1/4 In Carbon Steel Straight Gauge Siphon ("Pig Tail"), 1098S-1/4 (ASTM A-106 Seamless Steel, Grade A)
1/4 In Carbon Steel Straight Gauge Siphon, Ashcroft 1098S-1/4 (ASTM A-106 Seamless Steel, Grade A); Capacity: 333 PSI @ 1000°F to 3000 PSI from -0° to 400 °F
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In order to prevent live steam from entering a pressure gauge Bourdon tube, a gauge siphon ("pigtail") filled with water should be installed between the gauge and the process line. If freezing of the condensate in the loop of a siphon is a possibility, a diaphragm seal should be used to isolate the gauge from the process steam. Also use siphons whenever condensing hot vapors (not just steam) are present.