Data Sheet

A31A Valve
D500191X012
Product Bulletin
21.1:A31A
October 2013
2
Specifications
Valve Sizes
(1)
NPS J 14, J 16, J 18, J 20, and J 24
Available Valve Configurations
J Flangeless (wafer) style or J single-flange (lugged)
controlvalvewithaone-piece valve body, a
two-component seal/backup O-ring, and a keyed
drive shaft
End Connection Style
J Flangeless style o r J single flange valve body
designed to fit between raised-face mating flanges
per ASME B16.5 CL150 or CL300
Valve Body 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 CL150
or CL300 raised-face flanges
Maximum Inlet Pressure/Temperature
(2)
Consistent with J CL150 and J CL300
pressure/temperature ratings per ASME B16.34. Also,
seefigure2foradditionalinformation
Available Seal Configurations
Seefigure1andtable1
Standard Construction Materials
See table 1
Disc Coating
Hardcoating (also see table 1)
JStandard when used with NOVEX seal or Phoenix III
seal.
Shaft Extension Lengths
J None required for temperatures less than 343_C
(650_F), J 152.4 mm (6 inches) for temperatures
from 343 to 538_C(650to1000_F), or J 304.8 mm
(12 inches) for temperatures above 538_C (1000_F)
Shutoff Classification per ANSI/FCI 70-2
and IEC 60534-4
Standard Soft Seal: Bidirectional bubble-tight shutoff
NOVEX Seal: Unidirectional shutoff MSS-SP61
(preferred flow direction only
(3)
), optional Class VI
Phoenix I II Seal: Bidirectional bubble-tight
Phoenix III Seal for Fire T ested Applications:
Shutoff per FCI 70-2 Class VI. Fire Tested per API 607
Rev. 4. Contact your Emerson Process Management
sales office for more information.
Flow Characteristic
Modified equal percentage
Flow Coefficients and Noise Levels
See Fisher Catalog 12
Available Actuators
Handlever, handwheel, or pneumatic piston
Disc Rotation
Clockwise (CW) to close
Valve Dimensions and Approximate Weights
See figures 5, 6, 7 and 8
Options
ENVIRO-SEALt PTFE or graphite packing system
provides improved sealing, guiding, and transmission
of loading force to control liquid and gas emissions.
See Bulletin 59.3:041 ENVIRO-SEAL Packing Systems
for Rotary Valves for more information.
Cryogenic extension and seal provides service down
to -234_C(-425_F). See Bulletin
21.1:Cryogenic-Rotary for more information.
1. The valve sizes listed in this bulletin refer to Nominal Pipe Size (NPS).
2. The pressure/temperature limits in this bulletin (figure 2), and any application code or standard limitation, should not be exceeded.
3. For optimum seal performance, the preferred valve orientation at shutoff is with the retaining ring downstream from the high pressure side of the valve.