Page 281 - Valve Selection Handbook
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268 Valve Selection Handbook
Figure 7-5. Capacity Correction Factor K p for Pressure Relief Valves in Liquid Service
that Requires an Overpressure of 25% to Open Fully. At an Overpressure Lower than
10%, There Is a Heightened Possibility of Valve Chatter. (Reprinted from API RP 520
Parti, 6th Edition, March 1993, Courtesy of American Petroleum Institute.)
Figure 7-6. Capacity Correction
Factor KW for Bellows Balanced-
Pressure Relief in Liquid Service
that Requires an Overpressure of
25% to Open Fully. For Values of
KW for Pressure Relief Valves that
in Liquid Service Open Fully
within 10% Overpressure, Consult
Manufacturer. (Reprinted from
API RP 520 Part \, December
1976, Courtesy of American
Petroleum Institute.)
