TFP980
Page 2 of 6
Operating
Principles
When a fi re sprinkler activates during
domestic usage, the TYCO RAPID
RESPONSE Model RSV-1 Residential
Shut-Off Valve automatically diverts
fl ow to the domestic system and diverts
the available water supply to the fi re
sprinkler system, thereby eliminating a
reduced fl ow condition in the sprinkler
system that might otherwise be caused
by possible signifi cant domestic water
usage.
When the Model RSV-1 Valve is in the
normal standby position as shown in
Figures 4 and 5, the Piston Assembly,
assisted by its Spring, is in the down
position. With the Piston Assembly in
the down position, the Fire Sprinkler
Seal permits the Model RSV-1 Valve
to perform as a conventional check
valve. Also, with the Piston Assembly
in the down position, water is available
on demand through the Domestic Flow
Passage and out the Domestic Port.
Upon operation and with a minimum
design water fl ow (e.g., 12.5 GPM (47,3
LPM) for the 1 inch Valve or 8 GPM
(30,5 LPM) for the 2 Inch Valve) to
the automatic residential fi re sprinkler
system, the Piston Assembly moves
upward. With the Piston Assembly in
the up position, any water fl ow to the
Domestic Port is diverted to the Fire
Sprinkler Port.
The contours of the Piston Assembly
are specifi cally confi gured to minimize
its upward movement except under the
level of sustained fi re sprinkler system
fl ow resulting from operation of one or
more fi re sprinklers. However, because
most fi re sprinkler systems contain air
pockets, the Piston Assembly tends to
move momentarily upward when there
is a surge in supply pressure.
The momentary opening and re-clos-
ing of the Piston Assembly at the Fire
Sprinkler Line Seal traps a portion
of the pressure increase within the
fi re sprinkler system. Trapped pres-
sure increases within the fi re sprinkler
system help to prevent a subsequent
surge in the supply pressure from
causing the water-flow detector to
signal a false alarm.
As indicated above, domestic system
usage can reduce the pressure avail-
able to the fire sprinkler system.
However, when utilizing the Model
RSV-1 Valve, you do not need to include
additional hydraulic fl ow of the domes-
tic system, when otherwise required by
NFPA standards (NFPA 13D or 13R), to
determine the minimum possible resid-
Design Criteria
The TYCO RAPID RESPONSE Model
RSV-1 Residential Shut-Off Valve
must be installed vertically with the
Water Supply Port at the bottom, the
Fire Sprinkler Port at the top, and the
Domestic Port at the side (Ref. Figures
4 and 5). Figure 1 shows the typical
installation arrangement. Refer to
the Installation section for additional
design considerations.
Water Supply Requirements
1 Inch (DN25) Valve
In order for the 1 Inch (DN25) Model
RSV-1 Valve to operate automati-
cally upon sprinkler operation, the fi re
sprinkler system from the water main
to the most hydraulically remote sprin-
kler must be designed to provide a
minimum single sprinkler fl ow of 12.5
GPM (47,3 LPM) when the supply
pressure at the main is at its minimum
expected value.
The minimum single sprinkler flow
rate of 12.5 GPM (47,3 LPM), required
for use with the 1 Inch (DN25) Model
RSV-1 Valve, does not take precedence
over any more hydraulically demanding
single sprinkler fl ow rate specifi ed for
the residential sprinklers in use.
When performing hydraulic design cal-
culations for the fi re sprinkler system,
you need not account for the trickle
fl ow through the 1 Inch (DN25) Model
RSV-1 Valve By-Pass Restriction into
the domestic system.
For the 1 Inch (DN25) Model RSV-1
Valve, the maximum water supply
service line is 1 inch (DN25).
2 Inch (DN50) Valve
In order for the 2 Inch (DN50) Model
RSV-1 Valve to operate automatically
at sprinkler activation, the fi re sprin-
kler 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 fl ow rate specifi ed for
the residential sprinklers in use.
FIRE SPRINKLER
SYSTEM PRESSURE
GAUGE
WATERFLOW
DETECTOR
(FIRE ALARM)
MODEL RSV-1
RESIDENTIAL
SHUT-OFF VALVE
(AUTOMATIC)
WATER
METER
MAIN
CONTROL
VALVE
WATER
SUPPLY
WATER
SUPPLY
GATE
VALVE
BACKFLOW PREVENTER AS
REQUIRED BY AUTHORITY
HAVING JURISDICTION
AUTOMATIC FIRE SPRINKLERS
TO DOMESTIC
SYSTEM
SUPPLY
PRESSURE
GAUGE
DOMESTIC
CONTROL
VALVE
DRAIN AND FLOW
TEST CONNECTION
ALARM TEST
CONNECTION
WATER SUPPLY
MAIN
FIGURE 1
MODEL RSV-1 RESIDENTIAL SHUT-OFF VALVE
TYPICAL INSTALLATION ARRANGEMENT
