These Packed Wrench-Operated Valves are designed for anhydrous ammonia applications, including commercial refrigeration, metal treating and chemical manufacturing. Designed to ensure a safe, long, trouble-free life under all service conditions, they feature one-piece lead carbon steel, case-hardened, nickel-plated stem provides positive shut-off in corrosive gas service with exceptional durability. A one-piece PTFE packing promotes easy operation while providing a durable leak-resistant stem seal and meet CGA standards.