SWB — double expanding gate valve, 2–24″, ASME 150–1500 / API 6A up to 15000
SWB gate valves are shut-off valves with a double expanding gate: a one-piece body with a single bolted bonnet, two segmented gates, floating seats and a rising stem.
- Model
- SWB
- DN
- 2–24″; API 6A 1 13/16–11″
- Pressure
- ASME 150–1500; API 6A 2000–15000 psi
- Temperature
- −29…+120 °C
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
SWB gate valves are shut-off valves with a double expanding gate: a one-piece body with a single bolted bonnet, two segmented gates, floating seats and a rising stem. At the end of travel the gate segments are spread by a wedge mechanism and pressed simultaneously against the inlet and outlet seats, providing a mechanical seal that does not depend on the pressure differential, and double block with the possibility of checking tightness through the cavity drain.
Design is carried out to API 6D, API 6A and ASME B16.34. The range is from 2 to 24 inches to ASME classes 150–1500 and from 1 13/16 to 11 inches to API 6A at pressures of 2000–15000 psi. Operating temperatures are from −29 to +120 °C, which corresponds to the conditions of trunk gas pipelines, metering stations and underground gas storage. The face-to-face length is per API 6D, API 6A or the manufacturer's standard. The gate valve is bidirectional; the standard seat arrangement is double piston effect (DPE×DPE).
The stem has a double seal and a backseat, which allows the gland packing to be replaced under pressure. An anti-static device and a fire-safe design are provided. Seat inserts are nylon/Devlon V, PEEK or metal with a coating of tungsten carbide or chromium at least 0.15 mm thick; seals are BX metal gaskets, stainless steel spiral wound with graphite, cup seals, chevron V-packing and O-rings. Fasteners are ASTM A193 B7/B7M/B16, A320 L7/L7M, B8/B8M, duplex, super duplex and A453 Gr.660.
Soft seats are standard and metal seats are on request; an extended bonnet, welded end connections and overlay of sealing and wetted surfaces are also available on request. The bore is full or reduced. Connections: ASME B16.5 flanges and 6B/6BX per API 6A, butt-weld ends (ASME B16.25), hub, and compact flanges per ISO 27509.
Gate valves with a double expanding gate are traditionally used where guaranteed, verifiable tightness is important: at commercial metering stations, on bypass and isolation points of trunk gas pipelines, at underground gas storage, in tank manifolds and at terminals. The manufacturer offers this design also in a subsea version to API 6DSS/17D.
Technical specifications
| Model | SWB |
|---|---|
| DN | 2–24″; API 6A 1 13/16–11″ |
| Pressure | ASME 150–1500; API 6A 2000–15000 psi |
| Temperature | −29…+120 °C |
| Design | one-piece body with bolted bonnet, two segmented gates, floating seats, rising stem |
| Standards | API 6D, API 6A, ASME B16.34 |
| Seats | DPE×DPE standard; inserts nylon/Devlon V, PEEK or metal with TC/CrC ≥0.15 mm |
| Seals | BX gasket, stainless steel + graphite, cup seals, chevron packing, rings |
| Features | bidirectional, double stem seal / backseat, anti-static, Fire Safe |
| Connections | ASME B16.5 flanges, 6B/6BX; BW; hub; ISO 27509 |
Request a price and lead time
SWB — double expanding gate valve, 2–24″, ASME 150–1500 / API 6A up to 15000. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
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