Product Description Rain Bird Pressure Regulators Pre-set pressure regulator designed to provide a constant outlet pressure in micro irrigation installations. PSI-M series regulators hold outlet pressure at a pre-set level. Regulated outlet pressures are available from 20 to 50 psi / 1.45 to 3,5 bar. As either inlet pressure or flow changes, the outlet pressure remains relatively constant. Designed for above and below grade use. Available in 5 Sizes; 20 PSI, 1.45 Bar 0.45 – 5m/hr 25 PSI, 1.7 Bar 0.45 – 5m/hr 30 PSI, 2.1 Bar 0.45 – 5m/hr 40 PSI, 2.8 Bar 0.45 – 5m/hr 50 PSI, 3.5 Bar 0.45 – 5m/hr Features; Pre-set outlet pressure regulators female inlet and outlet Choice of 5 outlet pressures Diaphragm operated Use in above and below ground applications Manufactured from rugged engineering-grade plastic Stainless steel spring Pressure Range; 10-150 psi / 0,7-10,3 bar Flow Range; The PSI-M Medium Flow Regulators are recommended for most operating conditions. This series is design to withstand surges up to 100 psi / 6,8 bar greater than the rated outlet pressures, where high inlet pressures are combined with high flows. 2-22 gpm/ 0,5-5,0 m 3 /hr/lps/ 0.13-1.4