• Bini Rotary Manifold DA Series (2-8 Channels) - Approved Hydraulics
    Regular price From £648.06
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    Rotary Manifold DA Series (2-8 Channels)

    Key Features

    • Type: hydraulic rotary manifold
    • Channels: 2–8 hydraulic passages
    • Rated pressure: up to 420 bar
    • Speed: 0–12 rpm recommended
    • Mounting: vertical axis; no axial or radial loads
    Regular price From £648.06
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  • Bini Rotary Manifold DI Series (2-18 Channels) - Approved Hydraulics

    POA

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    Rotary Manifold DI Series (2-18 Channels)

    Key Features

    • Type: hydraulic rotary manifold for multi-channel transfer
    • Channels: 2–18 hydraulic passages
    • Rated pressure: up to 420 bar
    • Speed: 0–12 rpm continuous rotation
    • Option: add electrical swivel for hybrid transfer

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    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice
  • Bini Rotary Manifold DM Series (7-11 Channels) - Approved Hydraulics

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    Rotary Manifold DM Series (7-11 Channels)

    Key Features

    • Type: compact rotary manifold
    • Channels: 7–11 hydraulic passages
    • Rated pressure: up to 420 bar
    • Ports: BSP 1/8" to 1/2" depending on size
    • Use: small/medium rotary equipment

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  • Bini Rotary Manifold DPC Series (8-18 Channels) - Approved Hydraulics

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    Rotary Manifold DPC Series (8-18 Channels)

    Key Features

    • Type: rotary manifold with fixed 3/8" BSP ports
    • Channels: 8–18 hydraulic passages
    • Rated pressure: up to 420 bar
    • Speed: 0–12 rpm
    • Use: high channel count applications

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    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice
  • 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.

  • Out of Stock
    Bini Rotary Coupling 4 port - 3/4" Bsp - 420 Bar
    Regular price £1,194.24
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    Bini Rotary Coupling 4 port - 3/4" Bsp - 420 Bar

    Key Features

    • Model: DA085-04 4-port coupling
    • Ports: 3/4" BSP threaded
    • Pressure rating: up to 420 bar
    • Use: fluid transfer between stationary and rotating parts
    • Note: data sheet available for detailed dimensions
    Regular price £1,194.24
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Bini Electrical Swivel (CE Series) - Approved Hydraulics

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    Electrical Swivel (CE Series)

    Key Features

    • Type: electrical slip ring for power and signals
    • Cables: 0.75–4 mm2 cross section; 3 m pigtails each side
    • Options: gold plated contacts for CANBUS signals
    • Integration: can be combined with hydraulic manifold
    • Use: continuous electrical transfer on rotating joints

    POA

    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice
  • LS1 360° Rotary Actuator
    Regular price £3,960.06
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    LS1 360° Rotary Actuator

    Key Features

    • Rotation: 360 °
    • Torque: 2700 Nm
    • Max working pressure: 210 bar
    • Specification: Load holding valve.
    • Radial load capacity: 6700 kg
    • Axial load capacity: 6700 kg
    • Specification: Industrial Heavy load rotation
    • Specification: Manufacturing jig operation
    • Specification: Civil engineering grapple rotation applications
    • Specification: Access platform rotation
    Regular price £3,960.06
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery

Hydraulic Rotary Manifolds & Electrical Rotary Swivels

These units are used on any requirement for transmitting fluids (hydraulic oil, water, diesel) between a stationary and a rotating part. Since applications have many different requirements, BINI have developed an extensive range of models. Each unit is manufactured from the highest quality components such as high-grade alloyed steels, quality pressure seals, bushes and bearings. The full manufacturing process is controlled by BINI from start to finish to ensure every product operates to its maximum capability.

Typical applications – Agricultural Machinery – Earth Moving Machines – Truck cranes & Platform lifts - Marine & Off-shore Cranes – Boring & Drilling Machines – Demolition & Recycling Machines – Forestry Machines – Excavator and Handling Equipment

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.