Series 396/397 Spec Sheet
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Series 396/397 General Service Rubber Seated Butterfly Valve Specifications
Valves shall be of the wafer (or lug wafer) design for installation between ANSI B16.1 125# flanges. All valves shall be capable of bi-directional, bubble tight service to the rated pressure. Valves shall be Pratt Series 396/397 or approved equal.
2” through 12” – 200 psi
14” and larger – 150 psi
The valve body shall be cast iron ASTM A-126 Class B. Laying length shall conform to MSS-SP67, latest revision.
Valve disc shall be epoxy coated ductile iron ASTM A-536 Grade 65-45-12 (or 316 stainless steel or aluminum bronze).
Valve shaft shall be stainless steel type 416.
Seat shall be EPDM (or Buna-n or Viton). Seats shall be located in the valve body.
Shaft seal shall be self adjusting V-type and shall be suitable for pressure or vacuum service.
All valves shall be leak tested in the factory at their rated pressure.