This Standard Practice applies to valves for gen-eral liquid and gas service that effect valve closure by means of a resilient diaphragm sealing against a weir or a diaphragm acting in conjunction with a separate or integral disk-member sealing against a seat, having equal sealing capability in either flow direction, and having diaphragms being essentially made of elastomeric or plastic material or combinations thereof.
Price: $116.00 - $232.00
This Standard Practice defines the following categories of valves:
a) Class 125 or 150 Valves;
b) Standard Valves;
c) Valves for Special (Low Pressure) Applications.
The purchaser, when referencing the Standard, shall also specify the appropriate category as listed above.
This Standard Practice covers the following:
a) Pressure-Temperature Ratings and Design requirements;
b) Commonly Used Diaphragm Pressure Limitations;
c) Body, Bonnet, and Bolting Materials;
d) Commonly Used Face-to-Face Dimensions for Flanged Valves;
e) Body End Connections and Wall Thicknesses;
f) Actuator Application Requirements;