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Keystone Figure Butterfly Valve, 129/239

Figure 129/239 Butterfly Valve

Brand: Keystone
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Heavy duty lugged/wafer valve with steel reinforced cartridge design seat.
Features
  • Replaceable, metal-reinforced seat, completely encapsulated by rubber, isolates the stem and body from the media and eliminates seat distortion due to high vacuum or turbulence.
  • Primary stem seal, formed by preloaded contact of disc hub with flatted seat surfaces, completely isolates stem and body from the line media.
  • Secondary stem seal, formed by an engineered interference fit of the stem through the seat, provides additional sealing integrity.
  • Rounded, polished disc edge provides full 360 degree concentric seating, minimum flow restriction, lower seating and unseating torques and maximum seat life.
  • Superior, one-piece thru-shaft design provides high-strength and positive disc control. Shaft ends are standardized for operator interchangeability.
  • Self-locking disc screws allow quick and easy disassembly and provide a positive connection.
  • Self-adjusting, bi-directional stem seal is suitable for full industrial vacuum and pressure, preventing external contamination of the stem area.
  • Heavy-duty, corrosion-resistant top bushing absorbs actuator side thrust loads.
  • Each valve is factory tested to 110 percent of specified pressure rating assures drop-tight shut-off.
  • Cast-in top plate is an integral part of the body and is standardized to allow direct mounting of all Keystone actuators.

Specifications

Brand

Applications

  • Marine Docks, Vacuum Systems

Approvals & Certifications

  • American Bureau of Shipping Shipboard, ABS

End Connection

  • Lugged, Wafer

Material

  • Aluminum Bronze, Buna-N, 316L Stainless Steel, 316 Stainless Steel, Carbon Steel, Cast Iron, EPDM Rubber, Monel, Stainless Steel, Ductile Iron

Media

  • Air, Vacuum, Water

Operating Temperature

  • Standard Temperature (-40° - 250° F)

Pressure Class

  • ASME

Seat / Seal Type

  • Resilient

Shutoff Class

  • Zero Leakage

Standards

  • API 609, ASME B16.34

Valve Size

  • NPS 18 / DN 450, NPS 6 / DN 150, NPS 4 / DN 100, NPS 3 / DN 80, NPS 2-1/2 / DN 65, NPS 20 / DN 500, NPS 16 / DN 400, NPS 8 / DN 200, NPS 14 / DN 350, NPS 12 / DN 300, NPS 10 / DN 250

Valve Size Standard

  • NPS, DN

Valve Type

  • Butterfly

  • Marine Docks
  • Vacuum Systems

Documentation

Data Sheets

Product Manuals

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