• 3/4bsp M/F Extended Nipple
    Regular price £26.15
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery

    3/4bsp M/F Extended Nipple

    Key Features

    • Thread: 3/4" BSP male to 3/4" BSP female
    • Length: extended body for clearance
    • Material: plated steel hydraulic fitting
    • Use: offsets hoses away from rotating structures
    • Rating: typical 350–420 bar service class
    Regular price £26.15
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8 BANJO BOLT (35mm long) - Approved Hydraulics Limited
    Regular price £5.29
    • All Items Guaranteed
    • Delivery to UK & Ireland

    3/8 BANJO BOLT (35mm long)

    Key Features

    • Part number: BJBOLT-06
    • Bolt size: 3/8 in banjo bolt
    • Length: 35 mm
    • Connection type: Hollow banjo bolt for banjo body fittings
    • Typical use: Hydraulic banjo joints for compact hose or tube routing
    • Sealing method: Requires sealing washers either side of banjo body
    Regular price £5.29
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8 Banjo Bolt c/w 2 x washers (50mm long ) - Approved Hydraulics Limited
    Regular price £5.29
    • All Items Guaranteed
    • Delivery to UK & Ireland

    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
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8 Bonded seal - Approved Hydraulics Limited
    Regular price £0.92
    • All Items Guaranteed
    • Delivery to UK & Ireland

    3/8 Bonded seal

    Key Features

    • Type: bonded sealing washer
    • Size: per selection
    • Construction: elastomeric sealing element bonded to metal washer
    • Use: high pressure face sealing on parallel threads/ports
    • Benefit: reliable leak-tight joint under vibration
    Regular price £0.92
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 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.

  • 1/2 BSP Male - 9/16 UNF Male SORB without "O" Ring - Approved Hydraulics Limited
    Regular price £2.03
    • All Items Guaranteed
    • Delivery to UK & Ireland

    3/8 BSP Male - 9/16 UNF Male SORB without "O" Ring

    Key Features

    • Type: adaptor between SAE O-ring boss/UNF and BSP system
    • Threads: 3/8 to 9/16 thread
    • Seal: O-ring boss on SAE side; bonded washer or cone on BSP side
    • Note: some variants supplied without O-ring as stated
    • Use: interface US standard ports to BSP hoses/valves
    Regular price £2.03
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1/2" BSP Male x 1/2" BSP Female Swivel Adaptor - Approved Hydraulics Limited
    Regular price £5.58
    • All Items Guaranteed
    • Delivery to UK & Ireland

    3/8 BSP Male x 3/8 BSP Female Swivel Adaptor

    Key Features

    • Type: swivel adaptor
    • Threads: 3/8 to 3/8 thread
    • Swivel: captive nut allows orientation during tightening
    • Seal: flat face or cone seat per variant
    • Use: connect hoses where rotation is restricted
    Regular price £5.58
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8 BSP male/ female extension (pair 62mm long) - Approved Hydraulics Limited
    Regular price £4.28
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery

    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
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8 BSPP bi-directional flow control valve - Approved Hydraulics Limited
    Regular price £19.85
    • All Items Guaranteed
    • Delivery to UK & Ireland

    3/8 BSPP bi-directional flow control valve

    Key Features

    • Type: bi-directional flow control valve
    • Ports: 3/8 BSPP
    • Control: meters flow in both directions for consistent actuator speed
    • Adjustment: fine thread needle/knob for repeatable settings
    • Use: speed control of motors or cylinders under varying load
    Regular price £19.85
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8 BSPP CETOP 3 Single Manifold - 50 L/Min - 70/350 Bar - Aluminium Body - Approved Hydraulics Limited
    Regular price £47.32
    • All Items Guaranteed
    • Delivery to UK & Ireland

    3/8 BSPP CETOP 3 Single Manifold - 50 L/Min - 70/350 Bar - Aluminium Body

    Key Features

    • Type: single subplate manifold for CETOP 3 (NG6) valves
    • Ports: 3/8 BSPP
    • Max flow: 50 L/min
    • Pressure rating: 70–350 bar
    • Body: aluminium body
    • Use: mount a single directional valve with side ports
    Regular price £47.32
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8 BSPP Double Acting Counterbalance Valve For Open Centre 350 Bar - Bolt Fitting - Steel Body
    Regular price £102.23
    • All Items Guaranteed
    • Delivery to UK & Ireland

    3/8 BSPP Double Acting Counterbalance Valve For Open Centre 350 Bar - Bolt Fitting - Steel Body

    Key Features

    • Type: double acting counterbalance valve for open centre systems
    • Ports: 3/8 BSPP
    • Function: load holding; prevents overrunning loads
    • Modulation: opens with pilot pressure proportional to load
    • Benefit: stable lowering and shock protection
    • Body: steel; serviceable adjuster with lock
    Regular price £102.23
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8 BSPP Insert Check Valve Ball Type - Cracking Pressure 0.5 Bar
    Regular price £4.91
    • All Items Guaranteed
    • Delivery to UK & Ireland

    3/8 BSPP Insert Check Valve Ball Type - Cracking Pressure 0.5 Bar

    Key Features

    • Type: hydraulic component
    • Design: high reliability construction for mobile hydraulics
    • Use: suits the specified application
    • Material: steel body with corrosion protection
    Regular price £4.91
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8 BSPP Insert Check Valve Poppet Type - Cracking Pressure 0.5 Bar
    Regular price £18.00
    • All Items Guaranteed
    • Delivery to UK & Ireland

    3/8 BSPP Insert Check Valve Poppet Type - Cracking Pressure 0.5 Bar

    Key Features

    • Type: hydraulic component
    • Design: high reliability construction for mobile hydraulics
    • Use: suits the specified application
    • Material: steel body with corrosion protection
    Regular price £18.00
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8 BSPP Insert Reverse Check Valve Poppet Type - Cracking Pressure 0.5 Bar
    Regular price £25.60
    • All Items Guaranteed
    • Delivery to UK & Ireland

    3/8 BSPP Insert Reverse Check Valve Poppet Type - Cracking Pressure 0.5 Bar

    Key Features

    • Type: hydraulic component
    • Design: high reliability construction for mobile hydraulics
    • Use: suits the specified application
    • Material: steel body with corrosion protection
    Regular price £25.60
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8 BSPP Male Connection Poppet Check Valve -  Cracking Pressure 0.5 Bar - Approved Hydraulics Limited
    Regular price £8.18
    • All Items Guaranteed
    • Delivery to UK & Ireland

    3/8 BSPP Male Connection Poppet Check Valve - Cracking Pressure 0.5 Bar

    Key Features

    • Type: hydraulic component
    • Design: high reliability construction for mobile hydraulics
    • Use: suits the specified application
    • Material: steel body with corrosion protection
    Regular price £8.18
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8 BSPP Sequence Valve - 40 L/Min - 70/350 Bar - Steel Body
    Regular price From £49.74
    • All Items Guaranteed
    • Delivery to UK & Ireland

    3/8 BSPP Sequence Valve - 40 L/Min - 70/350 Bar - Steel Body

    Key Features

    • Type: line-mounted sequence valve for staged actuation
    • Ports: 3/8 BSPP
    • Flow rating: 40 L/min
    • Pressure range: 70–350 bar adjustable
    • Operation: direct acting; fully balanced poppet design
    • Body: steel body for durability
    • Use: start secondary function only after primary reaches set pressure
    Regular price From £49.74
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8 BSPT Blank Plug 09077
    Regular price £2.17
    • All Items Guaranteed
    • Delivery to UK & Ireland

    3/8 BSPT Blank Plug 09077

    Key Features

    • Type: straight adaptor (BSP adaptor)
    • Threads: 3/8 BSP
    • Standard: BSPP parallel per ISO 228 unless otherwise specified
    • Material: plated carbon steel for hydraulic service
    • Use: join hoses; valves; pipe runs or adapt port sizes
    Regular price £2.17
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Hydra Part 3/8" 3 port manual diverter valve (open centre) - Approved Hydraulics
    Regular price £33.12
    • All Items Guaranteed
    • Delivery to UK & Ireland

    3/8" 3 port manual diverter valve (open centre)

    Key Features

    • ["Port size: 3/8" bsp"
    • Configuration: 3 port ; open centre
    • Nominal flow: 35 lpm
    • Max pressure: 350 bar
    • "Function: manual rotary diverter for circuit selection"]
    Regular price £33.12
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Out of Stock
    Hydra Part 3/8" 3 Port Pressure Compensating Flow Control with bypass to line - Approved Hydraulics
    Regular price £161.21
    • All Items Guaranteed
    • Delivery to UK & Ireland

    3/8" 3 Port Pressure Compensating Flow Control with bypass to line

    Key Features

    • Port size: 3/8\" bsp
    • Type: 3 port priority flow control
    • Compensation: pressure compensated priority flow
    • Bypass: excess flow bypass to line
    • Use: maintains set actuator flow under load changes
    Regular price £161.21
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Out of Stock
    3/8" 3 Way Adjustable Priority Flow Control Valve  - Excess to Line. - Approved Hydraulics Limited
    Regular price £107.47
    • All Items Guaranteed
    • Delivery to UK & Ireland

    3/8" 3 Way Adjustable Priority Flow Control Valve - Excess to Line.

    Key Features

    • Ports: G 3/8 BSPP
    • Function: 3 way pressure compensated priority flow control
    • Max inlet flow: 60 l.min
    • Max outlet C flow: 35 l.min
    • Max pressure: 270 bar
    • Body: aluminium body ; hardened steel internals
    • Use: set constant actuator flow with excess to tank or secondary circuit
    Regular price £107.47
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1/2" BSP Coned Blanking Plug - Approved Hydraulics Limited
    Regular price £5.68
    • All Items Guaranteed
    • Delivery to UK & Ireland

    3/8" BSP Coned Blank Plug

    Key Features

    • Type: 60° coned seat blanking plug
    • Thread: 3/8 BSP
    • Seal: metal-to-metal on 60° cone
    • Material: plated steel for high pressure service
    • Use: safe isolation of unused ports
    Regular price £5.68
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8" BSP Female Blanking Plug - Approved Hydraulics Limited
    Regular price £8.75
    • All Items Guaranteed
    • Delivery to UK & Ireland

    3/8" BSP Female Blanking Plug

    Key Features

    • Type: port blanking component
    • Thread: 3/8 BSP
    • Seal: washer or O-ring depending on seat style
    • Material: plated carbon steel
    • Use: temporary or permanent closure of ports
    Regular price £8.75
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Out of Stock
    3/8" BSP Female To 1/2" BSP Male Fixed Adaptor - Approved Hydraulics Limited
    Regular price £6.40
    • All Items Guaranteed
    • Delivery to UK & Ireland

    3/8" BSP Female To 1/2" BSP Male Fixed Adaptor

    Key Features

    • Type: straight adaptor (BSP adaptor)
    • Threads: 3/8 to 1/2 BSP
    • Standard: BSPP parallel per ISO 228 unless otherwise specified
    • Material: plated carbon steel for hydraulic service
    • Use: join hoses; valves; pipe runs or adapt port sizes
    Regular price £6.40
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8" BSP Female x Female x Female Tee - Approved Hydraulics Limited
    Regular price £19.60
    • All Items Guaranteed
    • Delivery to UK & Ireland

    3/8" BSP Female x Female x Female Tee

    Key Features

    • Type: straight adaptor (BSP adaptor)
    • Threads: 3/8 BSP
    • Standard: BSPP parallel per ISO 228 unless otherwise specified
    • Material: plated carbon steel for hydraulic service
    • Use: join hoses; valves; pipe runs or adapt port sizes
    Regular price £19.60
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1/4" BSP Male for Bonded Seal x 1/4" BSP Female Swivel 90° Compact Elbow - Approved Hydraulics Limited
    Regular price £19.93
    • All Items Guaranteed
    • Delivery to UK & Ireland

    3/8" BSP Male for Bonded Seal x 1/4" BSP Female Swivel 90° Compact Elbow

    Key Features

    • Type: swivel adaptor female to female
    • Threads: 3/8 to 1/4 BSP
    • Swivel: captive nuts allow hose connection without twisting
    • Seal: flat-faced or washered seal depending on variant
    • Use: hose-to-hose connection where orientation matters
    Regular price £19.93
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery

All for Professional Hydraulic Applications

Discover quality all 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.