压力仪表标准精选(最新) G1226《GB/T 1226-2010 一般压力表》 G1227《GB/T 1227-2010 精密压力表》 G8892《GB/T 8892-2005 压力表用铜合金管》 G17764《GB/T 17764-2008 密度计的结构和校准原则》 G22052《GB/T 22052-2008 用液体蒸气压力计测定液体的蒸气压力 温度关系和 初始分解温度的方法》 G25112《GB/T 25112-2010 焊接、切割及类似工艺用压力表》 G26787《GB 26787-2011 焊接、切割及类似工艺用管路减压器安全规范》 G26788《GB 26788-2011 弹性式压力仪表通用安全规范》 G27504《GB/T 27504-2011 压力表误差表》 G27505《GB/T 27505-2011 压力控制器》 G30432《GB/T 3043
Dead weight testers are used for examination and calibration of pressure gauges and other pressure measuring instruments without using an external instrument. The main components are the measuring system, the valve units, the built-in screw pump for accurate pressure adjustment and the set of weights. The measuring system itself consists of a precise lapped-in pair of piston and cylinder. Dur