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    Hydra Part Fuel Nozzle (Gravity Fed) 1"BSP Fitting - Approved Hydraulics
    Regular price £85.05 Ex VAT £102.06 Inc VAT
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    Fuel Nozzle (Gravity Fed) 1"BSP Fitting

    Key Features

    • Type: fuel dispensing nozzle
    • Mode: gravity fed
    • Connection: 1" bsp fitting
    • Use: diesel ; heating oil ; kerosene per nozzle spec
    • Notes: choose nozzle to match flow source ; pump or gravity
    Regular price £85.05 Ex VAT £102.06 Inc VAT
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  • Hydra Part Worm Drives including Hydraulic Motor - Approved Hydraulics
    Regular price From £1,387.55 Ex VAT From £1,665.06 Inc VAT
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    Worm Drives

    Key Features

    • Output torque: 3.3 kN.m - 34 kN.m
    • Tilting moment torque: 11.8 kN.m - 310 kN.m
    • Holding torque: 6.5 kN.m - 158.3 kN.m
    • Weight: 35 Kg - 202 Kg
    Regular price From £1,387.55 Ex VAT From £1,665.06 Inc VAT
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  • Hydra Part Hammer Style Post Drivers - Approved Hydraulics

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    Hammer Style Post Drivers

    Key Features

    • Notes: Specification information is limited in source listing; confirm dimensions and compatibility before purchase
    • Notes: Details not stated
    • Notes: Details not stated
    • Notes: Details not stated
    • Notes: Details not stated

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  • Approved Hydraulics AH469PD Vibrating Post Driver - Approved Hydraulics

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    AH469PD Vibrating Post Driver

    Key Features

    • Attachment: excavator vibrating post driver
    • Centrifugal force: 45 kn at 50 hz ; amplitude 2.10 mm
    • Reduced force mode: 22 kn at 35 hz ; amplitude 3.75 mm
    • Hydraulic requirement: min 26 lpm @ 166 bar
    • Post sizes: 4" ; 6" ; 9" cups ; bespoke options
    • Weight: 245 kg approx
    • Supplied with: hitch bracket ; hoses ; qr couplers ; spare buffers ; 2 cups

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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
    Single Counterbalance Valve 3/8" In Line - 100-350Bar - Approved Hydraulics Limited
    Regular price £76.99 Ex VAT £92.39 Inc VAT
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    Single Counterbalance Valve 3/8" In Line - 100-350Bar

    Key Features

    • Type: single counterbalance ; overcentre valve
    • Port size: 3/8"
    • Adjustment range: 100 to 350 bar
    • Pilot ratio: 1 . 8 ; 4.2 . 1 options
    • Body: steel body
    • Function: load holding ; controlled lowering ; relief overpressure
    • Mounting: in line
    • Typical applications: boom ; stabiliser legs ; winch loads
    Regular price £76.99 Ex VAT £92.39 Inc VAT
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  • Hydra Part 3/4"BSP Dual Cross-over 80Lpm Relief Valve - 130-350Bar - Approved Hydraulics
    Regular price £80.31 Ex VAT £96.38 Inc VAT
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    3/4"BSP Dual Cross-over 80Lpm Relief Valve - 130-350Bar

    Key Features

    • Type: dual cross line relief valve
    • Port size: 3/4"bsp
    • Rated flow: 80 lpm
    • Adjustment range: 130 to 350 bar
    • Function: protects hydraulic motors from shock loads ; cross connected relief
    • Mounting: in line ; flangeable to motor on some models
    • Typical use: omp ; omr ; omh motor protection ; overrunning load control
    Regular price £80.31 Ex VAT £96.38 Inc VAT
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  • Out of Stock
    Hydra Part 3/8"BSP Dual Cross-over 35Lpm Relief Valve - 100-350Bar - Approved Hydraulics
    Regular price £91.14 Ex VAT £109.37 Inc VAT
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    3/8"BSP Dual Cross-over 35Lpm Relief Valve - 100-350Bar

    Key Features

    • Type: dual cross line relief valve
    • Port size: 3/8"bsp
    • Rated flow: 35 lpm
    • Adjustment range: 100 to 350 bar
    • Function: protects hydraulic motors from shock loads ; cross connected relief
    • Mounting: in line ; flangeable to motor on some models
    • Typical use: omp ; omr ; omh motor protection ; overrunning load control
    Regular price £91.14 Ex VAT £109.37 Inc VAT
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  • Out of Stock
    Hydra Part CETOP 5 Pressure Reducing Module Valve - B to T (ZPR-10-D-B-1-210-YM) - Approved Hydraulics
    Regular price £101.40 Ex VAT £121.68 Inc VAT
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    CETOP 5 Pressure Reducing Module Valve - B to T (ZPR-10-D-B-1-210-YM)

    Key Features

    • Interface: iso 4401-05 cetop 5 ng10
    • Function: pressure reducing module b to t
    • Max operating pressure: 315 bar
    • Secondary pressure: 210 bar
    • Max flow: 60 lpm
    • Temperature: -20 c to +80 c
    Regular price £101.40 Ex VAT £121.68 Inc VAT
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  • Hydra Part CETOP 5 Pressure Reducing Module - A to T (ZPR-10-D-A-1-210-YM) - Approved Hydraulics
    Regular price £128.28 Ex VAT £153.94 Inc VAT
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    CETOP 5 Pressure Reducing Module - A to T (ZPR-10-D-A-1-210-YM)

    Key Features

    • Interface: iso 4401-05 cetop 5 ng10
    • Function: pressure reducing module a to t
    • Max operating pressure: 315 bar
    • Secondary pressure: 210 bar
    • Max flow: 60 lpm
    • Temperature: -20 c to +80 c
    Regular price £128.28 Ex VAT £153.94 Inc VAT
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    • Order by 3pm for Next Day Delivery
  • Out of Stock
    Hydra Part 100mm Glycerine Hydraulic Pressure Gauge 0-2000 Psi (140 Bar) 1/2" Bottom Entry - Approved Hydraulics
    Regular price £24.45 Ex VAT £29.34 Inc VAT
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    100mm Glycerine Hydraulic Pressure Gauge 0-2000 Psi (140 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: 0-2000 psi ( 140 bar )
    • Intended use: visual pressure readout on hydraulic circuits
    Regular price £24.45 Ex VAT £29.34 Inc VAT
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  • Out of Stock
    Hydra Part 100mm Glycerine Hydraulic Pressure Gauge 0-2000 Psi (140 Bar) 1/2" Rear Entry - Approved Hydraulics
    Regular price £24.45 Ex VAT £29.34 Inc VAT
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    100mm Glycerine Hydraulic Pressure Gauge 0-2000 Psi (140 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: 0-2000 psi ( 140 bar )
    • Intended use: visual pressure readout on hydraulic circuits
    Regular price £24.45 Ex VAT £29.34 Inc VAT
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    • Order by 3pm for Next Day Delivery
  • Hydra Part 250L GS Sectional Control Valve - Approved Hydraulics

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    240L GS Sectional Control Valve

    Key Features

    • Type: sectional directional valve
    • Nominal flow: 240 lpm
    • Sections: 1 to 12
    • Integrated valves: main relief ; load check on each section
    • Circuit options: parallel ; tandem ; series
    • Carry over: hp carry over port optional
    • Spool control: manual ; pneumatic ; hydraulic ; electro-hydraulic ; remote cable

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  • Hydra Part SV80 Sequence Valve 1/2" Bsp - 80Lpm - 100-350 Bar - Approved Hydraulics
    Regular price £70.85 Ex VAT £85.03 Inc VAT
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    SV80 Sequence Valve 1/2" Bsp - 80Lpm - 100-350 Bar

    Key Features

    • Port size: 1/2\" bsp
    • Max flow: 80 lpm
    • Pressure ranges: 10-70 ; 20-210 ; 70-350 bar
    • Function: inline sequence valve to control actuator order
    • Adjustment: hand knob ; tamper proof cap options
    Regular price £70.85 Ex VAT £85.03 Inc VAT
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  • Hydra Part 150L GS Sectional Control Valve - Approved Hydraulics

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    150L GS Sectional Control Valve

    Key Features

    • Type: sectional directional valve
    • Nominal flow: 150 lpm
    • Sections: 1 to 12
    • Integrated valves: main relief ; load check on each section
    • Circuit options: parallel ; tandem ; series
    • Carry over: hp carry over port optional
    • Spool control: manual ; pneumatic ; hydraulic ; electro-hydraulic ; remote cable

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  • Hydra Part 100L GS Sectional Control Valve - Approved Hydraulics

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    100L GS Sectional Control Valve

    Key Features

    • Type: sectional directional valve
    • Nominal flow: 100 lpm
    • Sections: 1 to 12
    • Integrated valves: main relief ; load check on each section
    • Circuit options: parallel ; tandem ; series
    • Carry over: hp carry over port optional
    • Spool control: manual ; pneumatic ; hydraulic ; electro-hydraulic ; remote cable

    POA

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    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice
  • Out of Stock
    Hydra Part 80L GS Sectional Control Valve - Approved Hydraulics
    Regular price From £225.28 Ex VAT From £270.34 Inc VAT
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    80L GS Sectional Control Valve

    Key Features

    • Type: sectional directional valve
    • Nominal flow: 80 lpm
    • Sections: 1 to 12
    • Integrated valves: main relief ; load check on each section
    • Circuit options: parallel ; tandem ; series
    • Carry over: hp carry over port optional
    • Spool control: manual ; pneumatic ; hydraulic ; electro-hydraulic ; remote cable
    Regular price From £225.28 Ex VAT From £270.34 Inc VAT
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Hydra Part 50L GS Sectional Control Valve - Approved Hydraulics
    Regular price From £203.61 Ex VAT From £244.34 Inc VAT
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    50L GS Sectional Control Valve

    Key Features

    • Type: sectional directional valve
    • Nominal flow: 50 lpm
    • Sections: 1 to 12
    • Integrated valves: main relief ; load check on each section
    • Circuit options: parallel ; tandem ; series
    • Carry over: hp carry over port optional
    • Spool control: manual ; pneumatic ; hydraulic ; electro-hydraulic ; remote cable
    Regular price From £203.61 Ex VAT From £244.34 Inc VAT
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Hydra Part CETOP 5 Pressure Reducing Module - P to T (ZPR-10-D-P-1-210-YM) - Approved Hydraulics
    Regular price £128.28 Ex VAT £153.94 Inc VAT
    • All Items Guaranteed
    • Delivery to UK & Ireland

    CETOP 5 Pressure Reducing Module - P to T (ZPR-10-D-P-1-210-YM)

    Key Features

    • Interface: iso 4401-05 cetop 5 ng10
    • Function: pressure reducing module p to t
    • Max operating pressure: 315 bar
    • Secondary pressure: 210 bar
    • Max flow: 60 lpm
    • Temperature: -20 c to +80 c
    Regular price £128.28 Ex VAT £153.94 Inc VAT
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Out of Stock
    Hydra Part Hydraulic 3 Port Flow Control Valve (Excess Back To Tank)  3/8" - Approved Hydraulics
    Regular price £69.83 Ex VAT £83.80 Inc VAT
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    Hydraulic 3 Port Flow Control Valve (Excess Back To Tank) 3/8"

    Key Features

    • Function: 3 way priority flow ; excess to tank
    • Port size: 3/8' bsp
    • Compensation: pressure compensated constant priority flow
    • Max pressure: up to 350 bar
    • Use: set actuator speed independent of load
    Regular price £69.83 Ex VAT £83.80 Inc VAT
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  • SAE10/2 Solenoid Valve Cartridge - Pilot Operated - 70 L/Min - 350bar - Checked in BOTH Directions - Approved Hydraulics Limited
    Regular price From £82.40 Ex VAT From £98.89 Inc VAT
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    SAE10/2 Solenoid Valve Cartridge - Pilot Operated - 70 L/Min - 350bar - Checked in BOTH Directions

    Key Features

    • Type: pilot operated solenoid poppet valve (SAE 10/2)
    • Flow rating: 70 L/min
    • Max pressure: 350 bar
    • Check function: checked in both directions
    • Operation: 2-way; 2-position poppet with manual override on some variants
    • Use: remote open/close of line flow under pressure
    Regular price From £82.40 Ex VAT From £98.89 Inc VAT
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  • SAE10/2 Solenoid Valve Cartridge - Pilot Operated - 70 L/Min - 350bar - Checked in BOTH Directions - Approved Hydraulics Limited
    Regular price From £53.50 Ex VAT From £64.20 Inc VAT
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    SAE10/2 Solenoid Valve Cartridge - Pilot Operated - 70 L/Min - 350bar - Checked in 1 Direction ONLY

    Key Features

    • Type: pilot operated solenoid poppet valve (SAE 10/2)
    • Flow rating: 70 L/min
    • Max pressure: 350 bar
    • Check function: checked in 1 direction
    • Operation: 2-way; 2-position poppet with manual override on some variants
    • Use: remote open/close of line flow under pressure
    Regular price From £53.50 Ex VAT From £64.20 Inc VAT
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  • DIN 3/8" BSPP Double Acting Pilot Check Valve With Adjustable Banjo 12mm - Approved Hydraulics Limited
    Regular price £31.95 Ex VAT £38.34 Inc VAT
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    DIN 3/8" BSPP Double Acting Pilot Check Valve With Adjustable Banjo 12mm

    Key Features

    • Type: double acting pilot operated check valve with adjustable banjo
    • Ports: 3/8 BSPP
    • Function: locks actuator in both directions until pilot pressure opens
    • Benefit: load holding with controlled release
    • Use: cylinders that must hold position under load
    Regular price £31.95 Ex VAT £38.34 Inc VAT
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  • Tamper proof cap M10 - RED color - Approved Hydraulics Limited
    Regular price £2.31 Ex VAT £2.78 Inc VAT
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    Tamper Proof Cap M20-M22 - RED Color

    Key Features

    • Type: tamper-proof cap for valve adjusters
    • Thread: M20 interface
    • Colour: red for quick identification
    • Function: prevents unauthorised adjustment and seals setting
    • Material: durable polymer or plated steel per variant
    Regular price £2.31 Ex VAT £2.78 Inc VAT
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  • 2 Port Manifold for SA10/2 Cartridge 3/8” BSPP Ports - 350 Bar
    Regular price £11.93 Ex VAT £14.32 Inc VAT
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    2 Port Manifold for SA10/2 Cartridge 3/8” BSPP Ports - 350 Bar

    Key Features

    • Type: 2-port manifold block for SAE 10/2 screw-in cartridges
    • Ports: as specified
    • Pressure rating: 350 bar
    • Cavity: SAE 10/2 twin cavity arrangement
    • Body: machined manifold with threaded BSPP ports
    • Use: line mounting of cartridge valves in compact circuits
    Regular price £11.93 Ex VAT £14.32 Inc VAT
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    • Order by 3pm for Next Day Delivery

Shop All Components for Professional Hydraulic Applications

Discover quality shop all 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. Browse related products including control valves, line mounted valves 1, hydraulic cylinders, hydraulic pumps to find the right solution for your hydraulic system. 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.