• Out of Stock
    Hydra Part Hydraulic Oil ISO 46, 20 Litres - Approved Hydraulics
    Regular price £86.32
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    Hydraulic Oil ISO 46, 20 Litres

    Key Features

    • Viscosity grade: iso vg 46
    • Type: anti wear hydraulic oil
    • Additives: anti oxidation ; anti foam ; anti rust
    • Applications: industrial and mobile hydraulic systems
    • Pack size: 20 litres
    Regular price £86.32
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  • Hydra Part CETOP 5 Modular Double Pilot Operated Check Valve on A & B (Z2DS-10) - Approved Hydraulics
    Regular price £86.32
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    CETOP 5 Modular Double Pilot Operated Check Valve on A & B (Z2DS-10)

    Key Features

    • Interface: iso 4401-05 cetop 5 ng10
    • Type: double pilot operated check valve
    • Ports: checks on a and b
    • Max operating pressure: 315 bar
    • Nominal flow: 80 l/min
    • Use: load holding on cylinders ; pilot release for motion
    Regular price £86.32
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  • Hydra Part CETOP 3 Modular Pressure Relief Valve - P to T - (ZPB-6-VP-1-315) - Approved Hydraulics
    Regular price £86.32
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    CETOP 3 Modular Pressure Relief Valve - P to T - (ZPB-6-VP-1-315)

    Key Features

    • Interface: iso 4401-03 cetop 3 ng06
    • Function: pilot operated pressure relief p to t
    • Max operating pressure: 315 bar
    • Max flow: 60 l/min
    • Temp range: -20 c to +70 c
    • Weight: 1.3 kg
    • Typical use: system overpressure protection on cetop 3 stacks
    Regular price £86.32
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  • Hydra Part 25cc Double acting manual hand pump - Approved Hydraulics
    Regular price £85.91
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    Double acting manual hand pump (25cc/12cc)

    Key Features

    • Displacement: 25 cc ; 12 cc options
    • Function: double acting hand pump for single acting cylinder
    • Rated pressure: 250 bar
    • Mounting: flanged fixing to oil tank
    • Options: release handknob ; pressure relief valve ; release lever
    • Construction: cast iron body ; manual lever operation
    Regular price £85.91
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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.

  • CETOP 5 Manifolds - P & T 3/4" - A & B 1/2" - Approved Hydraulics Limited
    Regular price From £85.37
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    CETOP 5 Manifolds - P & T 3/4" - A & B 1/2"

    Key Features

    • Type: cetop 5 ng10 manifold
    • Interface: iso 4401 05 pattern
    • Ports: p ; t 3/4" bsp ; a ; b 1/2" bsp
    • Mounting: 4 hole on industry mm pcd
    • Use: mount ng10 valves to pipework
    Regular price From £85.37
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  • Hydra Part SV80 Sequence Valve 1/2" Bsp - 80Lpm - 100-350 Bar - Approved Hydraulics
    Regular price £85.03
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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 £85.03
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  • Return Air Filter - 152mm - 25 µm - Approved Hydraulics Limited
    Regular price £84.68
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    Return Air Filter - 152mm - 25 µm

    Key Features

    • Type: tank top return ; air breather element
    • Length: 152 mm
    • Filtration: 25 µm nominal
    • Use: hydraulic reservoir breathing ; return filtration
    • Compatibility: frd ; similar housings
    Regular price £84.68
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  • Hydra Part Double Acting Cylinder 40mm Bore Rams - Approved Hydraulics
    Regular price From £84.35
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    Double Acting Hydraulic Cylinder 40mm Bore Rams

    Key Features

    • Bore: 40 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 £84.35
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  • Out of Stock
    Hydra Part Hydraulic 3 Port Flow Control Valve (Excess Back To Tank)  3/8" - Approved Hydraulics
    Regular price £83.80
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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 £83.80
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  • MINI Power Pack  5.8 cc/r  Grp 1 pump
    Regular price £82.79
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    MINI Power Pack 5.8 cc/r Grp 1 pump

    Key Features

    • Pump group: group 1 external gear pump
    • Displacement: 5.8 cc/rev
    • Rotation: ccw
    • Use: mini hydraulic power pack builds
    • Compatibility: b14 mounting kits ; group 1 couplings
    Regular price £82.79
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  • MINI Power Pack  4.8 cc/r  Grp 1 pump
    Regular price £82.79
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    MINI Power Pack 4.8 cc/r Grp 1 pump

    Key Features

    • Pump group: group 1 external gear pump
    • Displacement: 4.8 cc/rev
    • Rotation: ccw
    • Use: mini hydraulic power pack builds
    • Compatibility: b14 mounting kits ; group 1 couplings
    Regular price £82.79
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  • Out of Stock
    Dual Pilot Operated Check Valve 1/2"BSP In Line - 35Lpm - Approved Hydraulics Limited
    Regular price £82.68
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    Dual Pilot Operated Check Valve 1/2"BSP In Line - 35Lpm

    Key Features

    • Type: double pilot operated check valve inline
    • Port size: 1/2' bsp
    • Rated flow: 35 l/min
    • Typical max pressure: up to 350 bar
    • Function: locks actuator both directions ; opens with pilot pressure
    Regular price £82.68
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  • Hydraulic Oil ISO 32, 20 Litres - Approved Hydraulics Limited
    Regular price £82.54
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    Hydraulic Oil ISO 32, 20 Litres

    Key Features

    • Viscosity grade: iso vg 32
    • Type: mineral ; anti wear hm ; hlp
    • Standards: iso 11158 hm ; din 51524-2 hlp
    • Kinematic viscosity @40c: 32 mm^2/s nominal
    • Air release ; water separation: good
    • Use: industrial ; mobile hydraulic pumps ; motors ; valves
    • Packaging: 20 l drum
    Regular price £82.54
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  • 90L - 100L - 120L - 150L Control valve Rotary lever kit
    Regular price £81.84
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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
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  • Return Air Filter - 235mm - 25 µm
    Regular price £81.07
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    Return Air Filter - 235mm - 25 µm

    Key Features

    • Part number: FRD09
    • Filter type: Return line filter for hydraulic oil systems
    • Filtration rating: 25 µm mesh
    • Height: 235 mm
    • Connection: 1 in BSP
    • Max working pressure: 3 bar
    • Bypass valve: 1.7 bar ±10 percent
    • Materials: Head and cover aluminium; bowl polyamide
    Regular price £81.07
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  • Standard 45L Lever Operated Monoblock Valves (3/8"BSP) (1-6 levers) - Approved Hydraulics Limited
    Regular price From £80.74
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    Standard 45L Lever Operated Monoblock Valves (3/8"BSP) (1-6 levers)

    Key Features

    • Ports: 3/8\" bsp p ; a ; b ; t
    • Nominal flow: 45 lpm ; 65 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: single acting ; motor ; float spools ; detents
    Regular price From £80.74
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  • Hydra Part CETOP 3 Pressure Reducing Module - A to T (ZPR-6-D-A-1-30-210YM) - Approved Hydraulics
    Regular price £79.49
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    CETOP 3 Pressure Reducing Module - A to T (ZPR-6-D-A-1-30-210YM)

    Key Features

    • Interface: iso 4401-03 cetop 3 ng06
    • Type: 3 way direct operated pressure reducing
    • Reduced port: a to t
    • Primary pressure: max 315 bar
    • Secondary pressure: 210 bar
    • Max flow: 30 l/min
    • Use: branch pressure trimming on one work port
    Regular price £79.49
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  • Hydra Part CETOP 3 Pressure Reducing Module Valve - P to T (ZPR-6-D-P-1-210YM) - Approved Hydraulics
    Regular price £79.49
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    CETOP 3 Pressure Reducing Module Valve - P to T (ZPR-6-D-P-1-210YM)

    Key Features

    • Interface: iso 4401-03 cetop 3 ng06
    • Type: 3 way direct operated pressure reducing
    • Primary pressure: max 315 bar
    • Secondary pressure: 210 bar
    • Max flow: 30 l/min
    • Ports: reduction in p ; relief to t
    • Typical use: reduce downstream circuit pressure below main line
    Regular price £79.49
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  • MINI Power Pack  3.7 cc/r  Grp 1 pump - Approved Hydraulics Limited
    Regular price £79.16
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    MINI Power Pack 3.7 cc/r Grp 1 pump

    Key Features

    • Pump group: group 1 external gear pump
    • Displacement: 3.7 cc/rev
    • Rotation: ccw
    • Use: mini hydraulic power pack builds
    • Compatibility: b14 mounting kits ; group 1 couplings
    Regular price £79.16
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    • Order by 3pm for Next Day Delivery
  • Hydra Part 25cc Single acting manual hand pump - Approved Hydraulics
    Regular price £78.40
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    25cc Single Acting Manual Hand Pump

    Key Features

    • Displacement: 25 cc per stroke
    • Function: single acting manual hand pump
    • Rated pressure: 250 bar
    • Reservoir compatibility: 1 l ; 3 l ; 5 l steel tanks
    • Mounting: flanged fixing to oil tank
    • Typical applications: actuating single acting cylinders ; emergency circuits
    Regular price £78.40
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  • 100L Control Valve Right Inlet Section 3/4" Type ( Type BC) - Approved Hydraulics Limited
    Regular price £78.30
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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 £78.30
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  • Cylinder Seal Kit for Intermercato TG 12, 16, 19, 16 PRO, 16 EG - Approved Hydraulics Limited
    Regular price £78.17
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    Cylinder Seal kit 70-130/150 standard

    Key Features

    • Compatibility: Hydra Part standard double acting cylinders ; larger bores 70 ; 80 ; 90 ; 100 ; 110 ; 125 ; 130/150 mm
    • Intended use: service kit for major reseal of large bore standard cylinders
    • Typical kit contents: dynamic seals for piston and rod ; wiper ; and static seals typical for rebuild
    • Application range: heavy mobile plant ; materials handling ; forestry and similar equipment
    • Sizing note: check both bore and rod dimensions to match the correct sub option within the range
    • Service guidance: clean grooves and lightly lubricate seals during assembly to avoid damage
    Regular price £78.17
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  • Out of Stock
    PTO Gear Pump Flange Adaptors
    Regular price From £77.69
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    PTO Gear Pump Flange Adaptors

    Key Features

    • Function: Adaptor between PTO gearboxes and external gear pumps
    • Flange patterns: EU 4 bolt ; SAE A/B and brand specific options
    • Shaft interfaces: 1/8 taper ; 1/5 taper ; parallel ; splined options
    • Pump groups: Group 2 ; Group 3 compatibility
    • Use: Mount pump securely to PTO for mobile hydraulic kits
    Regular price From £77.69
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  • 160L-240L Control Valve 3 Position Detent Kit (11) - Approved Hydraulics Limited
    Regular price £77.65
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    160L-240L Control Valve 3 Position Detent Kit (11)

    Key Features

    • Type: 3 position detent kit . code 11
    • Compatibility: 160l ; 240l control valves
    • Function: locks spool in a ; neutral ; b positions
    • Use: sustained operation without holding the lever
    • Install: spring cap side positioner hardware
    Regular price £77.65
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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.