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English to Spanish translations [PRO] Tech/Engineering / differential pressure gauges
English term or phrase:minus / plus line
Check for dp gauges: close both valves at the pressure taps at the same time. The pointer must rest within the scale range. If pointer drops the plus line leaks or the balancing valve is still open. In case of rising pointer the minus line leaks. If the dp gauge shows no indication, close the minus line and open the plus line. In case the pinter doesn't move the instrment is damaged.