JR Fibreglass Industries Pvt. Ltd. Manufactures Single Stage and Multi Stage Venturi Tubes. JR Fibreglass Industries Pvt. Ltd. Also offers Gas scrubbing system, fume extraction and scrubbing system, blower/ centrifugal fans, tank and vessels ducting and emergency scrubbing system for chlorine sheds. Single Stage and Multi Stage Venturi Tubes are a system for speeding the flow of the fluid, by constricting it in a cone-shaped tube and the gas is drawn into the throat of the venturi by a stream of absorbing liquid. The Single Stage and Multi Stage Venturi Tubes are generally used when a low pressure drop is required and where the liquid contains suspended solids. The Single Stage and Multi Stage Venturi Tubes can be used in a single stage countercurrent mode or multistage countercurrent mode by using several venturis.