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Plastic Ball Valve Body Styles Types

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    The plastic ball valve comes in a few different styles:

    1. Trunnion-Mounted Ball Valves
    Trunnion-mounted ball valves contain a pivoting point where a shaft rotates inside part of a cylinder. This construction allows for shutoff and switching through the use of upper and lower bearings. The additional top-and-bottom anchoring of trunnion-style valves also keeps the ball from floating in the fluid. This construction allows for larger valves that function at peak performance in high-pressure operations and with higher flow capacity because the ball has more support, which reduces the friction against it.

    RG Group’s trunnion-mounted ball valves can withstand pressures of up to 10,000 psi and provide dependable switching and shutoff capabilities. The design of the upper and lower bearing in these high-pressure ball valves helps provide seizure resistance and extend the valve’s lifespan, even in rigorous applications.

    2. Floating Ball Valves
    Floating ball valves are one of the most common types of ball valves. Their free-floating ball design allows for strong performance even under challenging pressure and temperature conditions. Unlike the balls in trunnion-mounted valves, the balls in floating ball valves are attached only to the valve stem. The advantage of this construction is that the ball can float in the liquid and press against the seat of the valve, creating a positive seal. A positive seal is useful because it allows for zero leakage from the valve, an essential quality in many gas operations, among others.

    These ball valves are designed for process and instrumentation applications and can streamline fluid flow to enhance those operations. They offer rapid on-off control and can withstand pressures of up to 6,000 psi and temperatures of up to 450 degrees Fahrenheit.

    These valves are useful in facilities such as chemical plants, refineries, power plants and petrochemical plants. They provide a range of functionalities, including flow diversion and flow selection, and are often critical parts of quick-fill systems, process-mixing systems, instrument panels and remote shutoff with actuation. They are also typically less expensive than trunnion designs.

    RG Group’s floating ball valves are generally available in stainless steel and brass, with specific alloys available upon request. The ball bearings feature microfinishes for a positive seal, and the valves allow for a straight flow path that reduces pressure drop. Our products also offer optional features such as pneumatic and electric actuation, live-loaded PTFE stem seals, nonadjustable O-ring stem seals, upstream and downstream drain models and stainless steel and extended handles.

    3. Rising-Stem Ball Valves
    Rising-stem ball valves contain a stem that allows the ball to tilt within the valve. When the valve is closed, the ball nestles snugly against the seat – the disc-shaped material designed to provide a watertight seal. When the valve is open, the ball moves away from the seat, allowing liquid to flow around it.

    The quick connect fitting is also one of our products, welcome to your come and purchase!

     

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