• Hydra Part CETOP 5 Modular Flow Control Valve on A&B (Z2FDS-10-30-S) - Approved Hydraulics
    Regular price £77.32
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    CETOP 5 Modular Flow Control Valve on A&B (Z2FDS-10-30-S)

    Key Features

    • Interface: iso 4401-05 cetop 5 ng10
    • Function: double throttle ; check meter-in or meter-out on a ; b
    • Max operating pressure: 315 bar
    • Max flow: 160 lpm
    • Temperature: -30 c to +80 c
    Regular price £77.32
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  • Hydra Part Single Counterbalance Valve 1/2" In Line - 100-350Bar - Approved Hydraulics
    Regular price £75.79
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    Single Counter Balance / Overcentre Valve 1/2" IN LINE Steel Body 100-350 Bar 4.2:1 Pilot Ratio

    Key Features

    • Type: single counterbalance ; overcentre valve
    • Port size: 1/2"
    • Adjustment range: 100 to 350 bar
    • Pilot ratio: 4.2 . 1
    • Body: steel body
    • Function: load holding ; controlled lowering ; relief overpressure
    • Mounting: in line
    • Typical applications: boom ; stabiliser legs ; winch loads
    Regular price £75.79
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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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  • MINI Power Pack  2.1 cc/r  Grp 1 pump - Approved Hydraulics Limited
    Regular price £75.28
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    MINI Power Pack 2.1 cc/r Grp 1 pump

    Key Features

    • Pump group: group 1 external gear pump
    • Displacement: 2.1 cc/rev
    • Rotation: ccw
    • Use: mini hydraulic power pack builds
    • Compatibility: b14 mounting kits ; group 1 couplings
    Regular price £75.28
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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 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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  • Double Pilot Operated Check Valve VBPDE 3/8"L  CMP/FLV - Approved Hydraulics Limited
    Regular price £73.46
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    Double Pilot Operated Check Valve VBPDE 3/8"L CMP/FLV

    Key Features

    • Ports: G 3/8 BSPP
    • Function: double pilot operated check valve VBPDE
    • Flow rating: 60–80 l.min typical
    • Max pressure: 350 bar
    • Use: load holding on cylinders ; prevents drift
    Regular price £73.46
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  • Hydra Part Double Acting Cylinder 32mm Bore Rams - Approved Hydraulics
    Regular price From £72.78
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    Double Acting Hydraulic Cylinder 32mm Bore Rams

    Key Features

    • Bore: 32 mm
    • Action: double acting
    • Mounting: pin eye both ends
    • Max pressure: 250 bar
    • Max speed: 0.5 m/s
    • Temperature: -25 c to +80 c
    • Stroke options: 50 to 1000 mm series range
    Regular price From £72.78
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  • 3/8" Dual Cross Line Relief Valve (V0440/180) 35 lpm - 100-180 Bar - With Protection Caps
    Regular price £72.67
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    3/8" Dual Cross Line Relief Valve (V0440/180) 35 lpm - 100-180 Bar - With Protection Caps

    Key Features

    • Thread size: G 3/8 BSPP
    • Setting range: 10 to 180 bar adjustable
    • Max flow: 35 l.min ; 45 l.min variants
    • Max pressure: 350 bar
    • Construction: zinc plated steel body ; hardened internal parts
    • Seals: NBR Buna N standard
    • Function: dual cross line relief with crossed tank
    • Typical use: motor or cylinder shock protection with independent port settings
    Regular price £72.67
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  • Hydra Part CETOP 3 Double Solenoid Control Valve NG06, P to T - A & B Blocked - Approved Hydraulics
    Regular price From £71.35
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    CETOP 3 Double Solenoid Control Valve NG06, P to T - A & B Blocked

    Key Features

    • Interface: iso 4401-03 cetop 3 ng06
    • Centre spool: p to t ; a and b blocked
    • Max flow: 60 lpm
    • Max pressure: p ; a ; b 315 bar ; t 160 bar
    • Coils: 12 vdc ; 24 vdc ; 110 vac 50hz ; 220 vac 50hz
    • Ingress protection: ip65
    • Manual override: standard on all valves
    • Connector: din plug with led
    • Switch time: 50 to 70 ms
    Regular price From £71.35
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    • Order by 3pm for Next Day Delivery
  • CETOP 3 Steel Manifold with Relief Cavity - P&T 1/2" - A&B 3/8" - Approved Hydraulics Limited
    Regular price From £70.92
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    CETOP 5 - Steel Manifold with Relief Cavity - P&T 3/4" - A&B 1/2"

    Key Features

    • Standard: cetop 5 ; iso 4401-05 ; ng10
    • Ports: p ; t 3/4" bspp ; a ; b 1/2" bspp
    • Relief cavity: main pressure relief cavity provided ; blanking plug when no cartridge
    • Max working pressure: 315 bar
    • Circuit: parallel
    • Stations: 1 ; 2 ; 3 ; 4 ; 5 ; 6 options
    • Material: steel
    • Use: mounting of ng10 directional valves ; high flow manifolds
    Regular price From £70.92
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  • 50L Control Valve MID Inlet section with relief (E12)
    Regular price £69.18
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    50L Control Valve MID Inlet section with relief (E12)

    Key Features

    • Section type: mid inlet (e12) with pressure relief
    • Compatibility: 50l gs sectional valve
    • Function: adds pump inlet mid stack and adjustable relief
    • Typical flow class: 50 l/min nominal
    • Relief range (typical): 0 ; 315 bar adjustable
    Regular price £69.18
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  • 45L FW Lever Operated Monoblock Valve (3/8"BSP) - Approved Hydraulics Limited
    Regular price £68.71
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    45L FW Lever Operated Monoblock Valve (3/8"BSP)

    Key Features

    • Type: 45l lever operated monoblock valve
    • Ports: 3/8" bsp
    • Spools: double acting sections
    • Relief: adjustable main relief
    • Use: mobile attachments ; tipper ; agricultural circuits
    Regular price £68.71
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  • Hydra Part Inline Pressure Relief Valve 3/4" Bsp 80Lpm 350 Bar Max - Approved Hydraulics
    Regular price From £68.51
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    Inline Pressure Relief Valves 3/4" BSP

    Key Features

    • Port size: 3/4\" bsp
    • Max flow: 80 lpm
    • Pressure range: 100 to 350 bar
    • Function: inline pressure relief ; system overpressure protection
    • Mounting: in line valve body
    Regular price From £68.51
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  • 150L - 240L Control Valve Pilot Relief Valve 60-315 Bar type XGN
    Regular price £67.62
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    150L - 240L Control Valve Pilot Relief Valve 60-315 Bar type XGN

    Key Features

    • Type: inlet pilot relief valve . xgn type
    • Set range: 60 ; 315 bar
    • Compatibility: 150l ; 240l valve families
    • Role: controls main relief setting for the assembly
    • Location: installed in inlet section relief cavity
    Regular price £67.62
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  • 150L-240L Control Valve Service Port Relief (Adjustable 0-315 Bar) - Approved Hydraulics Limited
    Regular price £67.62
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    150L-240L Control Valve Service Port Relief (Adjustable 0-315 Bar)

    Key Features

    • Type: adjustable service port relief valve
    • Set range: 0 ; 315 bar
    • Compatibility: 150l ; 240l valve families
    • Role: protects a or b work port from over pressure
    • Install: screws into working section relief cavity
    Regular price £67.62
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  • 80L Control Mechanical Joystick 2 x axis (LCB)
    Regular price £67.21
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    • Delivery to UK & Ireland

    80L Control Mechanical Joystick 2 x axis (LCB)

    Key Features

    • Series: 80L GS sectional control valve
    • Applications: mobile hydraulics ; loaders ; cranes
    • Compatibility: Hydra Part GS family ; alternative to Walvoil SD series in same size
    • Fluid: mineral oil ; 15–75 cSt operating range
    • Max pressure class: up to 315 bar per series
    Regular price £67.21
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    • Order by 3pm for Next Day Delivery
  • Hydra Part CETOP 3 Double Solenoid Control Valve NG06, All Ports Blocked - Approved Hydraulics
    Regular price From £67.01
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    • Delivery to UK & Ireland

    CETOP 3 Double Solenoid Control Valve NG06, All Ports Blocked

    Key Features

    • Centre spool: all ports blocked
    • Interface: iso 4401-03 cetop 3 ng06
    • Max flow: 60 lpm
    • Max pressure: p ; a ; b 315 bar ; t 160 bar
    • Coils: 12 vdc ; 24 vdc ; 110 vac 50hz ; 220 vac 50hz
    • Ingress protection: ip65
    • Connector: din plug with led
    • Manual override: standard on all valves
    Regular price From £67.01
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Out of Stock
    4 Port Manual Diverter Valve - 1/2" Open Centre
    Regular price £66.98
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    4 Port Manual Diverter Valve - 1/2" Open Centre

    Key Features

    • Type: 4 port 2 position manual diverter spool
    • Ports: 1/2" bsp
    • Centre: open centre
    • Use: select between two actuator circuits
    • Body: steel with plated handle
    Regular price £66.98
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  • Hydra Part CETOP 3 Double Solenoid Control Valve NG06, All Ports Open - Approved Hydraulics
    Regular price From £66.62
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    CETOP 3 Double Solenoid Control Valve NG06, All Ports Open

    Key Features

    • Centre spool: all ports open
    • Interface: iso 4401-03 cetop 3 ng06
    • Max flow: 60 lpm
    • Max pressure: p ; a ; b 315 bar ; t 160 bar
    • Coils: 12 vdc ; 24 vdc ; 110 vac 50hz ; 220 vac 50hz
    • Ingress protection: ip65
    • Connector: din plug with led
    • Manual override: standard on all valves
    Regular price From £66.62
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Hydra Part CETOP 3 Double Solenoid Control Valve NG06, A & B to T - P Blocked - Approved Hydraulics
    Regular price From £66.62
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    • Delivery to UK & Ireland

    CETOP 3 Double Solenoid Control Valve NG06, A & B to T - P Blocked

    Key Features

    • Interface: iso 4401-03 cetop 3 ng06
    • Centre spool: a and b to t ; p blocked
    • Max flow: 60 lpm
    • Max pressure: p ; a ; b 315 bar ; t 160 bar
    • Coils: 12 vdc ; 24 vdc ; 110 vac 50hz ; 220 vac 50hz
    • Ingress protection: ip65
    • Manual override: standard on all valves
    • Connector: din plug with led
    • Switch time: 50 to 70 ms
    Regular price From £66.62
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Hydra Part SV35 Sequence Valve 3/8"BSP - 35Lpm - 100-350 Bar - Approved Hydraulics
    Regular price £65.08
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    SV35 Sequence Valve 3/8"BSP - 35Lpm - 100-350 Bar

    Key Features

    • Port size: 3/8\" bsp
    • Max flow: 35 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 £65.08
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  • 45L Double microswitch kit (8MG1/MG2 NO-NO) (G-S)
    Regular price £64.25
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    45L Double microswitch kit (8MG1/MG2 NO-NO) (G-S)

    Key Features

    • Kit: double microswitch 8mg1 ; 8mg2 no-no
    • Valve size: 45 l platform
    • Use: electric signal when spool at end position
    • Mounting: g-s style bracket
    • Application: hydraulic system component
    Regular price £64.25
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    • Order by 3pm for Next Day Delivery
  • JS100 Cable Operated Joystick - Approved Hydraulics Limited
    Regular price £63.94
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    JS100 Cable Operated Joystick

    Key Features

    • Type: Cable operated remote control joystick
    • Model: JS100
    • Control: Single lever ; remote actuation of valve spools
    • Applications: Agricultural loaders ; cutters ; mixers
    • Mounting: Panel mount base with gaiter
    Regular price £63.94
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 80L-100L Control Valve Adjustable Service Port Relief + Anti Cav. 0-315 Bar - Approved Hydraulics Limited
    Regular price £63.25
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    • Delivery to UK & Ireland

    80L-100L Control Valve Adjustable Service Port Relief + Anti Cav. 0-315 Bar

    Key Features

    • Series: 80L GS sectional control valve
    • Pressure setting: 315 bar fixed
    • Function: port relief + anti-cavitation check
    • Typical use: protects service ports ; motor overrun protection
    • Installation: fits working section service port cavity
    Regular price £63.25
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Hydra Part for Professional Hydraulic Applications

Discover quality hydra part 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 lever operated monoblock valves, cetop 3 spares, scanreco spares accessories, scanreco 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.