Control Valves Β· Single-Seated Control Valves
Fluorine Lined Single Seat Control Valve
The fluorine lined single seat control valve is the FEP-lined, corrosive-media execution of the single seated control valve line: a WCB or CF8 body lined with FEP around FEP/PTFE plug, seat and bellow components, so the wetted path is fluoropolymer rather than metal. The benchmark execution covers 1/2" to 12" at Class 150/300/600, PN10 to 64 and JIS 10K to 40K, standard -17 C to +230 C, with a multi-spring diaphragm actuator in direct or reverse action.
Part of the Single-Seated Control Valves family
Last updated: 2026-11
Specifications
| size range | 1/2" to 12" |
|---|---|
| pressure class | Class 150/300/600, PN10-64, JIS 10K-40K |
| flow characteristics | Linear, Equal % |
| body materials | WCB, WC6, WC9, CF8, CF8M, Alloy Steel (FEP lined) |
| trim materials | 304(cobalt-chromium hardfacing alloy), 316(cobalt-chromium hardfacing alloy), 316L(cobalt-chromium hardfacing alloy), 420, hard facing |
| operation | Throttling control, On-Off control |
| operation | Multi-spring diaphragm type |
| temperature range | Standard -17 to +230 C |
| valve type | Diaphragm actuator operated globe pneumatic control valve |
| end connection | Flanged, Welded |
| gland packing | V-PTFE, PTFE, Graphite |
| guide type | Top guide |
| valve action | Air to Close, Air to Open |
| actuator size | 220, 270, 350, 470 |
| actuator action | Direct action, Reverse action |
| air supply pressure | 0.14, 0.16, 0.28, 0.4 MPa |
| spring range | 0.02-0.10, 0.08-0.24 MPa |
| air connection | Rc1/4" |
| ambient temperature | -20 to +70 C |
Application & selection guidance
Select this execution where the medium attacks metallic trim - acid, chlorinated and oxidising duties - and a full fluoropolymer wetted path is required at control-loop quality. Confirm the rating class, keep the standard -17 to +230 C window, and match the 0.14 to 0.4 MPa air supply and 0.02-0.10 / 0.08-0.24 MPa spring range to the plant positioner.
Frequently asked questions
What makes this execution suitable for corrosive media?
The benchmark page lists the valve body as WCB or CF8 lined with FEP, with valve plug, seat and bellow in FEP or PTFE and a PTFE bellow - the wetted components are fluoropolymer-faced rather than bare metal.
What ratings and temperatures does the benchmark execution declare?
The benchmark page declares 1/2" to 12" nominal diameter, Class 150/300/600, PN10 to PN64 and JIS 10K to 40K ratings, and a standard temperature window of -17 C to +230 C with a -20 C to +70 C ambient for the actuator.
How is the pneumatic actuator supplied?
The benchmark page lists a multi-spring diaphragm actuator in 220/270/350/470 sizes, direct or reverse action, 0.14/0.16/0.28/0.4 MPa air supply, 0.02-0.10 and 0.08 to 0.24 MPa spring ranges and an Rc1/4" air connection.
Ordering & documentation
Documents
Ask for the documentation set you need with the inquiry β typical items for this execution (material certificates, test reports to the listed inspection standard, dimensional drawings) are confirmed and supplied with the quotation.
Quotation
A quotation-ready inquiry states: nominal size and pressure rating, body and seat material preference, end connection, operation, and the service medium with temperature. Typical values on this page are benchmark reference ranges; the binding values are confirmed at quotation.
Sample & supply
Supply terms, order quantities and lead time are agreed per order β state the destination country and required schedule with the inquiry.
Storage & shipping
Store valves with seats and seals protected from UV, ozone and deformation, keep end-face protectors on until installation, and for elastomer- or PTFE-seated executions avoid prolonged outdoor storage β seat compounds age fastest in direct sunlight and freezing conditions.
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