Norgas Controls and Metering VE1000-VL0500 Vent Limiter NGR Series NGR-VL

The Norgas Controls and Metering VE1000-VL0500 Vent Limiter NGR Series NGR-VL regulates internal diaphragm pressurization releasing in gas pressure regulators for HVAC systems. Threaded into the regulator vent port, the precision orifice limits atmospheric gas discharge during rapid diaphragm movements while maintaining normal pressure sensing. Reducing the need for external vent lines simplifies mechanical piping arrangements in indoor gas train installations. Controlling relief flow during pressure surges preserves internal calibration, maintains stable downstream gas pressure, and supports reliable combustion burner performance under changing line pressure conditions.