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Double check valve assembly (Backflow preventer DC type)

Double check valve assembly (Backflow preventer DC type)

Category
  • Certificate: UL Listed / FM Approved
  • Standard: AWWA C510, UL 1469, Lead free as NSF/ANSI/CAN 61
  • Connection: Grooved, flanged ANSI B16.1 Class 125, etc.
  • Feature: Double check, horizontal or vertical installation
  • Temperature: 1°C to 60°C
  • W. pressure: 175 psi
  • Surface: FBE coating as AWWA C550

Product Details

Double check valve assembly (Backflow preventer DC type) is an assembly of two check modules. With fail-safe design, it is used in connections between public water supply and fire protection system to fully prevent backflow.

Available size (Source 1 with UL/FM)

Size Configuration Connection Working pressure (psi) Ref. No.
2 1/2″ / DN65 DC + IGB GxG 175 V7101 (UL/FM)
3″ / DN80 DC + IGB GxG 175 V7102 (UL/FM)
4″ / DN100 DC + IGB GxG 175 V7103 (UL/FM)
6″ / DN150 DC + IGB GxG 175 V7104 (UL/FM)
8″ / DN200 DC + IGB GxG 175 V7105 (UL/FM)
2 1/2″ / DN65 DC + OSY FxF 175 V7106 (UL/FM)
3″ / DN80 DC + OSY FxF 175 V7107 (UL/FM)
4″ / DN100 DC + OSY FxF 175 V7108 (UL/FM)
6″ / DN150 DC + OSY FxF 175 V7109 (UL/FM)
8″ / DN200 DC + OSY FxF 175 V7110 (UL/FM)
10″ / DN250 DC + OSY FxF 175 V7111 (UL/FM)

Note:
1. DC + IBG means double check modules and two integral grooved butterfly valves. And it is also available with flanged connection through an extra flange adapter, to match ANSI B16.1 Class 125.
2. DC + OSY means double check modules and two OSY gate valves with flanged connection as ANSI B16.1 Class 125.

 

Available size (Source 2 with UL)

Size Configuration Connection Working pressure (psi) Ref. No.
3″ / DN80 DC + OSY FxF, GxG, FxG 175 V7121 (UL)
4″ / DN100 DC + OSY FxF, GxG, FxG 175 V7122 (UL)
6″ / DN150 DC + OSY FxF, GxG, FxG 175 V7123 (UL)
8″ / DN200 DC + OSY FxF, GxG, FxG 175 V7124 (UL)

Note:
1. DC + OSY means double check modules and two OSY gate valves with multiple ends types by FxF, GxG, FxG.
2. The material of check module assembly is ductile iron, not SS304.

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