FLOWSEAL Metal Seat Valve
The FLOWSEAL metal-to-metal seat high performance butterfly valve incorporates an inconel seat for higher tensile strength, a 300 series stainless steel back-up ring in the seat cavity for axial seat support, and a disc that is case hardened by nitriding. The inconel seat, by its dynamic and flexible design, applies enough force per linear inch against the disc edge (rockwell hardness of C68 to C70 ) to obtain an optimum sealing characteristic while controlling the loads between the metal surfaces.

The FLOWSEAL metal-to-metal seat valve is utilized for temperatures up to 900oF, in compliance with ANSI b16.34 pressure/temperature specifications. Leakage is restricted to class IV per ANSI FCI 70-2.

Free Valve Sizing

 

 

 

Seal Variations
Lower Packing Variation (Above)

The ANSI 150 30" through 48"; ANSI 300 14" through 30"; ANSI 600 10" through 16" sizes feature a two-piece shaft design which utilizes a lower packing seal in the valve body to prevent external leakage. The component parts are of the same design used in the packing assembly in the top of the valve body. 

 End Seal Variation (Above)

The ANSI 150 14" through 24" sizes feature a two-piece shaft design. The lower shaft utilizes an end seal in the body to prevent external leakage. the component parts include an end seal, an end cap, and end cap bolts. 

© Pneumatic Control, Inc. 1999/2000