The FlowCal™ and FlowCal+™ 128 Series Y-body automatic flow balancing valve
is pressure independent and maintains a fixed flow rate as differential pressures
vary. It incorporates an exclusive flow cartridge made of an anti-scale, low noise
polymer. Constructed of DZR low-lead brass, FlowCal and FlowCal+ 128 Series
are ideally suited for flow rate balancing in plumbing applications such as hot
water recirculation systems and can also be used in hydronic applications. The
FlowCal+ 128 Series provides a built-in check valve to protect against circuit
thermo-siphoning. The outlet temperature gauge (optional) verifies the fluid
temperature in the circuit.