BY –PASS GLASS TUBE ROTAMETER BY – PASS METAL TUBE ROTAMETER The simplest & most common flow meter is a fixed Orifice in a pipeline. This Orifice creates a pressure differential (i.e. pressure drop) which is proportional to flow. But the flow rate versus differential pressure is a square root function, thus at the high end of the scale the graduations are far apart and very easy to read. At the low end of the scale, the graduations are so close together that reading becomes impossible. The net result is a meter with only a 3 OR 4 to 1 usable range. The limited rangeability of this type of meter can be overcome by adding a bypass leg around the Orifice, which has a pressure drop equal to the drop across the Orifice and bypassed flow is directly proportional to the mainline flow. This results in a meter, which has a linear function and not a square root. Since the flow meter has a 10 to 1 range, the Orifice meter will now have a 10 to 1 linear flow range, which is as easy to read at the bottom as the top of the scale. This principle can be used virtually any pipeline size, handling almost any flow rate and metering either liquid OR gas. It is one of the most versatile meters available. Its only limitation is that the solid particles OR slurries can clog the Orifice and prevent proper operation. .

The Bypass flow meter consists of a mainline Orifice plate, a set of Orifice Flanges Or a carrier ring, a flow meter, range Orifice, Bypass piping with Isolation Valves. (i) Mainline Orifice Plate:- The purpose of the mainline orifice plate is to create the pressure differential. As the flow rate varies across this mainline orifice, the pressure differential across this plate also varies and it is this variation, which makes the meter function. (ii) Orifice Flanges / Carrier Ring:- Orifice flanges / carrier rings serve two functions. First, they hold the mainline orifice plate in the proper position...

MATERIALS OF CONSTRUCTION Mainline Orifice Plate : 316SS, 304SS, P.P. Orifice Flange / Carrier Ring : M.S., 316SS, P.P. Bypass Piping with Isolation Valves : M.S., 316SS Glass Tube Rotameter: -Tube Float Packing End Fitting Frame & Cover Metal Tube Rotameter:-Tube Float Packing End Fitting Borosilicate Glass SS 316, PTFE, others on request Neoprene, PTFE, Silicon, Viton M.S., C.S., SS304, SS316, CF-8M, CF8, C.I. PTFE Lined, SS PTFE Lined, PVC, others on request : M.S. OR SS SS 316, PTFE, others on request SS 316, PTFE, others on request Neoprene, PTFE, Silicon, Viton M.S., C.S., SS304, SS316,...

CAPACITY TABLE - GLASS / METAL TUBE BY PASS ROTAMETER FOR GASES

FLOWTECH MEASURING INSREUMNTS PVT. LTD. AN ISO 9001: 2015 COMPANY Works : 900/2/B, GIDC, Makarpura, Vadodara - 390010. Gujarat (India) Website : www.flowtech-instruments.com,www.flowtechinstruments.in Exporters to : BANGLADESH - DUBAI - EGYPT - FRANCE - INDONESIA - KUWAIT - MALAYSIA -NEPAL NIGERIA - POLAND - SARJAH - SINGAPORE - SRI LANKA - SOUTH AFRICA - THAILAND Local Dealers : AHMEDABAD - ANKLESHWAR - BHOPAL - CHENNAI - GANDHIDHAM HYDERABAD - INDORE - MUMBAI Note : DOING ONLINE CALIBRATION OF FLOWMETER SIZE 40 NB TO 300 NB THROUGH HIGH ACCURACY ULTRASONIC FLOWMETER AT SITE ON REQUEST.