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SilverEagle&8482; Series

SilverEagle™ Series

Normal Operation
757/757DCDA - In normal flowing operation, the independent Link-check remains closed until there is a water demand. Each check will then open and maintain an approximate 1 PSI differential in the direction of flow. In a nonflow or backflow condition, both checks will close until the resumption of normal flow.

957/957RPDA - In normal flowing operation the independent check valves will be open and the pressure differential relief valve located between the two check valves, the area called the zone, will automatically open and close to maintain the zone pressure at least 2 PSI lower than the inlet pressure. If demand for flow stops, the differential pressure relief valve will automatically open and discharge water to maintain the zone at a pressure of 2 PSI lower than the inlet pressure. After the pressure differential is reestablished, the differential pressure relief valve will automatically close.

Specifications - 757/757DCDA
The Double Check Valve Assembly shall consist of two independent
torsion spring check modules within a single housing with sleeve access, required test cocks and drip tight shut-off valves. Torsion spring checks may be removed and reinstalled in housing without any special tools. The housing shall be constructed of 300 Series stainless steel with groove end connections. Torsion spring checks shall have reversible elastomer discs and in operation shall produce drip tight closure against reverse flow
caused by backpressure or backsiphonage. Assembly shall be a Watts Regulator Company 757 or 757DCDA.

Specifications - 957/957RPDA
The Reduced Pressure Zone Assembly shall consist of two independent torsion spring check modules, a differential pressure relief valve located between and below the two modules, drip tight inlet and outlet shutoff valves, and required test cocks. Both torsion spring check modules
shall be contained within a sleeve housing constructed from 300 series stainless steel. Torsion spring checks shall have reversible elastomer discs and in operation shall produce drip tight closure against reverse flow caused by backpressure or backsiphonage. Assembly shall be a Watts
Regulator Company 957 or 957RPDA.

757/757DCDA	957/957RPDA
Rated Working Pressure 175 PSI	Rated Working Pressure : 175 PSI
Hydrostatic Test Pressure : 350 PSI	Hydrostatic Test Pressure : 350 PSI
Temperature Range : 33 F - 110 F	Temperature Range : 33 F - 110 F
Body Construction : 300 Series Stainless Steel	Body Construction : 300 Series Stainless Steel
End Connection : Groove per AWWA C-606 (IPS) or Flange per ANSI B16.1, Class 125	End Connection : Groove per AWWA C-606 (IPS) or Flange per ANSI B16.1, Class 125

757/957 Series Specification Sheets	Download
757/757N
757a/757Na
757 DCDA/757N DCDA
757a DCDA/757Na DCDA
957/957N/957Z
957 RPDA/957N RPDA/957Z RPDA

757/957 Series Installation Sheets
RP/IS-757/757DCDA
RP/IS-757a/757aDCDA
RP/IS-957/957RPDA

Features of the SilverEagle Series
•	70% lighter than traditional designs
•	Most compact design in the industry
•	Entire valve body and quick access sleeve manufactured from 300 Series Stainless Steel
•	Approved with gate valves or UL/FM butterfly valves
•	Approved for horizontal, vertical or "N" patterns, 957 also availible in "Z" pattern
•	Utilizes groove connections for ease of installation & pipe alignment
•	Patented Link-check assemblies allow ease of serviceability
•	Replacable check disc rubber
•	Smallest Enclosure

More Information


	Product Brochure
	Click here to download the 757/757DCDA Series Brochure.

	Product Brochure
	Click here to download the 957/957RPDA Series Brochure.

USC Cross-Connections in Household Plumbing Systems Study
There are a number of potential cross-connections in household plumbing systems that must be protected against backflow. To learn more about these hazards and to download a recent study from USC on cross-connections in household plumbing systems,

For more info, click here.

Stop Backflow News
Backflow contamination can have hazardous or even fatal results. It is essential that backflow prevention programs be put in place and maintained on an ongoing basis. Stop Backflow news presents many case histories outlining the effects of backflow contamination.

To download this brochure, click here.

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