Fixed or adjustable gasorifice, primary air shutter and mounting boss. Heavy cast iron construction. Simple to install and to maintain.
固定的或可调的燃气孔板，主空气调节挡板，重铸铁结构，容易安装和维护都是该产品的特点。
2
The on the spot inspection of natural gasorifice meter is adopting the transitivity calibration method taking Venturi nozzle as calibration scale.
天然气孔板流量计的现场检定，采用以文丘里音速喷嘴作为标准表的传递型校准法。
3
Full set of pipe orifice, valves, flanges and counter flanges, fasteners and all other attachments, all water release valves, gas release valves and safety valves.