 SERIES TGC = TANK GUARD SIZE OF AIR INLET 1/4 = 1/4" (6.35 mm)-(35 cfm) SENSING TUBE MATERIAL U = PVC (REMOTE ONLY) M = MILD STEEL SENSING TUBE CONFIGURATION 1 = BUILT-IN (MILD STEEL ONLY) 2 = REMOTE (PVC ONLY) VALVE TYPE O = NORMALLY OPEN SENSING DIFFERENTIAL FP = FACTORY PRESET DIAPHRAGM MATERIALS BN = BUNA TF = TEFLON®-LINED BUNA |