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Keckley DD1F-CI-34136-600 Style DD Double Disc Retainerless Check Valve, 6 in Nominal, Wafer End Style, 125 lb, Cast Iron Body, PTFE Softgoods, Import

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Description

Keckley Check Valve, Double Disc Retainerless, Series: Style DD, 6 in Nominal, Wafer, 200 psi, 125 lb, 150 deg F, Media: Gas/Oil/Water, 3 in Inlet to Outlet Length, Cast Iron Body, 316 Stainless Steel/Buna-N/Cast 304 Stainless Steel Trim, PTFE, Epoxy Coated, 8-3/4 in Dia x 3 in D, Import

Keckley wafer body double disc check valves offer an inexpensive way to properly protect your pipeline against flow reversal. Keckley cast iron wafer body double disc check valves have pin retainer holes in the body where plugs are inserted to hold the hinge pin and stop pin in place. Keckley offers a retainer less wafer body design in bronze, carbon steel, stainless steel and other specially cast alloys.

Specifications

Body Material Cast Iron
Dimensions 8-3/4 in Dia x 3 in D
Domestic/Import Import
End Style Wafer
Finish Epoxy Coated
Inlet to Outlet Length 3 in
Media Gas/Oil/Water
Nominal Size 6 in
Pressure Class 125 lb
Pressure Rating 200 psi
Series Style DD
Softgoods Material PTFE
Temperature Rating 150 deg F
Trim Material 316 Stainless Steel/Buna-N/Cast 304 Stainless Steel
Type Double Disc Retainerless

Warranty: 1 Year

Country of Origin: China

Standards and Approvals: ASTM A 126, Class B Body, ASTM A 351, Grade CF8 Disc, ASTM A 182 Spring/Stop Pin/Hinge Pin, ASTM A 307, B Plug, Design ASME B16.1, Conform to API 594 and 6D, MSS SP-6/25/55, Testing API 598

Application:
Liquid or gas where protection from flow reversal in a pipeline is required

Features

  • The Keckley wafer double disc check valves are constructed from rugged castings that are machined to exacting specification
  • A short face-to-face dimension
  • Lighter weight, by 80 to 90 percent than non-conventional full-body check valves
  • Spring-loaded, double disc design has a low cracking pressure
  • The tension spring performs a lifting motion on the disc to prevent excessive wear on the "heel" area of the elastomer seat
  • The independent, dual shaft design allows interchangeability of shaft
  • The stop shaft stabilizes the disc during high flow rates
  • Field serviceable without the need for special tool
  • 6-1/16 in minimum companion flange bore
  • Cast 304 stainless steel disc, 316 stainless steel spring, 304 stainless steel stop pin/hinge pin, carbon steel plug
  • -20 to 250 deg F seat operating temperature
  • 500 deg F spring maximum operating temperature
  • 720 Cv flow coefficient
  • 200 psi at 150 deg F
  • The Keckley wafer double disc check valves are used in both vertical and horizontal application
  • For horizontal flow application the shaft should be vertically oriented and contact keckley for downward vertical flow installation
  • PTFE thrust washer

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