115 Ricou Street • Shreveport, LA 71107 • Phone (318) 221-8454 •
www.infernomfg.com
115 Ricou Street • Shreveport, LA 71107 • Phone (318) 221-8454 •
www.infernomfg.com
MODEL 12T
GAGE VALVE
MODEL 12T GAGE VALVE© 2016 INFERNO Manufacturing Corporation. All rights reserved.
IOM 6-12-2016
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S
tainless Steel
Stainless Steel
Painted Aluminum, Yellow
S
teel
T
FE
T304 SS
T304 SS
Carbon Steel
Carbon Steel
Viton™
Cast Steel (WCB)
Carbon Steel
T304 SS
CRA per NACE MR0175
MATERIAL—Standard MATERIAL—Optional
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ITEM
S
crew
Washer
Hand Wheel
P
acking Nut
P
acking
Stem Washer
Stem
Stuffingbox Nut
Washer
O-Ring, 2-208
Body
Pipe Plug, 1/4” NPT
Ball, 3/8”
Snap Ring
DESCRIPTION
MODEL 12T PARTS LIST
MODEL
12T
I
NSTALLA
TI
ON
WEIGHT: 3.3 lbs (1.5 kg) per set
n
/a
n/a
Blue for SS
S
tainless Steel
G
rafoil™ when required
T316 SS
T316 SS
Stainless Steel
Stainless Steel
Various
T316 SS (CF8M)
T316 SS
T316 SS
n/a
Glass OAL = Valve C-C less 2”
MODEL ATSMODEL TE
ARMORED TUBULAR GAGES
• Glass Isolated from force of
compression nut
• O-Ring Sealed
• Protective
Stainless Armor
Galvanized Steel
Construction in
standard 48”
length (welded
option to 96
OAL)
Stainless Steel
hose clamps, not
pictured, secure
guard over
compression nut
for greater rigidity
BARE GLASS—EXPANDED METAL (PREFERRED) OR GUARD RODS
Guard Rods: 3/16” Ø
Guard Rod Length =
Valve C-C + 1/2”
WARNING: Guard
rods not recom-
mended over 12”
length
M
o
un
t va
lve
s to
ta
n
k
; be
sure
to m
o
un
t u
pp
er va
l
ve
at top & lower valve at bottom.
Transfer the nut, washer and seal from the valve to
the end of the glass tube as shown. If using an In
-
ferno Model TE gage instead of a bare glass tube
then transfer these three items to the tubular end
fittings of the gage.
WARNING: If the nut, washer and seal are left as
-
sembled
on the valve and if the end of the glass is
st
abbed t
hrough t
he nut
and washer and int
o t
he
valve it is possible for the
seal to sit off center and be
sheared. Avoid damage
to O-ring seal by first trans
-
ferring these three
items to the glass tube (or the end
fittings when using a Model TE).
Insert glass
deeply
into
upper
valve
at an angle as shown. Insert until
bot
t
om
of
glass clears the lower
v
a
l
v
e
a
n
d
c
an
swing
into
place.
For
sh
o
rt
C
-C
distances (under 12”) it
may
be
necessary to angle the
u
p
p
e
r
v
a
l
v
e
b
o
d
y
sl
i
g
h
tl
y
(l
e
ss
th
a
n
1/8 turn) in the vessel coupling.
Lower the glass into resting
position in lower valve.
Lowe
r
Valve
2.
Transfer Parts
Bare Glass
Shown
Upp
er
Valve
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2.
3.
4.
RATING
Pressure rating of glass will always limit the rating of
the valve. Do not operate this valve at pressures
higher than the rating of the glass.
BALL CHECKS
This valve contains a safety ball check which is de-
signed to automatically close in case of glass or seal
failure. Pressure acts on the ball and forces it against
the upstream side of the seat. It takes approximately
6” head pressure (water) to move the ball into check
position. Lower head pressure is not enough to check
the ball. Also a low volume leak will not provide ade-
quate force to move the ball closed. The safety ball is
designed to prevent a large leak such as might occur
when a glass blows out under pressure. It is not de-
signed to completely contain a leak. Corrosion or
trash between the ball and the seat will interfere with
seating to some degree. However ball checks are a
good safety device. In high pressure operation they
can greatly limit the explosive force of a glass failure.
STEAM WARNING
Because of rapid corrosion of tubular glass by hot
water, we recommend reflex glass or see-thru glass
with mica protection in steam service over 50 WSP or
300°F.
GLASS CLEANING
With valve stem(s) in full open position and drain
plug(s) removed a cleaning brush may be inserted
through valve body and into glass.
NUISANCE CHECKING
Balls will check when a sight glass is “blown down”
using a drain valve attached to the bottom of the
lower valve. When this happens both gage valves
must be closed and then slowly reopened until the
fluid has a chance to equalize between the vessel
and the glass. After a liquid level is re-established in
the sight glass the valves should be opened all the
way. This withdraws the “pusherextension of the
valve stem from the ball cavity. With the valves
opened in this way the ball is set up again to close
automatically in case of a pressure differential.
WARNING: The valves should be opened 2 full turns
minimum to enable automatic safety closing. For this
reason it is best to operate the valves FULL OPEN
as a standard practice. That way the ball checks are
always enabled and the safety feature is maintained.
Ball denied
seating by stem
in closed or
“cracked” position
MAXIMUM WORKING PRESSURE, PSI
PRESSURE/TEMPERATURE RANGES
STANDARD FEATURES
-
300°F -50°F -20°F 100°F 200°F 300°F 400°F 500°F
-184°C -46°C -29°C 38°C 93°C 149°C 204°C 260°C
C
ast Steel (WCC) 600 600 600 600 600 600
C
ast SS (T316) 600 600 600 600 600 600 600 600
Improved Sealing on Glass with standard size 2-208 O-ring—
Lower torque requirement
Wide choice of elastomers (Viton™ is standard)
Safety ball check provides automatic shut-off in case of glass breakage
Straight Pattern
Rigid Vessel Connection
Integral Seat
5/8” Diameter Glass
Corrosion resistant SS trim
“UPPER” and “LOWER” markings
help insure correct installation materials
TFE Stem Packing standard—
low friction turning
Conforms to NACE MR-01-75
WARNING:
GLASS TUBING RATINGS LIMITED BY WALL THICKNESS AND OVERALL LENGTH