• Spacer 20mm x 4mm tube 25mm long - Approved Hydraulics Limited
    Regular price £4.48
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    Spacer 20mm x 4mm tube 25mm long

    Key Features

    • Part number: FEM141001
    • Spacer form: Tube spacer for mechanical spacing
    • Tube size: 20 mm x 4 mm tube
    • Length: 25 mm
    • Function: Provides stand off distance and alignment in assemblies
    • Typical use: FEMAC attachment and flail component mounting
    Regular price £4.48
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  • 28 Bar Servo pressure reducer for IT128 blocks
    Regular price £149.64
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    28 Bar Servo pressure reducer for IT128 blocks

    Key Features

    • Type: servo pressure reducer for IT128 blocks
    • Set pressure: 28 bar class
    • Porting: internal pilot gallery with dedicated ports
    • Function: regulates pilot pressure to servo controlled valves
    • Use: stable proportional control in IT128 retrofit systems
    Regular price £149.64
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  • 80L TIE ROD KIT (4 Rods / kit) 3 Bank M8x1.25  216 mm long
    Regular price £16.85
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    80L TIE ROD KIT (4 Rods / kit) 3 Bank M8x1.25 216 mm long

    Key Features

    • Valve family: 80l sectional valve
    • Configuration: 3 bank
    • Rods per kit: 4
    • Thread: m8x1.25
    • Rod length: 216 mm
    • Application: clamp sectional valve stack ; maintain alignment under load
    • Compatibility: tie rod bores in 80l family
    • Variants: 1 ; 2 ; 3 ; 4 ; 5 ; 6 ; 7 ; 8 ; 9 ; 10 ; 11 ; 12 bank options
    Regular price £16.85
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  • 80L TIE ROD KIT (4 Rods / kit) 6 Bank  M8x1.25 339mm long
    Regular price £18.53
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    80L TIE ROD KIT (4 Rods / kit) 6 Bank M8x1.25 339mm long

    Key Features

    • Valve family: 80l sectional valve
    • Configuration: 6 bank
    • Rods per kit: 4
    • Thread: m8x1.25
    • Rod length: 339 mm
    • Application: clamp sectional valve stack ; maintain alignment under load
    • Compatibility: tie rod bores in 80l family
    • Variants: 1 ; 2 ; 3 ; 4 ; 5 ; 6 ; 7 ; 8 ; 9 ; 10 ; 11 ; 12 bank options
    Regular price £18.53
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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.

  • 80L TIE ROD KIT (4 Rods / kit) 8  Bank M8x1.25 421mm long
    Regular price £20.20
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    80L TIE ROD KIT (4 Rods / kit) 8 Bank M8x1.25 421mm long

    Key Features

    • Valve family: 80l sectional valve
    • Configuration: 8 bank
    • Rods per kit: 4
    • Thread: m8x1.25
    • Rod length: 421 mm
    • Application: clamp sectional valve stack ; maintain alignment under load
    • Compatibility: tie rod bores in 80l family
    • Variants: 1 ; 2 ; 3 ; 4 ; 5 ; 6 ; 7 ; 8 ; 9 ; 10 ; 11 ; 12 bank options
    Regular price £20.20
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  • 240L TIE ROD KIT (4 Rods / kit) 3 Bank M12x1.75  361 mm long
    Regular price £37.38
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    240L TIE ROD KIT (4 Rods / kit) 3 Bank M12x1.75 361 mm long

    Key Features

    • Valve family: 240l sectional valve
    • Configuration: 3 bank
    • Rods per kit: 4
    • Thread: m12x1.75
    • Rod length: 361 mm
    • Application: clamp sectional valve stack ; maintain alignment under load
    • Compatibility: tie rod bores in 240l family
    • Variants: 1 ; 2 ; 3 bank options
    Regular price £37.38
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  • Out of Stock
    80L Control Valve Tank Section (Type TC) (Old ref 30085660) - Approved Hydraulics Limited
    Regular price £57.85
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    100L GS Tank Section

    Key Features

    • Function: tank return section for GS sectional valve
    • Series: 100l family
    • Purpose: returns oil from valve stack to reservoir
    • Mounting: fits in sectional stack via tie rods
    • Typical use: end section to complete return path
    • Compatibility: 100l GS sectional components
    Regular price £57.85
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  • 100L TIE ROD KIT (4 Rods / kit) 9 Bank M10x1.5  508 mm long
    Regular price £30.72
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    100L TIE ROD KIT (4 Rods / kit) 9 Bank M10x1.5 508 mm long

    Key Features

    • Valve size: 100l
    • Banks: 9 bank
    • Rod thread: 10x1.5
    • Rod length: 508 mm
    • Set: 4 tie rods per kit
    • Use: assemble sectional valve stack
    Regular price £30.72
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  • 240L Control Valve 1 Bank Tie Rod Kit (4 Rods / kit)  M12x1.75 x  237mm long
    Regular price £30.56
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    240L Control Valve 1 Bank Tie Rod Kit (4 Rods / kit) M12x1.75 x 237mm long

    Key Features

    • Valve size: 240l
    • Banks: 1 bank
    • Rod thread: 12x1.75
    • Rod length: 237 mm
    • Set: 4 tie rods per kit
    • Use: assemble sectional valve stack
    Regular price £30.56
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    • Order by 3pm for Next Day Delivery
  • 80L TIE ROD KIT (4 Rods / kit) 12 Bank   M8x1.5  585 mm long
    Regular price £26.93
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    80L TIE ROD KIT (4 Rods / kit) 12 Bank M8x1.5 585 mm long

    Key Features

    • Valve size: 80l
    • Banks: 12 bank
    • Rod thread: 8x1.5
    • Rod length: 585 mm
    • Set: 4 tie rods per kit
    • Use: assemble sectional valve stack
    Regular price £26.93
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  • 240L TIE ROD KIT (4 Rods / kit) 2 Bank M12x1.75  299mm long
    Regular price £33.98
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    240L TIE ROD KIT (4 Rods / kit) 2 Bank M12x1.75 299mm long

    Key Features

    • Valve size: 240l
    • Banks: 2 bank
    • Rod thread: 12x1.75
    • Rod length: 299 mm
    • Set: 4 tie rods per kit
    • Use: assemble sectional valve stack
    Regular price £33.98
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    • Order by 3pm for Next Day Delivery
  • 90L Control Valve Spool Seal Kit (1 x Spool)
    Regular price £4.56
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    90L Control Valve Spool Seal Kit (1 x Spool)

    Key Features

    • Kit: spool seal kit
    • Valve size: 90 l/min
    • Contents: rod seals ; o rings ; backup rings
    • Use: service seal replacement for one spool
    • Application: hydraulic system component
    Regular price £4.56
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    • Order by 3pm for Next Day Delivery
  • Chains for TE120p Rev forestal
    Regular price £4.56
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    Chains for TE120p Rev forestal

    Key Features

    • Part number: 302010-CHAIN
    • Equipment compatibility: TE120p Rev forestal
    • Component type: Replacement chain set for forestry attachment
    • Function: Power transmission or guarding chain in moving mechanism
    • Duty: Designed for heavy duty; high shock forestry environments
    • Typical use: Forestry attachment servicing and wear part replacement
    Regular price £4.56
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    • Order by 3pm for Next Day Delivery
  • M+S Hydraulic Motor 80 CC/Rev, 4 bolt mount, 34.85 PTO DIN 9611 Agri Shaft - Approved Hydraulics Limited
    Regular price £492.19
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    M+S Hydraulic Motor 80 CC/Rev, 4 bolt mount, 34.85 PTO DIN 9611 Agri Shaft

    Key Features

    • Type: low speed high torque orbital motor MS or OMS series
    • Displacement: around 80 cc per rev
    • Shaft: 34.85 mm PTO DIN 9611 spline
    • Mount: 4 bolt square flange pattern
    • Ports: side ports typically G 1/2 with 1/4 drain
    • Use: winches ; augers ; conveyors
    Regular price £492.19
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    • Order by 3pm for Next Day Delivery
  • Baltrotors Bronze Bush - 45mm (Pair) - Approved Hydraulics Limited
    Regular price £33.53
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    Baltrotors Bronze Bush - 45mm (Pair)

    Key Features

    • Component: bronze bush pair for 45 mm pins
    • Material: oil-impregnated or tin bronze for low friction
    • Use: replacement for link heads and flanges
    • Benefit: good anti-seize properties; machinable
    • Service: grease compatible with bronze
    Regular price £33.53
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  • 50L TIE ROD KIT (3 Rods / kit) 8 Bank  M8x1.25 394mm long
    Regular price £16.92
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    50L TIE ROD KIT (3 Rods / kit) 8 Bank M8x1.25 394mm long

    Key Features

    • Valve family: 50l sectional valve
    • Configuration: 8 bank
    • Rods per kit: 3
    • Thread: m8x1.25
    • Rod length: 394 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 £16.92
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    • Order by 3pm for Next Day Delivery
  • 50L TIE ROD KIT (3 Rods / kit) 4 Bank  M8x1.25 242mm long
    Regular price £15.06
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    50L TIE ROD KIT (3 Rods / kit) 4 Bank M8x1.25 242mm long

    Key Features

    • Valve family: 50l sectional valve
    • Configuration: 4 bank
    • Rods per kit: 3
    • Thread: m8x1.25
    • Rod length: 242 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 £15.06
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    • Order by 3pm for Next Day Delivery
  • Out of Stock
    80L - 100L-150L - 240L Control Valve  Fixed Port Relief/Anti Cav. 200 bar Type RPHT U200 - Approved Hydraulics Limited
    Regular price £32.48
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    80L - 100L-150L - 240L - RPHT fixed port relief 150 bar

    Key Features

    • Part number: 300502150
    • Valve type: RPHT fixed port relief valve
    • Pressure setting: 150 bar
    • Compatibility: 80L; 100L; 150L; 240L valve families
    • Function: Limits maximum system pressure by relieving to tank
    • Typical use: Overpressure protection for pumps; hoses; and valve blocks
    Regular price £32.48
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    • Order by 3pm for Next Day Delivery
  • 50L TIE ROD KIT (3 Rods / kit) 7 Bank   M8x1.25 356 mm long
    Regular price £18.44
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    50L TIE ROD KIT (3 Rods / kit) 7 Bank M8x1.25 356 mm long

    Key Features

    • Valve family: 50l sectional valve
    • Configuration: 7 bank
    • Rods per kit: 3
    • Thread: m8x1.25
    • Rod length: 356 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 £18.44
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Microswitch (Normally closed) M14 x 1.5 thread
    Regular price £12.91
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    Microswitch (Normally closed) M14 x 1.5 thread

    Key Features

    • Part number: 20010687
    • Contact form: Normally closed
    • Mounting thread: M14 x 1.5
    • Function: Mechanical switch for position feedback in hydraulic controls
    • Typical use: Used in valve microswitch kits for spool position indication
    • Installation: Threaded body mounts into bracket or valve accessory kit
    Regular price £12.91
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  • 3 Position Detent Kits Type SC4 For AK50 Control Valve - Approved Hydraulics Limited
    Regular price £13.14
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    3 Position Detent Kits Type SC4 For AK50 Control Valve

    Key Features

    • Part number: 2000363000
    • Compatibility: AK50 control valve
    • Detent type: SC4 detent mechanism
    • Positions: 3 position detent
    • Function: Holds spool in selected position for continuous operation
    • Typical use: Directional control where lever must stay engaged
    Regular price £13.14
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  • 50L Control Valve High Pressure Carry Over Taper Blanking Plug 1/4" - Approved Hydraulics Limited
    Regular price £2.68
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    50L Control Valve High Pressure Carry Over Taper Blanking Plug 1/4"

    Key Features

    • Feature: high pressure carry over ; power beyond adapter
    • Compatibility: 50l monoblock valve
    • Port size: 1/4"
    • Use: feeds downstream valves while maintaining upstream relief
    • Install: replaces blanking plug in outlet cavity
    Regular price £2.68
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  • 80L - 100L- 150L - 240L  - RPHT fixed port relief 210 bar
    Regular price £32.48
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    80L - 100L- 150L - 240L - RPHT fixed port relief 210 bar

    Key Features

    • Part number: 300502210
    • Valve type: RPHT fixed port relief valve
    • Pressure setting: 210 bar
    • Compatibility: 80L; 100L; 150L; 240L valve families
    • Function: Limits maximum system pressure by relieving to tank
    • Typical use: Overpressure protection for pumps; hoses; and valve blocks
    Regular price £32.48
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 12V Elec/Air Solenoid  coil for 8EP3 -4 kit  3W IP65 100% ED - Coil 9mm hole x 30mm long
    Regular price £13.26
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    12V Elec/Air Solenoid coil for 8EP3 -4 kit 3W IP65 100% ED - Coil 9mm hole x 30mm long

    Key Features

    • Voltage: 12 vdc
    • Power: 3 w rating
    • Hole: 9 mm through-bore
    • Body length: 30 mm
    • Ingress protection: IP65
    • Duty: 100% ed
    • Use: electro-pneumatic 8EP3/8EP4 valves
    Regular price £13.26
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    • Order by 3pm for Next Day Delivery

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.