Witt NV150 gas non-return valves

Gas non-return valves are needed to prevent the dangerous backflow of gases and the formation of unwanted mixtures in plants and pipelines. The Witt NV150 is designed to meet this requirement with a compact ½″ fitting with minimal pressure loss and high flow capacity.

This device is about the size of a matchbox, at 60 mm long and with a diameter of 35 mm, and meets all the requirements of DIN EN ISO 5175-2 and protects systems featuring town gas, natural gas, acetylene, hydrogen, oxygen and non-flammable gases as well as compressed air.

Supporting low pressure operation, the NV150 offers an ultra-low opening pressure of 4 mbar, and the pressure drop in the line is therefore extremely low. In addition, the spring-loaded valve system has low noise emissions, and a high-quality sealing system with elastomers effectively prevents leaks.

The Model NV150 is designed to operate up to 70°C ambient temperature and 16 bar maximum operating pressure. Weighing in at only 221 g, this brass device can be mounted in any position and offers a very long service life due to its integrated 100-micron dirt filter. Versions in stainless steel and aluminium are also available.