Shut-off valve The NLD/NTD with leak detector is a single-seat valve of hygienic design with pneumatic control. It is designed to detect product leakage in the event of a valve seal malfunction.
The principle of operation
Management the valve it is carried out by a pneumatic drive.
The valve is supplied with a single-acting actuator in the NC position (normally closed), so in the event of a failure of the compressed air supply, the valve will return to a safe position (the valve will close).
The detector the leak is installed in the NO position (normally open) in order to ensure that when valve open it could remove the product to the outside, thereby warning of leakage.
The stem has two seals, between which a security camera or detection camera is formed, which has a direct connection to the external atmosphere through a leak detector.
When compressed air is supplied (to open the valve), this air is also