Pneumatic Sanitary Threaded Butterfly Valve is a sanitary butterfly valve driven by a pneumatic actuator with threaded end connections. It is mainly applied for media shut‑off and flow regulation in clean piping systems. The valve body is normally manufactured from 304 or 316L stainless steel. Featuring smooth internal flow passages and compact construction, it effectively minimizes media retention and sanitary dead‑legs, suitable for industrial applications with stringent hygiene and cleanliness requirements.
Operating Principle of Sanitary Threaded Pneumatic Butterfly Valve for Food & Pharmaceutical Processing
Opening Stroke: Compressed air enters the pneumatic actuator and generates rotational torque to drive the valve stem. The disc gradually rotates to a position parallel to the pipeline flow‑path. When the disc approaches the fully‑open position, the flow passage is substantially unobstructed with low fluid resistance.
Closing Stroke: Upon receiving control signals, the actuator rotates in reverse and turns the disc to a position perpendicular to the pipeline flow‑path. The disc presses tightly against the sanitary‑grade seat to achieve reliable sealing and shut off the media flow.
Automatic Control: Fitted with solenoid valves, limit switches or positioners, the valve carries out automatic opening and closing in response to signals from PLC / DCS control systems. Spring‑return single‑acting or double‑acting pneumatic actuators are optional to meet various automatic control working conditions.
Pneumatic butterfly valves are widely used in industrial piping systems for fast, automatic and reliable flow isolation and regulation. Equipped with pneumatic actuators, these valves enable remote operation and can be integrated with PLC, DCS and automatic control systems for efficient process control. Key parameters including working temperature, medium, pressure rating, valve size, actuator type and connection standard should be confirmed before ordering to ensure proper valve selection. Customized valve sizes, pressure ratings, connection types, sealing materials, body materials and pneumatic actuator configurations are available for various industrial and non-standard applications. (Unit: mm)
| Size | inch | Type/Class | Part No | 0 | G | A | Dc | H1 | H | |
|---|---|---|---|---|---|---|---|---|---|---|
| DN20 | 0.75 | D621F-PN10 | D621FP10XLX075 | 78.0 | RD44*1/6 | 66.0 | 85.0 | 150.0 | 227.5 | |
| DN25 | 1 | D621F-PN10 | D621FP10XLX1 | 78.0 | RD52*1/6 | 66.0 | 85.0 | 150.0 | 227.5 | |
| DN32 | 1.25 | D621F-PN10 | D621FP10XLX125 | 86.0 | RD58*1/6 | 66.0 | 85.0 | 150.0 | 227.5 | |
| DN40 | 1.5 | D621F-PN10 | D621FP10XLX15 | 90.0 | RD65*1/6 | 70.0 | 85.0 | 150.0 | 231.0 | |
| DN50 | 2 | D621F-PN10 | D621FP10XLX2 | 106.0 | RD78*1/6 | 76.0 | 85.0 | 150.0 | 237.0 | |
| DN65 | 2.5 | D621F-PN10 | D621FP10XLX25 | 124.0 | RD95*1/6 | 80.0 | 85.0 | 150.0 | 242.0 | |
| DN80 | 3 | D621F-PN10 | D621FP10XLX3 | 139.0 | RD110*1/4 | 84.0 | 85.0 | 180.5 | 2835 | |
| DN100 | 4 | D621F-PN10 | D621FP10XLX4 | 159.0 | RD130*1/4 | 104.0 | 108.0 | 180.5 | 295.5 | |
| DN125 | 5 | D621F-PN10 | D621FP10XLX5 | 186 | RD160*1/4 | 130.0 | 108.0 | 250.0 | 389.0 | |
| DN150 | 6 | D621F-PN10 | D621FP10XLX6 | 225.0 | RD190*1/4 | 150.0 | 133.0 | 250.0 | 415.0 |
Sanitary threaded butterfly valves adopt threaded end connections, offering easy installation and compact construction. They are particularly suitable for sanitary‑grade equipment, pipelines and small‑bore fluid transfer systems. When assembled with pneumatic actuators, fast opening and closing can be achieved by compressed air. Optional accessories such as solenoid valves, limit switches and valve positioners can be installed to interface with PLC, DCS and other automatic control systems, realizing remote automated control.
Pneumatic sanitary threaded butterfly valves are widely used in food, beverage, dairy, biopharmaceutical, cosmetic, brewing and other clean‑fluid systems. They are compatible with water, purified water, beverages, dairy products, alcohol and other sanitary‑grade liquid media.
