Fisher RSS Lined Globe Valve
The Fisher RSS lined globe-style valve is a one-piece valve body which has pure-modified (reinforced) PTFE trim parts, push-down-to-close action, and positive shutoff.
Features include
- Fluid Compatibility – The PFA (perfluoroalkoxy resin)-lined assembly provides corrosion protection by shielding metal parts from the process media, making it ideal for controlling severely corrosive media.
- Permeating Service – A heavy duty PTFE bellows with stainless steel support rings is standard for all services in the NPS 1 to 4 valve sizes. Compared to a standard bellows, the heavy duty bellows 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 which provides additional permeation protection over the original heavy duty PTFE bellows.
- Economy – Because all metal parts are shielded from the process fluid, the use of expensive alloys is not necessary.
- Liner Integrity – Lining thickness is a minimum of 5 millimeters at all areas where the valve is exposed to process flow. Transfer molding techniques provide for excellent consistency, density, and low permeability. Transfer molded PFAmaterial is translucent. This allows for checking of the entire wall surface for pin holes and cracks in the material during the manufacturing process.
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