Medium Bore Pneumatic Diaphragm Single Seat Control Valve – Positioner Calibration Guide

4 week ago

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Hangzhou Baoheng Valve Manufacturing Co., Ltd.

3 month

Product details

The Pneumatic Diaphragm Single Seat Control Valve is a universally applicable, top‑guided globe valve that offers excellent throttling control for a wide variety of clean and moderately dirty liquids, gases, and steam. Its simple, rugged design features a single‑seat plug that provides tight shut‑off (ANSI Class IV or V) and a wide adjustable range (up to 50:1). The pneumatic actuator, with its large diaphragm area, delivers smooth and responsive modulation even at low supply pressures, making it ideal for general industrial process control. The valve body is available in cast carbon steel, stainless steel, or specialty alloys, and the trim can be hardened for abrasive services. This valve is extensively used in papermaking for basis weight control, in food processing for ingredient dosing, and in mining for slurry thickener underflow. It serves as a dependable Pressure Control Valve in compressed air headers and as a Temperature Regulating Valve in jacketed vessel heating circuits. When outfitted with a digital positioner, it becomes a full Intelligent Control Valve capable of HART or PROFIBUS communication, facilitating plant‑wide asset management. For systems requiring flow rate control, it can be configured as a Flow Control Valve with an integral orifice plate and differential pressure transmitter. The bonnet design includes an extended neck for high‑temperature services (up to 450°C) and a bellows seal for toxic or volatile media. Maintenance is simplified by the top‑entry cage, which allows trim removal without dismantling the body from the pipeline. The valve also features a reversible actuator yoke, enabling field conversion of action direction. Our quality control includes 100% seat leak testing with high‑pressure air or water. Optional accessories such as handwheels, limit switches, and boosters enhance its versatility. With decades of proven performance across industries, this single‑seat control valve remains the benchmark for reliable, cost‑effective process control. Its modular design ensures fast spare parts availability and easy upgrades to meet changing process demands.

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Hangzhou Baoheng Valve Manufacturing Co., Ltd.

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Main Product: Pneumatic Diaphragm PTFE Lined Control Valve , Electric Intelligent Temperature & Flow Control Valve, Self-operated Pressure & Temperature Regulating Valve, Pneumatic V-port PTFE Lined Control Ball Valve, Pneumatic Triple Eccentric Rubber Lined Control Butterfly Valve, Pneumatic O-port Cut-off & Control Ball Valve

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