Cryogenic-Rotary Valve
Instruction Manual
Form 5482
February 2005
2
Table 1. Specifications
Available Valve Configurations
J Flangeless, wafer-style or J single-flange
(lugged) control valve with a one-piece extension
housing and either NOVEX seal (standard), Kel-F
seal (optional) or Kel-F seal with Aluminum
backup V-ring (optional)
Valve Sizes
J 3, J 4, J 6, J 8, J 10, J 12, J 14, J 16,
J 18, J 20, or J 24-inch
End Connection Style
J Flangeless, wafer-style or J single flange
valve body designed to fit between raised-face
mating flanges per ASME B16.5 Class 150 or 300
Maximum Inlet Pressure/Temperature
(1)
Consistent with ANSI Class J 150 and J 300
pressure/temperature ratings per ASME B16.34,
except that 38_C (100_F) rating is applicable to
-254_C (-425_F). NOVEX seal maximum
pressure/temperature rating is the same as the
valve body. See figure 2 for rating of Kel-F seal.
Valve Classification
Face-to-face dimensions are in compliance with
MSS SP68 and API 609 standards; valve bodies
are designed for installation between ASME
B16.5 Class 150 or 300 raised-face flanges
Materials of Construction
See Bulletin 21.1:Cryogenic-Rotary
Installed Valve Orientation
See figure 3 for orientation guidelines
Available Actuators
J Type 1035, J Bettis Pneumatic or J Type
1051/1052
Disc Rotation
Clockwise to close
1. The pressure/temperature limits in this manual, and any applicable code or standard limitation, should not be exceeded.
Description
The Type A31A Cryogenic Series C (3- through
6-inch Class 150 & 300 and 8-inch Class 150) High
Performance Butterfly Valve features either a double
D drive shaft to allow direct coupling to the Type
1035 actuator or keyed shaft (optional). The Type
A31A Cryogenic is a reliable, high-performance
butterfly valve for cryogenic applications.
The Type A31A Cryogenic is available in either a
flangeless (wafer) or a single-flange (lugged) valve
body style and a variety of seals.
The standard seal for the Type A31A Cryogenic
valve is the NOVEXt metal seal which provides
tight shutoff, low operating torques and the
ruggedness required for cryogenic service. Kel-f and
Kel-f/aluminum seals are also available.
Installation
WARNING
Always wear protective gloves,
clothing and eyewear when performing
any installation operations to avoid
injury.
To avoid personal injury or property
damage resulting from the sudden
release of pressure, do not install the
valve assembly where service
conditions could exceed the limits
given in this manual or on appropriate
nameplates. Use pressure-relieving
devices as required by government or
accepted industry codes and good
engineering practices.
Check with your process or safety
engineer for any additional measures
that must be taken to protect against
process media.
If installing into an existing
application, also refer to the WARNING
(12 Seiten)
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