• 45L FW Lever Operated Monoblock Valve (3/8"BSP)
    Regular price £62.46
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery

    45L FW Lever Operated Monoblock Valve (3/8"BSP)

    Key Features

    • Type: 45l lever operated monoblock valve
    • Ports: 3/8" bsp
    • Spools: double acting sections
    • Relief: adjustable main relief
    • Use: mobile attachments ; tipper ; agricultural circuits
    Regular price £62.46
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Standard 45L Lever Operated Monoblock Valves (3/8"BSP) (1-6 levers)
    Regular price From £73.39
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery

    Standard 45L Lever Operated Monoblock Valves (3/8"BSP) (1-6 levers)

    Key Features

    • Ports: 3/8\" bsp p ; a ; b ; t
    • Nominal flow: 45 lpm ; 65 lpm max
    • Max operating pressure: 315 bar
    • Spools: double acting ; spring return to neutral
    • Carry over: hp carry over port optional
    • Banks: 1 to 6 levers
    • Options: single acting ; motor ; float spools ; detents
    Regular price From £73.39
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Standard 90L Lever Operated Double Acting Monoblock Valves (1/2"BSP) (1-6 Levers)
    Regular price From £89.33
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery

    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
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 120L 1 Bank Monoblock Valve 3/4" Ported Double Acting Spring Return
    Regular price £165.85
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery

    120L 1 Bank Monoblock Valve 3/4" Ported Double Acting Spring Return

    Key Features

    • ["Nominal flow: 120 lpm"
    • Ports: 3/4" bsp p ; a ; b ; t
    • Spool: double acting ; 3 position spring return
    • Working pressure: 250 bar max
    • Circuit: parallel ; hp carry over optional by kit
    • Mounting: 3 x 11 mm holes ; base mount
    • "Operating temp: -30 c to +80 c"]
    Regular price £165.85
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • 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.

  • 160L Monoblock Valve 3/4" BSP Double Acting Spring Return
    Regular price From £223.24
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery

    160L Monoblock Valve 3/4" BSP Double Acting Spring Return

    Key Features

    • Nominal flow: 160 lpm
    • Max flow: 200 lpm
    • Operating pressure: up to 250 bar
    • Ports: 3/4" bsp
    • Spool: double acting ; spring return to neutral
    • Features: built in adjustable main relief valve
    • Use: high flow mobile hydraulics
    Regular price From £223.24
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Hydra Part Hydra Part Log Splitter Valve 80LPM (A&B 1/2" BSP) (P&T 3/4" BSP) Auto Kick Out - Approved Hydraulics
    Regular price £102.32
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery

    Log Splitter Valve 80LPM (A&B 1/2" BSP) (P&T 3/4" BSP) Auto Kick Out

    Key Features

    • Type: spring centred ; pressure released detent auto return
    • Nominal flow: 80 to 81 l/min
    • Ports: inlet ; outlet 3/4' bsp ; work a ; b 1/2' bsp
    • Function: auto kick out to neutral at end of extend stroke
    • Relief: adjustable system relief integrated
    Regular price £102.32
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • On Sale
    1/2" 4 Bank 45L Monoblock Control Valve
    Regular price £106.80
    Regular price £124.76 Sale price Saving 14%
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery

    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%
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • On Sale
    Hydra Part Standard 90L Lever Operated Monoblock Valves (3/4"BSP) - Approved Hydraulics
    Regular price £276.06
    Regular price £391.97 Sale price Saving 29%
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery

    5 Bank - Standard 90L Lever Operated Monoblock Valves (3/4"BSP)

    Key Features

    • Ports: 3/4\" bsp p ; a ; b ; t
    • Nominal flow: 90 lpm ; 100 lpm max
    • Max operating pressure: 315 bar
    • Spools: double acting ; spring return to neutral
    • Carry over: hp carry over port optional
    • Banks: 1 to 6 levers
    • Options: cable ; joystick ; pneumatic ; electro-hydraulic kits
    Regular price £276.06
    Regular price £391.97 Sale price Saving 29%
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 90L Monoblock 2 Bank With 1 D/A Spool And 1 Float Spool
    Regular price £136.22
    • All Items Guaranteed
    • Delivery to UK & Ireland

    90L Monoblock 2 Bank With 1 D/A Spool And 1 Float Spool

    Key Features

    • Bank count: 2 bank monoblock body
    • Spool set: 1 double acting ; 1 float spool
    • Flow rating: 90 l/min class
    • Control: manual lever operation
    • Feature: float position for implement follow over ground contours
    • Options: power beyond ; cable control kits
    • Applications: loader raise ; lower ; tilt or auxiliary circuits
    Regular price £136.22
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery

Lever Operated Monoblock Valves

Hydra-Part Lever operated control valves offer both great quality and one of the largest flexibility ranges available on the market. The range covers mono-block valves in 45 litre, 90 litre, 120 litre and 160 litre and Sectional valves in 50 litre, 80 litre, 100 litre, 150 litre and 250 litre versions.

Along with a large range of valves available hydra-part valves have one of the largest optional extras available including:

  • SPOOL OPTIONS: Double acting, Single Acting, Motor spool and Float spool
  • LEVER/CONTROL OPTIONS: Cable Control, Joystick, Pilot Operation, Pneumatic Operation, Electro Over Pneumatic, Direct Acting, Electro- Hydraulic, Cross rod kit
  • SPRING CAP OPTIONS: Spring return to centre, 1 pos Detent, 3 pos Detent, Stoke Limiter, Micro-switch
  • EXTRAS: Service port reliefs, High pressure carry-over, Electric dump valve
All our monoblock valves carry a 2 Year Warranty

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.