W68/W88 control valves for flow, pressure, and level regulation.
W68 and W88 throttling valves use a tapered stem-seat design to meter flow as the valve opens or closes. Positioner-equipped configurations support controlled sanitary-process duty, including aseptic stem-flush and divert requirements.
Precise control in a sanitary seat-valve platform.
Body, actuator, stem, seal, and positioner choices allow the platform to be configured around the application rather than forcing one valve arrangement into every duty.
Throttling and regulating
For controlled flow, pressure, or level duty in sanitary process systems.
Aseptic stem flush
Adds an aseptic stem-flush configuration for hygienic control applications.
Divert and non-slamming duty
Divert-throttling and non-slamming divert configurations support more complex flow paths.
Configurable around the process.
Confirm body arrangement, required Cv, seal style, pressure, actuator, positioner, and control signal before final selection.
Valve construction
- 316L bodies machined from solid bar with laser-welded ports
- Low- and high-flow Cv stem options
- Standard S-clamps connecting adapters and bodies
- Open-yoke 3-A design
Seat and control options
- Tef-Flow, Tef-Flow P, Tri-Ring, and metal-plug seal options
- FKM standard elastomer with EPDM option
- Positioner configurations for pneumatic or 4-20 mA control architectures
- High-pressure capability; confirm the required rating for the selected configuration
Published platform details.
These values summarize the existing W68/W88 product information. Verify final materials, finish, size, and pressure capability for the exact valve configuration.
| Item | Published detail |
|---|---|
| Sizes | 1-6 in. OD (25-152 mm) |
| Product-wetted material | ASTM 316L (UNS S31603); DIN 1.4404 |
| Non-product material | ASTM 304 (UNS S30400); DIN 1.4301 |
| Seat options | Metal or Tri-Ring |
| Elastomers | FKM standard; EPDM optional |
| Finish | <32 Ra (<0.8 µm); other finishes available on request |
Match the positioner to the control signal.
Pneumatic positioners use a 3-15 psi control signal and air supply. Electropneumatic configurations use a 4-20 mA signal with valve-position feedback to add or vent actuator air.
3-15 psi control
Use the pneumatic control signal and air supply to drive the seat plug to the required position.
4-20 mA control
Use electronic position feedback and pneumatic actuation for modulating control.
Datasheets, manuals, and valve-selection references.
Use the SPX FLOW valve key for family-level comparison, then confirm the final model, body, stem, seat, actuator, and positioner with Triplex.
Keep comparing inside the seat-valve family.
Need a W68 or W88 valve sized, quoted, or identified?
Send the valve tag, size, body arrangement, process conditions, required Cv, positioner signal, actuator and control-top details.
Talk to Triplex
