Function
Product Range
Technical
Specifications
Performance
Technical
specifications
of insulation
Caleffi 142 series low lead manual balancing valves are used to measure and adjust
the fluid flow rate in hydronic or plumbing circuits. Characterized flow plug which
provides precise system balancing valves and highly accurate flow compared to
other setters with ball valve control. Turning the knob moves a plug within the fluid
stream which varies the flow rate. The flow rate is determined according to the
pressure drop value measured by a differential pressure meter connected to the
pressure test ports, included. The flow rate is directly determined from the pressure
differential created across the two test ports as fluid passes the adjustment plug. The
valve design is variable orifice with pressure ports located upstream and downstream
of the adjustment plug. Compared to fixed orifice designs where both test ports are
located upstream of the adjustment plug, for a given size and flow rate, the variable
orifice design produces a greater differential pressure value. In very low flow rate
applications and with good fluid quality, this larger differential pressure signal can
result in more accurate balancing. A memory stop feature allows the valve to be
closed, and later reopened to the original set position. Insulation shells are available,
purchase separately.
Material: Body:
DZR low-lead brass
Bonnet:
DZR low-lead brass
Control stem:
DZR low-lead brass
Hydraulic seals:
peroxide-cured EPDM
Knob: PA6G30
Pressure test ports:
DZR low-lead brass body, EPDM seal elements
NSF/ANSI 372-2011, Drinking Water System Components-Lead Content
Reduction of Lead in Drinking Water Act, California Health and Safety Code
116875 S.3874, Reduction in Drinking Water Act, certified by ICC-ES, file
PMG-1360.
Suitable fluids:
Water and glycol solutions
Max. percentage of glycol:
50%
Maximum working pressure:
232 psi (16 bar)
Working temperature range:
14–250°F (-10–120°C)
Accuracy: ±15%
Number of adjustment turns:
4
Number of regulating positions:
8
Connections: Main: 1/2”–2”
NPT female
Valve body pressure test ports:
1/4“ NPT female
Material:
EPP
Thickness:
½ inch (15 mm)
Density:
2.8 lb/ft
3
(45 kg/m
3
)
Thermal conductivity (ISO 2581): - at 50°F (10°C): 0.257 BTU·in/hr·ft
2
·°F (0.037 W/(m·K))
Working temperature range:
23 - 250°F (-5 - 120°C)
Variable Orifice Balancing Valve
18204.02
www.caleffi.com
© Copyright 2018 Caleffi
142
241A
1/2” NPT Female
142
251A
3/4” NPT Female
142
261A
1” NPT Female
142
271A 1
1/4” NPT Female
142
281A 1
1/2” NPT Female
142
291A
2” NPT Female
Insulation code:
CBN142241A
CBN142251A
CBN142261A
CBN142271A
CBN142281A
142
Cv
3.4
5.0
7.5
12.9
16.8
22.0
1
