Z56P - Z-one 2-Way Zone Valve w/ Screw Terminals - 1" PressCaleffi Z56P Z one 2 Way Zone Valve w Screw Terminals 1" Press Features Two way zone valve with Presscon fitting Spring return. Normally closed actuator. Auxiliary micro switch. Overall length: 5" Lay length: 3 3 4" Max body pressure: 300 psi Temp range: 32 240 Suitable fluids: water, 50% max glycol, 15 psi max steam Power Supply: 24 VAC Power Consumption: 5 W, 7 VA Rating of auxiliary micro switch contacts: 0. 0 A min, 0. 4 A max 24 V (24 V only)