Lined valve

Lined valve

The Lined valve is a one-piece valve body and has pure-modified(reinforced) PTFE trim parts, push-down-to-close action, and positive shutoff. With sophisticated PTFE replaced the previously used glass-filled or carbon-filled standard PTFE trim without any loss of mechanical or thermal properties and having improved the universal chemical resistance, it has excellent performance. This valve is maily applied to involving severely corrosive and toxic flowing media and is well-suited for pure mediaapplications, as well. And the RSS valve body may also be applied to most media within its temperature and pressure limitations, which offers an economical alternative to alloy valve bodies in a wide variety of applications.

There are some features about it:(1)fluid compatibility—the pfa perfluoroalkoxy resin)-lined assembly provides corrosion protection by shielding metal parts from the process media, making it ideal for controlling of severely corrosive media; (2)permeating service—a heavy duty ptfe bellows with stainless steel support rings is standard or all services in the nps 1 to 4 valve sizes.compared to a standard bellows, the heavy dutybellows design has an enhanced resistance to permeation. this is due to a wall thickness of 2.5mm (0.1 inch) and pressure retaining rings inside the bellows. this bellows features a modified ptfe; material (tfm 1705) which provides additional permeation protection over the original heavy duty ptfe bellows; (3)economy—because all metal parts are shielded from the process fluid, the use of expensive alloys is not necessary; (4)easy in-line maintenance—the top entry design eases in-line maintenance. this design also minimizes the transfer of pipeline stress, which minimizes leakage both at the valve body joint and seat ring; (5)long life bellows seal—the ptfe bellows seal is leak tight and, with proper use and can have an expected life cycle exceeding 500,000 full stroke cycles.