Features
Sizes 1/2" NPT up to 2" Flanged
Auto Ball Checks
For Glass Tube or Shielded Gauges
Ratings
Pressure Ratings
are subject to the
limitations of the gauge glass (Page 42)
Temperature Ratings are subject to the
limitations of the packing (Page 45).
Materials
Body: 316 Stainless Steel
Glass Packing: Teflon®*
Stem Packing: Graphite Composite
Stem Packing for 436: Teflon®*
/Hypolon
A
Special Note About Corrosion
Excessive corrosion may
result in leakage, glass
breakage, and premature valve failure.
Be sure all wetted components of the g auge are
constructed with materials compatible with the
service medium. John C. Ernst Co. does not
make chemical compatibility recommendations.
See the "Compass Corrosion Guide"
or
equivalent for material compatibility
Model
455 has an integral bonnet and stem seat.
Model 457 has a union bonnet for stem seat replacement.
Model 436 not all 316SS wetted parts.
Model |
Size
NPT |
Glass
OD |
Glass
Length from Centers |
Rod
Length from Centers |
436-04 |
1/2" |
5/8" |
-
2" |
-
1" |
436-05 |
3/4" |
3/4" |
-
2" |
-
1" |
446-04 |
1/2" |
5/8" |
-
2" |
-
1" |
446-05 |
3/4" |
3/4" |
-
2" |
-
1" |
455-04 |
1/2" |
5/8" |
-
1-3/4" |
-
2-1/4" |
455-05 |
3/4" |
3/4" |
-
1-3/4" |
-
2-1/4" |
455-06 |
1" |
3/4" |
-
1-3/4" |
-
2-1/4" |
457-04 |
1/2" |
5/8" |
-
1-3/4" |
-
2-1/4" |
457-05 |
3/4" |
3/4" |
-
1-3/4" |
-
2-1/4" |
457-06 |
1" |
3/4" |
-
1-3/4" |
-
2-1/4" |
Model |
Maximum
Liquid Pressure @ Temp
PSIG
/ °F |
Steam
Service PSIG |
Auto
Ball Checks |
436 |
500/100°F
to 500/425°F |
500 |
ASME |
446 |
500/100°F
to 500/425°F |
500 |
Yes |
455 |
600/100°F
to 345/400°F |
345 |
Yes |
457 |
600/100°F
to 345/400°F |
345 |
Yes |
For
Glass see Page 42.
For Shielded Gauges see Page
34. |