Air-operated shutoff valve constructed of Grade 1, Type 1 Geon PVC with [Viton, EPDM Buna-N] seals, is to have clear acrylic cylinder for visual indication of valve position. Valve shall be air to close and air to open. Pipe connection size is [ 3/4", 1 1/4", 1 1/2", 2"] with 1/8" air connection. Valve shall have million cycle design with balanced PTFE shaft, Fail-Dry safety design incorporating a vented chamber between the main seal and upper seal, and be individually tested prior to delivery. As manufactured by Plast-O-Matic Valves, Inc., Cedar Grove, NJ.
ADD: With throttling Limit Stop (when appropriate).
REPLACE: "Air" with "hydraulic" when actuating with water.