**Performance Parameters and Application of the Bellows Shut-off Valve**
The bellows shut-off valve is designed for use in medium-pressure systems ranging from PN1.6 to 4.0 MPa, with operating temperatures between -29°C and 350°C. It is ideal for handling hazardous media such as flammable, explosive, highly toxic, and toxic fluids, as well as high-temperature heat transfer oils and liquid ammonia. This type of valve is widely applied in industries like petrochemicals, chemical fiber textiles, plastics, papermaking, electric steel, printing and dyeing, rubber, and natural gas systems. Its reliable performance makes it suitable for pipelines carrying various industrial fluids, including ethylene glycol, where it can be used to either cut off or connect the flow of media. It is also applicable for water, oil, steam, and natural gas.
**Key Features of the Bellows Shut-off Valve:**
1. The valve features a double-layer bellows system that ensures a secure seal around the stem, minimizing leakage risks.
2. The design is both functional and aesthetically pleasing, with a reasonable structure and a reliable sealing mechanism.
3. The valve disc and seat are made using iron-based alloys or cobalt-based stellite hard alloys, depending on the application requirements. This provides excellent resistance to wear, high temperature, corrosion, and scratching, ensuring long service life.
4. The stem undergoes quenching and tempering, along with surface treatment, to enhance its corrosion resistance, scratch resistance, and durability.
5. The valve supports various flange standards and sealing methods, making it adaptable to different engineering needs and user preferences.
6. The valve body material is available in a wide range, with packing and gaskets selected based on actual working conditions or customer specifications. This allows the valve to function effectively under diverse pressure, temperature, and media conditions.
**Technical Specifications:**
- **Valve Material:** Cast steel, stainless steel, forged steel, forged stainless steel.
- **Working Pressure:** GB standard: 1.6–4.0 MPa; American standard: 150LB–600LB.
- **Working Temperature:** -20°C to 350°C.
- **Valve Diameter:** 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:** Machinery, chemical equipment, general parts, industrial equipment, water supply and drainage systems, papermaking, pharmaceuticals, petrochemicals, electrical systems, metallurgical powder processing, mining, municipal infrastructure, electronics, and more.
**Our Services and Commitments:**
All our products are rigorously tested and fully comply with national standards. We can also produce according to American or other international standards upon request. Our business philosophy centers on "customer focus, quality as life, technological innovation, and sustainable development." Every product is manufactured following strict quality management systems to ensure top-quality performance and exceptional service.
We operate on the principle of "integrity-based" values, delivering professional services and high-quality products to our clients. In addition to supplying standard products, we offer customized solutions for non-standard applications. Our warranty period is 18 months, during which we provide free after-sales support, including spare parts and on-site maintenance.
For inquiries, orders, or further information, please contact us at:
**Sales Hotline:** 51079089
**Fax:** [Not provided]
**24-Hour Service Number:** 18917502865
**Online QQ:** 377970930
**Email:** [Not provided]
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