By Pass Rotameter

By-pass rotameters are suitable for economical measurement of flow in larger pipelines generally 2" NB to 14" NB. By-pass rotameters’ construction is simple and reliable consisting of orifice plate with carrier ring and a shunt rotameter. The flow rate through the rotameter is proportional to the pressure drop across the orifice plate created by the main flow and is calibrated accordingly. During installation care should be taken to ensure laminar flow in the pipe section. Orifice plate dimensions are based on ISA/ ISO/BS standards.

By-Pass Rotameter Flow Range & Dimension Table

Model No	Size NB	Maximum Flow Range		Carrier Ring	O.D MM
		Water m³/hr.	Air Nm³/hr.	O.D MM	Thickness mm.
RMB-40	40	16	480	85	32
RMB-50	50	25	750	104	-
RMB-65	65	35	1000	122	-
RMB-80	80	40	1200	136	-
RMB-100	100	90	2700	174	38
RMB-125	125	130	4000	196	-
RMB-150	150	150	4500	222	-
RMB-200	200	325	10000	278	-
RMB-250	250	560	17000	338	40
RUB-300	300	840	25000	408	-
RMB-350	350	1150	35000	450	-