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Worm Drives & Hydraulic Rotary Manifolds
45L Monobloc Valve Direct Acting Electric Solenoid Double Acting Spool (1 8ES) (G)
Key Features
45L Monobloc Valve Direct Acting Electric Solenoid Motor Spool (2 8ES) (G)
45L Monobloc Valve S/Acting B Spool -Blank A port (Reqs 30075301 spring kit)
45L Monoblock Valve S/Acting A Spool -Blank B port (Spool Only - Requires B/Plug, Spring and DOW) (G)
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.
90L Monobloc Valve Single acting spring kit for type 3 & 4 spools
90L-100L-120L-150L Control Valve Lever Box
90L Monobloc Valve Double Acting Spool
90L Monobloc Valve S/Acting A Spool -Blank B port & fit spring kit 30075376
90L Monobloc Valve S/Acting B Spool -Blank A port & fit spring kit 30075376
90L Monoblock Valve Double Acting Spool Type ED-1 Right Inlet
90L Monobloc Valve Motor Spool Type ED-2 Right Inlet
90L - 120L - 150L Control Valve Lever Box With Stroke Limiter
90L - 100L - 120L -150L Control Valve End Cap With Stroke Limiter
90L - 100L - 120L - 150L Control valve Rotary lever kit
90L-100L-120L-150L Vontrol Valve Hyd Proportional Pilot kit (81M)
90L-120L-100L-150L control valve (8D2) Dual control spool connector Kit
80L-90L-100L-120L-150L control valve Pneumatic Kit Cylinder Only (also 8EP3/4 kits)
90L Monobloc valve single Acting Detent (B Blanked)
90L Monobloc valve single Acting Detent (A Blanked)
90LS & 90L Single Microswitch Kit (Req's switch N/O 30075320 or N/C 20010687 extra as needed - Not included)
8EP4 Air manifold (block only) for electro / pneumatic valve operation (Fits all air cylinders)
45L Monobloc Valve Double Acting Spool Type 1 (G)
240L Control Valve 1" Left Inlet Section With Direct PRV Type AC (60-315 Bar Max)
240L 1.1/4" Outlet Section Type (RC)
Discover quality shop all components 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. Browse related products including control valves, line mounted valves 1, hydraulic cylinders, hydraulic pumps to find the right solution for your hydraulic system. With fast UK delivery and expert technical support, Approved Hydraulics supplies hydraulic equipment you can rely on.
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.
