China DI PN10/16 class150 Long Stem Soft Sealing Gate Valve Manufacturers, Factories
Product Description
Product Overview & Key Characteristics
The extension stem gate valve is engineered for the convenience of operators to effortlessly control underground or well-bottom valves directly from ground level. Equipped with an extended stem mechanism that operates smoothly, this resilient seated gate valve features a specialized rubber elastically fully-encapsulated wedge structure, eliminating gate leakage and rust concerns commonly associated with conventional valves.
Technical Specifications & Material Standards
| Size, Pressure Rating & Standards | |
|---|---|
| Size | DN40 - DN1200 |
| Pressure Rating | PN10, PN16, CL150 |
| Face to Face STD | BS5163, DIN3202 F4, API609 |
| Connection STD | BS 4504 PN6/PN10/PN16, DIN2501 PN6/PN10/PN16, ISO 7005 PN6/PN10/PN16, JIS 5K/10K/16K, ASME B16.1 125LB, ASME B16.1 150LB, AS 2129 Table D and E |
| Upper Flange STD | ISO 5211 |
| Applicable Medium | Water, Waste Water, Air |
| Working Temperature | -20℃ to 120℃ |
| Material Construction | |
| Body | Cast Iron (GG25), Ductile Iron (GGG40/50) |
| Disc | Cast Iron (GG25), Ductile Iron (GGG40/50) |
| Stem / Shaft | Stainless Steel 304 (SS304 / SS316 / SS410 / SS420) |
| Seat | CF8 / CF8M + EPDM (Resilient Seated) |
| Bushing | PTFE, Bronze |
| O-Ring | NBR, EPDM, FKM |
| Actuator Options | Gear Box, Electric Actuator, Pneumatic Actuator |
Applications & Manufacturing Solutions
This versatile gate valve serves widely as a reliable regulator and cutoff/shut-off device in various water supply and drainage pipelines. It is extensively utilized across water supply systems, petrochemicals, metallurgy, shipbuilding, food processing, pharmaceuticals, textiles, energy systems, and modern building infrastructure.
Zhongfa Valve provides comprehensive OEM & ODM gate valves and replacement parts manufactured in China. Rooted in the philosophy of delivering high-quality products paired with optimal service at economical prices, every product undergoes two full testing rounds prior to shipping. We warmly welcome clients to visit our manufacturing facilities to inspect our valve craftsmanship firsthand.
Product & Factory Gallery
Frequently Asked Questions (FAQ)
An extension stem gate valve allows field workers to operate valves installed underground or at the bottom of wells straight from the ground level. This significantly improves operational convenience, safety, and efficiency without requiring personnel to enter confined underground spaces.
The valve body and disc are crafted from high-strength Ductile Iron (GGG40/50) or Cast Iron (GG25), with an internal fusion-bonded epoxy coating to prevent corrosion. The wedge is fully encapsulated in premium EPDM rubber (up to 50% rubber content) to provide bubble-tight sealing and prevent rust or gate leakage.
The resilient seated gate valve is designed to handle water, waste water, and air within an operating temperature range of -20℃ to 120℃.
No. The resilient seated gate valve design allows straight-through fluid movement with no flow restriction or directional limits, maintaining stable pressure and avoiding fluid turbulence throughout the line.
Every valve undergoes double testing before release. Inspections include visual appearance, material composition analysis, air tightness verification, hydraulic pressure testing, and shell integrity checks. Unqualified valves are strictly prevented from leaving the factory.
Yes. Zhongfa Valve supports full OEM & ODM manufacturing services. We can configure the valves with manual handwheels, gearboxes, pneumatic actuators, or electric actuators adhering to the ISO 5211 top flange standard.
