Page 221 - Valve Selection Handbook
P. 221
208 Valve Selection Handbook
Figure 5-41. Pilot-Operated Pressure Relief Valve, Pilot Nonflowing Type, Snap
Action. Optional Pilot for Air, Gas, and Vapor Only, or for Saturated and
Superheated Steam, Maximum Set Pressure 1200 psig (82.8 barg), Maximum
Temperature 1000°F (538°C), Adjustable Slowdown, Remote Actuation and Dual
Pilot Option with Integral Selector. (Courtesy of Anderson, Greenwood & Co.)
Illustrations of pilot-operated pressure relief valves. Figures 5-36
through 5-41 show a cross section of the diverse range of pilot operated
pressure relief valves with direct-acting pilot, covering the wide field
from vacuum relief to high pressure and high temperature applications.
Accessories. Pilot-operated pressure relief valves may be provided with
additional accessories to provide additional functions. Others may be
used to assist in the successful operation of the pressure relief valve. The
following include a range of such accessories:
