• 1/2" BSP Male x 1/2" BSP Female Swivel Adaptor - Approved Hydraulics Limited
    Regular price £9.71
    • All Items Guaranteed
    • Delivery to UK & Ireland

    5/8" BSP Male x 1/2" BSP Female Swivel Adaptor

    Key Features

    • Type: swivel adaptor female to female
    • Threads: 5/8 to 1/2 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 £9.71
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8" BSP Male for Bonded Seal x 3/8" BSP Female Swivel 90° Compact Elbow
    Regular price £30.83
    • All Items Guaranteed
    • Delivery to UK & Ireland

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

    Key Features

    • Type: 90° elbow adaptor (male to swivel female)
    • Threads: 3/8 to 3/8 BSP
    • Seal: male end designed for bonded washer sealing
    • Swivel: female side uses captive nut to avoid hose twist
    • Body: compact body for tight installation envelopes
    Regular price £30.83
    • 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
  • 1/4" BSP Male x 3/4" BSP Male Adaptor
    Regular price £10.67
    • All Items Guaranteed
    • Delivery to UK & Ireland

    1/4" BSP Male x 3/4" BSP Male Adaptor

    Key Features

    • Type: straight adaptor (BSP adaptor)
    • Threads: 1/4 to 3/4 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 £10.67
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 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.

  • 3/4" BSP x 3/4" BSP Bulkhead Adaptor with Locknut - Approved Hydraulics Limited
    Regular price £15.23
    • All Items Guaranteed
    • Delivery to UK & Ireland

    3/4" BSP x 3/4" BSP Bulkhead Adaptor with Locknut

    Key Features

    • Type: bulkhead adaptor with locknut for panel/tank pass-through
    • Threads: 3/4 to 3/4 BSP
    • Hardware: includes locknut for secure clamping
    • Material: plated carbon steel
    • Use: route hose/pipe through guards or reservoirs cleanly
    Regular price £15.23
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1" Bonded seal - Approved Hydraulics Limited
    Regular price £2.56
    • All Items Guaranteed
    • Delivery to UK & Ireland

    1" 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 £2.56
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8" BSP Male x 1/2" BSP Male Adaptor - Approved Hydraulics Limited
    Regular price £6.78
    • All Items Guaranteed
    • Delivery to UK & Ireland

    1/2" BSP Male x 3/4" BSP Male Adaptor

    Key Features

    • Type: straight adaptor (BSP adaptor)
    • Threads: 1/2 to 3/4 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 £6.78
    • 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 £11.92
    • All Items Guaranteed
    • Delivery to UK & Ireland

    1/2" BSP Male x 3/4" BSP Female Swivel Adaptor

    Key Features

    • Type: swivel adaptor (male to female)
    • Threads: 1/2 to 3/4 BSP
    • Swivel: captive nut allows hose connection without twisting
    • Seal: cone/washer seal depending on variant
    • Use: connect hoses where rotation during assembly is restricted
    Regular price £11.92
    • 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
  • 1/2 BSP  TEE F/F/M Branch
    Regular price £13.84
    • All Items Guaranteed
    • Delivery to UK & Ireland

    1/2 BSP TEE F/F/M Branch

    Key Features

    • Type: BSP tee adaptor with F/F/M branch configuration
    • Thread size: 1/2 BSP to ISO 228 (parallel for female ports)
    • Male thread: BSP parallel or taper per specific SKU and sealing method
    • Material: carbon steel with protective plating for hydraulic service
    • Rating: typical working pressure up to 315–420 bar depending on size
    • Use: splitting or combining hydraulic lines in compact layouts
    Regular price £13.84
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1/2 BSP Female Swivel x 1/2 BSP Female Swivel Adaptor
    Regular price £7.31
    • All Items Guaranteed
    • Delivery to UK & Ireland

    1/2 BSP Female Swivel x 1/2 BSP Female Swivel Adaptor

    Key Features

    • Type: swivel adaptor (male to male)
    • Threads: 1/2 to 1/2 BSP
    • Swivel: captive nut allows hose connection without twisting
    • Seal: cone/washer seal depending on variant
    • Use: connect hoses where rotation during assembly is restricted
    Regular price £7.31
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1/4" BSP Female Blanking Plug
    Regular price £4.67
    • All Items Guaranteed
    • Delivery to UK & Ireland

    1/4" BSP Female Blanking Plug

    Key Features

    • Type: blanking component for hydraulic lines
    • Thread: 1/4 BSP
    • Function: temporarily or permanently close a port
    • Material: plated steel
    • Use: service isolation; contamination control
    Regular price £4.67
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1/2" BSP Female Blanking Cap
    Regular price £5.48
    • All Items Guaranteed
    • Delivery to UK & Ireland

    1/2" BSP Female Blanking Cap

    Key Features

    • Type: blanking component for hydraulic lines
    • Thread: 1/2 BSP
    • Function: temporarily or permanently close a port
    • Material: plated steel
    • Use: service isolation; contamination control
    Regular price £5.48
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/4" BSP x 3/4" BSP Bulkhead Adaptor with Locknut - Approved Hydraulics Limited
    Regular price £9.71
    • All Items Guaranteed
    • Delivery to UK & Ireland

    1/4" BSP Male x 1/4" BSP Bulkhead Adaptor with Locknut

    Key Features

    • Type: bulkhead adaptor with locknut for panel/tank pass-through
    • Threads: 1/4 to 1/4 BSP
    • Hardware: includes locknut for secure clamping
    • Material: plated carbon steel
    • Use: route hose/pipe through guards or reservoirs cleanly
    Regular price £9.71
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8" BSP Male x 1/2" BSP Male Adaptor - Approved Hydraulics Limited
    Regular price £8.46
    • All Items Guaranteed
    • Delivery to UK & Ireland

    1/4" BSP Male x 5/8" BSP Male Adaptor

    Key Features

    • Type: straight adaptor (BSP adaptor)
    • Threads: 1/4 to 5/8 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 £8.46
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8" BSP Male x 1/2" BSP Male Adaptor - Approved Hydraulics Limited
    Regular price £11.87
    • All Items Guaranteed
    • Delivery to UK & Ireland

    3/4" BSP Male x 1" BSP Male Adaptor

    Key Features

    • Type: straight adaptor (BSP adaptor)
    • Threads: 3/4 to 1 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 £11.87
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8" BSP Female To 1/2" BSP Male Fixed Adaptor
    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
  • 3/4" BSP Male Cone Seal x 1" BSP Female Swivel Copact Adaptor
    Regular price £22.48
    • All Items Guaranteed
    • Delivery to UK & Ireland

    3/4" BSP Male Cone Seal x 1" BSP Female Swivel Copact Adaptor

    Key Features

    • Type: swivel adaptor (male to female)
    • Threads: 3/4 to 1 BSP
    • Swivel: captive nut allows hose connection without twisting
    • Seal: cone/washer seal depending on variant
    • Use: connect hoses where rotation during assembly is restricted
    Regular price £22.48
    • 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 £3.56
    • All Items Guaranteed
    • Delivery to UK & Ireland

    1/2" BSP Coned Blanking Plug

    Key Features

    • Type: 60° coned seat blanking plug
    • Thread: 1/2 BSP
    • Seal: metal-to-metal on 60° cone
    • Material: plated steel for high pressure service
    • Use: safe isolation of unused ports
    Regular price £3.56
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1/2" BSP Male x 1/2" BSP Female Swept 90° Elbow
    Regular price £9.18
    • All Items Guaranteed
    • Delivery to UK & Ireland

    1/2" BSP Male x 1/2" BSP Female Swept 90° Elbow

    Key Features

    • Type: 90° elbow adaptor (male to male)
    • Threads: 1/2 to 1/2 BSP
    • Body: swept radius for routing clearance
    • Construction: forged carbon steel; zinc plated
    • Use: change hose direction while maintaining service access
    Regular price £9.18
    • 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 £2.80
    • All Items Guaranteed
    • Delivery to UK & Ireland

    5/8" BSP Coned Blanking Plug

    Key Features

    • Type: 60° coned seat blanking plug
    • Thread: 5/8 BSP
    • Seal: metal-to-metal on 60° cone
    • Material: plated steel for high pressure service
    • Use: safe isolation of unused ports
    Regular price £2.80
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1/4" BSP Female Swivel x 3/8" BSP Female Swivel
    Regular price £5.34
    • All Items Guaranteed
    • Delivery to UK & Ireland

    1/4" BSP Female Swivel x 3/8" BSP Female Swivel

    Key Features

    • Type: swivel adaptor female to female
    • Threads: 1/4 to 3/8 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 £5.34
    • 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
  • 3/8" BSP Male x 1/2" BSP Male Adaptor - Approved Hydraulics Limited
    Regular price £8.08
    • All Items Guaranteed
    • Delivery to UK & Ireland

    1/8" BSP Male x 1/2" BSP Male Adaptor

    Key Features

    • Type: straight adaptor (BSP adaptor)
    • Threads: 1/8 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 £8.08
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery

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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.