Bellows gate valves that Topper provides have the following features:

1. Structure and components of bellows gate valves are similar to common gate valves except that their valve stem seal structure is unique.

2. When a bellows gate valve is open, the bellows is compressed, the adverse sealing pair of valve stem and valve cover limits stroke of valve stem to prevent that deformation of bellows exceeds its own limits and causes damage.

3. The valve stem of a bellows gate valve adopts double seal structure of bellows and stuffing to guarantee no leakage sealing at valve stem.

4. The valve is particularly applicable to industrial pipeline for flammable, explosive, toxic, strong penetrability, nuclear radiation, nuclear power project and ship confined space and other special medium and severe conditions.

Product Details:

Design standard: API 600, API 602, API 603.

Length of structure: ASME B16.10.

Flange connecting end: ASME B16.5.

Butt welding connecting end: ASME B16.25.

Wall thickness: API 600, ASME B16.34.

Inspection and test: API 598.

Pressure and temperature rating: ASME B16.34.

Product scope: NPS 1/2 Inch - NPS 24 Inch, CL150 - CL600.

Main body material: ASTM A216 WCB, ASTM A352 LCB, ASTM A216 WCC, ASTM A217 WC6, ASTM A217 WC9, ASTM A351 CF8, ASTM A351 CF8M, ASTM A351 CF3, ASTM A351 CF3M, ASTM A890 4A, ASTM A105, ASTM A350 LF2, ASTM A182 F11, ASTM A182 F22, ASTM A182 F51, ASTM A182 F91, ASTM A182 F304, ASTM A182 F316, ASTM A182 F304L, ASTM A182 F316L, etc.

Drive device: handle, bevel gear, electric, pneumatic, etc.