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W68 / W88 Series - Throttling/Regulating Single Seat Valves

Product Type:
Valves / Regulating 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.

Features

A modular family of "throttling or pressure control" valves that are the ultimate in: easy cleaning, high pressure, low maintenance design. With 11 standard bodies, 12 different actuators, 4 stem types, flush or standard adapter, and a wide range of control tops, the valves can be configured to precisely fit any application.

  • Bodies machined from solid bar 316L with laser welded ports
  • Stems available with low and high flow Cv values
  • Seat ring inserts for very low Cv in 1" and 1½" (25mm and 38mm) bodies
  • Standard "S" clamps used to connect adaptors and bodies
  • Adaptor and lower bearing carrier with inlet and discharge flush connections
  • High pressure capability
  • Seal options – Tri-Ring (FKM or EPDM for complete shut-off) or Metal Plug
  • Open yoke 3-A design
  • Reverse (R) or standard plug design
  • Pneumatic and electropneumatic positioners available
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

Options

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
Videos
W68 Series Single Seat Valve Operation - Open and Closed Seat Positions
Sanitary Control Valve Maintenance Burkert Positioner
Drawings & Models
Single Seat Valve Actuators, Control Tops, Adapters - STEP & IGS
Single Seat Valve Actuators, Control Tops, Adapters STEP
zip
Single Seat Valve Actuators, Control Tops, Adapters IGS
zip
Single Seat Valve Upper Bodies - STEP & IGS
Single Seat Valve Upper Bodies STEP
zip
Single Seat Valve Upper Bodies IGS
zip
Single Seat Valve Lower Bodies - STEP & IGS
Single Seat Valve Lower Bodies STEP
zip
Single Seat Valve Lower Bodies IGS
zip
Downloads
Datasheets
DS-1201 W60 Series Shut-off and Divert Single Seat Valves US
DS-1202 W80 Series Aseptic Stem Flush Valves US
DS-1207 W68/W88/W98 Series Control Valves US
VK-1000 - Single Seat, Double Seat and Ball Valve Key US
Flyers
FH-1903 - Electropneumatic Positioner Upgrade US
FB-0050 - Construction - Mix Proof & Single Seat Valves - Product Features US
FB-0051 - Materials - Mix Proof & Single Seat Valves - Product Features US
FB-0084 - Single Seat Valve Actuators - Product Features US
Manuals
95-03043 - W68 and W88 Series Throttling/Pressure Control Valves US
95-03083 - Control Tops for Waukesha Cherry-Burrell Valves and Switch-Only Options US
H326406 - APV CU4 As-interface Control Unit GB
H323871 - APV CU4 Direct Connect Control Unit GB