The PWV40I control valves are single seated, two-way body constructed with in-line straight connections. The PA pneumatic actuator is composed of a rubber diaphragm and multi springs. Its action can be DA – direct action (air to close) or RA – reverse action (air to open). The PWV40I valves have been designed to assure accurate control in any process condition. Their wide application ranges allow the use of this valve with the most common process fluids such as water, superheated water, steam, air, gas and other non-corrosive fluids.