• TEC TEC Single Phase Electric Motors - 2 Pole, 3000rpm, 240vAC (PERMANENT CAP) - Approved Hydraulics
    Regular price From £71.99
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    TEC Single Phase Electric Motors - 2 Pole, 3000rpm, 230vAC (PERMANENT CAP)

    Key Features

    • Type: single phase permanent capacitor psc induction motor
    • Speed: 2 pole 3000 rpm nominal at 50 hz
    • Starting: low current ; moderate starting torque
    • Enclosure: tefc ip55 aluminium frame
    • Insulation: class f with ptc 130°c thermal
    • Duty: s1 continuous ic411 cooling
    • Voltage: 230 ; 400 vac 50 hz three phase or 230 vac single phase per model
    • Mounting: b3 foot ; b5 flange ; b14 face options
    • Standards: iec 60034 ; ie3 or ie2 efficiency classes
    Regular price From £71.99
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  • TEC TEC Single Phase Electric Motors - 4 Pole, 1500rpm (CAP START / CAP RUN) - Approved Hydraulics
    Regular price From £87.40
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    TEC Single Phase Electric Motors - 4 Pole, 1500rpm (CAP START / CAP RUN)

    Key Features

    • Type: single phase cap start ; cap run induction motor
    • Speed: 4 pole 1500 rpm nominal at 50 hz
    • Starting: high starting torque for heavy loads
    • Enclosure: tefc ip55 aluminium frame
    • Insulation: class f with ptc 130°c thermal
    • Duty: s1 continuous ic411 cooling
    • Voltage: 230 ; 400 vac 50 hz three phase or 230 vac single phase per model
    • Mounting: b3 foot ; b5 flange ; b14 face options
    • Standards: iec 60034 ; ie3 or ie2 efficiency classes
    Regular price From £87.40
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • TEC TEC Single Phase Electric Motors - 2 Pole, 3000rpm (CAP START / CAP RUN) - Approved Hydraulics
    Regular price From £95.95
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    • Delivery to UK & Ireland

    TEC Single Phase Electric Motors - 2 Pole, 3000rpm (CAP START / CAP RUN)

    Key Features

    • Type: single phase cap start ; cap run induction motor
    • Speed: 2 pole 3000 rpm nominal at 50 hz
    • Starting: high starting torque for heavy loads
    • Enclosure: tefc ip55 aluminium frame
    • Insulation: class f with ptc 130°c thermal
    • Duty: s1 continuous ic411 cooling
    • Voltage: 230 ; 400 vac 50 hz three phase or 230 vac single phase per model
    • Mounting: b3 foot ; b5 flange ; b14 face options
    • Standards: iec 60034 ; ie3 or ie2 efficiency classes
    Regular price From £95.95
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • TEC TEC 3 Phase Electric Motors - 2 Pole, 3000rpm (IE2 High Efficiency) - Approved Hydraulics
    Regular price From £57.17
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    TEC 3 Phase Electric Motors - 2 Pole, 3000rpm (IE2/IE3 High Efficiency)

    Key Features

    • Type: three phase induction motor
    • Speed: 2 pole 3000 rpm nominal at 50 hz
    • Enclosure: tefc ip55 aluminium frame
    • Insulation: class f with ptc 130°c thermal
    • Duty: s1 continuous ic411 cooling
    • Voltage: 230 ; 400 vac 50 hz three phase or 230 vac single phase per model
    • Mounting: b3 foot ; b5 flange ; b14 face options
    • Standards: iec 60034 ; ie3 or ie2 efficiency classes
    Regular price From £57.17
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    • Order by 3pm for Next Day Delivery
  • 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.

  • ABER Tipping Valves (130 lpm, 350 bar) - Approved Hydraulics Limited
    Regular price £226.91
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    ABER Tipping Valves (130 lpm, 350 bar)

    Key Features

    • Max flow: up to 130 l/min
    • Working pressure: up to 300 bar
    • Relief valve setting: 350 bar
    • Ports: P/C/T 3/4" BSP; pilot 1/8" BSP
    • Control: pneumatic or manual
    • Application: single-acting tipping gear (open circuit, progressive descent)
    • Approx weight: ~5.2 kg
    • Mounting: direct to tank or chassis
    Regular price £226.91
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  • Standard 90L Lever Operated Double Acting Monoblock Valves (1/2"BSP) (1-6 Levers) - Approved Hydraulics Limited
    Regular price From £89.33
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    Standard 90L Lever Operated Double Acting Monoblock Valves (1/2"BSP) (1-6 Levers)

    Key Features

    • Nominal Flow Rating: 90L/Min
    • Max Flow: 100L
    • Max Operating Pressure: 315 Bar - 4600 Psi
    • Specification: Built In Port For The Option Of A High Pressure Carry Over
    • Specification: Pneumatic kits for air operation
    • Ports: 1/2" BSP
    • Levers: 1-6 options
    • Specification: 1/2" Ported Double Acting Monoblock Valves
    • Specification: Built in Adjustable Main Relief Valve
    • Specification: Spring Return To Neutral
    Regular price From £89.33
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  • Hydra Part Hammer Style Post Drivers - Approved Hydraulics

    POA

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    Hammer Style Post Drivers

    Key Features

    • Notes: Specification information is limited in source listing; confirm dimensions and compatibility before purchase
    • Notes: Details not stated
    • Notes: Details not stated
    • Notes: Details not stated
    • Notes: Details not stated

    POA

    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice
  • Femac Series 6 Backhoe - Approved Hydraulics

    POA

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    Series 6 Backhoe

    Key Features

    • Tractor power: 75-110 hp class
    • Hydraulics: independent tank ; pump system
    • Rotation: 180° central
    • Stabilizers: independent ; block valves
    • Use: municipal ; farm works

    POA

    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice
  • Femac Series 5 Backhoe - Approved Hydraulics

    POA

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    Series 5 Backhoe

    Key Features

    • Tractor power: 55-90 hp class
    • Hydraulics: independent system ; tank and pump
    • Rotation: 180° central
    • Stabilizers: independent ; check valves
    • Buckets: 250-1200 mm options

    POA

    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice
  • Femac Series 3 Backhoe - Approved Hydraulics

    POA

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    Series 3 Backhoe

    Key Features

    • Tractor power: 20-30 hp class
    • Hydraulics: independent system with pump ; tank
    • Rotation: 180° central
    • Stabilizers: independent with block valves
    • Use: light digging ; smallholdings

    POA

    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice
  • Femac Series 4 Backhoe - Approved Hydraulics

    POA

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    Series 4 Backhoe

    Key Features

    • Tractor power: 35-55 hp class
    • Hydraulics: independent system
    • Rotation: 180° central
    • Features: anti-cavitation valves ; floating head
    • Buckets: 300 mm standard ; options available

    POA

    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice
  • Approved Hydraulics AV800CS Hydraulic Cone Splitter - Approved Hydraulics

    POA

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    AV800CS Hydraulic Cone Splitter

    Key Features

    • Machine: Avant Loader specific
    • Weight: ~185kg excluding hitch
    • Cone: 250mm diameter x 400mm long; removable hardened tip
    • Hydraulic motor: max torque ~2475 N·m
    • Typical max log size: ~3m long x 1.3m diameter
    • Supply: includes hitch and hoses

    POA

    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice
  • Hydra Part Side Mounted Steel Hydraulic Oil Tanks With Filter (15L-80L) - Approved Hydraulics
    Regular price From £206.71
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    Side Mounted Steel Hydraulic Oil Tanks With Filter (15L-60L)

    Key Features

    • Construction: 2 mm steel ; robot welded ; pneumatically tested
    • Finish: 2 coat black paint
    • Return filtration: 25 micron return filter included
    • Mounting: side mounted
    • Capacities: 15l-60l
    Regular price From £206.71
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  • Approved Hydraulics AH469PD Vibrating Post Driver - Approved Hydraulics

    POA

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    AH469PD Vibrating Post Driver

    Key Features

    • Attachment: excavator vibrating post driver
    • Centrifugal force: 45 kn at 50 hz ; amplitude 2.10 mm
    • Reduced force mode: 22 kn at 35 hz ; amplitude 3.75 mm
    • Hydraulic requirement: min 26 lpm @ 166 bar
    • Post sizes: 4" ; 6" ; 9" cups ; bespoke options
    • Weight: 245 kg approx
    • Supplied with: hitch bracket ; hoses ; qr couplers ; spare buffers ; 2 cups

    POA

    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice
  • Baltrotors BR4-A Link - Approved Hydraulics
    Regular price £464.40
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery

    BR4-A Link

    Key Features

    • Type: single swing‑damper link (A variant)
    • Max load: 5.5 t
    • Upper connection: fork 71 mm; 30 mm pin
    • Lower connection: fork 30 mm pin
    • Service: grease regularly; 120 Nm pin‑nut torque
    Regular price £464.40
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Baltrotors BR4 Link - Approved Hydraulics
    Regular price £464.40
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    BR4 Link

    Key Features

    • Type: single swing‑damper link
    • Max load: 5.5 t
    • Upper connection: fork 71 mm; 30 mm pin
    • Lower connection: fork 25 mm pin
    • Service: grease regularly; 120 Nm pin‑nut torque
    Regular price £464.40
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    • Order by 3pm for Next Day Delivery
  • Baltrotors BR3 Link - Approved Hydraulics
    Regular price From £494.40
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    BR3 Link

    Key Features

    • Type: link (no brake) for 12–16 t rotators
    • Max load: 16 t
    • Upper connection: eye; 80 or 100 mm width options
    • Lower connection: fork; 30–45 mm pin options
    • Service: grease at 8‑hour intervals
    Regular price From £494.40
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  • Baltrotors BR2 Link - Approved Hydraulics
    Regular price From £367.26
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    BR2 Link

    Key Features

    • Type: link (no brake) heavy class
    • Max load: 10 t
    • Upper connection: eye 80 mm; 30–45 mm pin options
    • Lower connection: eye 35 mm pin
    • Service: grease through nipples; 120 Nm nut torque
    Regular price From £367.26
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  • Baltrotors BR1A Link - Approved Hydraulics
    Regular price £286.80
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    BR1A Link

    Key Features

    • Type: link (no brake) with alternative dimensions
    • Upper connection: eye; sizes 60/70/80 mm
    • Lower connection: fork 30 mm pin
    • Max load: 5.5 t (family)
    • Service: torque locking nut to spec; periodic greasing
    Regular price £286.80
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    • Order by 3pm for Next Day Delivery
  • Baltrotors BR1 Link - Approved Hydraulics
    Regular price £286.80
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    BR1 Link

    Key Features

    • Type: link (no brake)
    • Max load: 5.5 t
    • Upper connection: eye (60/70/80 mm widths; 20–45 mm pins)
    • Lower connection: fork 25 mm pin
    • Service: grease every 8 working hours
    Regular price £286.80
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Male to Female Pressure Gauge Adapters - Approved Hydraulics Limited
    Regular price From £7.16
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    Male to Female Pressure Gauge Adapters

    Key Features

    • Type: male to female pressure gauge adaptor
    • Thread: bsp
    • Use: connect 1/4 ; 3/8 ; 1/2" gauge threads to system ports
    • Material: plated steel or brass per size
    • Sizes: common sizes stocked ; see options
    Regular price From £7.16
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  • AGRI PTO Gear Box 3:1 ratio for Group 2 Pumps - Male Shaft - Approved Hydraulics Limited
    Regular price From £127.08
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    AGRI PTO Gear Box 3:1 ratio for Group 2 Pumps - Male Shaft

    Key Features

    • Type: agricultural pto overgear
    • Ratio: 3 . 1
    • Pump interface: group 2
    • Output shaft: male
    • PTO speed: 540 rpm input ; geared for pump speed
    • Lubrication: sae 90 oil ; check level at 1500 h ; first change 60-80 h
    • Use: connects tractor pto to hydraulic gear pump
    Regular price From £127.08
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    • Order by 3pm for Next Day Delivery
  • AGRI PTO Gear Box 3:1 ratio for Group 2 or 3 Pumps - Female Shaft - Approved Hydraulics Limited
    Regular price From £237.66
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    AGRI PTO Gear Box 3:1 ratio for Group 2 or 3 Pumps - Female Shaft

    Key Features

    • Type: agricultural pto overgear
    • Ratio: 3 . 1
    • Pump interface: group 2 ; 3
    • Output shaft: female
    • PTO speed: 540 rpm input ; geared for pump speed
    • Lubrication: sae 90 oil ; check level at 1500 h ; first change 60-80 h
    • Use: connects tractor pto to hydraulic gear pump
    Regular price From £237.66
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Hydra Part FLOW DIVIDER/COMBINER 0 In line 3/8" BSP in/out 13-23 lpm - Approved Hydraulics
    Regular price £155.40
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    FLOW DIVIDER/COMBINER 50/50 In line 3/8" BSP in/out 13-23 lpm

    Key Features

    • Function: 50 ; 50 flow divider ; combiner
    • Porting: 3/8" bsp
    • Flow range: 13-23 lpm
    • Accuracy: maintains equal flows within typical tolerance
    • Use: synchronise two actuators ; recombine return flow
    • Mounting: in line
    Regular price £155.40
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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.