• Suction Filter 3/8" BSPF 8lpm
    Regular price £3.12
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    Suction Filter 3/8" BSPF 8lpm

    Key Features

    • Connection: 3/8" bspp female
    • Max flow: 8 l/min
    • Type: in tank suction strainer
    • Use: protects pump inlet on mini power packs
    • Installation: screws into suction port inside tank
    Regular price £3.12
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  • Padlock for Pad Cages
    Regular price £3.06
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    Padlock for Pad Cages

    Key Features

    • Model: PADCAGE-PADLOCK-20MM
    • Purpose: locking pad for stabiliser pad storage cage systems
    • Security level: moderate site security
    • Use: secures cage door during storage and transport
    • Material: hardened shackle with compact body
    Regular price £3.06
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  • 240L Control Valve Carry Over Plug 3/4" (RE)
    Regular price £2.90
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    240L Control Valve Carry Over Plug 3/4" (RE)

    Key Features

    • Component: carry over plug ; power beyond adaptor
    • Thread/size: 3/4" bsp
    • Compatibility: 240l sectional control valve series
    • Function: routes pump flow to downstream valve while maintaining tank return on first valve
    • Port: fits carry over C port on sectional inlet/tank arrangement
    • System pressure (series ref): up to 315 bar typical for 240l sectional valves
    Regular price £2.90
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  • Springs for PRC 80 Relief Valve 130-350 bar
    Regular price £2.77
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    Springs for PRC 80 Relief Valve 130-350 bar

    Key Features

    • Valve family: OFC PRC 80 pressure relief cartridge ; M26x1.5
    • Spring code: 30 set range 130–350 bar for PRC80
    • Alt ranges: 10 5–50 bar ; 20 30–260 bar options
    • Rated flow: 80 l.min cartridge capacity
    • Max working pressure: 350 bar
    • Adjustment styles: socket screw A ; handknob B ; tamperproof cap C
    • Materials: zinc plated steel cartridge ; hardened internals
    Regular price £2.77
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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.

  • 50L Control Valve High Pressure Carry Over Taper Blanking Plug 1/4"
    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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  • Hexagon Socket Plug G1/4 - Approved Hydraulics Limited
    Regular price £2.59
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    Hexagon Socket Plug G1/4

    Key Features

    • Thread: g 1/4 bspp
    • Standard: din 908 screw plug ; hex socket with collar
    • Material: steel ; zinc plated
    • Use: blanking of hydraulic manifold ports ; test points
    • Sealing: with soft metal washer ; or bonded seal ; or o ring face
    Regular price £2.59
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  • Knob Model 1052/M d. 40 M10x30
    Regular price £2.47
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    Knob Model 1052/M d. 40 M10x30

    Key Features

    • Diameter: 40 mm
    • Thread: m10 stud
    • Stud length: 30 mm
    • Grip: round knob; ribbed edge
    • Material: thermoplastic knob; steel stud
    • Use: panel; lever; valve actuation handle
    Regular price £2.47
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    • Order by 3pm for Next Day Delivery
  • Cylinder Seal Kit for Intermercato TG 12, 16, 19, 16 PRO, 16 EG - Approved Hydraulics Limited
    Regular price £2.40
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    50L Spool Seal Kit (1 x spool)

    Key Features

    • For: 50l control valve spool
    • Contents: seals for one spool
    • Purpose: restore sealing ; prevent internal leakage
    • Use: maintenance / overhaul of spool section
    • Application: hydraulic component
    Regular price £2.40
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Cylinder Seal Kit for Intermercato TG 12, 16, 19, 16 PRO, 16 EG - Approved Hydraulics Limited
    Regular price £2.40
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    45L Control Valve Spool Seal Kit (1 x Spool)

    Key Features

    • Compatibility: 45l monoblock valve spool set (1 x spool)
    • Purpose: replace worn spool seals to reduce internal leakage and restore performance
    • Kit coverage: seals for one spool only
    • Cleanliness target (valve family): iso 4406 class 19/16
    • Typical medium: mineral hydraulic oil iso vg 32 ; 46
    • Installation note: lubricate seals and avoid damage during spool insertion
    Regular price £2.40
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Cylinder Seal Kit for Intermercato TG 12, 16, 19, 16 PRO, 16 EG - Approved Hydraulics Limited
    Regular price £2.40
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    50L Spool Seal Kit (1 x spool)

    Key Features

    • Compatibility: Hydra Part sectional control valves nominal 50 L/min class ; one spool section
    • Intended use: repack a single working section to cure external leaks and spool drag
    • Typical kit contents: spool o rings ; end cap seals ; dust seals used on 50L sections
    • Valve family: 3/8 inch port sectional valve spares range for 50 LPM systems
    • Install tip: clean bore ; lightly lubricate seals ; verify spool end float after rebuild
    • Result: restores smooth lever or solenoid actuation and reduces leakage to atmosphere
    Regular price £2.40
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  • 45L Monobloc Valve End Cap Cover Only For Spring (G)
    Regular price £2.40
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    45L Monobloc Valve End Cap Cover Only For Spring (G)

    Key Features

    • Function: protective end cap cover for spring cavity
    • Compatibility: 45l monobloc valve series
    • Use: service replacement when lever box is removed
    • Position: mounts on spool end cap side
    • Note: cover only ; spring kit supplied separately
    Regular price £2.40
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  • 1-1/2" Bonded seal
    Regular price £2.33
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    1-1/2" Bonded seal

    Key Features

    • Type: bonded seal ; dowty washer
    • Size: 1/2"
    • Elastomer: nitrile nbr
    • Use: seals bspp bolt faces ; banjo fittings
    • Application: hydraulic system component
    Regular price £2.33
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  • M5 x 110 CAP head bolt
    Regular price £2.22
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    M5 x 110 CAP head bolt

    Key Features

    • Thread: metric M5
    • Length: 110 mm
    • Head: socket cap
    • Material: high tensile steel (typical)
    • Use: hydraulic assemblies; brackets; adapters
    • Drive: internal hex for controlled tightening
    Regular price £2.22
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    • Order by 3pm for Next Day Delivery
  • M5 x 120 Cap Head bolt
    Regular price £2.22
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    M5 x 120 Cap Head bolt

    Key Features

    • Fastener type: socket cap screw
    • Thread: metric M5
    • Length: 120 mm
    • Drive: internal hex (Allen)
    • Use: hydraulic brackets; manifolds; general assemblies
    Regular price £2.22
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    • Order by 3pm for Next Day Delivery
  • M5 x 150 Cap head bolt
    Regular price £2.21
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    M5 x 150 Cap head bolt

    Key Features

    • Fastener type: socket cap screw
    • Thread: metric M5
    • Length: 150 mm
    • Drive: internal hex for controlled tightening
    • Use: hydraulic assemblies; covers; brackets
    Regular price £2.21
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  • 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
  • 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
  • Manifold Flange Assembly Screw For Mounting kit for frame 90 & 100/112 B14 AC motor
    Regular price £1.88
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    Manifold Flange Assembly Screw For Mounting kit for frame 90 & 100/112 B14 AC motor

    Key Features

    • Standard: din 912
    • Thread: m8 x 30
    • Use: manifold flange to kit frames 90 ; 100/112 b14
    • Material: steel
    • Quantity: set of 4 typical
    Regular price £1.88
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    • Delivery to UK & Ireland
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  • Manifold Flange Assembly Screw For Mounting kit for frame 71 & 80 B14 AC motor
    Regular price £1.86
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    Manifold Flange Assembly Screw For Mounting kit for frame 71 & 80 B14 AC motor

    Key Features

    • Standard: din 912
    • Thread: m8 x 25
    • Use: manifold flange to kit frames 71 ; 80 b14
    • Material: steel
    • Quantity: set of 4 typical
    Regular price £1.86
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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
    Regular price £1.86
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    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 £1.86
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Suction pipe horizonal
    Regular price £1.81
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    Suction pipe horizonal

    Key Features

    • Use: mini power pack component
    • Note: verify variant against datasheet
    • Compatibility: as per title family
    • Application: hydraulic system component
    • Application: hydraulic system component
    Regular price £1.81
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  • 80L-100L-150L Control Valve Carry Over Plug  3/8"
    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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  • Return Pipe Vertical 320mm
    Regular price £1.60
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    Return Pipe Vertical 320mm

    Key Features

    • Orientation: vertical
    • Length: 320 mm
    • Connection: g 1/4 interface
    • Use: return oil from manifold to tank
    • Application: mini power pack
    Regular price £1.60
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    • Order by 3pm for Next Day Delivery
  • Plastic plug G1/4 - Approved Hydraulics Limited
    Regular price £1.60
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    Plastic plug G1/4

    Key Features

    • Thread: g 1/4 bspp
    • Type: plastic protective plug
    • Use: blank unused manifold ports
    • Install: finger fit ; remove before service
    • Application: hydraulic system component
    Regular price £1.60
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery

Hydra Part

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.