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W68 / W88 / W98 Series - Throttling/Regulating Single Seat Valves
Throttling or regulating valves are designed for flow and pressure control applications. Fluid flows against the tapered curve of the valve seat allowing a calculated amount of flow through as it opens and closes. The throttling valve is typically equipped with a positioner. Throttling valves are used for flow control, pressure control, filler level control, and modulated filling. Delivering Single Seat Valves Faster Than Ever Don't let a valve shortage halt your progress. Our new Quick Ship Delivery Program in the US allows you to receive new or replacement WCB Single Seat W60 valves including W61 shut-off, W62 divert and W68 throttling valves, in five working days or less*. *Conditions apply click here to learn more and find out how we can help you keep your production running smoothly.
Product Specifications
Sizes: 1" - 6" Tube O.D. (25 mm - 152 mm) Materials Product Wetted: ASTM 316L (UNS-S31603); (DIN-1.4404) Non-Product: ASTM 304 (UNS-S30400); (DIN-1.4301) Seat Material:
- Metal
- Tri-Ring
Elastomers:
- FKM (Standard)
- EPDM (Option)
Finish: < 32Ra (<0.8 µm) Other finishes available upon request
Model Types
- W68 Series – Throttling
- W88 Series – Aseptic Stem Flush Throttling
- W682 or W882 Series – Divert Throttling
- W685 or W885 Series – Non-Slamming Divert Throttling
Configurations Pneumatic Moore positioners - Uses 3-15 psi (.20-1.03 bar) pneumatic control signal and plant air supply to drive the seat plug into a certain position.
- Direct acting (as input increases, supply air increase)
- Reverse acting (as input increases, supply air decreases)
- Cost effective way to control the valve
Electropneumatic Bürkert positioners - Uses a 4-20mA electronic feedback signal between the valve stem sensor and a solenoid in the control top which adds or vents air into the actuator to move the plug seat up or down depending on the desired position.
- Positioner attaches right to the valve
- Includes all of the controlling functions within the unit
- Long service life
- Also available with bus communication (DeviceNet, Profibus) and additional control options