• Out of Stock
    Weld collars 123mm (AC Motors) - Approved Hydraulics Limited
    Regular price £10.85
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    Weld collars 123mm (AC Motors)

    Key Features

    • Size: 123 mm
    • Function: weld on collar for tank neck
    • Use: mount 120 mm ; 123 mm filler necks to custom reservoirs
    • Material: steel
    • Applications: power pack tanks ; bespoke fabrications
    Regular price £10.85
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    • Order by 3pm for Next Day Delivery
  • Weld collars 120mm (DC Motors) - Approved Hydraulics Limited
    Regular price £10.85
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    Weld collars 120mm (DC Motors)

    Key Features

    • Size: 120 mm
    • Function: weld on collar for tank neck
    • Use: mount 120 mm ; 123 mm filler necks to custom reservoirs
    • Material: steel
    • Applications: power pack tanks ; bespoke fabrications
    Regular price £10.85
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    • Order by 3pm for Next Day Delivery
  • 50L TIE ROD KIT (3 Rods / kit) 1 Bank  M8x1.25  128mm long
    Regular price £10.32
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    50L TIE ROD KIT (3 Rods / kit) 1 Bank M8x1.25 128mm long

    Key Features

    • Valve family: 50l sectional valve
    • Configuration: 1 bank
    • Rods per kit: 3
    • Thread: m8x1.25
    • Rod length: 128 mm
    • Application: clamp sectional valve stack ; maintain alignment under load
    • Compatibility: tie rod bores in 50l family
    • Variants: 1 ; 2 ; 3 ; 4 ; 5 ; 6 ; 7 ; 8 bank options
    Regular price £10.32
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  • MR motorcover used on 32mm shaft conversion - Approved Hydraulics Limited
    Regular price £10.26
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    MR motorcover used on 32mm shaft conversion

    Key Features

    • Component: motor cover for MR motor 32 mm shaft conversion
    • Function: protects front seal area and bearing alignment
    • Use: fitted during conversion to 32 mm shaft
    • Benefit: clean finish and debris protection
    • Compatibility: MR series housings
    Regular price £10.26
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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
    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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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 24V Elec/Air Solenoid for 8EP3 -4 kit  4.8W IP65 100% ED - Coil 9mm Hole x 30mm long - Approved Hydraulics Limited
    Regular price £10.03
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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 £10.03
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    • Order by 3pm for Next Day Delivery
  • Euro Plug 2 Pin To Uk 3 Pin Plug Adapter
    Regular price £9.96
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    Euro Plug 2 Pin To Uk 3 Pin Plug Adapter

    Key Features

    • Input plug types: CEE 7/16 Europlug 2 pin ; CEE 7/7 Schuko E.F depending on model
    • Output socket: BS 1363 Type G 3 pin
    • Rating: 13 A 250 Vac
    • Fuse: 13 A BS 1362
    • Standard: BS 8546.2016+A1.2018 travel adaptor specification
    • Safety features: shuttered outlets ; insulated construction
    • Function: adapter only ; no voltage conversion
    • Typical use: power EU equipment from UK mains 230 Vac
    Regular price £9.96
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    • Order by 3pm for Next Day Delivery
  • Hydra Part 63mm Glycerine Hydraulic Pressure Gauge 0-9000 Psi (600 Bar) 1/4" Rear Entry - Approved Hydraulics
    Regular price £9.90
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    63mm Glycerine Hydraulic Pressure Gauge 0-9000 Psi (600 Bar) 1/4" Rear Entry

    Key Features

    • Dial: 63 mm
    • Filling: glycerine filled
    • Entry: 1/4\" bsp rear entry
    • Scale: psi ; bar dual scale
    • Casing: stainless steel
    • Pressure range: 0-9000 psi ( 600 bar )
    • Intended use: visual pressure readout on hydraulic circuits
    Regular price £9.90
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    • Order by 3pm for Next Day Delivery
  • Out of Stock
    Hydra Part 63mm Glycerine Hydraulic Pressure Gauge 0-2000 Psi (140 Bar) 1/4" Rear Entry - Approved Hydraulics
    Regular price £9.90
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    • Delivery to UK & Ireland

    63mm Glycerine Hydraulic Pressure Gauge 0-2000 Psi (140 Bar) 1/4" Rear Entry

    Key Features

    • Dial: 63 mm
    • Filling: glycerine filled
    • Entry: 1/4\" 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 £9.90
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Hydra Part 63mm Glycerine Hydraulic Pressure Gauge 0-6000 Psi (400 Bar) 1/4" Bottom Entry - Approved Hydraulics
    Regular price £9.90
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    • Delivery to UK & Ireland

    63mm Glycerine Hydraulic Pressure Gauge 0-6000 Psi (400 Bar) 1/4" Bottom Entry

    Key Features

    • Dial: 63 mm
    • Filling: glycerine filled
    • Entry: 1/4\" bsp bottom entry
    • Scale: psi ; bar dual scale
    • Casing: stainless steel
    • Pressure range: 0-6000 psi ( 400 bar )
    • Intended use: visual pressure readout on hydraulic circuits
    Regular price £9.90
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Hydra Part 63mm Glycerine Hydraulic Pressure Gauge 0-2000 Psi (140 Bar) 1/4" Bottom Entry - Approved Hydraulics
    Regular price £9.90
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    • Delivery to UK & Ireland

    63mm Glycerine Hydraulic Pressure Gauge 0-2000 Psi (140 Bar) 1/4" Bottom Entry

    Key Features

    • Dial diameter: 63 mm
    • Connection: 1/4' bsp bottom entry
    • Case: stainless steel aisi 304
    • Window: acrylic
    • Fill: glycerine 99.5 percent
    • Accuracy: class 1.6
    • Range: 0-2000 psi (140 bar) 1/4' bottom entry
    Regular price £9.90
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Hydra Part 63mm Glycerine Hydraulic Pressure Gauge 0-360 Psi (25 Bar) 1/4" Bottom Entry - Approved Hydraulics
    Regular price £9.90
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    • Delivery to UK & Ireland

    63mm Glycerine Hydraulic Pressure Gauge 0-360 Psi (25 Bar) 1/4" Bottom Entry

    Key Features

    • Dial diameter: 63 mm
    • Connection: 1/4' bsp bottom entry
    • Case: stainless steel aisi 304
    • Window: acrylic
    • Fill: glycerine 99.5 percent
    • Accuracy: class 1.6
    • Range: 0-360 psi (25 bar) 1/4' bottom entry
    Regular price £9.90
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1/2" Port, 90°, 4 Hole, 40mm PCD, Female Gear Pump Adaptors - Approved Hydraulics Limited
    Regular price £9.66
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    • Delivery to UK & Ireland

    1/2" Port, 90°, 4 Hole, 40mm PCD, Female Gear Pump Adaptors

    Key Features

    • Type: female gear pump adaptor
    • Orientation: 90°
    • Port: 1/2"
    • Mounting: 4 hole on 40 mm pcd
    • Use: connect pump outlet to hose or fittings
    Regular price £9.66
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Out of Stock
    Hydra Part Poppet Check Valve 1/4" 30Lpm, 400 Bar Max Pressure - Approved Hydraulics
    Regular price £9.43
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    • Delivery to UK & Ireland

    Poppet Check Valve 1/4" 30Lpm, 400 Bar Max Pressure

    Key Features

    • Type: inline poppet check valve
    • Port size: 1/4' bsp
    • Max flow: 30 l/min
    • Max pressure: 400 bar
    • Cracking pressure: 0.5 bar typical
    • Function: permits flow one way ; blocks reverse
    Regular price £9.43
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • M8 Clevis With 8mm Pin
    Regular price £9.23
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    • Delivery to UK & Ireland

    M8 Clevis With 8mm Pin

    Key Features

    • Thread: M8 female body
    • Pin: 8 mm supplied
    • Use: linkage end ; lever connection
    • Retain: split pin / circlip typical
    • Application: hydraulic component
    Regular price £9.23
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8" Port, 90°, 3 Hole, 30mm PCD, Female Gear Pump Adaptor
    Regular price £9.18
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    • Delivery to UK & Ireland

    3/8" Port, 90°, 3 Hole, 30mm PCD, Female Gear Pump Adaptor

    Key Features

    • Thread: 3/8" BSP
    • Angle: 90°
    Regular price £9.18
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1/4" Cylinder Breather - Approved Hydraulics Limited
    Regular price £9.08
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    • Delivery to UK & Ireland

    1/4" Cylinder Breather

    Key Features

    • Thread: 1/4" BSP
    • Function: vents cylinder/actuator to atmosphere
    • Element: porous filter to block dust ingress
    • Benefit: prevents vacuum build-up and moisture accumulation
    • Use: protects seals and internal surfaces during stroke
    Regular price £9.08
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • CARRY OVER PLUG For AK 50 Control Valve - Approved Hydraulics Limited
    Regular price £8.86
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    • Delivery to UK & Ireland

    CARRY OVER PLUG For AK 50 Control Valve

    Key Features

    • Function: power beyond sleeve ; isolates P from T in outlet section
    • Valve family: AK 50 sectional control valves
    • Porting: provides high pressure carry over to downstream valve
    • Installation: fit in outlet body ; tank line must remain to T1.T2
    • Use: extend circuits ; add additional valve stack safely
    Regular price £8.86
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/4" BSP Female Swivel Blanking Cap
    Regular price £8.84
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    • Delivery to UK & Ireland

    3/4" BSP Female Swivel Blanking Cap

    Key Features

    • Thread size: 3/4 in BSP female swivel
    • Function: Blanking cap to seal unused ports or hose ends
    • Connection style: Swivel nut style for easy installation and alignment
    • Sealing: Designed to seal against mating face with washer or bonded seal
    • Typical use: Hydraulic system maintenance; testing; and contamination prevention
    • Application: BSP threaded fittings and adaptors in fluid power systems
    Regular price £8.84
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8" Port, Straight, 30mm PCD, Female Gear Pump Adaptor
    Regular price £8.22
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    • Delivery to UK & Ireland

    3/8" Port, Straight, 30mm PCD, Female Gear Pump Adaptor

    Key Features

    • Thread: 3/8" BSP
    • Angle: Straight
    Regular price £8.22
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Check valve Cartridge - Approved Hydraulics Limited
    Regular price £7.92
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    • Delivery to UK & Ireland

    Check valve Cartridge

    Key Features

    • Type: screw in cartridge check valve
    • Cavity: sae 08 ; 3/4-16 unf
    • Function: permits flow 1 -> 2 ; blocks reverse
    • Cracking pressure: 0.3 bar class
    • Use: backflow prevention ; load holding in mini power packs
    Regular price £7.92
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Male to Female Pressure Gauge Adapters - Approved Hydraulics Limited
    Regular price From £7.16
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    • Delivery to UK & Ireland

    Male to Female Pressure Gauge Adapters

    Key Features

    • Type: male to female pressure gauge adaptor
    • Thread: bsp
    • Use: connect 1/4 ; 3/8 ; 1/2" gauge threads to system ports
    • Material: plated steel or brass per size
    • Sizes: common sizes stocked ; see options
    Regular price From £7.16
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1/2" Port, 90°, 3 Hole, 30mm PCD, Female Gear Pump Adaptors - Approved Hydraulics Limited
    Regular price £6.88
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    • Delivery to UK & Ireland

    1/2" Port, 90°, 3 Hole, 30mm PCD, Female Gear Pump Adaptors

    Key Features

    • Type: female gear pump adaptor
    • Orientation: 90°
    • Port: 1/2"
    • Mounting: 3 hole on 30 mm pcd
    • Use: connect pump outlet to hose or fittings
    Regular price £6.88
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8 BANJO BOLT (35mm long) - Approved Hydraulics Limited
    Regular price £6.73
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    1/2 BANJO BOLT

    Key Features

    • Part number: BJBOLT-08
    • Bolt size: 1/2 in banjo bolt
    • Connection type: Hollow banjo bolt for banjo body fittings
    • Flow path: Cross drilled bolt shank for fluid transfer through banjo
    • Typical use: Hydraulic hose or tube banjo connections in compact spaces
    • Sealing method: Requires sealing washers either side of banjo body
    Regular price £6.73
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery

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.