... tube,it is unnecessary to stop the main pipeline flow(equip with stop valve);This series flow meter adopt to the principle of differential ... main pipeline,main orifice,shunt pipeline,throttling orifice,rotameter and stop valves (optional).See Figure 1. As reference;LZB-()FL ... with DN10 flowmeter,with small structure,stop valve is optional;LZB-()FL/G series adopt to thread connection.Which can measure ...