• 80L Control Valve Standard Spring Cap Kit - Approved Hydraulics Limited
    Regular price £19.67
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    80L Control Valve Standard Spring Cap Kit

    Key Features

    • Series: 80L GS sectional control valve
    • Function: spring return to centre
    • Positioners: fits standard manual lever boxes
    • Typical use: automatic centring of manual spools
    • Compatibility: Hydra Part GS family ; alternative to Walvoil SD series in same size
    Regular price £19.67
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    • Order by 3pm for Next Day Delivery
  • 80L Control Valve Tank Section (Type TC) (Old ref 30085660) - Approved Hydraulics Limited
    Regular price £53.81
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    80L Control Valve Tank Section (Type TC) (Old ref 30085660)

    Key Features

    • Section type: tank/outlet section (tc)
    • Compatibility: 80l gs sectional control valve
    • Function: provides main return to tank port for the valve stack
    • Old reference: 30085660
    • Typical circuits: open centre with optional carry over porting
    Regular price £53.81
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    • Order by 3pm for Next Day Delivery
  • 80L Control Valve Type H Spool (Dead Man Lever) For 80W010047 Body Section - Approved Hydraulics Limited
    Regular price £40.88
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    80L Control Valve Type H Spool (Dead Man Lever) For 80W010047 Body Section

    Key Features

    • Series: 80L GS sectional control valve
    • Spool type: type H ; dead-man lever return
    • Safety feature: spring return to neutral when released
    • Use case: safety critical actuation ; hold-to-run
    • Compatibility: Hydra Part GS family ; alternative to Walvoil SD series in same size
    Regular price £40.88
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Out of Stock
    Hydra Part 80L GS Sectional Control Valve - Approved Hydraulics
    Regular price From £270.34
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    • Delivery to UK & Ireland

    80L GS Sectional Control Valve

    Key Features

    • Type: sectional directional valve
    • Nominal flow: 80 lpm
    • Sections: 1 to 12
    • Integrated valves: main relief ; load check on each section
    • Circuit options: parallel ; tandem ; series
    • Carry over: hp carry over port optional
    • Spool control: manual ; pneumatic ; hydraulic ; electro-hydraulic ; remote cable
    Regular price From £270.34
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    • 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.

  • 80L lever box with stroke limiter
    Regular price £16.13
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    80L lever box with stroke limiter

    Key Features

    • Feature: mechanical stroke limiter
    • Compatibility: 80 l control valve
    • Use: limit spool travel ; tune flow
    • Application: hydraulic component
    • Application: hydraulic component
    Regular price £16.13
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    • Order by 3pm for Next Day Delivery
  • 80L TIE ROD KIT (4 Rods / kit) 1 Bank   M8x1.25 134mm long
    Regular price £15.19
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    80L TIE ROD KIT (4 Rods / kit) 1 Bank M8x1.25 134mm long

    Key Features

    • Valve family: 80l sectional valve
    • Configuration: 1 bank
    • Rods per kit: 4
    • Thread: m8x1.25
    • Rod length: 134 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 £15.19
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    • Order by 3pm for Next Day Delivery
  • 80L TIE ROD KIT (4 Rods / kit) 10 Bank M8x1.25 508mm long
    Regular price £23.57
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    • Delivery to UK & Ireland

    80L TIE ROD KIT (4 Rods / kit) 10 Bank M8x1.25 508mm long

    Key Features

    • Valve family: 80l sectional valve
    • Configuration: 10 bank
    • Rods per kit: 4
    • Thread: m8x1.25
    • Rod length: 508 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 £23.57
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 80L TIE ROD KIT (4 Rods / kit) 11 Bank M8x1.25 546 mm long
    Regular price £26.93
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    • Delivery to UK & Ireland

    80L TIE ROD KIT (4 Rods / kit) 11 Bank M8x1.25 546 mm long

    Key Features

    • Valve family: 80l sectional valve
    • Configuration: 11 bank
    • Rods per kit: 4
    • Thread: m8x1.25
    • Rod length: 546 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 £26.93
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    • Delivery to UK & Ireland
    • 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
  • 80L TIE ROD KIT (4 Rods / kit) 2 bank M8x1.25 175 mm long
    Regular price £15.19
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    • Delivery to UK & Ireland

    80L TIE ROD KIT (4 Rods / kit) 2 bank M8x1.25 175 mm long

    Key Features

    • Valve family: 80l sectional valve
    • Configuration: 2 bank
    • Rods per kit: 4
    • Thread: m8x1.25
    • Rod length: 175 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 £15.19
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 80L TIE ROD KIT (4 Rods / kit) 3 Bank M8x1.25  216 mm long
    Regular price £16.85
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    • Delivery to UK & Ireland

    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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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 80L TIE ROD KIT (4 Rods / kit) 4 Bank M8x1.25 257 mm long
    Regular price £16.85
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    • Delivery to UK & Ireland

    80L TIE ROD KIT (4 Rods / kit) 4 Bank M8x1.25 257 mm long

    Key Features

    • Valve family: 80l sectional valve
    • Configuration: 4 bank
    • Rods per kit: 4
    • Thread: m8x1.25
    • Rod length: 257 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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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 80L TIE ROD KIT (4 Rods / kit) 5 Bank M8x1.25 298mm long
    Regular price £18.53
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    • Delivery to UK & Ireland

    80L TIE ROD KIT (4 Rods / kit) 5 Bank M8x1.25 298mm long

    Key Features

    • Valve family: 80l sectional valve
    • Configuration: 5 bank
    • Rods per kit: 4
    • Thread: m8x1.25
    • Rod length: 298 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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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 80L TIE ROD KIT (4 Rods / kit) 6 Bank  M8x1.25 339mm long
    Regular price £18.53
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    • Delivery to UK & Ireland

    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
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 80L TIE ROD KIT (4 Rods / kit) 7 Bank M8x1.25 380mm long
    Regular price £20.20
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    • Delivery to UK & Ireland

    80L TIE ROD KIT (4 Rods / kit) 7 Bank M8x1.25 380mm long

    Key Features

    • Valve family: 80l sectional valve
    • Configuration: 7 bank
    • Rods per kit: 4
    • Thread: m8x1.25
    • Rod length: 380 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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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 80L TIE ROD KIT (4 Rods / kit) 8  Bank M8x1.25 421mm long
    Regular price £20.20
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    • Delivery to UK & Ireland

    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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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Out of Stock
    80L TIE ROD KIT (4 Rods / kit) 9 Bank M8x1.25 469mm long
    Regular price £23.57
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    80L TIE ROD KIT (4 Rods / kit) 9 Bank M8x1.25 469mm long

    Key Features

    • Valve size: 80l
    • Banks: 9 bank
    • Rod thread: 8x1.25
    • Rod length: 469 mm
    • Set: 4 tie rods per kit
    • Use: assemble sectional valve stack
    Regular price £23.57
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 80L- 90L- 100L - 120L Control Valve Relief Cart 20- 315 BAR - Approved Hydraulics Limited
    Regular price £39.90
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    • Delivery to UK & Ireland

    80L- 90L- 100L - 120L Control Valve Relief Cart 20- 315 BAR

    Key Features

    • Type: adjustable pressure relief cartridge
    • Set range: 20 ; 315 bar
    • Compatibility: 80l ; 90l ; 100l ; 120l ; 150l ; 160l valve families
    • Role: protects circuit by limiting inlet or service port pressure
    • Use: maintenance replacement for OEM cartridge
    Regular price £39.90
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 80L-100L Control Valve Adjustable Service Port Relief + Anti Cav. 0-315 Bar - Approved Hydraulics Limited
    Regular price £63.25
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    • Delivery to UK & Ireland

    80L-100L Control Valve Adjustable Service Port Relief + Anti Cav. 0-315 Bar

    Key Features

    • Series: 80L GS sectional control valve
    • Pressure setting: 315 bar fixed
    • Function: port relief + anti-cavitation check
    • Typical use: protects service ports ; motor overrun protection
    • Installation: fits working section service port cavity
    Regular price £63.25
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 80L-100L-150L Control Valve  3/8" Tapered Grub Screw For Carry-over Facility - Approved Hydraulics Limited
    Regular price £2.02
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    • Delivery to UK & Ireland

    80L-100L-150L Control Valve 3/8" Tapered Grub Screw For Carry-over Facility

    Key Features

    • Part: tapered grub screw for carry over facility
    • Thread: 3/8"
    • Compatibility: 80l ; 100l ; 150l valve families
    • Purpose: secures or blanks internal carry over drilling
    • Use: fitted during conversion to power beyond or closed centre
    Regular price £2.02
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 80L-100L-150L Control Valve Carry Over Plug  3/8" - Approved Hydraulics Limited
    Regular price £1.80
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    80L-100L-150L Control Valve Carry Over Plug 3/8"

    Key Features

    • Function: high pressure carry over ; power beyond
    • Thread: 3/8" bsp
    • Compatibility: 80l ; 100l ; 150l valve families
    • Use case: connect upstream valve to downstream control valve
    • System rating: for host valves operating to 315 bar
    Regular price £1.80
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 80L-100L-150L Control Valve Unloader Valve (ELP)  Without Coil  (See Coils 20032268 12V or 20032269 for 24V)
    Regular price £186.90
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    • Delivery to UK & Ireland

    80L-100L-150L Control Valve Unloader Valve (ELP) Without Coil (See Coils 20032268 12V or 20032269 for 24V)

    Key Features

    • Type: unloader valve block (elp pattern) without coil
    • Compatibility: 80l ; 100l ; 150l sectional series
    • Coils: accepts 12 vdc coil 20032268 ; 24 vdc coil 20032269
    • Function: unloads pump to tank on command to reduce heat and load
    • Control interface: electric coil actuation ; manual overrides available on some variants
    Regular price £186.90
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 80L-90L-100L-120L-150L control valve Detent Kit (9B)  Detent In A Position
    Regular price £43.92
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    • Delivery to UK & Ireland

    80L-90L-100L-120L-150L control valve Detent Kit (9B) Detent In A Position

    Key Features

    • Function: Detent in A position ; positions 0 and B spring centered
    • Kit code: 9B
    • Compatibility: 80L ; 90L ; 100L ; 120L ; 150L control valves
    • Use: Hold spool at full A
    • Additional info: See product data sheet for detailed measurements
    Regular price £43.92
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    • Order by 3pm for Next Day Delivery
  • 80L-90L-100L-120L-150L control valve Detent Kit 10B Detent In B Position
    Regular price £37.86
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    • Delivery to UK & Ireland

    80L-90L-100L-120L-150L control valve Detent Kit 10B Detent In B Position

    Key Features

    • Function: Detent in B position ; positions 0 and A spring centered
    • Kit code: 10B
    • Compatibility: 80L ; 90L ; 100L ; 120L ; 150L control valves
    • Use: Hold spool at full B
    • Additional info: See product data sheet for detailed measurements
    Regular price £37.86
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery

All for Professional Hydraulic Applications

Discover quality all 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.