... ,safe,reliable 5Patent production 1 HD25 model gas pressure regulator 1.1 The outside drawing 1.2 The ... Patent NO:ZL200820063920.8ApplicationGas pipeline network for high pressure, city gate station, District regulator station, industrial user, Gas supply systems ... gas pipeline network, direct-fired equipment etc.) 2.4 Pressure regulator station (used in gas transmission pipeline system, city gate ...