This document provides specifications, engineering data, and installation instructions for Flow Line Series 72 (Wafer) and 73 (Lug) cartridge seated…
The Flow Line Series 72 and 73 are heavy-duty PTFE cartridge seated butterfly valves available in sizes from 2 to 24 inches. They feature a streamlined 316 stainless steel disc, oversized shafts with triple seals, and a pressure-responsive sealing mechanism that eliminates the need for gaskets or O-rings on flanges.
These valves are constructed with cast iron, ductile iron, carbon steel, or 316 stainless steel bodies coated in heavy-duty polyester. The design allows for full field replacement of the cartridge seat assembly and includes options for various disc coatings (Kynar, Haylar, PTFE) to suit different media requirements.
| Valve Sizes | 2 - 24 inches |
|---|---|
| Body Materials | Cast Iron, Ductile Iron, 316 Stainless Steel, Carbon Steel |
| Disc Material | 316 Stainless Steel |
| Seat Materials | PTFE / EPDM, PTFE / Viton, PTFE / Buna N |
| Shaft Material | 316 Stainless Steel or 416 Stainless Steel |
| Flange Compatibility | ANSI 125/150 |
| Pressure Rating (PTFE Lined) | 150 psi |
No, the large flange seal area assures no leakage when used with lined or unlined flange mating services. There is no need for gaskets or o-rings.
No, regular maintenance or lubrication is not required as factory assembly procedures provide adequate lubrication for the life of the valve.
All products manufactured by Flow Line Valve and Controls are warranted against defects in material and workmanship for a period of 2 years.