Where pressure reducing valves are used in a system, the following requirements shall be met:
A. If the piping equipment on the low pressure side has not been designed for the full initial pressure, one or more relief or safety valves shall be provided on the low pressure side of the reducing valve; 1. The relief or safety valves shall be located, adjoining, or as close as possible to the reducing valve. Proper protection shall be provided to prevent injury or damage caused by the escaping fluid from the discharge of relief or safety valves that are vented to the atmosphere.2. The set point, in PSI, shall be no higher than the design pressure of the system on the low pressure side of the reducing valve.B. If a bypass is used around the reducing valve, a safety valve is required on the low pressure side and shall be of sufficient capacity to relieve all the fluid that can pass through the bypass without over pressuring the low pressure side.C. The combined discharge capacity of the relief valves or safety valves shall be such that the pressure rating of the lower pressure piping shall not be exceeded in case the reducing valve sticks open.D. A pressure gauge shall be installed on the low pressure side of a reducing valve.229 Neb. Admin. Code, ch. 4, § 003
Amended effective 8/7/2016.