? 2003 Johnson Controls Inc. Catalogue Section 7 Code No. PD-V46-E PSC9723 Series V46 Pressure Actuated Modulating Valves Introduction These pressure actuated modulating valves control the quantity of water to a condenser by directly sensing pressure changes in a refrigerant circuit. The valves can be used in non-corrosive refrigerant systems. Ammonia power elements and valves designed for salt-