The First Choice in Secondary Valves

In an emergency the ability to rapidly shut-off fluid and vapor flow can mean the difference between a manageable situation and a potential disaster. For over 50 years Greenwood Quick Closing Valves have supplied that measure of safety.

These sturdy valves provide protection on pipelines and storage facilities in refineries, LPG, chemical, cement and power plants, shipyards, pumping stations, tank farms, and rail loading and unloading facilities throughout the world. As a secondary measure Greenwood Valves provide isolation until primary emergency valves are reset and system safety is restored. Process materials include ammonia, butane propane, pentane, polypropylene, LNG, NGL, mild acids, diesel fuel and hot oil.

Greenwood Quick Closing Valves use reverse check valve design to stop the flow of fluid or vapor in the event of emergency, be it fire, explosion or electrical disruption. Equipped with an external spring-assisted handle, closure is triggered by remote signal or alarm sent to electronic or pneumatic tripping devices. Fusible links which melt during a fire will allow quick closing. When resetting the valve to the normal open position, a proprietary internal relief valve breaks static pressure to help equalize pressure downstream.