The BERMAD model 400Y-7PM utilizes an elastomeric deluge valve with unique Vulcanized Radial Seal Disk (VRSD) technology, designed specifically for advanced fire protection systems and the latest industry standards.
The Double Interlock Pre‑Action is suitable for use in systems requiring that water be kept out of the sprinkler piping until two fire detection devices have simultaneously reacted.
Pneumatic-Pneumatic Double interlock systems include automatic sprinklers attached to a supervised dry sprinkler piping system and a supplementary pneumatic pilot detection line.
The 400Y-7PM admits water into the sprinkler system piping only when there is a simultaneous loss of pneumatic pressure in both the pneumatic pilot detection line and l system pneumatic pressure.
An anti-flooding feature is provided by using an in-line check valve, which creates an intermediate vented chamber using a Normally Open drip check.