ChemValve Metal Body Fluoropolymer Lined Butterfly Valves – CST Series
Type CST fluoropolymer lined butterfly valves are manufactured by ChemValve-Schmid AG in Switzerland. They feature a fluoropolymer disc covering and seat materials with properties superior to those of standard PTFE. This along with a proven effective stem seal provides these valves with superior performance vs. conventional PTFE lined valves.
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Size:1-1/2" to 42"
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Body Type :Wafer, Lug
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Body:Epoxy-coated Ductile Iron
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Disc:PFA Covered 316 SS, Conductive PFA Stainless Steel, Polished Stainless Steel Titanium Grade 2, Hastelloy C22
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Seat Backups:FDA Grade FKM (Viton®), Silicone, EPDM
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Seat & Shaft Seal:PFA covered 316 SS, PTFE, FDA Approved PTFE, UHMPE
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Temperature:-40°C to 200°C (-40°F to 395°F)
Features & Benefits
- Exceptional Corrosion Resistance
- Zero Leakage rated for sizes up to 24” at 150 psi up to 105 Degrees C (220 Degrees F)
- Special TFM Seat and PFA Disc Covering
The seat is TFM, a high density grade of PTFE. The one piece disc/shaft is 316 SS over-moulded with PFA. Both materials have mechanical properties superior to those of standard PTFE:
Low Cold Flow: More durable and stable when under stress
Low Permeability: The permeability of TFM is 50% less than standard PTFE. Lower permeability means longer valve life on highly corrosive chemicals.
Smoother Surface: Higher abrasion resistance - Easily Serviceable
The “split” body can be disassembled and the seat (liner) or disc/shaft part replaced.
Commonly used in these markets
Environmental
Process Industrial
Chemical, Storage & Transport
High Purity Water
Valve Specification Guide
Engineering specifications are crucial as they provide precision, clarity, quality assurance and compliance in your projects. Download to save you time and assure accuracy in your specifications.
Chemical Resistance Guide
Corrosion resistance is an important factor in selecting the right material of construction for valves, pipe, tubing, fittings and more. Designed to easily navigate, this guide can be downloaded for easy reference.
Materials of Construction
Understanding materials of construction is essential to the accurate selection of valves, pipe, tubing, fittings and more. Designed to easily navigate, this guide can be downloaded for easy reference.
