• 3/8" BSP Male x 1/2" BSP Male Adaptor - Approved Hydraulics Limited
    Regular price £35.34
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    1 1/" BSP Male - 1 1/2" BSP Male Adaptor

    Key Features

    • Type: inline adaptor male to male
    • Threads: 1 1/4 BSP to 1 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 extend fittings
    Regular price £35.34
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    • Order by 3pm for Next Day Delivery
  • 3/8" BSP Male x 1/2" BSP Male Adaptor - Approved Hydraulics Limited
    Regular price £38.65
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    1 1/2 BSPm x 1 1/2 BSPm

    Key Features

    • Type: inline adaptor male to male
    • Threads: 1 1/2 BSP to 1 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 extend fittings
    Regular price £38.65
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    • 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 £25.12
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    1 1/2" BSP Male - 2" BSP Male Adaptor

    Key Features

    • Type: straight thread adaptor
    • Threads: 1 1/2 to 2 thread
    • Standard: BSPP parallel unless specified otherwise
    • Material: plated carbon steel
    • Use: join hoses; valves; or adapt port sizes
    Regular price £25.12
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  • 1 1/2" Male/Female Low Pressure Ball Valve
    Regular price £143.77
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    1 1/2" Male/Female Low Pressure Ball Valve

    Key Features

    • Type: low pressure ball valve
    • Ports: 1/2" bsp
    • Pressure: suitable for return or suction lines
    • Use: isolate low pressure circuits
    • Body: nickel plated brass or steel
    • Seal: ptfe seats
    Regular price £143.77
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  • 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
    1/2" BSP Male x 1/2" BSP Female Swivel Adaptor - Approved Hydraulics Limited
    Regular price £25.84
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    1 1/4" BSP Male x 1 1/2" BSP Female Swivel Adaptor

    Key Features

    • Type: swivel adaptor female to female
    • Threads: 1 1/4 to 1 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 £25.84
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    • Order by 3pm for Next Day Delivery
  • 1/2" BSP Male x 1/2" BSPT Tapered Adaptor - Approved Hydraulics Limited
    Regular price £14.17
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    1 1/4" BSPP X 1 1/4" BSPT Tapered ADAPTOR

    Key Features

    • Type: adaptor converting parallel to tapered port standards
    • Threads: 1 1/4 to 1 1/4 thread
    • Standards: BSPP parallel and BSPT taper as applicable
    • Sealing: taper threads with sealant; parallel with washer/bonded seal
    • Use: connect BSPP components to BSPT ports or vice versa
    Regular price £14.17
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Out of Stock
    Hydra Part 1" 3 port manual diverter valve (open centre) - Approved Hydraulics
    Regular price £116.57
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    1" 3 port manual diverter valve (open centre)

    Key Features

    • Port size: 1\" bsp
    • Configuration: 3 way ; 2 position open centre
    • Function: manual rotary diverter for circuit selection
    • Mounting: in line installation
    • Typical applications: circuit selection for attachments ; auxiliary functions
    Regular price £116.57
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  • Hydra Part 1/2" 3 Port Pressure Compensating Flow Control with bypass to line - Approved Hydraulics
    Regular price £347.56
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    1" 3 Port Pressure Compensating Flow Control with bypass to line

    Key Features

    • Max Inlet Flow: 200 Lpm
    • Max Adjusted Flow: 170 Lpm
    • Max Pressure: 350 Bar
    • Function: Pressure compensated flow control; regulates actuator speed
    • Notes: Specification information is limited in source listing; confirm dimensions and compatibility before purchase
    Regular price £347.56
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  • 1" Bonded seal - Approved Hydraulics Limited
    Regular price £2.56
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    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
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  • 1/2" BSP Coned Blanking Plug - Approved Hydraulics Limited
    Regular price £12.54
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    1" BSP Coned Blanking Plug

    Key Features

    • Thread: 1" BSPP male with 60 degree cone sealing form
    • Standard: coned plug geometry per ISO 8434 ; 6
    • Material: steel ; zinc plated in common variants
    • Working pressure: typical rating around 210 bar for 1 inch size in steel adaptors
    • Use case: blank and pressure test BSPP female ports on hydraulic manifolds or hoses
    • Seal concept: cone seats directly to matching female cone for metal to metal seal
    Regular price £12.54
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  • 1" BSP Female Blanking Cap
    Regular price £11.29
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    1" BSP Female Blanking Cap

    Key Features

    • Type: port blanking component
    • Thread: 1 BSP
    • Seal: washer or O-ring depending on seat style
    • Material: plated carbon steel
    • Use: temporary or permanent closure of ports
    Regular price £11.29
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    • Order by 3pm for Next Day Delivery
  • 3/8" BSP Male x 1/2" BSP Male Adaptor - Approved Hydraulics Limited
    Regular price £11.20
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    • Delivery to UK & Ireland

    1" BSP Male x 1" BSP Male Adaptor

    Key Features

    • Type: straight thread adaptor
    • Threads: 1 to 1 thread
    • Standard: BSPP parallel unless specified otherwise
    • Material: plated carbon steel
    • Use: join hoses; valves; or adapt port sizes
    Regular price £11.20
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1" BSP Male x 1" BSPT Male Tapered Adaptor
    Regular price £5.48
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    • Delivery to UK & Ireland

    1" BSP Male x 1" BSPT Male Tapered Adaptor

    Key Features

    • Type: adaptor converting parallel to tapered port standards
    • Threads: 1 to 1 thread
    • Standards: BSPP parallel and BSPT taper as applicable
    • Sealing: taper threads with sealant; parallel with washer/bonded seal
    • Use: connect BSPP components to BSPT ports or vice versa
    Regular price £5.48
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1" BSP Spy Eye Level Gauge (Black)
    Regular price £9.11
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    1" BSP Spy Eye Level Gauge (Black)

    Key Features

    • Type: Threaded sight level gauge for hydraulic tanks
    • Thread: 1" BSP
    • Seal: Supplied with rubber sealing washer
    • Head: Hex head with shoulder for seating
    • Colour: Black
    • Use: Visual oil level indication at reservoir wall
    Regular price £9.11
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    • Order by 3pm for Next Day Delivery
  • 1" BSP Spy Eye Level Gauge (Clear)
    Regular price £11.65
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    1" BSP Spy Eye Level Gauge (Clear)

    Key Features

    • Type: Threaded sight level gauge for hydraulic tanks
    • Thread: 1" BSP
    • Seal: Supplied with rubber sealing washer
    • Head: Hex head with shoulder for seating
    • Colour: Clear
    • Use: Visual oil level indication at reservoir wall
    Regular price £11.65
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    • 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 £33.66
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    1" BSP x 1" BSP Bulkhead with Locknut

    Key Features

    • Type: bulkhead adaptor for pass-through mounting
    • Threads: 1 to 1 thread
    • Hardware: supplied with locknut or ring as applicable
    • Material: plated carbon steel
    • Use: secure hose or pipe through panels or tanks
    Regular price £33.66
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    • Order by 3pm for Next Day Delivery
  • 3/8 BSPP bi-directional flow control valve - Approved Hydraulics Limited
    Regular price £52.50
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    • Delivery to UK & Ireland

    1" BSPP Bi-directional Flow Control Valve

    Key Features

    • Type: bi-directional flow control valve
    • Ports: 1 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 £52.50
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1" BSPT Tapered x 1" BSPT Tapered Adaptor
    Regular price £8.41
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    • Delivery to UK & Ireland

    1" BSPT Tapered x 1" BSPT Tapered Adaptor

    Key Features

    • Type: adaptor converting parallel to tapered port standards
    • Threads: 1 to 1 thread
    • Standards: BSPP parallel and BSPT taper as applicable
    • Sealing: taper threads with sealant; parallel with washer/bonded seal
    • Use: connect BSPP components to BSPT ports or vice versa
    Regular price £8.41
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1" Male Female Tipper Quick Release  Coupling (Set) - Approved Hydraulics Limited
    Regular price £117.18
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    • Delivery to UK & Ireland

    1" Male Female Tipper Quick Release Coupling (Set)

    Key Features

    • Size: 1"
    • Type: screw type quick release set
    • Ends: male ; female pair
    • Use: tipper circuit disconnect
    • Application: single acting tipping gear
    Regular price £117.18
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    • Order by 3pm for Next Day Delivery
  • 1" Port, 90°, 3 Hole, 51mm PCD, Female Gear Pump Adaptors
    Regular price £19.04
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    • Delivery to UK & Ireland

    1" Port, 90°, 3 Hole, 51mm PCD, Female Gear Pump Adaptors

    Key Features

    • Type: female gear pump adaptor
    • Orientation: 90°
    • Port: per selection
    • Mounting: 3 hole on 51 mm pcd
    • Use: connect pump outlet to hose or fittings
    Regular price £19.04
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    • Order by 3pm for Next Day Delivery
  • 1" Male Female Tipper Quick Release  Coupling (Set) - Approved Hydraulics Limited
    Regular price £59.82
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    • Delivery to UK & Ireland

    1" Quick Release Coupling (Screw Type, Female)

    Key Features

    • Type: screw to connect quick release coupling female
    • Port size: 1"
    • Benefit: high resistance to pressure spikes
    • Use: high pressure attachments ; hammer circuits
    • Standard: screw to connect design
    • Pressure: high impulse rated per series
    Regular price £59.82
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    • Order by 3pm for Next Day Delivery
  • 1" Male Female Tipper Quick Release  Coupling (Set) - Approved Hydraulics Limited
    Regular price £62.22
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    • Delivery to UK & Ireland

    1" Quick Release Coupling (Screw Type, Male)

    Key Features

    • Type: screw to connect quick release coupling male
    • Port size: 1"
    • Benefit: connects under residual pressure
    • Use: high pressure attachments and tools
    • Standard: screw to connect design
    • Pressure: high impulse rated per series
    Regular price £62.22
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    • Order by 3pm for Next Day Delivery
  • 1" Straight Keyed Shaft For MP And MR Motors (ZHE)
    Regular price £28.18
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    • Delivery to UK & Ireland

    1" Straight Keyed Shaft For MP And MR Motors (ZHE)

    Key Features

    • Shaft diameter: 1.000 in
    • Key standard: ANSI B17.1 parallel key
    • Key size: 1/4 in x 1/4 in typical for 1 in shaft
    • Compatibility: M+S MP ; MR orbital motor shaft interface
    • Use: replacement straight keyed shaft
    • Notes: verify keyway and seal kit against motor series and code
    Regular price £28.18
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    • Order by 3pm for Next Day Delivery
  • 1" Straight Keyed Shaft For MR Motors (Zi)
    Regular price £38.16
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    1" Straight Keyed Shaft For MR Motors (Zi)

    Key Features

    • Interface: 1" straight keyed shaft
    • Compatibility: MR series hydraulic motors (Zi)
    • Keyway: parallel key for positive torque transfer
    • Retention: snap ring/retainer provision (motor dependent)
    • Material: alloy steel for wear resistance
    • Use: adapts motor to couplings; hubs; pulleys
    Regular price £38.16
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    • Order by 3pm for Next Day Delivery

All

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.