緊急釋放閥
EMERGENCY RELIEF
MODEL 2000A Emergency Pressure Relief Valve, Weight-Loaded
MODEL 2100 Emergency Pressure Relief Valve, Spring-loaded
MODEL 2400A Emergency Pressure Relief Valve, Weight-Loaded; Hinged
MODEL 2050A Emergency Pressure Vacuum Relief Valve, Weight-loaded
MODEL 2450A Emergency Pressure Vacuum Relief Valve, Weight-loaded; Hinged