NCV

Superior air valve technology for reliable industrial and commercial solutions.

Incorrect check valve selection can aggravate surge and water-hammer in pipeline systems, resulting in what is known as “Check Valve Slam” causing transients which could exceed the pipeline’s working pressure by up to five times. Check valves can also be one of the biggest contributions to head loss within a pipeline, which in turn increases power consumption. Vento-O-Mat’s range of nozzle check valves addresses both these concerns by providing a *non-slam valve with a very low pressure loss.

The valve utlises a ring-shaped disc as the closing member. Rapid *slam-free closure is achieved utilising friction free helical springs and radial guides. Annular ring type nozzle check valves outperform center shaft nozzle designs (mushroom type) in respect of dynamic and head loss performance because of the low mass of the moving parts (ring shaped disc) and the superior pressure recovery capabilities inherent in the two-port annulus configuration.

Key
Features

Non-Slam Closure: The valve responds rapidly to changes in velocity, ensuring that the disc is at the point of closure before reverse flow occurs, preventing water hammer and surge.
Low Pressure Loss: In the open position, the annular disc forms two flow paths, increasing the volume of flow through the valve and minimizing pressure drop.
Short Closure Time: The short stroke length reduces the closure time, enhancing the valve’s efficiency.
Friction-Free Operation: Helical springs and radial guides allow the disc to move from open to closed positions with minimal resistance.
Tight Shut-Off: Achieved by metal-to-metal sealing, ensuring no leakage.
Durable Materials: Constructed from ductile iron with a two-pack epoxy coating for enhanced durability and corrosion resistance.