Product Overview

Advantages of balanced circuits
Balanced circuits have the following principal benefi ts:
1. In hydronic applications, the system emitters operate properly
saving energy and providing greater comfort.
2. In plumbing applications such as hot water recirculation, water is
not wasted when there is a call for hot water from a fi xture.
3. Circuit pumps operate at maximum effi ciency, reducing the risk of
overheating and excessive wear.
4. High fl uid velocities which can result in noise, erosion and abrasion
are avoided.
5. The differential pressures acting on the circuit control valves are
reduced preventing faulty operation.
Operating principle
The 142 series balancing valve is a hydraulic device that controls the
fl ow rate of a fl uid. Turning the knob moves a plug within the fl uid stream
which varies the fl ow rate. The fl ow rate is determined according to
the pressure drop value measured by a differential pressure meter
connected to the pressure test ports and the adjustment knob position.
Construction details
Adjustment knob
The knob is made of a reinforced high strength corrosion-resistant
polymer. The shape of the knob is designed to ensure maximum
comfort for the operator and an accurate adjustment.
Adjustment reference scale
Each 360° rotation of the knob moves the turn indicator by one position,
ranging from 0 (valve closed) to 4 (valve fully open).
OPEN
CLOSE
RESET ON OFFBT OFF
Measuring
probe
Safety
cap
Seal
OPEN
CLOSE
RESET ON OFFBT OFF
Memory stop
After adjusting the fl ow rate, insert a 2.5 mm hex key in the hex hole,
fully turn it clockwise without forcing it. This sets the valve's maximum
stroke position. If necessary, it is possible to shutoff the balancing valve
by turning the adjustment knob fully clockwise manually. To restore
the valve to the pre-set position, turn the adjustment knob fully counter-
clockwise.
Fast-coupling pressure test ports
The 142 series balancing valve has as standard probe type, fast-
coupling pressure test ports. The probe from the differential pressure
meter is inserted into the port packing, until the end of the probe enters
the system. When the measuring probe is pulled out, the test port
automatically closes, preventing fl uid leakage. Care should be taken to
pull the probe out slowly so as to allow adequate time for the packing
to re-seal – otherwise fl uid can quickly escape creating a hazardous
situation. Consult differential pressure meter manufacturer instructions for
proper use of instrument and pressure port couplings.