10
INSTALLATION
For proper operation and approval, you must install the
valve in accordance with the trim diagrams for the Series
758-LPA Deluge Valve. Victaulic provides specific trim
drawings for pneumatic, hydraulic, and electric release
installations.
The Series 758-LPA Deluge Valve must
NOT
be located in
an area that is subject to freezing temperatures. In addi-
tion, the valve must
NOT
be located in an area where
physical damage may occur. It is the owner’s responsibility
to confirm material compatibility of the Series 758-LPA Del-
uge Valve, trim, and associated accessories when a corro-
sive atmosphere or contaminated water is present.
Air or nitrogen supply to the deluge piping system must be
clean, dry, and oil free. Automatic air supplies must be reg-
ulated, restricted, and continuous. Victaulic recommends
the installation of an air maintenance device on any system
with an automatic air supply.
When used with a water motor alarm, configure the valve
with an uninterrupted, low-pressure alarm mounted to the
valve’s piston.
Prior to installing the valve, flush the water supply piping
thoroughly in order to ensure that no foreign objects are
present.
Install the Series 758-LPA Deluge Valve in the vertical posi-
tion with the arrow on the body pointing upward.
1.
Confirm that all required drawings and data for the
installation of the valve are available.
2.
Remove all plastic caps from the valve.
3.
Remove the foam spacer shipped with the valve. This
spacer holds the clapper shut during shipment.
4.
For valves 3" (88,9 mm) or smaller, it is necessary to
remove the piston assembly when trimming the valve.
4a.
Unscrew the piston from the valve’s body.
4b.
Note the position of the o-ring. This o-ring must be in
the same position when you reassemble the piston.
4c.
Install the trim to the back of the valve.
4d.
Reassemble the piston, making sure that the o-ring is
positioned properly and that the piston rod and the latch
engage properly. It may be necessary to rotate the latch
inward (toward the valve body’s center) to ensure proper
alignment.
4e.
Tighten the piston until you achieve metal to metal
contact with the valve body.
5.
Apply a small amount of pipe joint compound or Teflon*
pipe tape to the external threads of all threaded pipe con-
nections. Be careful not to get any tape, compound, or
other foreign substance into the valve or the inside of any
nipples or valve openings.
6.
Make sure the trim drawing matches the system’s
requirements. Install the Victaulic Series 758-LPA Deluge
Valve in accordance with the applicable trim drawings.
7S.
Provide an uninterrupted source of water from
upstream of the main control valve to supply pressure to
the piston charge line prior to opening the main control
valve.
IMPORTANT SETTINGS
Pneumatic Release Systems
1.
For pneumatic release systems used with a Series 776
Low-Pressure Actuator and a base-mounted compressor,
supply an air pressure between 9 psi (62 kPa) minimum
and 14 psi (97 kPa) maximum. The air pressures in this
chart are the “On” or “Low” settings for the pressure switch
on the compressor.
2.
Set the air supervisory switch to activate at 8 psi (55
kPa).
3.
Wire the air supervisory switch to activate a low pres-
sure alarm signal. A high pressure alarm may also be
required by the authority having jurisdiction.
• Before installing the valve, you must remove the foam
spacer that holds the clapper shut during shipment.
Failure to follow this instruction could result in serious per-
sonal injury, property damage, valve leakage, and/or valve
failure.
• Make sure you reassemble and install the piston correctly
according to the instructions contained in this manual.
Failure to follow these instructions could result in serious
personal injury, valve malfunctioning, and/or property dam-
age.
• Make sure that no foreign material gets into the valve’s trim.
Failure to follow this instruction could result in improper valve operation.
*Teflon is a registered trademark of I.E. Dupont de Nemours
DISCONTINUED
PRODUCT
