Tyco Star Hydrus S30 Manual

Hydrus™ Alarm Check Valves,
S30 (Groove x Groove)
S3001 (Flange x Groove)
GENERAL DESCRIPTION
The Star Hydrus S30/S3001 Alarm Check Valves are di-
vided seat ring, rubber faced clapper, waterflow alarm
check valves which are intended for use in wet pipe (auto-
matic sprinkler) fire protection systems. They are de-
signed to automatically actuate electric and/or hydraulic
alarms when there is a steady flow of water into the sys-
tem which is equivalent to the discharge rate of one or
more sprinklers.
The Star Hydrus Alarm Check Valves are designed for
vertical installations. Flanged connections are per ANSI
Standard B16.1. Grooved connections are suitable for
use with grooved end couplings that are listed or ap-
proved for fire protection service.
A separately ordered, Star Model S310 Retard Chamber
is required for installations subject to variable pressures.
It is used to help prevent false alarms associated with
variable pressure public water supplies.
The Star Alarm Check Valve Trim includes pressure
gauges to monitor system pressure conditions, a by-pass
check valve, a main drain valve, an alarm control valve,
and an alarm test valve. The bypass check valve serves
to reduce the possibility of false alarms by permitting
slow as well as small transient increases in water supply
pressure to be passed through to the system without
opening of the waterway clapper.
WARNING
The Hydrus S30/S3001 Alarm Check Valves described
herein must be installed and maintained in compliance
with this document, as well as with the applicable stand-
ards of any authorities having jurisdiction. Failure to do
so may impair the integrity of these devices.
The owner is responsible for maintaining his fire protec-
tion system and devices in proper operating condition.
The installing contractor or sprinkler manufacturer should
be contacted relative to any questions.
STAR SPRINKLER INC.
414-570-5000 • 800-558-5236 • FAX 414-570-5010
S30
2-1/2 Inch: #4915
S3001
2-1/2 Inch: #4910
TECHNICAL DATA
Approvals
UL and ULC Listed. FM Approved.
Working Water Pressure Range
20 to 175 psi (1.4 to 12.1 bar).
Friction Loss
Refer to Figure 2.
Physical Characteristics
The body and handhole cover are cast iron, the seat ring
is bronze, and the clapper is stainless steel with an
EPDM clapper facing.
OPERATION
When the fire protection system is initially being pressur-
ized, water will flow into the system until the water supply
and system pressure become equalized and the torsion
Spring closes the Clapper. Once the pressures have stabi-
lized, the Alarm Check Valve is ready to be placed in serv-
ice and the Alarm Control Valve must be opened.
In the case of variable pressure systems, slow as well as
small transient increases in water supply pressure may
continue to be built up in the system (via the bypass
check valve) without opening the Clapper. A transient
surge in supply pressure which is sufficient to only mo-
mentarily open the Clapper will not cause a false alarm,
and a portion of the increase in pressure will be trapped
within the system, thus reducing the possibility of another
opening. Any water in the alarm line is automatically
drained, which helps to further reduce the possibility of a
false alarm due to a successive transient surge in supply
pressure.
When there is a steady flow of water into the sprinkler
system due to an alarm test, a sprinkler operation, or a
sustained surge in supply pressure which is sufficient to
maintain the Clapper open, the water motor alarm and/or
the pressure alarm switch will be actuated. The alarms
will continue to be actuated as long as the Clapper re-
mains opened. They may be silenced by closing the
Alarm Control Valve. Water in the alarm lines will automat-
ically drain out through the 1/8" (3.2 mm) drain orifice in
the Restriction Assembly (Figure 4) once the Alarm Con-
trol Valve is shut or the waterway Clapper closes (due to
E-mail starsprk@execpc.com
2-1.1.30
6-99