The NIBCO? high performance lug style butterfly valve features a carbon steel body with stainless steel trim. It is ideally suited for commercial, industrial and mechanical HVAC services. The valve performs isolation and throttling services in heating hot water, condenser water, glycol, chilled water, compressed air, chemical process, and domestic water or steam (2″ to12″ 150 PSI; on/off 50 PSI modulating).