F03-02-01-002
Pressure Rating
Maximum working pressure*:
300 psi
(21 bar).
* standard material valve.
Temperature Range
0
0
Water: Max. +150 F (+65 C).
Installation Position
Vertical or horizontal.
Materials
Standard
Valve Housing
:
Forged Steel (SAE 1021).
Valve Ends and Wafer Flow Test & Drain
Ends:
Ductile Iron (ASTM A536 65-45-12).
Threaded, Flanged, and Grooved Flow
Test & Drain Ends:
Carbon Steel (SAE 1020).
Sleeve:
SMR5 Elastomer reinforced with poly-
ester and Kevlar.
Control Trim:
Brass Nickel Chrome plated, Stainless
Steel, and Galvanized Steel.
Optional
Cast Steel ;
Bronze ;
Nickel Aluminium Bronze ;
Stainless Steel
AISI
316 ;
Super Austenitic Stainless Steel ;
Super Duplex Stainless Steel ;
Titanium.
Coating
Standard
Powder epoxy coated. Thickness: 0.004"
(0.1 mm) external and internal surfaces.
Optional
High built epoxy coated and polyure-
thane finish. Thickness: 0.01" (0.3 mm).
®
Halar
coated. Thickness: 0.02"
(0.5 mm) .
®
Halar
is a registered trade mark of A
usimont USA I nc.
Control Trim
On
standard, the control trim is supplied
preassembled in sections. If self
assembly is required, all the trim
components are supplied in loose form.
The complete control trim includes the
following components :
!
Flow Release Pilot (F.R.P.) with a built-
in check valve.
!
Y- Strainer with a stainless steel screen.
!
Alarm Test Valve - 3 way, L-port,
quarter turn ball valve.
!
Trim Shutoff Valve, Flow Test Valve,
and Drain Valve are quarter turn ball
valves.
!
Supply and System Pressure Gauges,
with dual scale (psi and bar).
!
Pressure Gauge Valves - 3 way, quarter
turn ball valves.
!
Drain Cup and Drain Tubes.
!
Automatic Drain Valves.
!
Emergency Release Station .
Features
!
N o M o v i n g M e c h a n i c a l P a r t s
(N.M.M.P.) construction ensures a long
life of dependable operation, reducing
the cost of maintenance.
!
Quick, yet soft opening performance -
eliminates water hammer and conse-
quent damages.
!
The line pressure is sufficient to close
the
Inbal
Valve tightly. Can perform
also, when water supply valve is not in
use.
!
Optional opening and/or closing speed
control is available.
!
Anticolumning device is available for
long or high elevation wet pilot line.
!
Fast and easy reset by thumb activated
knob.
!
Supplied as standard preassembled in
sections - saves the self assembly cost.
!
Remote emergency release stations can
be used for manual operation.
!
Can be installed vertically or
h o r i z o n t a l l y .
!
Compact design - minimum space for
valve and trim.
!
Unique principle of operation prevents
false operation due to water surges.
!
Pressure rating to 300 psi (21 bar) for
standard material valve.
!
Wide range of sizes for an ideal system
design.
!
Control trim made of high grade
materials as standard.
!
Epoxy coating supplied as standard -
ensures excellent corrosion resistance.
!
Variety of available materials - to
ensure corrosion-free service even
under severe conditions.
!
The same basic trim is compatible with
electric, pneumatic, and/or hydraulic
release.
!
Additional functions, such as pressure
control or another release system,
could be added on the same valve body.
Operation
The Control Chamber of the
Inbal
Automatic Water Control Valve is the
annular space between the valve
Housing and the Sleeve. The valve is
held in a closed position as long as inlet
pressure is maintained in the Control
Chamber.
The wet pilot line, equipped with closed
sprinkler heads, is pressurized through
the valve trim and located over the
protected area. The wet pilot line serves
the dual purpose of thermal detection and
release system.
In the set position, water pressure is
applied to the Control Chamber of the
Inbal
D eluge Valve and to the hydraulic
release system from the upstream of the
Water Supply Valve. Consequently, the
Inbal
D eluge Valve stays closed.
The
Inbal
Deluge Valve opens wide
when one or more of the sprinklers
installed on the wet pilot line fuses and
water pressure is allowed to vent, or
when a hydraulic manual release opens.
Either one of these operations releases
water from the
Inbal
Control Chamber.
The
Inbal
Deluge Valve opens fully
introducing a flow of water to the system
while activating the system alarm
devices. Water will flow from any open
sprinklers and/or spray nozzles on the
system. The operation of the
Inbal
Deluge Valve and the flow released from
the Control Chamber activate the Flow
Release Pilot (F.R.P) to latch in an open
position, isolating the Control Chamber
from the inlet water supply. The F.R.P
operation prevents the
Inbal
Deluge
Valve from closing even if the open
releasing wet pilot line closes. The
Inbal
Valve will close only when the Resetting
procedure is followed.
The maximum elevations in which the
wet pilot sprinklers or manual release
stations can be installed are shown on
Graph (1).They are presented in relation
to the various lengths of pilot lines and to
the water supply pressure.
The Emergency Release Valve is used
for emergency actuation of the
Inbal
Deluge Valve and for routine testing.