Sherwood USA Anhydrous Ammonia External Thread Valve

Sherwood USA valves are commonly used on pressurized containers of Anhydrous Ammonia.

Powell Valve Closure Systems (Shut Off Systems) are compatible with Sherwood USA Valves and with most other valves found on ton containers or 150 lb cylinders containing pressurized hazardous gases.

Powell Valve Closure Systems are superior to any other emergency shutdown system available on the market. Powell offers several brackets designed to adapt to a variety of valve types, making the systems compatible with an extensive list of hazardous gases.  Powell can design, engineer and test prototype brackets upon request.