Secure-Gard™ Model 1049 for Petrochemical Industry

Secure-Gard™ Model 1049 for Petrochemical Industry

The Model 1049 Pilot Operated Vent Valve (POVV), while being balanced against outlet header pressure, has some operating restrictions relative to the ratio of the outlet header pressure to the set pressure. The reason is that in order for a pilot operated main valve to open, the actuator or �dome� pressure must be reduced sufficiently.�