STEAM PRESSURE GAUGE

This gauge is a scaled down version of the fine old flanged case gauge used in the age of steam.  It approximates 1 1/2” per foot and dresses up a boiler very nicely.  Available in 4 pressure ranges.  The gauges are calibrated to within 3% of full scale error on a master calibration gauge which is re-calibrated yearly.  The exception to this is at the very upper range of the gauge, where because of geometric problems caused by the very small size of the gauge, we are not always able to maintain this tolerance.  The gauge should be applied so that the normal pressure reading would be at about 1/2 scale.  A boiler running at 100# should have a 200# gauge installed.  A siphon for the gauge is an absolute must in steam service.  The gauge is not designed for service where rapid pulsation in pressure is encountered such as hydraulic service.  Siphons are listed on page 2.  Gauge is 1 1/4” in diameter, threaded 10-32.