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Keystone-P-P001183

Keystone Figure 129/239 Butterfly Valve

Product Description

Heavy duty lugged/wafer valve with steel reinforced cartridge design seat

Charakterystyka

  • 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.
Certifications
American Bureau of Shipping Shipboard, ABS
End Connection
Lugged, Wafer
Application
Marine Docks, Vacuum Systems
Material
Aluminum Bronze, Buna-N, 316L Stainless Steel, 316 Stainless Steel, Carbon Steel, Cast Iron, Epdm Rubber, Monel, Stainless Steel, Ductile Iron
Operating Temperature
Standard Temperature (-40 - 250F)
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
Media
Air, Vacuum, Water

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