This standard specifies materials, construction, performance and testing requirements for low-pressure single or two-stage regulators for use with liquefied petroleum gas mixtures in vapour phase up to 4.903kN/m² (0.711 PSI or 4.903mbar)[50gf/cm² or 500mm water column (WC) or 19.685inch WC] outlet pressure.

NOTE 1 Low pressure is considered to be any pressure below 6.894kN/m² (70.3gf/cm³ or 1.0 PSI or 68.947mbar). Domestic and commercial appliances normally operate at gas pressure of 2.942kN/m² (30gf/cm² or 0.427 PSI or 29.37mbar or 300mmWC or 11.811inch WC).

• Year of Declaration: 2025
• Reference:
• Number of Pages: 32
• Code: GYS 523
• Version: First Revision
• ICS Number: 23.060.40; 75.160.20