Pressure independent Non-spring return Spring return

View Details Siemens 231-04322-6 231-04322-6, 3/4 PICV, 6 GPM 0-10V NSR NO  | Blackhawk Supply
$177.80 each
View Details Siemens B302FD-SA126.600 BFV 3W 2" 175PSI 24VAC 2 POS HTR CONFIG D  | Blackhawk Supply
$324.06 each
View Details Siemens 231-04322-8 231-04322-8, 3/4 PICV, 8 GPM + 0-10V NSR NO  | Blackhawk Supply
$324.06 each
View Details Siemens 231-04320-0.5 231-04320-0.5  1/2 PICV0.5GPM+0-10VNSRNO  | Blackhawk Supply
$324.06 each
View Details Siemens 230-04322-3.5 230-04322-3.5, 3/4 PICV, 3.5 GPM + 3P NSR NO  | Blackhawk Supply
$254.90 each
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