(In picture - 2" valve is on the right).
Tyco RSV-1 x 2" F.NPT Residential Rapid Response Shut-Off Valve.
The 2" (DN50) is designed for either NFPA 13D or NFPA 13R.click here
">Tyco DN50 Spec. Sheet
During the design of a residential sprinkler system, domestic water use should be taken into consideration unless the domestic supply can be stopped when a sprinkler operates.
When a sprinkler operates, water supply is automatically diverted from the domestic system to the sprinkler system.
Eliminates the need for pumps, pressurized storage tanks, or electrically operated domestic shutoff valves.
Valve automatically resets after the fire protection system is returned to normal service.
Maximum rated working pressure is 175 psi (12,1 bar).
Listings and Approvals: UL, C-UL, & NSF.
2 Inch (DN50) Valve:
In order for the 2 Inch (DN50) Model
RSV-1 Valve to operate automatically
at sprinkler activation, the fi re sprinkler system from the water supply
main to the most hydraulically remote
sprinkler must be designed to provide
a minimum single sprinkler fl ow of 8
GPM (30,5 LPM) when the water supply
pressure at the water supply main is at
its minimum expected value.
The minimum single sprinkler fl ow rate
of 8 GPM (30,5 LPM), required for use
with the 2 Inch (DN50) Model RSV-1
Valve, does not take precedence over
any more hydraulically demanding
single sprinkler flow rate specified for
the residential sprinklers in use.