Bulletin 15A
Issued 3/07
Replaces 10/04
MODEL 15A
SIGHT GLASS GAGE VALVE
Secondary Seal— O-Ring in union overcomes
effects of minor piping misalignment
Hex area of valve body allows space for
back-up wrench when making up union—
more secure grip for wrench—tighter and
safer installation
“Floating Union” vessel connectors allow ± 1/4”
center-to-center adjustment—more “float”
than any other brand
Name plate includes
instructions for correct
operation of safety ball checks
Corrosion resistant SS trim
(ball check, packing washer, stem)
TFE Stem Packing standard—low friction turning
STANDARD INFERNO BENEFITS
PRESSURE/TEMPERATURE RANGES
Maximum working pressure, PSI
C 2007 Inferno Mfg. Corp. All rights reserved.
3000 PSIG @ 100°F
VESSEL CONNECTION
Union 3/8" NPTM X
1/2" NPTM X
3/4" NPTM X
1" NPTM (Non-Float) X
Spherical Union 1/2" NPTM X
3/4" NPTM X
1" NPTM X
Socket Weld 1/2" S/W Male X
3/4" S/W Male X
1" S/W Male (Non-Float) X
Solid Shank 1/2" NPTM X
3/4" NPTM X
1" NPTM X
Flanged X
UNION VESSEL SEAL
Viton™
X
Buna (Nitrile) X
Aflas™
(to 400°F Steam)
X
Hi-Temp (to 525°F Steam)
X
TFE X
Omitted X
GAGE CONNECTION
Rigid 1/2" NPTF
X
3/4" NPTF X
Socket Weld 1/2" S/W F X
3/4" S/W F X
Flanged X
VENT / DRAIN CONNECTION
Rigid 1/2" NPTF
X
3/4" NPTF X
STEM PACKING
TFE (up to 500°F)
X
GRAFOIL™ X
TRIM
T410 SS
X
T316 SS X
BALL CHECK SHUT-OFF
Horizontal Lower & Upper X
Omitted (acceptable for ASME service) X
Vacuum-Horizontal Lower & Upper X
Handwheel with Standard Pitch Thread
X
Lever with Quick Closing Thread X
SEAT DIAMETER 3/8” Ø X
1/2” Ø X
OPTIONAL
STANDARD
OFFSET PATTERN
INTEGRAL BONNET
INTEGRAL SEAT
valves for
flat glass
gages
-300°F -50°F -20°F 100°F 200°F 300°F 400°F 500°F 600°F 750°F
-184°C -46°C -29°C 38°C 93°C 149°C 204°C 260°C 316°C 399°C
Grafoil Packing Req'd
Forged Steel 3000 3000 2925 2850 2800 2625 2350 1950
Heat Treated Steel 3000 3000 3000 2925 2850 2800 2625 2350 1950
Stainless Steel 3000 3000 3000 3000 2925 2850 2800 2625 2350 1950
MANUFACTURING CORPORATION
115 RICOU ST • SHREVEPORT, LA 71107-6933
318-221-8454 • FAX 318-222-4106 • www.infernomfg.com
PAGE
15A1
INFERNO
4.54
9.5" OPEN
9.5" Open
4.5"
Steel
Steel
Ductile Iron
Steel
Steel
TFE
T410 SS (CR13)
T410 SS (CR13)
Forged Steel, A-105
Viton™
T304 SS
SS
Forged Steel, A-105
Forged Steel
MATERIAL—Standard MATERIAL—Optional
PAGE
15A2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
ITEM
Screw
Washer
Hand Wheel
Packing Nut
Packing Gland
Packing
Stem Washer
Stem
Body
O-Ring, Size 2-116
Ball
Snap Ring
Floating Shank
Union Nut
DESCRIPTION
1
bl
4
8
bn
bk
5
2
3
bm
9
bo
6
MODEL 15A PARTS LIST
WEIGHT: 11.1 lbs (5.0 kg) per set
STANDARD
bo
Vessel Connector “floats” off center by 1/8” in all directions.
Combined float in upper and lower valves allows for up to
±1/4” variation in vessel centers.
FLOATING SHANK
O-RING SEAL
Union Nut omitted
for clarity
7
External Hex Creates Area
for Back-Up Wrench
1.25" Take-Out
SS
SS
T316 SS
T316 SS
Grafoil™
T316 SS
T316 SS
T316 SS
various
T316 SS
T316 SS
T316 SS
T316 SS
SPHERICAL UNION
Provides ± 8° movement to
compensate for angular mis-
alignment. Also provides for
center-to-center variation when
used with elbow fittings—or
when used with a “close hook-
up” gage. Matching spherical
surfaces can be made up
repeatedly w/o leakage.
INFERNO
MANUFACTURING CORPORATION
115 RICOU ST • SHREVEPORT, LA 71107-6933
318-221-8454 • FAX 318-222-4106 • www.infernomfg.com
OPTIONAL
.75" Offset
Steel valves require optional T304 or
T316 S.S. stem & washer to conform
to NACE MR-01-75
Unique Design— Secondary O-Ring Seal Improves Sealing
No more paper gaskets! Replacement Ring size: Parker 2-116
Conventional metal to metal union without O-Ring or gasket is
designed with one flat face and one beveled face. Tightening the
nut causes the two surfaces to c-r-u-s-h together. However when
misalignment is present, too much work is diverted into bending the
various piping elements and not enough force is available to crush
the two faces together. Without an additional seal a leaky joint can
result. A bevel & flat face geometry is still used in the Inferno union
but now an O-Ring is present to finish the job.