• Shim for valve sections  50/80 Ltr
    Regular price £1.90
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    Shim for valve sections 50/80 Ltr

    Key Features

    • Part number: 20032365
    • Compatibility: Valve sections 50L; 80L flow families
    • Component type: Shim for sectional valve assembly
    • Function: Adjusts clearances and improves section sealing alignment
    • Maintenance use: Replacement part during valve rebuild or section service
    • Performance impact: Helps smooth spool operation and sealing performance
    Regular price £1.90
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Shim for valve sections  100/150 Ltr
    Regular price £1.90
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    Shim for valve sections 100/150 Ltr

    Key Features

    • Part number: 20032366
    • Compatibility: Valve sections 100L; 150L flow families
    • Component type: Shim for sectional valve assembly
    • Function: Adjusts clearances and improves section sealing alignment
    • Maintenance use: Replacement part during valve rebuild or section service
    • Performance impact: Helps smooth spool operation and sealing performance
    Regular price £1.90
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • flat Washer M16 - Approved Hydraulics Limited
    Regular price £0.42
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    flat Washer M16

    Key Features

    • Part number: FEMUNI6592
    • Fastener size: M16
    • Washer type: Flat washer for load distribution
    • Function: Spreads clamp load and protects mating surfaces
    • Typical use: FEMAC flail and attachment assembly hardware
    • Installation: Used under bolt head or nut with M16 threaded fasteners
    Regular price £0.42
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    • Order by 3pm for Next Day Delivery
  • 1/2" Cylinder Breather
    Regular price £17.82
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    1/2" Cylinder Breather

    Key Features

    • Thread: 1/2" NPT
    • Function: vents cylinder while filtering intake air
    • Benefit: balances pressure; reduces moisture and dust ingress
    • Element: integrated breather element (high-flow)
    • Use: hydraulic cylinders; small reservoirs
    Regular price £17.82
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    • 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.

  • T1 KF1 Blades - Sold Individually
    Regular price £8.89
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    T1 KF1 Blades - Sold Individually

    Key Features

    • Compatibility: t1 head
    • Type: kf1 cutting blade
    • Sale: sold individually
    • Use: grass ; hedging
    • Application: hydraulic attachment component
    Regular price £8.89
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Key 14x9x70 2R - Approved Hydraulics Limited
    Regular price £3.42
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    Key 14x9x70 2R

    Key Features

    • Profile: parallel key 14 x 9 x 70 mm
    • Ends: double radius (2R) for easier insertion
    • Function: positive torque transmission between shaft and hub
    • Use: keying cone splitter drive components
    • Material: alloy steel key stock
    Regular price £3.42
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • TE100REV/T9 Drive Belt - Approved Hydraulics Limited
    Regular price £31.26
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    TE100REV/T9 Drive Belt

    Key Features

    • Compatibility: te100rev ; t9 heads
    • Type: drive belt
    • Notes: replace as set ; tension per manual
    • Use: power transmission from motor to rotor
    • Application: hydraulic attachment component
    Regular price £31.26
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    • Order by 3pm for Next Day Delivery
  • Blade flail for TE80 and 100 LT - Approved Hydraulics Limited
    Regular price £7.20
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    Blade flail for TE80 and 100 LT

    Key Features

    • Compatibility: te80 ; te100 lt heads
    • Type: replacement knife blade
    • Material: hardened steel
    • Use: grass ; hedge trimming
    • Application: hydraulic attachment component
    Regular price £7.20
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Femac T9 FS Hammer Pin - Approved Hydraulics Limited
    Regular price £49.60
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    • Delivery to UK & Ireland

    Femac T9 FS Hammer Pin

    Key Features

    • Use: hammer pin for fs rotor
    • Compatibility: t9 fs rotor hammers
    • Construction: hardened steel
    • Note: replace with matching bushes
    • Application: hydraulic attachment component
    Regular price £49.60
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    • Order by 3pm for Next Day Delivery
  • Femac T11&T13 FS Securing pin Nut To Suit HF19 Kit - Approved Hydraulics Limited
    Regular price £18.22
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    • Delivery to UK & Ireland

    Femac T11&T13 FS Securing pin Nut To Suit HF19 Kit

    Key Features

    • Use: nut for hf19 securing pin
    • Compatibility: t11 fs ; t13 fs rotors
    • Type: self locking ; high tensile
    • Note: pair with hf19 pin as kit
    • Application: hydraulic attachment component
    Regular price £18.22
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    • Order by 3pm for Next Day Delivery
  • 1200mm Rotor Bar for T13 FR130 - Approved Hydraulics Limited
    Regular price £82.08
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    1200mm Rotor Bar for T13 FR130

    Key Features

    • Length: 1200 mm
    • Compatibility: t13 fr130 rotor
    • Role: hammer carrier bar
    • Material: high strength steel
    • Balance: install in matched pairs
    Regular price £82.08
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  • T1 hammer bracket (Pair)
    Regular price £28.86
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    T1 hammer bracket (Pair)

    Key Features

    • Compatibility: t1 flail head
    • Kit: pair
    • Function: retains hammer to rotor lug
    • Material: steel ; heat treated
    • Use: grass ; light scrub applications
    Regular price £28.86
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    • Order by 3pm for Next Day Delivery
  • Femac T11 FS & T13FS HF19 Pin - Approved Hydraulics Limited
    Regular price £52.86
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    • Delivery to UK & Ireland

    Femac T11 FS & T13FS HF19 Pin

    Key Features

    • Use: securing pin for hf19 hammer
    • Compatibility: t11 fs ; t13 fs rotors
    • Construction: hardened steel
    • Notes: pair with matching nut ; bush
    • Application: hydraulic attachment component
    Regular price £52.86
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Flail motor 34cc - Approved Hydraulics Limited
    Regular price £840.06
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    • Delivery to UK & Ireland

    Flail motor 34cc

    Key Features

    • Displacement: 34 cc/rev
    • Type: external gear motor
    • Group: group 2 mounting
    • Ports: bsp threads
    • Use: femac flail heads drive
    Regular price £840.06
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Flow control cartridge
    Regular price £341.60
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    Flow control cartridge

    Key Features

    • Type: adjustable needle flow control
    • Cavity: sae 08 ; 3/4-16 unf
    • Function: meter in ; meter out flow tuning
    • Pressure rating: up to 315 ; 350 bar class
    • Use: mini power pack manifolds ; mobile equipment
    Regular price £341.60
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  • Flail motor 16cc
    Regular price £739.80
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    Flail motor 16cc

    Key Features

    • Displacement: ≈16 cc/rev
    • Series: group 2 gear motor class
    • Use: small flail heads t3/t5
    • Mounting: european group 2 4-bolt; bsp ports
    • Ports: bsp thread ports typical
    Regular price £739.80
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    • Order by 3pm for Next Day Delivery
  • Flail motor 34cc - Approved Hydraulics Limited
    Regular price £1,131.82
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    Flail motor 43cc

    Key Features

    • Displacement: ≈43 cc/rev
    • Series: group 2 gear motor class
    • Use: mid-heavy flail heads t7/t9
    • Mounting: european group 2 4-bolt; bsp ports
    • Ports: bsp thread ports typical
    Regular price £1,131.82
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    • Order by 3pm for Next Day Delivery
  • Flail motor 8cc PLM20.8.2R0-82E2-LEA/E
    Regular price £432.06
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    Flail motor 8cc PLM20.8.2R0-82E2-LEA/E

    Key Features

    • Displacement: 8.2 cc/rev
    • Series: plm20 group 2 gear motor
    • Rotation: right-hand
    • Use: t1/t3 flail heads; light duty
    • Mounting/ports: european group 2 pattern; bsp ports
    Regular price £432.06
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Gear joint
    Regular price £29.32
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    • Delivery to UK & Ireland

    Gear joint

    Key Features

    • Function: couples flail rotor to drive motor
    • Style: gear-type flexible coupling
    • Alignment: tolerates small misalignment ; dampens shock
    • Sizing: select by torque ; bore ; keyway
    • Service: spare element for flail head driveline
    Regular price £29.32
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Variseal For Femac T7/T9/T13 22-27-34-43-51cc Motors - Approved Hydraulics Limited
    Regular price £66.06
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    Variseal For Femac T7/T9/T13 22-27-34-43-51cc Motors

    Key Features

    • Seal type: ptfe variseal for high-speed gear motors
    • Motor displacements: 22 ; 27 ; 34 ; 43 ; 51 cc
    • Typical shaft: 22-25 mm id depending on motor series
    • Use: dust ; grit resistant low-friction sealing
    • Note: match seal profile to motor make/model
    Regular price £66.06
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Variseal back up washer 18x30
    Regular price £54.76
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    Variseal back up washer 18x30

    Key Features

    • Size: 18 x 30 mm
    • Role: back-up ring to support variseal
    • Material: ptfe or polyamide depending on kit
    • Use: prevents extrusion at pressure
    • Compatibility: pairs with 18 mm shaft variseal elements
    Regular price £54.76
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1/4" Cylinder Breather
    Regular price £9.08
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    • Delivery to UK & Ireland

    1/4" Cylinder Breather

    Key Features

    • Thread: 1/4" BSP
    • Function: vents cylinder/actuator to atmosphere
    • Element: porous filter to block dust ingress
    • Benefit: prevents vacuum build-up and moisture accumulation
    • Use: protects seals and internal surfaces during stroke
    Regular price £9.08
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Single Acting Spool On 'A' Port for AK50 Control Valve - Approved Hydraulics Limited
    Regular price £15.19
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    Single Acting Spool On 'A' Port for AK50 Control Valve

    Key Features

    • Spool type: single acting on A port with check on B
    • Neutral: spring centered ; blocked work port in neutral
    • Function: metered raise on A ; gravity return via check
    • Application: SA cylinders ; tipper ; clamps
    • Specification: see product datasheet
    Regular price £15.19
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    • Order by 3pm for Next Day Delivery
  • D/A spool for 50L AK electric op valve - Approved Hydraulics Limited
    Regular price £16.45
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    • Delivery to UK & Ireland

    D/A spool for 50L AK electric op valve

    Key Features

    • Spool type: double acting cylinder spool for AK 50 valve
    • Neutral: spring centered ; P to T open centre ; A.B blocked options by build
    • Work ports: metered control A ; B in both directions
    • Use: operate DA cylinders ; lift ; tilt functions
    • Notes: confirm spool code against valve plate for symbol matching
    Regular price £16.45
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    • Delivery to UK & Ireland
    • 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.