• 160LGM Motor Spool
    Regular price £37.65 Ex VAT £45.19 Inc VAT
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    160LGM Motor Spool

    Key Features

    • Spool type: motor spool
    • Valve size: 160 l/min
    • Function: open centre with relief ; anti-cavitation checks typical
    • Use: hydraulic motors ; winch ; conveyor
    • Application: hydraulic system component
    Regular price £37.65 Ex VAT £45.19 Inc VAT
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  • 100L Control Valve Double Acting Spool (Type 1) - Approved Hydraulics Limited
    Regular price £21.78 Ex VAT £26.14 Inc VAT
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    100L Control Valve Double Acting Spool (Type 1)

    Key Features

    • Spool type: double acting type 1
    • Positions: 3 position ; spring return to neutral
    • Neutral: a and b closed in neutral
    • Use: bi directional cylinders
    • Compatibility: 100l valve family
    Regular price £21.78 Ex VAT £26.14 Inc VAT
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  • 100L Control Valve Single Acting  Spool on A Port (Type 3) B Port Plugged - Approved Hydraulics Limited
    Regular price £28.85 Ex VAT £34.62 Inc VAT
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    100L Control Valve Single Acting Spool on A Port (Type 3) B Port Plugged

    Key Features

    • Spool type: single acting type 3 . a port active ; b port plugged
    • Positions: 3 position ; spring return to neutral
    • Use: single acting cylinders
    • Compatibility: 100l valve family
    • Note: pair with correct spring kit as specified
    Regular price £28.85 Ex VAT £34.62 Inc VAT
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  • 100L Control Valve Single Acting  Sppol on B Port  (Type 4) A Port Plugged - Approved Hydraulics Limited
    Regular price £28.85 Ex VAT £34.62 Inc VAT
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    100L Control Valve Single Acting Sppol on B Port (Type 4) A Port Plugged

    Key Features

    • Spool type: single acting type 4 . b port active ; a port plugged
    • Positions: 3 position ; spring return to neutral
    • Use: single acting cylinders
    • Compatibility: 100l valve family
    • Note: fit correct single acting spring kit for operation
    Regular price £28.85 Ex VAT £34.62 Inc VAT
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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.

  • 8EP4 Air manifold (block only) for electro / pneumatic valve operation (Fits all air cylinders) - Approved Hydraulics Limited
    Regular price £4.59 Ex VAT £5.51 Inc VAT
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    8EP4 Air manifold (block only) for electro / pneumatic valve operation (Fits all air cylinders)

    Key Features

    • Function: Pneumatic manifold block for electro ; pneumatic actuation
    • Compatibility: Fits 8EP3/8EP4 air cylinders
    • Use: Remote actuation of hydraulic control valve spools
    • Ports: Multiple pneumatic ports to feed cylinders
    • Additional info: See product data sheet for detailed measurements
    Regular price £4.59 Ex VAT £5.51 Inc VAT
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  • 90L-100L-120L-150L Control valve  3 Position Detent Kit (11) - Approved Hydraulics Limited
    Regular price £20.06 Ex VAT £24.08 Inc VAT
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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 £20.06 Ex VAT £24.08 Inc VAT
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  • 80L-90L-100L-120L-150L control valve Detent Kit 10B Detent In B Position - Approved Hydraulics Limited
    Regular price £34.08 Ex VAT £40.90 Inc VAT
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    80L-90L-100L-120L-150L control valve Detent Kit 10B Detent In B Position

    Key Features

    • Function: Detent in B position ; positions 0 and A spring centered
    • Kit code: 10B
    • Compatibility: 80L ; 90L ; 100L ; 120L ; 150L control valves
    • Use: Hold spool at full B
    • Additional info: See product data sheet for detailed measurements
    Regular price £34.08 Ex VAT £40.90 Inc VAT
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  • 80L-90L-100L-120L-150L control valve Detent Kit (9B)  Detent In A Position - Approved Hydraulics Limited
    Regular price £39.53 Ex VAT £47.44 Inc VAT
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    80L-90L-100L-120L-150L control valve Detent Kit (9B) Detent In A Position

    Key Features

    • Function: Detent in A position ; positions 0 and B spring centered
    • Kit code: 9B
    • Compatibility: 80L ; 90L ; 100L ; 120L ; 150L control valves
    • Use: Hold spool at full A
    • Additional info: See product data sheet for detailed measurements
    Regular price £39.53 Ex VAT £47.44 Inc VAT
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  • Out of Stock
    80L-90L-100L-120L-150L control valve Pneumatic Kit  Cylinder Only (also 8EP3/4 kits) - Approved Hydraulics Limited
    Regular price £87.48 Ex VAT £104.98 Inc VAT
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    80L-90L-100L-120L-150L control valve Pneumatic Kit Cylinder Only (also 8EP3/4 kits)

    Key Features

    • Pressure class: Typically 200-315 bar class
    Regular price £87.48 Ex VAT £104.98 Inc VAT
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  • 90L-120L-100L-150L control valve  (8D2) Dual control spool connector Kit - Approved Hydraulics Limited
    Regular price £40.31 Ex VAT £48.38 Inc VAT
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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 £40.31 Ex VAT £48.38 Inc VAT
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  • 90L-100L-120L-150L Vontrol Valve Hyd Proportional Pilot kit (81M) - Approved Hydraulics Limited
    Regular price £46.43 Ex VAT £55.72 Inc VAT
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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 Ex VAT £55.72 Inc VAT
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  • Out of Stock
    90L - 100L - 120L - 150L Control valve Rotary lever kit - Approved Hydraulics Limited
    Regular price £81.84 Ex VAT £98.21 Inc VAT
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    90L - 100L - 120L - 150L Control valve Rotary lever kit

    Key Features

    • Function: Rotary lever kit for manual actuation
    • Compatibility: 90L ; 100L ; 120L ; 150L valves
    • Use: Compact lever actuation of work sections
    • Additional info: See product data sheet for detailed measurements
    • Actuation geometry: Rotary to linear conversion via clevis lever
    Regular price £81.84 Ex VAT £98.21 Inc VAT
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  • 90L - 100L - 120L -150L Control Valve  End Cap With Stroke Limiter - Approved Hydraulics Limited
    Regular price £13.05 Ex VAT £15.66 Inc VAT
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    90L - 100L - 120L -150L Control Valve End Cap With Stroke Limiter

    Key Features

    • Function: End cap with adjustable stroke limiter
    • Compatibility: 90L ; 100L ; 120L ; 150L valves
    • Use: Limit spool travel ; control flow or cylinder stroke
    • Additional info: See product data sheet for detailed measurements
    • Adjustment method: Threaded limiter screws with lock nuts
    Regular price £13.05 Ex VAT £15.66 Inc VAT
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  • 90L 100L 120L 150L Control Valve Remote Cable Connection Kit - Approved Hydraulics Limited
    Regular price £30.00 Ex VAT £36.00 Inc VAT
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    90L 100L 120L 150L Control Valve Remote Cable Connection Kit

    Key Features

    • Actuation: remote flexible cable control for spool operation
    • Compatibility: 90l ; 100l ; 120l ; 150l valve families
    • Interface: lever box ; joystick cable systems
    • Intended use: relocate spool control away from valve for operator ergonomics
    • Notes: kit components may vary ; verify cable length and end fittings per installation
    Regular price £30.00 Ex VAT £36.00 Inc VAT
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  • 90L - 100L - 120 - 150L Control Valve End Cap - Approved Hydraulics Limited
    Regular price £4.00 Ex VAT £4.80 Inc VAT
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    90L - 100L - 120 - 150L Control Valve End Cap

    Key Features

    • Function: end cap for spool section ; closes body and retains hardware
    • Compatibility: 90l ; 100l ; 120l ; 150l valve families
    • Options: with stroke limiter ; without stroke limiter
    • Maintenance: allows access to spring or detent kits
    • Typical use: service replacement to restore manual lever feel
    Regular price £4.00 Ex VAT £4.80 Inc VAT
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  • Out of Stock
    90L-100L-120L-150L Control Valve Lever Box - Approved Hydraulics Limited
    Regular price £15.35 Ex VAT £18.43 Inc VAT
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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 £15.35 Ex VAT £18.43 Inc VAT
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  • 90L - 120L -100L - 120L -150L Control Valve End cap spring kit. - Approved Hydraulics Limited
    Regular price £22.18 Ex VAT £26.62 Inc VAT
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    90L - 120L -100L - 120L -150L Control Valve End cap spring kit.

    Key Features

    • Purpose: spring return kit for lever operated spools
    • Compatibility: 90l ; 100l ; 120l ; 150l valve families
    • Function: restores neutral centering force on spool
    • Typical maintenance: used when lever fails to return to center
    • Installation: fits behind end cap on spool end
    Regular price £22.18 Ex VAT £26.62 Inc VAT
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  • Out of Stock
    80L- 90L- 100L - 120L Control Valve Relief Cart 20- 315 BAR - Approved Hydraulics Limited
    Regular price £35.90 Ex VAT £43.09 Inc VAT
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    80L- 90L- 100L - 120L Control Valve Relief Cart 20- 315 BAR

    Key Features

    • Type: adjustable pressure relief cartridge
    • Set range: 20 ; 315 bar
    • Compatibility: 80l ; 90l ; 100l ; 120l ; 150l ; 160l valve families
    • Role: protects circuit by limiting inlet or service port pressure
    • Use: maintenance replacement for OEM cartridge
    Regular price £35.90 Ex VAT £43.09 Inc VAT
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  • 24V Elec/Air Solenoid for 8EP3 -4 kit  4.8W IP65 100% ED - Coil 9mm Hole x 30mm long - Approved Hydraulics Limited
    Regular price £8.35 Ex VAT £10.03 Inc VAT
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    24V Elec/Air Solenoid for 8EP3 -4 kit 4.8W IP65 100% ED - Coil 9mm Hole x 30mm long

    Key Features

    • Voltage: 24 vdc
    • Power: 4.8 w
    • Protection: ip65
    • Duty cycle: 100% ed
    • Core tube fit: 9 mm bore ; 30 mm length
    • Application: 8ep3 ; 8ep4 electro pneumatic kits
    Regular price £8.35 Ex VAT £10.03 Inc VAT
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  • 80L-100L-150L Control Valve Carry Over Plug  3/8" - Approved Hydraulics Limited
    Regular price £1.61 Ex VAT £1.94 Inc VAT
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    80L-100L-150L Control Valve Carry Over Plug 3/8"

    Key Features

    • Function: high pressure carry over ; power beyond
    • Thread: 3/8" bsp
    • Compatibility: 80l ; 100l ; 150l valve families
    • Use case: connect upstream valve to downstream control valve
    • System rating: for host valves operating to 315 bar
    Regular price £1.61 Ex VAT £1.94 Inc VAT
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  • 80L-100L-150L Control Valve  3/8" Tapered Grub Screw For Carry-over Facility - Approved Hydraulics Limited
    Regular price £1.68 Ex VAT £2.02 Inc VAT
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    80L-100L-150L Control Valve 3/8" Tapered Grub Screw For Carry-over Facility

    Key Features

    • Part: tapered grub screw for carry over facility
    • Thread: 3/8"
    • Compatibility: 80l ; 100l ; 150l valve families
    • Purpose: secures or blanks internal carry over drilling
    • Use: fitted during conversion to power beyond or closed centre
    Regular price £1.68 Ex VAT £2.02 Inc VAT
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  • 100L Control Valve  A & B Port Reliefs Blanking Plug - Approved Hydraulics Limited
    Regular price £5.91 Ex VAT £7.10 Inc VAT
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    100L Control Valve A & B Port Reliefs Blanking Plug

    Key Features

    • Part: blanking plug for a ; b service port relief cavities
    • Compatibility: 100l sectional control valve
    • Function: blocks relief cavity when relief not fitted
    • Use: system using external over pressure protection
    • Maintenance: service replacement component
    Regular price £5.91 Ex VAT £7.10 Inc VAT
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  • 100L Control Valve  Pressure Compensated Flow Divider Section Type DFG - Approved Hydraulics Limited
    Regular price £414.65 Ex VAT £497.59 Inc VAT
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    100L Control Valve Pressure Compensated Flow Divider Section Type DFG

    Key Features

    • Section type: pressure compensated flow divider . dfg
    • Function: splits inlet flow at fixed ratio independent of load
    • Compatibility: 100l gs sectional valve system
    • Use: parallel tool operation with balanced speeds
    • Integration: installs as intermediate working section
    Regular price £414.65 Ex VAT £497.59 Inc VAT
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  • 100L Control Valve Right Inlet Section 3/4" Type ( Type BC) - Approved Hydraulics Limited
    Regular price £70.46 Ex VAT £84.56 Inc VAT
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    100L Control Valve Right Inlet Section 3/4" Type ( Type BC)

    Key Features

    • Section: right inlet section . type bc
    • Ports: 3/4" bsp
    • Function: supply inlet with main relief valve cavity
    • Compatibility: 100l gs sectional systems
    • Orientation: right hand inlet configuration
    Regular price £70.46 Ex VAT £84.56 Inc VAT
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3/4" - 100Lpm - Sectional Valve Spares for Professional Hydraulic Applications

Discover quality 3/4" 100lpm sectional valve spares 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.