**Performance Parameters and Application of Bellows Shut-off Valve**
The bellows shut-off valve is designed for use in medium pressure environments ranging from PN1.6 to 4.0MPa, with operating temperatures between -29°C and 350°C. It is ideal for handling flammable, explosive, highly toxic, or hazardous fluids, as well as high-temperature heat transfer oils, liquid ammonia, and other similar media. This type of valve is widely applied in various industries such as petrochemicals, chemical fiber textiles, plastics, papermaking, electric steel, printing and dyeing, rubber, and natural gas systems. Its reliable performance makes it a popular choice for pipelines transporting industrial fluids like ethylene glycol, enabling efficient control of fluid flow in different piping systems.
**Key Features of the Bellows Shut-off Valve:**
1. The valve features a double-layer bellows design that ensures a secure seal on the stem, enhancing its safety and durability.
2. The structure is well-designed, offering a reliable seal, excellent performance, and an aesthetically pleasing appearance.
3. The valve disc, seat, and sealing surfaces are made using iron-based alloy surfacing or stellite cobalt-based hard alloy surfacing, depending on specific requirements. These materials provide outstanding resistance to wear, high temperatures, corrosion, and scratching, ensuring long-term service life.
4. The stem undergoes quenching, tempering, and surface treatment, providing excellent resistance to corrosion, scratches, and wear.
5. The valve body is available in a variety of materials, and the packing and gasket materials are selected based on actual working conditions or customer preferences. This allows the valve to be used under a wide range of pressure, temperature, and media conditions.
6. The valve can be operated manually, via gear, electrically, or pneumatically, making it adaptable to different applications.
**Technical Specifications:**
- **Valve Material:** Cast steel, stainless steel, forged steel, forged stainless steel.
- **Working Pressure:** GB standard: 1.6–4.0MPa; American standard: 150LB–600LB.
- **Operating Temperature:** -20°C to 350°C.
- **Valve Size:** DN15 to DN300.
- **Connection Type:** Flange, threaded, or welded.
- **Drive Mode:** Manual, worm gear, pneumatic, or electric.
- **Applicable Media:** Water, oil, gas, steam, and other similar fluids.
**Application Areas:**
This valve is commonly used in mechanical equipment, chemical processing, general machinery, industrial systems, water supply and drainage, papermaking, pharmaceuticals, petrochemicals, electrical systems, metallurgy, mining, municipal infrastructure, electronics, and more.
**Our Services and Commitments:**
All our products are rigorously tested and fully comply with national standards. We also offer customization according to American or other international standards. Our business philosophy centers on "customer focus, quality as life, and technological innovation." We ensure strict adherence to quality management systems, delivering reliable products and top-notch service.
We believe in integrity and strive to provide professional support through high-quality products. In addition to supplying standard valves, we also offer custom solutions for non-standard applications. Our warranty period is 18 months, and we provide free after-sales services such as spare parts and on-site maintenance during this time.
For any inquiries or orders, please feel free to contact us.
**Sales Hotline:** 51079089
**Fax:** [Not provided]
**24-Hour Service Number:** 18917502865
**Online QQ:** 377970930
**Email:** [Not provided]
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