Table of Contents
Advertisement
DRY PIPE VALVE -
4 and 6 INCH (100 and 150 mm)
MODEL F302 (FLANGE x FLANGE) & F3021 (FLANGE x GROOVE)
The 4 and 6 inch (100 and 150 mm),
Model
F302
and
F3021
Dry
Pipe
Valves
are
differential,
latch
type
valves
used to automatically
control
the flow of water into dry pipe fire pro-
tection sprinkler
systems
upon opera-
tion of one or more automatic
sprin-
klers.
The
F302
and
F3021
also
provide
for actuation
of fire alarms
upon system operation.
Both model valves
have flanged
inlet
connections
and are identical
with the
exception
of the outlet connection.
The
Model F302 has a flanged
outlet con-
nection, whereas the Model F3021 has
a grooved outlet connection.
Dry pipe sprinkler
systems
are typi-
cally used in unheated
warehouses,
parking
garages,
store windows,
attic
spaces, loading docks, and similar ar-
eas exposed to freezing temperatures,
where water
filled pipe cannot be util-
ized. When set for service,
a dry pipe
sprinkler system is pressurized
with air
(or nitrogen),
and the loss of air pres-
sure through
an operated
automatic
sprinkler,
in response
to heat from a
fire, permits the dry pipe valve to open
and allow a flow of water into the sprin-
kler system piping. The differential
de-
sign of the F302/F3021
is such that the
minimum
air pressure
in the piping is
approximately
one-sixth
of the static
water supply pressure,
with an added
20 psi (1,4 bar) safety factor, to help
prevent
a false operation
that might
otherwise
occur due to water
supply
pressure fluctuations.
-4PcC
LEFT
SIDE
4 Inch (100 mm) Valve
j-1
PIPE
O.D.
REAR
LEFT
SIDE
6 Inch (150 mm) Valve
VAI
SL
-VE
A
XE
B
C
D
E
F
G
H
$0)
(32,O)
NL
l/2"
114"
n
N:T
2.56
6.88
2.56
NPT
NPT
(650)
(1748)
(650)
(1 :O)
(4;:.8)
N:T
l/2'
l/4"
NET
2.56
6.06
2.50
NPT
NPT
(65,O)
(153,9)
(6385)
Nominal Dimensions
in Inches and (mm)
VALVE
J
SIZE
K
L
M
N
P
Q
R
($0)
(l?&
(:k$)
(;ti$)
(ly6)
g:,
(pdyi)
(lz$,
(Liz,
2.75
3.25
6.25
2.56
(6%9)
(82,6)
(1568)
(650)
FIGURE A
MODEL F302/F3021
DRY PIPE VALVES
-
DIMENSIONS
AND PORT LOCATIONS
-
Printed in U.S.A. 11-97
TD107
Advertisement
Table of Contents
Need help?
Do you have a question about the Gem F302 and is the answer not in the manual?
Questions and answers