Nebraska Administrative Code
Topic - ENVIRONMENT AND ENERGY
Title 195 - CHEMIGATION REGULATIONS
Chapter 3 - EQUIPMENT; STANDARDS, INSTALLATION, MAINTENANCE
Section 195-3-006 - Chemical injection line check valve
Current through March 20, 2024
The chemical injection line check valve is to be located between the point of chemical injection into the irrigation pipeline and the chemical injection pump.
006.01 The valve is to be constructed of chemically resistant materials;
006.02 The valve is to be designed to prevent irrigation water under operating pressure from entering the chemical injection line; and
006.03 The valve is to be designed to have a minimum opening (cracking) pressure of ten psi. When the chemical injection pump is shut down, the valve must prevent any leakage from the chemical supply tank.
006.04 As an alternative to the minimum opening pressure requirement in 006.03 above, a vacuum relief valve may be placed in the injection line between the chemical injection line check valve and chemical injection pump. The vacuum relief valve is to be constructed of chemically resistant materials, is to open at atmospheric pressure, is to be at an elevation greater than the highest part of the chemical supply tank and is also to be the highest point in the injection line.
