Vanaz R 2301 Industrial Gas Regulator for LPG or Natural Gas Vanaz R 2301 manufacturer and supplier first stage LPG industrial gas pressure regulator valve – PRV.These are suitable for gas trains, industrial furnaces, burners and boilers. Also Modified Models Available For Oxygen in Aluminium Bonnet, Brass Body & CS Bonnet For Carbon Dioxide, Brass Body For Medical Oxygen and Brass Bonnet For Ammonia in SS Trim.