Levelstate - Model Type 202 - Electronic Drum Level Indicator - Manual

Boilers must have one gauge glass. Above 400psi operation two gauge glasses shall be provided. For boilers with safety valves set at or above 900psi two independent remote level indicators may replace one of the two gauge glasses. If both remote indicators are in reliable operation the remaining gauge glass may be valved off but must be maintained in serviceable condition. If gauge glasses are not visible to the operator two dependable Indirect Indicators shall be provided. The lowest visible level of the gauge shall be at least 2” above the lowest permissible water level where there is no danger of overheating any part of the boiler. Each water gauge glass shall be equipped with a top and bottom shutoff valve of through flow construction to prevent stoppage by deposits of sediment. Straight run globe valves shall not be used. Connections from the boiler to the remote level indicator shall be at least 0.75" pipe size including isolation valves. For gage glasses connected to the boiler the steam and water connections shall not be less than I" pipe size. There shall be no sag or offset in the steam pipe and no part of the water connection shall be above the point of connection to the gauge.