Introduces the features and characteristics of the Apollo RP4A reduced pressure valve and installation, operation and maintenance methods.
The document serves as a comprehensive guide for the Apollo RP4A Reduced Pressure Principle (RP) Backflow Preventer, covering sizes from 1/2" to 2". It details the device's description and operation, including its components like check valves and a pressure differential relief valve. The guide specifies that a minimum supply pressure of 20 psig is normally required for full operation.
| Size Range | 1/2" - 2" |
|---|---|
| Minimum Supply Pressure | 20 psig |
| Minimum Pressure Across Check Valve 1 | 5 psi |
| Minimum Pressure Across Check Valve 2 | 1 psi |
| Minimum Zone Pressure Differential | 2 psi |
A minimum supply pressure of 20 psig is normally required to fully shut the relief valve and open both checks.
The device must be installed in the horizontal position.
Apollo lubricant, DOW 111 or equal is recommended for assembly.