Normal Operation
C200/C300 - 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.
C400/C500 - 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 - C200/C300
The Backflow Assembly shall consist of two independent Link-check modules within a single housing with sleeve access, required test cocks and drip tight shut-off valves. Link-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. Link-checks shall have reversible elastomer disks and in operation shall produce drip tight closure against the reverse flow of liquid caused by backpressure or backsiphonage. Device shall be an Ames Fire & Waterworks COLT 200 or 300 series.
Specifications - C400/C500
The Reduced Pressure Backflow Assembly shall consist of
two independent Link-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 check modules and the relief valve shall be
contained within a sleeve accessible single housing
constructed from 300 series stainless steel with groove end
connections. Link-checks shall have reversible elastomer
disks and in operation shall produce drip tight closure
against the reverse flow of liquid caused by backpressure or
backsiphonage. Device shall be an Ames Fire & Waterworks COLT 400 or 500 series.
Characteristics and Material
|
C200/C300 |
C400/C500 |
 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 |
|
By Series
Colt Series
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