Flowseal® High Performance Butterfly Valves

 

Pressure and Temperature


Soft Seat

As temperature increases, the pressure retaining capability of materials decreases. The graph below illustrates the pressure/temperature ratings of the Flowseal ASME Class 150, Class 300, and Class 600.


The heavy lines define the ratings of the carbon steel and stainless steel valve body (or “shell”) in conformance to ASME B16.34. The shaded areas define the ratings of the TFE and RTFE Seat materials.


Seat ratings are based on differential pressure with the disc in the fully closed position.*


Steam Service


TFE seated valves are rated for 50 psi saturated steam.


Valves with “O” seat configuration (RTFE seat / AFLAS O-ring) are rated to 100 psi steam service.


Flowseal HPBV Pressure Temperature Ratings Soft Seat


*Shaft materials other than 17-4 PH or Monel® will affect working pressure ratings. Please consult factory.


Metal Seat

As temperature increases, the pressure retaining capability of materials decreases. The graph below illustrates the pressure/temperature ratings of the Flowseal ASME Class 150, Class 300, and Class 600.


The heavy lines define the ratings of the carbon steel and stainless steel valve body (or “shell”) in conformance to ASME B16.34. The shaded areas define the ratings of the metal seat.


Seat ratings are based on differential pressure with the disc in the fully closed position.


Flowseal HPBV Pressure Temperature Ratings Metal Seat

Fire Flow

As temperature increases, the pressure retaining capability of materials decreases. The graph below illustrates the pressure/temperature ratings of the Flowseal ASME Class 150, Class 300, and Class 600.


The heavy lines define the ratings of the carbon steel and stainless steel valve body (or “shell”) in conformance to ASME B16.34. The shaded areas define the ratings of the soft seat.


Seat ratings are based on differential pressure with the disc in the fully closed position.


Flowseal HPBV Pressure Temperature Ratings Soft Seat

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