Crane Noz-Chek latest design iteration: an even better choice for backflow prevention in critical service

The latest evolution of design improves upon the reliable performance of Noz-Chek, and delivers value to end users through reduced maintenance over the life of the valve.

Crane Noz-Chek is a non-slam axial check valve, specifically designed for fast-reversing systems where backflow is a constant concern. It is called a non-slam check valve, as the valve closes without slamming — meaning no excess pressure spikes are created. A Noz-Chek has a spring loaded, single low mass disc which facilitates a fast, dynamic response to reduction in flow. Reciprocating pump service and compressor surge protection are typical applications where the axial type check valve will outperform other valve types such as swing check.

The new Crane Noz-Chek Non-Integrated Diffuser design, uses the same proven Noz-Chek technology which customers have relied on for over 30 years to protect their equipment. Spring technology which has been independently certified to over 25 million cycles ensures long term performance, and the removal of any requirement for a soft seal means the potential for degradation in the seat to body seal over time is removed, while at the same time increasing the base operating temperature range of the standard product.

Reducing the number of components in the Noz-Chek design means that fewer long-term spares will be required in event of required refurbishment or inspection. The valve can be safely disassembled and then reassembled for cleaning or inspection, without the need for a replacement seat seal . Improved CVs over older designs reduce pump and compressor burden and helps to speed up processes where fluid throughput is important.