VG1241FR+958GGC 2"2WBALLVALVE29.2CV Johnson Controls Description_SS Globe Valves 2 port 100BASE FX (single mode) switching hub 4539 010 Number_Number 4 1 1 4 PVC 2 port 100BASE FX (single mode) switching hub with SC connectors UL864 Models that close on a pressure increase are used on steam unit heaters to avoid blower operation when steam pressure is below the point required for adequate heating
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