• 100L TIE ROD KIT (4 Rods / kit) 12 Bank M10x1.5 643mm long
    Regular price £34.73
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    100L TIE ROD KIT (4 Rods / kit) 12 Bank M10x1.5 643mm long

    Key Features

    • Valve size: 100l
    • Banks: 12 bank
    • Rod thread: 10x1.5
    • Rod length: 643 mm
    • Set: 4 tie rods per kit
    • Use: assemble sectional valve stack
    Regular price £34.73
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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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  • 45L Double microswitch kit (8MG1/MG2 NO-NO) (G-S)
    Regular price £64.25
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    45L Double microswitch kit (8MG1/MG2 NO-NO) (G-S)

    Key Features

    • Kit: double microswitch 8mg1 ; 8mg2 no-no
    • Valve size: 45 l platform
    • Use: electric signal when spool at end position
    • Mounting: g-s style bracket
    • Application: hydraulic system component
    Regular price £64.25
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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.

  • 150L Control Vlalve Pressure Compensated Flow Divider Section DFG
    Regular price £572.78
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    150L Control Vlalve Pressure Compensated Flow Divider Section DFG

    Key Features

    • Section: pressure compensated flow divider
    • Valve size: 150 l/min platform
    • Function: split flow evenly across sections
    • Use: multi function control valve stacks
    • Application: hydraulic system component
    Regular price £572.78
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  • On Sale
    1/2" 4 Bank 45L Monoblock Control Valve
    Regular price £106.80
    Regular price £124.76 Sale price Saving 14%
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    1/2" 4 Bank 45L Monoblock Control Valve

    Key Features

    • Valve type: monoblock control valve
    • Flow rating: 45 l/min
    • Banks: 4
    • Ports: 1/2" bspp work ports
    • Operation: lever
    • Use: compact hydraulic circuits
    Regular price £106.80
    Regular price £124.76 Sale price Saving 14%
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  • 160LGM Motor Spool
    Regular price £41.84
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    160LGM Motor Spool

    Key Features

    • Spool type: motor spool
    • Valve size: 160 l/min
    • Function: open centre with relief ; anti-cavitation checks typical
    • Use: hydraulic motors ; winch ; conveyor
    • Application: hydraulic system component
    Regular price £41.84
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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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    • Order by 3pm for Next Day Delivery
  • 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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    • Delivery to UK & Ireland
    • 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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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 150L TIE ROD KIT (4 Rods / kit) 6 Bank M10x1.5 417mm long
    Regular price £27.83
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    150L TIE ROD KIT (4 Rods / kit) 6 Bank M10x1.5 417mm long

    Key Features

    • Valve size: 150l
    • Banks: 6 bank
    • Rod thread: 10x1.5
    • Rod length: 417 mm
    • Set: 4 tie rods per kit
    • Use: assemble sectional valve stack
    Regular price £27.83
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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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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • M+S Hydraulic Motor 80 CC/Rev, 4 bolt mount, 34.85 PTO DIN 9611 Agri Shaft
    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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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8" Hose Burst Valve Cartridge - Approved Hydraulics Limited
    Regular price £9.24
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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 £9.24
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    • Order by 3pm for Next Day Delivery
  • 24VDC Coil For Z50 valve 16.3mm Hole x 50mm Long
    Regular price £24.68
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    24VDC Coil For Z50 valve 16.3mm Hole x 50mm Long

    Key Features

    • Voltage: 24 vdc
    • Bore: 16.3 mm
    • Length: 50 mm
    • Use: z50 sectional valve coil
    • Connector: din plug
    Regular price £24.68
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    • Order by 3pm for Next Day Delivery
  • 3/4" BSP x 3/4" BSP Bulkhead Adaptor with Locknut - Approved Hydraulics Limited
    Regular price £23.15
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    1/2" BSP Male x 1/2" BSP Bulkhead Adaptor with Locknut

    Key Features

    • Type: bulkhead adaptor with locknut for panel/tank pass-through
    • Threads: 1/2 to 1/2 BSP
    • Hardware: includes locknut for secure clamping
    • Material: plated carbon steel
    • Use: route hose/pipe through guards or reservoirs cleanly
    Regular price £23.15
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    • Order by 3pm for Next Day Delivery
  • 12VDC Coil For Z80 Valve 22mm Hole x 54mm Long - Approved Hydraulics Limited
    Regular price £34.88
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    12VDC Coil For Z80 Valve 22mm Hole x 54mm Long

    Key Features

    • Voltage: 12 vdc
    • Bore: 22 mm
    • Length: 54 mm
    • Use: z80 sectional valve coils
    • Connector: din plug
    Regular price £34.88
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    • Order by 3pm for Next Day Delivery
  • 24VDC Coil For Z80 Valve 22mm Hole x 54mm Long
    Regular price £34.88
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    24VDC Coil For Z80 Valve 22mm Hole x 54mm Long

    Key Features

    • Voltage: 24 vdc
    • Bore: 22 mm
    • Length: 54 mm
    • Use: z80 sectional valve coils
    • Connector: din plug
    Regular price £34.88
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • CETOP 3 Coil  -24VDC Coil (23mm Bore x 50mm long) - Approved Hydraulics Limited
    Regular price £14.41
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    CETOP 3 Coil -24VDC Coil (23mm Bore x 50mm long)

    Key Features

    • Voltage: 24 vdc
    • Bore: 23 mm
    • Length: 50 mm
    • Connection: din 43650 a
    • Use: cetop 3 solenoid valves
    Regular price £14.41
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    • Order by 3pm for Next Day Delivery
  • 30mm x 30mm DU Bush
    Regular price £2.90
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    30mm x 30mm DU Bush

    Key Features

    • Type: DU composite self-lubricating plain bush
    • Size: 30 mm bore x 30 mm length
    • Construction: steel back with sintered bronze + PTFE layer
    • Benefit: dry-running; low friction; good wear resistance
    • Use: pivot points and linkages on attachments
    Regular price £2.90
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    • Order by 3pm for Next Day Delivery
  • 80L Control Valve Inlet Section -S
    Regular price £82.02
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    80L Control Valve Inlet Section -S

    Key Features

    • Valve size: 80 l/min
    • Section: inlet section -s
    • Features: integral relief ; power beyond port
    • Use: start of sectional valve stack
    • Application: hydraulic system component
    Regular price £82.02
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    • Order by 3pm for Next Day Delivery
  • Rotary shaft seal - Approved Hydraulics Limited
    Regular price £14.24
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    • Delivery to UK & Ireland

    Rotary shaft seal

    Key Features

    • Type: rotary shaft oil seal
    • Profile: R23 style (double lip with dust lip)
    • Material: oil-resistant elastomer with garter spring
    • Use: seals cone splitter spindle against oil leakage
    • Service: replace when leakage or lip wear is observed
    Regular price £14.24
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 12VDC Proportional Coil For MOD09 Scanreco Servo Module 19mm Dia Hole x 50mm Long - Approved Hydraulics Limited
    Regular price £64.38
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    12VDC Proportional Coil For MOD09 Scanreco Servo Module 19mm Dia Hole x 50mm Long

    Key Features

    • Type: proportional coil for mod09 servo module
    • Voltage: 12 vdc
    • Core: 19 mm bore x 50 mm length
    • Connector: din 43650 form a style
    • Use: energize mod09 actuator section
    Regular price £64.38
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    • Order by 3pm for Next Day Delivery
  • Adapter Kit for 45L Hydra Part Proportional Module - Approved Hydraulics Limited
    Regular price £103.68
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    Adapter Kit for 45L Hydra Part Proportional Module

    Key Features

    • Type: adapter kit for 45l hydra part proportional module
    • Compatibility: hydra part 45l and walvoil sd5 valve families
    • Contents: hydraulic adaptors ; fittings and washers
    • Function: plumbing kit for retrofit servo module pilot and return
    • Use: convert manual valve to proportional remote control
    Regular price £103.68
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    • 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.