426-RAJH – Diaphragm & Seal Kit, 426, BUNA/-JH

The AqMatic 426-RAJH Diaphragm & Seal Kit is a complete rebuild kit for 426-series diaphragm valves, designed to replace the diaphragm and sealing components in a single maintenance cycle.

This kit uses Buna-N (JH configuration) elastomer, which is commonly selected for water treatment and general industrial applications due to its durability and resistance to oils and heat. Buna diaphragms are widely used in diaphragm valve systems because they provide consistent sealing performance under repeated cycling.

The 426 platform is typically used in larger V42-series valves such as 2-inch and 2-1/2 inch configurations, where maintaining proper diaphragm response and sealing is critical for system performance.

This kit restores proper valve operation in systems experiencing leakage, delayed actuation, or inconsistent cycling. It is commonly installed during scheduled maintenance or when internal wear affects valve performance.

It is typically used in systems that include V42 diaphragm valves and operate under automated sequencing through stagers.