Normally Closed (NC)

A Normally Closed (NC) version of the ASCO Series 316 valves refers to a type of valve that is in a closed state in the absence of an electrical signal to the pilot operator. In other words, when the pilot operator is not energized, the valve restricts the flow of fluid. When an electrical signal is applied to the pilot operator, it causes the valve to open and allow fluid to flow freely through it.

The Normally Closed version of the ASCO Series 316 valves is typically used in applications where fluid flow needs to be allowed when an electrical signal is applied to the pilot operator. For example, in a pneumatic system, a Normally Closed valve might be used to control the flow of compressed air to a cylinder, closing to stop the flow when the pilot operator is not energized and opening to allow air to flow when the pilot operator is energized.

The ASCO Series 316 valves have two floating diaphragms and a direct lift pilot operator with a resilient soft seating, which helps to ensure absolute tight shut off when the valve is in the closed state. The venting to 0 BAR feature helps to ensure reliable operation, even at high flow rates and under heavy load conditions.

In summary, the Normally Closed (NC) version of the ASCO Series 316 valves is a type of valve that restricts fluid flow in the absence of an electrical signal to the pilot operator, and allows fluid to flow freely when an electrical signal is applied.