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Keystone-P-P000478

Keystone Series V11 Butterfly Valves

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Product Description

These instructions must be fully read and understood before beginning maintenance.

Features

  • The concentric disc offers bi-directional service and allows high Cv values with its symmetric shape
  • Primary seal is formed by the disc hub and stem top, the seat contact exceeds the pressure rating of the valve
  • Secondary stem seal is suitable for high pressure and is self-adjusting
  • Disc hub edge are rounded and hand polished to provide full concentric sealing without seat obstruction to flow, combined with maximum seat life
  • Replacement seat isolates the stem and body parts from the stream and also serves as the flange gasket
  • Moulded-in O-ring provides positive flange sealing and eliminates the need for gasket
  • Double flanged body design specified according to JIS F7480
  • Heavy duty top bushing absorbs side thrust and torque loads
  • Stainless steel disc screws allow quick and easy disassembly
  • Factory testing of every valve at full rating ensures 100% tight shut-off
  • Type approved by various major shipping class

Specifications

Certifications
ABS
Application
Ballast Control
Body Design
Short Pattern
Material
Carbon Steel, Cast Iron
Operating Temperature
Up to 250 F (120 C)
Pressure Class
PN
Seat/Seal Type
Resilient
Shutoff Class
Zero Leakage
Valve Size
NPS 10 / DN 250, NPS 8 / DN 200, NPS 6 / DN 150, NPS 24 / DN 600, NPS 18 / DN 450, NPS 16 / DN 400, NPS 14 / DN 350, NPS 12 / DN 300, NPS 20 / DN 500, NPS 4 / DN 100, NPS 2-1/2 / DN 65
Valve Size Standard
DN
Valve Type
Butterfly
Media
Fuel Oil, Liquid, Liquids
Stem
O-ring

Documents & Drawings