**Pneumatic Teflon Lined Diaphragm Valve for Flow Control** This pneumatic Teflon lined diaphragm valve is specifically designed for precise flow control and shut-off of corrosive media in both liquid and gaseous forms. It is widely used in industries such as chemical processing, petrochemicals, pharmaceuticals, and more. The valve offers excellent corrosion resistance and long service life, making it a reliable choice for demanding environments. **Key Features:** - **Model No.:** G641PFA - **Connection Type:** Flanged Diaphragm Valve - **Structure:** Weir Diaphragm Valve - **Flow Direction:** Bidirectional - **Standards:** GB, ANSI - **Materials:** WCB + PFA - **Type:** Weir Diaphragm Valve - **Packaging:** Wooden Crate - **Origin:** Wenzhou, China **Additional Specifications:** - **Actuator:** Pneumatic - **Material:** Cast Steel - **Pressure Rating:** Low Pressure - **Application:** Flow Control - **Size Range:** DN15 ~ 300 - **Operator:** Pneumatic - **Brand:** YFM - **Certifications:** TS, CE, SGS - **HS Code:** 8481804090 **Technical Details:** - **Design & Manufacturing:** ASME B16.34 - **End-to-End Dimensions:** HG/T3704 - **Flange Standard:** ASME/ANSI 16.5 - **Inspection & Testing:** API 598 **Product Specifications:** - **Body Material:** A216/WCB, A351/CF8, A351/CF8M, A351/CF3, A351/CF3M, LCB, A536 - **Disc Material:** A216/WCB, A351/CF8, A351/CF8M, A351/CF3, A351/CF3M - **Diaphragm Material:** EPDM + PFA, FEP - **Lining Material:** PTFE, FEP, PFA, PO - **Nominal Diameter:** NPS 1/2 - 16 - **Pressure Range:** 150lb, 300lb, JIS, DIN - **Connection Type:** Flanged - **Operation Method:** Manual, Worm Gear, Electric, Pneumatic, Hydraulic **Product Description:** The Youfumi lined diaphragm valve is an ideal solution for handling corrosive media in various industrial applications. It features a heavy-duty construction, easy maintenance, and quick on-site component replacement. The valve ensures accurate and flexible operation, with reliable sealing performance even under harsh conditions. It can withstand a wide range of corrosive substances, including molten alkali metals and fluorine elements, making it suitable for use in chlor-alkali, organic chemicals, metal processing, mining, fertilizer production, oil refining, and pharmaceutical industries. However, it is not recommended for use with media containing hard particles, as this may damage the diaphragm and cause leakage. The working temperature must also stay within the specified limits to ensure optimal performance. Frequent opening and closing of the diaphragm may affect its sealing ability over time. The lining material options include PFA, FEP, and GXPO, while the operation methods include manual, worm gear, electric, pneumatic, and hydraulic actuators. Youfumi valves are available in custom sizes and materials to meet specific application requirements. **Material Specification:** - Lock Screw: A320 B8 - Body Bolt: A320 B8 - Handwheel: A216 WCB; A351 CF8 - Sleeve: SS304 - Bonnet: A216 WCB; A351 CF8; A351 CF8M - Stem Nut: Brass - Stem: 2Cr13; A182 304; A182 316 - Adjustable Pad: SS304 - Disc: A216 WCB; A351 CF8; A351 CF8M - Rubber Diaphragm: EPDM - Diaphragm: PFA; FEP - Body: A216 WCB + Lining; A351 CF8 + Lining; A351 CF8M + Lining - Nut: A194 2H; A194 8; A194 8M - Flat Washer: 45#; A182 304; A185 316 - Outer Hex Screw: A197 B7; A320 B8; A193 B8M [Image 1] [Image 2]

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Suzhou Chenran Precision Fasteners Co., Ltd. , https://www.chenranfastener.com

August 23, 2025