Pressure regulating valve, Max-Flow Gas Regulator - BTLP 66: Brightechâ„¢ Max-Flow a Self-actuatingPilot Operated Type, Cage Guided, Double Seated, Low Down-Stream Pressure Control Valve (LPRV) suitable for many types of fluid control. Due to large Actuating Area (Diaphragm Area) the down stream pressure is precisely controlled even at low pressure settings