2020 Tech Report May-June

Task # 2.a.: Performing Float Switch Testing on Vessels with Drain Valve Configurations

ACTION

COMMENT

CAUTION: Failure to properly secure the end of the purge hose in a water container can lead to the hose coming free, whipping around, and possibly causing injury to personnel nearby, as well as allowing ammonia vapor to escape to the atmosphere directly. NOTE: A second barrel of water may become necessary should the first barrel become satu- rated with ammonia. CAUTION: The transfer hose will contain am- monia liquid. Exercise extreme caution. NOTE: Valve “Y” is the purge/drain valve on the transfer hose. Refer to the Transfer Hose Diagram on Page 3 of this Maintenance Procedure. CAUTION: Opening Valve “Y” on the transfer hose too fast or too far can cause ammonia and oil to splatter from the barrel of water. NOTE: Valve “X” is the gauge valve on the transfer hose. Refer to the Transfer Hose Diagram on Page 3 of this Maintenance Procedure. NOTE: Valve “Y” is the purge/drain valve on the transfer hose. Refer to the Transfer Hose Diagram on Page 3 of this Maintenance Procedure.

26.

Terminate and physically secure the purge hose attached to Connection “P” on the transfer hose in a barrel of water.

27. 28.

Slowly close Valve “C.”

Slowly throttle open Valve “Y” on the transfer hose.

29.

After all pressure is bled off, as evi- denced by a pressure reading of less than 2 pounds on the gauge installed in Valve “X” and a lack of bubbles in the wa- ter, continue. Close Valve “Y” on the transfer hose.

30.

RETA TECHNICAL REPORT PAGE 11