Weir-Style Diaphragm Valves—DW Series
The Swagelok® DW series of weir-style diaphragm valves is designed and manufactured to meet or exceed the stringent requirements of industry standards. In addition to forged-body shutoff valves, block-body tee patterns, close-coupled branches, and point-of-use (viking) valves are available.

Specifications Working Pressure Temperature Flow Coefficients Diaphragm Material Body Material Optimum Drain Angles Internal Surface Finish Valve Sizes End Connections

Up to 145 psig (10.0 bar) Up to 302°F (150°C) 0.3 to 214 EPDM or EPDM-backed PTFE Forged or wrought AISI 316L 15° to 37° BPE-SFV1 through BPE-SFV6 1/4 to 4 in. Kwik-Clamp, TS series sanitary clamp, and tube butt weld ends

More Information
Download the Weir-Style Diaphragm Valves—DW Series catalog.
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Features

• Valve Bodies
  • Integral Kwik-Clamp and tube butt weld connections eliminate body welds and allow maximum cutback to facilitate orbital welding.
  • Broad weir profile reduces diaphragm deformation.
  • ASME-BPE–compliant sulfur content improves weldability.
  • Comprehensive markings in accordance with ASME-BPE.
• Diaphragms
  • Molded, normally open position, reinforced for strength and pressure containment.
  • USP 23 Class VI and 21 CFR 177-compliant.
• Third-Party Manual Actuators
  • Stainless steel housing and sanitary internal components for corrosion resistance.
  • Autoclavable, can withstand washdown.
  • Temperature-insulating POM-C or stainless steel materials.
  • Visual indicator standard.
• Third-Party Pneumatic Actuators
  • Withstand temperatures up to 302°F (150°C).
  • Autoclavable, can withstand washdown
  • Normally closed, normally open, and double-acting actuation modes available; actuation mode can be changed with the valve inline.
  • Stainless steel, molded PPS, or molded polypropylene housing.
  • Visual indicator standard

Testing
Every Swagelok DW series weir-style diaphragm valve is hydrostatically tested to 1.2 times its rated pressure and visually examined for leakage. Every Swagelok DW series valve is inboard helium leak tested to a maximum allowable leak rate of 2.5 × 10^–3 std cm³/s, at the seat, envelope, and port welds, using FCI 70-2 as a guideline.

Cleaning and Packaging
All Swagelok DW series valves are cleaned and packaged in accordance with Swagelok Standard Cleaning and Packaging (SC-10).

Inspection
Third-party inspection to ASME-BPE guidelines is available.

Options

• Third-party limit switches, solenoids, positioners, and stroke limiters with manual override are available.