulics Limited
    Regular price From £572.78
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    ABER Bent Axis Piston Pumps

    Key Features

    • Displacement range: ~17–172 cm³/rev (series dependent)
    • Max working pressure: up to 350 bar (400 bar peak)
    • Efficiency/noise: high volumetric efficiency; low noise
    • Rotation: reversible (CW/CCW options)
    • Mounting: PTO direct-mount for truck hydraulics
    • Flange/shaft: 4-bolt, 8-tooth spline (DIN 5482 style)
    • Typical use: tippers, cranes, high-pressure mobile hydraulics
    • Lubrication: case drain required
    Regular price From £572.78
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  • Aber Hydraulic Piston Pumps Bic | Compact Bent Axis Piston Pump - 17cm3/Rev. To 110cm3/Rev. - Approved Hydraulics Limited
    Regular price From £622.44
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    Aber Hydraulic Piston Pumps Bic | Compact Bent Axis Piston Pump - 17cm3/Rev. To 110cm3/Rev.

    Key Features

    • Displacement range: 7–110 cm³/rev
    • Max operating pressure: 400 bar
    • Rotation: reversible (CW/CCW options)
    • Flange/shaft: 4-bolt, spline (DIN 5462 style)
    • Typical use: tippers, cranes, high-pressure mobile hydraulics
    Regular price From £622.44
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  • ABER ISO (4 BOLTS) PTO TO OUTPUT SHAFT SAE 1100 ADAPTOR, WITH ONE BEARINGS
    Regular price £141.77
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    ABER ISO (4 BOLTS) PTO TO OUTPUT SHAFT SAE 1100 ADAPTOR, WITH ONE BEARINGS

    Key Features

    • Input: ISO 4-bolt / 8-spline PTO
    • Output flange: SAE 1100
    • Support: single bearing
    • Purpose: convert close-coupled PTO to prop-shaft drive
    • Use: lighter-duty cardan shaft applications
    • Note: choose two-bearing versions for higher overhung loads
    Regular price £141.77
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  • Out of Stock
    ABER ISO (4 BOLTS) PTO TO OUTPUT SHAFT SAE 1300 ADAPTOR, WITH TWO BEARINGS
    Regular price £166.98
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    ABER ISO (4 BOLTS) PTO TO OUTPUT SHAFT SAE 1300 ADAPTOR, WITH TWO BEARINGS

    Key Features

    • Input: ISO 4-bolt / 8-spline PTO
    • Output flange: SAE 1300
    • Support: two bearings for overhung load
    • Purpose: convert close-coupled PTO to prop-shaft drive
    • Flange diameter: ~97 mm (SAE 1300 class)
    • Use: transmit torque to remote pump or accessory
    Regular price £166.98
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  • Out of Stock
    ABER ISO (4 BOLTS) PTO TO OUTPUT SHAFT SAE 1400 ADAPTOR, WITH TWO BEARINGS - Approved Hydraulics Limited
    Regular price £174.88
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    ABER ISO (4 BOLTS) PTO TO OUTPUT SHAFT SAE 1400 ADAPTOR, WITH TWO BEARINGS

    Key Features

    • Input: ISO 4-bolt PTO interface
    • Output: SAE 1400 flange
    • Support: two bearings for overhung load
    • Purpose: convert close-coupled PTO to prop-shaft drive
    • Benefit: reduces side-load on PTO and pump
    • Use: remote accessory drive via cardan shaft
    Regular price £174.88
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  • TF ISUZU MZW6P; 3 EIXOS; COMANDO PNEUMATICO; C/ SE - Approved Hydraulics Limited
    Regular price £509.95
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    ABER ISUZU PTO; MYY - 5T ; MYY - 6S ; MYY-6P ; MOH25 ; MOH30 ; MOY-9K; 1:1; Vacuum

    Key Features

    • Gearbox compatibility: MYY‑5T/MYY‑6S/MYY‑6P/MOH25/MOH30/MOY‑9K
    • Control: vacuum
    • PTO ratio: 1.1
    • ABER reference: TF3008V series
    • Mounting: side‑mount to Isuzu gearbox PTO aperture
    • Pump interface: UNI/ISO direct‑mount
    • Sensor: on/off sensor option available
    Regular price £509.95
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  • ABER MECHANICAL SENSOR-2 PINS
    Regular price £33.34
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    ABER MECHANICAL SENSOR-2 PINS

    Key Features

    • Type: mechanical position/status sensor
    • Connector: 2 pins
    • Signal: on/off (binary) output
    • Use: PTO engaged/disengaged indication
    • Installation: screws into dedicated sensor port
    Regular price £33.34
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  • Aber Pneumatic Cab Control Units - Approved Hydraulics Limited
    Regular price From £72.83
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    Aber Pneumatic Cab Control Units

    Key Features

    • Function: in-cab pneumatic control for PTO and tipping valve
    • Controls: 3–6 lever options (raise/lower, PTO on/off, body lock)
    • Operation: air-actuated (pneumatic) with panel-mounted levers
    • Connections: push-in tube fittings for nylon air line
    • Power: indicator/switch options for 12/24 V systems
    • Use case: tipper bodies, skip loaders, recovery beds
    Regular price From £72.83
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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.