Double check valve assembly (Backflow preventer DC type)

Category System valve

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

Download Double check valve assembly (Backflow preventer DC type)

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.