Specifications / Parameters Model: HSR‑CHGBLYN Regulator type: Pressure reducing regulator, direct‑acting, with internal relief Body material: Cast iron End connections: 1″ NPT inlet/outlet (globe body style) Maximum operating inlet pressure: 125 psig (≈8.6 bar) Maximum emergency inlet pressure: 150 psig (≈10.3 bar) Outlet (regulated) pressure range: 12.5 to 20 inches w.c. (approx. 31 to 50 mbar) for one spring range; other available spring ranges include 4‑6” w.c., 6‑8” w.c., 8‑10” w.c., 10‑12.5” w.c., 12.5‑20” w.c., 20‑35” w.c., and 1.25‑2.2 psig (0.09‑0.15 bar) Maximum allowable outlet pressure differential (to avoid internal part damage): approx. 3 psig (≈0.21 bar) above setpoint Temperature capability: approx. –20 °F to +160 °F (≈ –29 °C to +71 °C) Orifice size / capacity guidelines: for orifice sizes from 1/8″ to 1/2″, the maximum operating inlet pressures vary (for example for a 1/8″ orifice: 125 psig / 8.6 bar; for a 1/2″ orifice: ~20 psig / 1.4 bar) Typical weight: ~4 lb (≈2 kg) Application: Fuel‑gas supply regulation in residential, multi‑dwelling, commercial or light industrial installations, meeting or exceeding ANSI B109.4 / CGA 6.18 standards.