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Home > Products > Valve > Flanged Non-Rising Stem Soft Sealing Gate Valve

Flanged Non-Rising Stem Soft Sealing Gate Valve

**British Standard:**
- Size Range: 2"–24" (DN50–DN600)
- Design Standards: BS5163-1, BS5163-2, EN 558-1
- Connection Standard: EN 1092-2
- Working Pressure: PN10, PN16, PN25

**American Standard:**
- Size Range: 2"–24" (DN50–DN600)
- Design Standards: AWWA C515, ASME B16.10
- Connection Standards: ASME B16.1 (CL125), ASME B16.42 (CL150)
- Working Pressure: 363PSI, 300PSI, 250PSI, 200PSI

**German Standard:**
- Size Range: 1½"–24" (DN40–DN600)
- Design Standards: BS5163-1, BS5163-2, EN 558-1 (Face-to-Face Dimensions, Series 3)
- Connection Standards: BS EN 1092-2, BS 10 Table D/E
- Working Pressure: PN10, PN16, PN25

**Chinese National Standard:**
- Size Range: DN50–DN1000
- Design Standards: CJ/T 216, GB/T 12221, GB 5135.6
- Connection Standard: GB/T 17241.6
- Working Pressure: PN10, PN16, PN25

**Application Scope:** Fire protection, water utilities.

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Product description

This valve is primarily used to connect and cut off the medium in pipelines. The valve stem rotates, and its transmission thread is inside the body cavity, which saves installation space. The entire gate is coated with rubber. The elastic deformation of the rubber enables the valve to fit tightly when closed, achieving excellent sealing performance and thus zero leakage. There are no gate grooves in the valve cavity, so no debris is retained, resulting in extremely low fluid resistance and lighter switching operations.

Customer challenge

Gate valves have high opening and closing torque.

Bolts are prone to rusting.

The upper seal and middle flange of the gate valve are prone to external leakage.

The gate of the gate valve is prone to internal leakage.

Product function

Low operating torque function

Rust prevention function

Anti-external leakage function

Anti-internal leakage function

The valve can be easily closed with a torque equal to 80% of the nominal diameter, achieving zero leakage under nominal pressure.

The bonnet and gland adopt a countersunk wax-sealed design, with no exposed bolts, completely solving the problem of bolt rusting.

The upper seal adopts a three O-ring design to ensure no water leakage during the dynamic movement of the valve stem; the middle flange features a self-sealing design, where the gasket utilizes the O-ring principle. The greater the pressure in the valve chamber, the tighter the rubber is squeezed, resulting in a more reliable seal.

The gate adopts an advanced dual-mold injection molding and high-temperature vulcanization process. The rubber surface of the gate has no exposed positioning points, with 100% full coverage, uniform rubber, stable dimensions, and excellent sealing performance.

Value advantage

Energy saving and environmental protection

The surface treatment adopts non-toxic epoxy resin powder, which is sprayed by an automatic plastic spraying line to ensure the thickness, continuity and uniformity of the plastic coating.
Excellent material quality

All ductile iron castings are independently cast using domestically leading wire-feeding nodulization technology, with a nodularity rate of over 90%, and quality requirements exceeding national standards.
Low flow loss

Full passage design results in low flow loss, energy saving and consumption reduction.
Low torque

Under the rated working pressure, the opening and closing torque is no higher than 80% of the requirements of national standards.
Reliable sealing

The gate is produced by an advanced injection molding and vulcanization process, with uniform rubber thickness, no exposure, 100% full coverage, and stable dimensions; the upper seal adopts a design of three O-rings plus one dust-proof ring, ensuring reliable sealing performance.

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