20 Liquid/Vapor ACME Valves All products are Pre-Applied with sealant on the inlet thread. Vapor Equalization Valve: 66.1206 Upper back check valve and lower excess flow valve combined. Other Items: 22 Multi-Service Valves 15 NH3 Applicator & Nurse Tank Valves 14 Relief Valves & Manifold – NH3 Service << Return to Items