ChemValve Fluoropolymer Lined Butterfly Valves – CST-K Series
The ChemValve Type CST-K fluoropolymer lined butterfly valves feature a composite plastic body. These valves are designed for zero leakage in the toughest of corrosive applications up to 130oC (265oF) at 150 psi. The high density TFM liner provides superior performance vs. conventional PTFE lined valves. The one-piece shaft/disc is over-moulded with PFA. The vinyl ester body reinforced with carbon and glass fibres is essentially indestructible and has outstanding external corrosion resistance.

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Size:2" to 12"
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Body Type :Wafer, Lug
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Body:VE-CF Vinyl Ester Carbon Filled
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Disc:PFA Covered 316 SS
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Seat & Shaft Seal:TFM
2" to 12"
Wafer, Lug
VE-CF Vinyl Ester Carbon Filled
PFA Covered 316 SS
TFM
Features & Benefits
- Exceptional Internal and External Corrosion Resistance
- Zero Leakage 150 psi up to 130oC (265oF)
- Composite Body
Carbon and glass reinforced vinyl ester material has excellent mechanical properties:
High Tensile Strength: High pressure rating
High Temperature Rating: 130 Degrees C (266 Degrees F)
High Impact Strength: Durability and safety - 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 - Light Weight
The CST-K valve is lighter than conventional ductile iron body PTFE lined butterfly valves. Installation and maintenance is much easier and stress on the piping system is lower. - 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.