Specialized bellows stop valve for chlorine gas

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Applicable media: chlorine, liquid chlorine. Applicable temperature: -40～150°C. Nominal pressure: PN1.6, 2.5, 4.0 MPa; ANSI 150LB, 300LB; IS 10K, 20K. Nominal diameter: DN 15～300; NPS 1/2"～12". Driving method: manual, pneumatic, electric. Product description: The bellows globe valve designed for chlorine is specifically engineered for use with chlorine, liquid chlorine, and various other highly hazardous media. In addition to the packing, it features a bellows seal as well, resulting in a dual-sealing structure that effectively prevents the leakage of hazardous materials. Structurally, taking into account the actual conditions of valve applications at home and abroad, the seal pair between the valve disc and the valve seat is made of highly corrosion-resistant polytetrafluoroethylene and Stellite cemented carbide, offering stable sealing performance, safe and reliable operation, strong corrosion resistance, no leakage of the medium inside or outside, as well as easy operation. Its key technical specifications such as sealing performance, maintainability, and safety have reached the level of world-renowned products, enabling it to replace imported products. http://www.nttyfm.com/pic/vvv.jpg Structural features: 1. The hydraulically formed bellows provide the first layer of sealing, ensuring zero leakage at the valve stem seal. 2. The multi-stage polytetrafluoroethylene packing in the stuffing box forms a second seal above the bellows, enhancing the reliability of the sealing. 3. The middle flange features a groove sealing structure, which ensures reliable sealing of the middle flange even in the presence of fluctuations in pipeline pressure. 4. The sealing pair pairing structure adopts cone or planar types, enabling automatic sealing compensation and thus providing dual protection; it features stable sealing performance, no adhesive wear, and a long service life. http://www.nttyfm.com/pic/0000.jpg Special bellows for chlorine – Basic models: Manual type LJ:WJ41F; Electric type LJ:WJ91F; Pneumatic type LJ:WJ641F; Adjustable type LJ:WLJ(6)41F. http://www.nttyfm.com/pic/vvvv.jpg Materials of key components: Serial number, Component name, Material: 1. Valve body – Nickel-containing high-silicon corrosion-resistant steel; 2. Valve cover – Nickel-containing high-silicon corrosion-resistant steel; 3. Valve stem – Chromium stainless steel; 4. Valve disc sealing surface – Plasma spray-welded or cladded with corrosion-resistant alloy; 5. Seat sealing surface – Compression-molded, integrally sintered polytetrafluoroethylene; 6. Packing – Polytetrafluoroethylene; 7. Gasket – Polytetrafluoroethylene; 8. Bellows – C-276. Product features: 1. Depending on the specific properties of the medium, this special bellows-type stop valve uses corrosion-resistant alloys for its valve body, making it resistant to chlorine and liquid chlorine corrosion; it can operate at temperatures as low as -40°C, thus meeting the requirements of various operating conditions. 2. The hydraulically formed bellows provide the first layer of sealing, ensuring zero leakage at the valve stem. 3. Multiple layers of polytetrafluoroethylene packing in the stuffing box, placed above the bellows, form a second layer of sealing, enhancing reliability. 4. The middle flange features a mortise-and-tenon sealing structure, which ensures reliable sealing even when there are fluctuations in pipeline pressure. 5. The non-rotating valve stem prevents the bellows from twisting, thereby extending the valve’s service life. 6. The sealing pair uses a conical or planar design, allowing for automatic sealing compensation; this provides dual protection, resulting in stable sealing performance, no adhesive wear, and a long service life. Notes: Key technical specifications for the bellows used in these valves: 1. Application range – These products are used in bellows-type stop valves, bellows-type gate valves, bellows-type control valves, etc. 2. Nominal diameter: DN15–DN250. 3. Nominal pressure: PN1.6, PN2.5, PN4.0, PN6.4, PN14.0. The bellows are designed to withstand external pressure; the design pressure rating is 1.5 times the nominal pressure. 4. Operating temperature: –196°C to 300°C. 5. Stroke: The total displacement (compression) of the bellows is greater than the minimum stroke required for the valve to open. 6. Service life: More than 10,000 cycles at the nominal pressure and stroke conditions. The bellows undergo high-temperature and high-pressure fatigue tests, stiffness checks, and are welded using precision automatic ring welders to ensure uniformity in their structure.