Description of Asahi/American Type 57 Butterfly Valves.

Butterfly valves are named for the wing-like action of the flow-controlling disc, which operates at right angles to the flow. The disc has about the same diameter as the connecting pipe, and the flow is straight through with a low pressure drop. Maintenance is easy due to the small number of moving parts. The butterfly valve can be used either as an on/off or modulating type of valve.

The updated designed Asahi Type 57 Valve has no metal to media or environment contact whatsoever. These valves may be operated manually, electrically, or pneumatically. Features and Benefits:

Standard model has PVC body and PP disc for better chemical resistance at temperatures higher than can be achieved with PVC.
Asahi 316/403 stainless steel shaft has full engagement over the entire length of the disc and is a non-wetted part, totally isolated from the media.
Only solid and abrasion-resistant plastic disc and elastomeric liner are wetted parts.
ISO bolt circle on top flange—no body or stem modifications required for accessories.

New Design Features:
Flange Stopper. Prevents over-compressing liners due to improper installation.
Absorption Channel. Never worry about an over-tightened
Plastic Gear Operator. The first industrial, non-metallic gear box; offers superior corrosion resistance.

Available with or without bolt kits. Valves only (no bolt kits) are listed first.

Valves with Bolt Kits. Now you can purchase your valve with the appropriate bolt kit (ready for installation). Each kit includes appropriate size and quantity: Asahi Valve, Schedule 80 Van Stone flange slip, and Hex Head zinc coated bolts with washers. Call for stainless steel kits.