A31A

POSI-SEAL® A31A is a high-performance butterfly valve featuring a keyed shaft for on-off service.  A31A is available in NPS 14 through 24, CL150 and CL300. This valve is available in either a flangeless wafer-style design, or a single-flange (lugged) body. The Cryogenic version  of this valve is available in NPS 3 through 24.

A31A

Features

  • Developed as a valve/actuator packing with a double D drive shaft to allow easy, direct mounting to a rack and pinion actuator, eliminating the need for external coupling systems.
  • Concentric rotation ensures that the valve disk remains in the closed position, even in the event of line pressure surges or actuator failure.
  • The torque necessary to open and close the valve is the same, regardless of the direction in which the differential pressure is applied.
  • Interchangeability of all parts, including shafts and disks, simplifies service and reduces maintenance costs.
  • Seal retainer screws are located so there is no interference with the sealing function of either flat sheet or spiral-wound line flange gaskets.
  • The valve body self-centers on the line flange bolts as a fast, accurate means of centering the valve in the pipeline.
     
A31A
A31A Cryogenic
Lever-Lock Actuator Bulletin Instruction Manual
M Series Manual Handwheel
1035
FieldQ