• CETOP 3 Coil  -24VDC Coil (23mm Bore x 50mm long) - Approved Hydraulics Limited
    Regular price £15.14
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    CETOP 3 Coil -24VDC Coil (23mm Bore x 50mm long)

    Key Features

    • Voltage: 24 vdc
    • Bore: 23 mm
    • Length: 50 mm
    • Connection: din 43650 a
    • Use: cetop 3 solenoid valves
    Regular price £15.14
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  • Out of Stock
    Scanreco Decal Set (45676) - Approved Hydraulics Limited
    Regular price £7.91
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    Scanreco Decal Set (45676)

    Key Features

    • Type: transmitter decal set
    • Compatibility: scanreco mini ; maxi panels
    • Material: uv resistant self adhesive overlays
    • Function: replace function legends and symbols
    • Use: refresh worn labels on remote transmitters
    Regular price £7.91
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  • CETOP 3 Coil  - 12VDC, (23mm Bore x 50mm long) - Approved Hydraulics Limited
    Regular price £13.79
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    CETOP 3 Coil - 12VDC, (23mm Bore x 50mm long)

    Key Features

    • Valve size: CETOP 3 ; NG6 ; ISO 4401-03
    • Voltage: 12 VDC
    • Core ; length: Ø 23 mm bore ; 50 mm long
    • Connector: DIN 43650 Form A or AMP Jr versions depending on brand
    • Protection: IP65 with suitable connector
    • Power class: typically ~20–29 W DC coils for NG6
    Regular price £13.79
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  • CETOP 3 Coil – 220VAC-50HZ  (23mm Bore x 50mm long) - Approved Hydraulics Limited
    Regular price £13.79
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    CETOP 3 Coil – 220VAC-50HZ (23mm Bore x 50mm long)

    Key Features

    • Valve size: CETOP 3 ; NG6 ; ISO 4401-03
    • Voltage: 220 VAC 50 Hz
    • Core ; length: Ø 23 mm bore ; 50 mm long
    • Connector: DIN 43650 Form A
    • Protection: IP65 with correct DIN plug
    • Notes: ensure AC coil ; armature pairing per manufacturer
    Regular price £13.79
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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.

  • GASKET ZF (0,5MM) - 4 BOLT - Approved Hydraulics Limited
    Regular price £1.43
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    GASKET ZF (0,5MM) - 4 BOLT

    Key Features

    • Type: ZF PTO / pump interface gasket
    • Thickness: 0.5 mm
    • Pattern: 4-bolt mounting
    • Function: seals gearbox-to-PTO or PTO-to-pump interface
    • Service note: replace whenever PTO/pump is removed
    • Benefit: prevents oil leakage and maintains system integrity
    Regular price £1.43
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  • 12VDC Coil For Z80 Valve 22mm Hole x 54mm Long - Approved Hydraulics Limited
    Regular price £34.88
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    12VDC Coil For Z80 Valve 22mm Hole x 54mm Long

    Key Features

    • Voltage: 12 vdc
    • Bore: 22 mm
    • Length: 54 mm
    • Use: z80 sectional valve coils
    • Connector: din plug
    Regular price £34.88
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  • Din Connector plug 3 Pole + Earth - IP65 - Max 240 VAC - 10A - Approved Hydraulics Limited
    Regular price £3.19
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    Din Connector plug 3 Pole + Earth - IP65 - Max 240 VAC - 10A

    Key Features

    • Standard: DIN 43650 Form A ; ISO 4400
    • Contacts: 3 pole + earth PE
    • Rating: 250 VAC ; 10 A max
    • Ingress protection: IP65 with gasket ; strain relief
    • Use: fits solenoid coils with 18 mm pin spacing ; DIN Form A
    Regular price £3.19
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  • 127mm 2 bolt level gauge with temp M12 - Approved Hydraulics Limited
    Regular price £31.36
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    127mm 2 bolt level gauge with temp M12

    Key Features

    • Part number: LVA20TAPM12S01
    • Gauge length: 127 mm
    • Mounting: 2 bolt level gauge for tank side mounting
    • Temperature port: M12 temperature sensor interface
    • Function: Visual oil level indication plus temperature monitoring
    • Typical use: Hydraulic reservoirs; gearboxes; power pack tanks
    Regular price £31.36
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  • 3/8 BSP male/ female extension (pair 62mm long) - Approved Hydraulics Limited
    Regular price £4.28
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    3/8 BSP male/ female extension (pair 62mm long)

    Key Features

    • Type: male ; female extension nipple
    • Thread: 3/8" bspp
    • Length: 62 mm
    • Use: stand off spacing for pipework
    • Application: hydraulic system component
    Regular price £4.28
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  • Standard DIN Hirschmann Connector Plug - Black - Approved Hydraulics Limited
    Regular price £4.34
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    Standard DIN Hirschmann Connector Plug - Black

    Key Features

    • Standard: EN 175301-803 DIN 43650
    • Pins: 3 pin; 2 pole and earth
    • Cable gland range: 4 mm to 9 mm cable diameter
    • Ingress protection: IP67 when correctly assembled
    • Current rating: 16 A max
    • Voltage rating: AC up to 250 V; DC up to 300 V
    • Typical use: Solenoid valve coils and industrial sensors
    Regular price £4.34
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  • 12vDC Coil For Z50 valve 16.3mm Hole x 50mm Long - Approved Hydraulics Limited
    Regular price £24.72
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    12vDC Coil For Z50 valve 16.3mm Hole x 50mm Long

    Key Features

    • Voltage: 12 vdc
    • Bore: 16.3 mm through-hole
    • Body length: 50 mm
    • Duty: 100% ed continuous
    • Connection: din plug style
    • Use: z50 solenoid valves
    Regular price £24.72
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  • Restrictor 0.7mm 3/8 - 3/8 Male / Male - Approved Hydraulics Limited
    Regular price £6.06
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    Restrictor 0.7mm 3/8 - 3/8 Male / Male

    Key Features

    • Type: inline flow restrictor fitting
    • Orifice: 0.7 mm calibrated orifice
    • Thread: 3/8" BSP male to 3/8" BSP male
    • Function: limits cylinder/rotator speed; reduces shock
    • Material: plated steel body for hydraulic service
    Regular price £6.06
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  • Out of Stock
    3/4" BSP Return Filter Housing
    Regular price £24.18
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    3/4" BSP Return Filter Housing

    Key Features

    • Port: 3/4" bspp return
    • Function: return filter head/housing
    • Use: tank top filtration assembly
    • Element: 25 µm compatible
    • Application: hydraulic system component
    Regular price £24.18
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  • Out of Stock
    Electrical plug for 12/24VDC coils EP3/4 kits - Approved Hydraulics Limited
    Regular price £1.49
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    Electrical plug for 12/24VDC coils EP3/4 kits

    Key Features

    • Connector: DIN 43650-A ; 3 pole + earth
    • Ingress protection: IP65 with gasket
    • Rating: up to 240 vac ; 10 a
    • Use: mates to EP3/EP4 solenoid coils 12 ; 24 vdc
    • Application: hydraulic component
    Regular price £1.49
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  • 24V DC Coil-22W-13mm hole-39mm long for  45 - 50L - 80L-90L-100L-150L Unloader Valve - Approved Hydraulics Limited
    Regular price £26.11
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    24V DC Coil-22W-13mm hole-39mm long for 45 - 50L - 80L-90L-100L-150L Unloader Valve

    Key Features

    • Voltage: 24 vdc
    • Power: 22 w
    • Bore: 13 mm through-hole
    • Body length: 39 mm
    • Duty: 100% ed
    • Use: unloader valve actuation
    Regular price £26.11
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  • Support for ABER ABCD Cab Control Units - Approved Hydraulics Limited
    Regular price £20.94
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    Support for ABER ABCD Cab Control Units

    Key Features

    • Component: support bracket for ABCD pattern
    • Material: steel fabrication
    • Finish: protective coating for corrosion resistance
    • Mounting: drilled interface per ABCD dimensions
    • Use: supports ancillary equipment or guards
    Regular price £20.94
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  • Out of Stock
    3/8" Hose Burst Valve Cartridge - Approved Hydraulics Limited
    Regular price £10.16
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    3/8" Hose Burst Valve Cartridge

    Key Features

    • Function: hose rupture protection check valve
    • Port size: 3/8" cavity
    • Use: locks flow on line failure
    • Install: screw in cartridge to cylinder port
    • Application: hydraulic system component
    Regular price £10.16
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    • Order by 3pm for Next Day Delivery
  • 24VDC Coil For Z80 Valve 22mm Hole x 54mm Long - Approved Hydraulics Limited
    Regular price £34.88
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    • Delivery to UK & Ireland

    24VDC Coil For Z80 Valve 22mm Hole x 54mm Long

    Key Features

    • Voltage: 24 vdc
    • Bore: 22 mm
    • Length: 54 mm
    • Use: z80 sectional valve coils
    • Connector: din plug
    Regular price £34.88
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Grease Nipple 1/8 BSP - Approved Hydraulics Limited
    Regular price £0.78
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    Grease Nipple 1/8 BSP

    Key Features

    • Thread: 1/8 bsp
    • Type: standard zerk lubrication fitting
    • Use: periodic greasing of moving joints
    • Application: hydraulic levers ; linkages ; hinges
    • Application: hydraulic component
    Regular price £0.78
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  • 3/8 Banjo Bolt c/w 2 x washers (50mm long ) - Approved Hydraulics Limited
    Regular price £5.29
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    3/8 Banjo Bolt c/w 2 x washers (50mm long )

    Key Features

    • Part number: HP-BJB-38
    • Bolt size: 3/8 in banjo bolt
    • Length: 50 mm
    • Sealing: Supplied with 2 sealing washers
    • Connection type: Hollow banjo bolt for banjo body fittings
    • Typical use: Hydraulic hose or tube banjo connections; compact 90 degree routing
    Regular price £5.29
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  • Stabiliser Leg Ram Cylinder Assembly 70 x 50 x 270 Stroke (incl Pilot  Operated Check Valve) - Approved Hydraulics Limited
    Regular price £282.06
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    Stabiliser Leg Ram Cylinder Assembly 70 x 50 x 270 Stroke (incl Pilot Operated Check Valve)

    Key Features

    • Bore: 70 mm
    • Rod: 50 mm
    • Stroke: 270 mm
    • Valve: pilot operated check valve integrated
    • Use: stabiliser leg actuation on cranes/trucks
    Regular price £282.06
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  • Atlas Crane Control Lever
    Regular price £62.46
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    Atlas Crane Control Lever

    Key Features

    • Component: OEM control lever assembly
    • Use: precise operation of Atlas loader crane functions
    • Construction: ergonomic handle with robust linkage
    • Fitment: part number 3201145 listing (series dependent)
    • Category: crane spares replacement part
    Regular price £62.46
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  • Maxma - MR Hydraulic Motor 200cc 25mm Parallel Key Shaft - Approved Hydraulics Limited
    Regular price £156.17
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    Maxma - MR Hydraulic Motor 200cc 25mm Parallel Key Shaft

    Key Features

    • Displacement: 200 cc/rev
    • Shaft: 25 mm parallel keyed
    • Type: hydraulic motor (orbital/gerotor style)
    • Rotation: bi-directional (typical)
    • Use: conveyors; augers; winches; general drives
    Regular price £156.17
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  • 24vDC Coil For HP-50 Monoblock Valve 24mm Dia Hole x 104mm Long - Approved Hydraulics Limited
    Regular price £124.93
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    24vDC Coil For HP-50 Monoblock Valve 24mm Dia Hole x 104mm Long

    Key Features

    • Valve family: HP50 solenoid sections
    • Voltage: 24 VDC
    • Core ; length: Ø 24 mm ; 60 mm long
    • Connector: DIN 43650 Form A
    • Insulation class: Class H typical for DC coils
    • Protection: IP65 with gasketed DIN plug
    Regular price £124.93
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Newly Added Products for Professional Hydraulic Applications

Discover quality newly added products 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.