Section 195-3-006 - Chemical injection line check valveThe 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; and006.03 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.195 Neb. Admin. Code, ch. 3, § 006
Amended effective 6/24/2019Amended effective 12/10/2019Amended effective 4/19/2020