... light,handy structure 2.sensitivity adjustment,easy installation 3.adjustable valve is optional 4.DN3,4,6,10 Company profile: ... ( )WB series variable area flowmeter is equipped with a needle valve in the base to facilitate precise setting of gas and ... Details:Vicky LvSales ManagerChangzhou Chengfeng Flowmeter Co.,LtdNo.15,Tongjia Industrial Park,Changzhou,Jiangsu Prov.,ChinaTel:86-519-85327611 Mob:86 ...