Pneumatic Direct Acting Balance Retard Relay

The RL-243 Balanced Retard (BR) Relay is a pneumatic auxiliary device used to obtain special pneumatic signal outputs for use in a pneumatic control system. Standard applications include signal retarding, balancing action, and signal advancing. The relay can also be used to obtain several special control functions such as signal hesitation and pressure limiting.

The relay operates on a force-balance principal and is provided with a Powers’ two-valve design to assure stability and prevent unnecessary air consumption. Internal relief assembly prevents signal lock-up and assures fail-safe operation.

A single spring adjustment is provided to allow setting the relay for desired operation. The relay is also adaptable for flush panel mounting to facilitate manual readjustment if desired. Integral brackets facilitate mounting and allow the relay to be mounted in any position.

Application:

The balance retard relay can be piped and adjusted to obtain a number of different control characteristics. Typical applications where this relay can be applied include:

• Retard relay
• Balancing relay
• Hesitation relay
• Seasonal pressure limiting with dual pressure systems
• Minimum pressure and hesitation output relay