ISO 23555-2:2022 pdf download – Gas pressure safety and control devices for use in gas transmission, distribution and installations for inlet pressures up to and including 10 MPa — Part 2: Gas pressure regulator. 6.7.1 General Subclause specific to this document. The main function of a regulator is to maintain the value of the controlled variable within its tolerance field irrespective of the disturbance variables. Regulators shall not have any continuous discharge of gas into the atmosphere. However, temporary discharges from auxiliary devices can occur. Regulators shall be so designed that the external tightness and internal sealing meet the requirements...