INFERNO MANUFACTURING CORPORATION
115 RICOU ST • SHREVEPORT, LA 71107-6933
318-221-8454 • FAX 318-222-4106 • www.infernomfg.com
MODEL 12T
GAGE VALVE
PAGE
12T1
“UPPER” and “LOWER” markings cast into valve
bodies insure correct installation, with glass resting
on ledge in lower valve. Markings permit inspector to
confirm correct positioning without removing
glass. Reversing the two valves allows glass
to drop down too far and disengage from seal in
upper valve, causing leak.
Other brands lack adequate markings
PRESSURE/TEMPERATURE RANGES Maximum working pressure, PSI
...pressure limited by tubular glass
© 2016 Inferno Mfg. Corp. All rights reserved.
600 PSIG @ 100°F (limited by glass)
NACE MR-01-75 Body & Trim
12T-CS... recommended for sweet service
12T-SS... recommended for salt water and
sour service
-100°F -50°F -20°F 100°F 200°F 300°F 400°F 450°F
-73°C -46°C -29°C 38°C 93°C 149°C 204°C 232°C
12T-CS... Steel 600 600 600 600 600 600
12T-SS... T316 600 600 600 600 600 600 600 600
VESSEL CONNECTION
Solid Shank 1/2" NPTM
X
GAGE CONNECTION
Glass Stuffingbox
5/8" Diameter X
VENT / DRAIN CONNECTION
Rigid
1/4" NPTF X
GLASS SEAL, Size 2-208
Viton™ X
Aflas X
Kalrez™ X
TFE X
STEM PACKING
TFE (up to 450°F) X
GRAFOIL™ X
TRIM per NACE
T304 SS X
T316 SS X
BALL CHECK SHUT-OFF
Horizontal Lower & Upper X
Vertical rising ball check in lower valve (ASME) X
Omitted (acceptable for ASME service) X
Vacuum Service X
OPTIONAL
STANDARD
STRAIGHT PATTERN
INTEGRAL BONNET
INTEGRAL SEAT
valves for
tubular glass
Bulletin 12T
Issued 6/16
Replaces 1/06
LO
W
ER
TFE OR SPECIAL BUNA SEAL AFLAS SEALSTANDARD VITONGLASS SEAL
Sa
f
e
ty b
a
ll ch
e
ck p
r
ovid
e
s auto
ma
t
ic
shut-off in case of glass breakage
Oilfield service frequently requires cleaning of
ball cavity. Inferno snap ring type ball retainer
permits easy access and easy re-installation
with needle nose pliers.
Other designs using tooth lock washer require
operator to re-form the margin of valve body using
special tools. Imperfect re-forming is likely to result
in loss of tooth lock washer and safety ball check
Superior O-ring Glass Seal—
Readily available, Standard Parker size 2-208
Other brands use hard to find proprietary
sleeve “rubbers”
Standard Viton™ O-ring (rated to 400°F)
Other brands use EPDM (rated to 220°F)
and neoprene (rated to 300°F)
O-Ring permits lower torque on glass packing nut
INFERNO MANUFACTURING CORPORATION
115 RICOU ST • SHREVEPORT, LA 71107-6933
318-221-8454 • FAX 318-222-4106 • www.infernomfg.com
LOW
ER
1
2
3
4
5
67
8
9
10
11
13
12
14
PAGE
12T2
Glass OAL = Valve C-C less 2”
5.4”
1.8”
2.9”
LOW
ER
LOCK WASHER
NOT SHOWN
2.5”
1.
5”
Hex
Stainless Steel
Stainless Steel
Aluminum: Yellow (12T-CS) or Blue (12T-SS)
Carbon Steel (12T-CS) or T316 SS (12T-SS)
TFE
T304 SS (12T-CS) or T316 SS (12T-SS)
T304 SS (12T-CS) or T316 SS (12T-SS)
Carbon Steel (12T-CS) or T316 SS (12T-SS)
Carbon Steel (12T-CS) or T316 SS (12T-SS)
Viton™
Carbon Steel (12T-CS) or T316 SS (12T-SS)
Carbon Steel (12T-CS) or T316 SS (12T-SS)
T304 SS (12T-CS) or T316 SS (12T-SS)
CRA per NACE MR0175
MATERIAL—Standard Optional
1
2
3
4
5
6
7
8
9
10
11
12
13
14
ITEM
Screw, #10-32
Washer
Hand Wheel
Packing Nut
Packing
Stem Washer*
Stem*
Stuffingbox Nut
Washer
O-Ring, 2-208
Body**
Pipe Plug, 1/4” NPT
Ball, 3/8”
Snap Ring*
DESCRIPTION
MODEL 12T-CS OR 12T-SS PARTS LIST
WEIGHT: 3.3 lbs (1.5 kg) per set
Grafoil™
Aflas™,TFE, Kalrez™
MODEL ATSMODEL TE
ARMORED TUBULAR GAGES
• Glass Isolated from force of
compression nut
• O-Ring Sealed
• Protective
Stainless Armor
Expanded Metal
Cage in standard
48” length-
galvanized steel
(welded option
to 96” OAL)
Stainless Steel
hose clamps, not
pictured, secure
guard over
compression nut
for greater rigidity
BARE GLASS—PROTECTED WTH EXPANDED METAL OR GUARD RODS
Expanded Metal
Guard (Cage) length:
Vessel C-C less 2
Guard Rod Length =
Vessel C-C + 1/2”
WARNING: Guard rods
are 3/16” Ø maximum
and not recommended
over 12” length
*Trim parts are annealed per mechanical requirements of NACE MR0175, Part 3
** Valve body cast per ASTM A-216 Gr WCB (Normalized) or A-351 Gr CF8M