• CMB FK Series Rotating Multi-Processor - Approved Hydraulics Limited

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    CMB FK Series Rotating Multi-Processor

    Key Features

    • Modular jaw kits: Swap jaw sets for different tasks.
    • Quick kit change: Faster changeovers, less downtime.
    • 360° hydraulic rotation: Precise positioning without moving the excavator.
    • Hardox 450 body: High wear resistance.
    • Protected inverted cylinder: Better shielding from debris.
    • 4-way reversible blades: Rotate edges to extend life.
    • Replaceable wear parts: Teeth/wear components change easily.
    • Use: demolition; recycling; site clearance

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    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice
  • CMB CCE Series Crusher

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    CMB CCE Series Crusher

    Key Features

    • Frame: Robust Hardox 450 / Strenx 700 structure
    • Speed Valve: Faster open/close cycle (from CC20E upwards)
    • Crushing power: High clamping force on the tip/teeth
    • Rotation: 360° continuous hydraulic rotation
    • Cylinder protection: Fully protected, reversed-mounted cylinders
    • Pins & bushings: Hardened pins and bushings for durability
    • Wear parts: Reversible blades + interchangeable teeth to reduce downtime

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    • 1 Year Limited Manufacturers Warranty
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  • FH Series Pulveriser

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    FH Series Pulveriser

    Key Features

    • Structure: Hardox 450 wear-resistant body
    • Rotation: 360° continuous hydraulic rotation
    • Power: high crushing/clamping force
    • Hydraulics: Speed Valve for faster cycles (model/option dependent)
    • Protection: inverted, shielded main cylinder layout
    • Wear parts: interchangeable teeth/wear components
    • Compatibility: sized range for excavators from compact to heavy class

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    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
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  • FF Series Pulveriser

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    FF Series Pulveriser

    Key Features

    • Structure: Hardox 450 wear-resistant body
    • Speed Valve: Faster open/close cycle (from FF22)
    • Crushing power: High clamping force for efficient concrete breakdown
    • Cylinder protection: Inverted/fully protected cylinder layout
    • Teeth: Interchangeable teeth for consistent bite performance
    • Tooth plate: Interchangeable tooth plate for easier rebuilds
    • Wear surfaces: Interchangeable wear plates / cutting edges to reduce downtime

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    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
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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.

  • MD Series Crusher

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    MD Series Crusher

    Key Features

    • Frame: STRENX 700 main structure
    • Jaws: HARDOX 450 jaws for wear resistance
    • Multi-kit system: Interchangeable jaws for high versatility
    • Pins & bushings: Hardened pins and bushings for durability
    • Rotation: Reinforced rotating motor with adjustable rotation speed
    • Hydraulic protection: Fully protected hydraulic components
    • Speed Valve: Faster working cycle

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    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice

Pulverisers, Crushers & Multi-Processors

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.