Product Overview

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01250/15 NA

Balancing valve,

variable orifice

142 series

Product range

142 series Variable oriﬁce balancing valve sizes 1/2”, 3/4”, 1”, 1 1/4”, 1 1/2”, and 2" NPT female

CALEFFI

Dimensions

Technical specifications

Materials

Valve

Body: DZR low-lead brass

Bonnet: DZR low-lead brass

Valve adjustment plug: DZR low-lead brass

Hydraulic seals: EPDM

Adjustment knob: PA6G30

Pressure test ports: DZR low-lead brass body, EPDM seal elements

Reduction of Lead in Drinking Water Act Compliant: 0.25% Max.

weighted average lead content. Reduction of Lead in Drinking Water

Act Certiﬁed by IAPMO R&T.

Performance

Suitable Fluids: water, glycol solutions

Max. percentage of glycol: 50%

Max. working pressure: 232 psi (16 bar)

Working temperature range: 15 - 250°F (-10–120°C)

Accuracy: ±15%

Number of adjustment turns: 4

Threaded connections: 1/2”– 2" FNPT

Insulation

Materials: EPP

Thickness: ½ inch (15mm)

Density: 2.8 lb/ft³ (45 kg/m³)

Thermal conductivity (ISO 2581):

- at 50°F (10°C): BTU · in/hr · ft² · °F (0.037 W/m · K))

Working temperature range: 23 - 250°F (-5 - 120°C)

Reaction to ﬁre (UL 94): Class HBF

ISO 9001 No. 0003

ACCREDITED

ISO 9001 FM 21654

Function

Caleffi 142 series low lead manual balancing valves are used to

measure and adjust the fluid flow rate in hydronic or plumbing

circuits. Turning the knob moves a plug within the fluid stream

which varies the flow rate. The flow rate is determined from the

pressure drop created across the two test ports as the ﬂuid passes

the adjustment plug. The pressure drop value is measured by a

differential pressure meter connected to the pressure test ports. The

valve design is variable oriﬁce with pressure ports located upstream

and downstream of the adjustment plug. A memory stop feature

allows the valve to be closed, and later reopened to the original set

position. Optional insulation shells are available, purchase separately.

1/2"

3/4"

Code

140

.40

140

.50

140

.60

106,5

112,5

0,790

0,924

1,185

Mass (kg)

1/2"

3/4"

Code

142140

142150

142160

0,434

0,523

0,677

Mass (kg)

Code A B C Wt (lb)

142241A ½" 2

" 2 ½" 1.0

142251A ¾" 2

" 2 ½" 1.2

142261A 1" 3

" 2 ½" 1.5

142271A 1 ¼" 3 ¾" 3 ¼" 2.3

142281A 1 ½" 3

" 3

" 3.0

142291A 2" 4 ¾" 3

" 3.5

Summary of content (9 pages)

PAGE 1
Balancing valve, variable orifice CALEFFI 142 series 01250/15 NA ACCREDITED ISO 9001 FM 21654 ISO 9001 No. 0003 Function Caleffi 142 series low lead manual balancing valves are used to measure and adjust the fluid flow rate in hydronic or plumbing circuits. Turning the knob moves a plug within the fluid stream which varies the flow rate. The flow rate is determined from the pressure drop created across the two test ports as the fluid passes the adjustment plug.
PAGE 2
Advantages of balanced circuits Operating principle Balanced circuits have the following principal benefits: The 142 series balancing valve is a hydraulic device that controls the flow rate of a fluid. 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 and the adjustment knob position. 1.
PAGE 3
Insulation shells The 142 series balancing valve can be supplied with optional insulation shells, code CBN142xxxx series purchased separately, to minimize heat loss or eliminate condensation in chilled water applications.
PAGE 4
Code 142251A 3/4” Δp (feet of head) Position 0.5 1 1 .5 2 (psi) (bar ) 2.5 3 3.5 4 20 46.00 1.0 10 20.00 5 4 3 10.00 9.00 7.00 5.00 0.5 0.4 0.3 0.2 2 0.1 3.00 1 2.00 1.50 0.70 0.5 0.4 0.3 0.50 0.2 1.00 0.05 0.04 0.03 0.02 0.01 0.30 0.1 0.20 0.005 Cv 12.5 5.6 7.0 G (l/s) (gpm) 2 00 0.003 Cv Max Position Size 3/4" 100 50 2.8 1.4 10 .70 .50 5 .20 .30 1 .06 2 0.5 .03 .10 0.3 20 0.05 3.0 gpm .02 .015 0.2 0.11 0.5 1 1.5 2 2.5 3 3.5 4 0.55 0.8 1.2 1.
PAGE 5
USING AND SETTING THE BALANCING VALVE Presetting The 142 series balancing valve features highly graduated adjustment which facilitates pre-setting. In commercial balancing applications where multiple balancing valves are used, significant labor time can be saved in the balancing process if in advance of being installed, the valves are pre-set to the expected knob position value. To pre-set, the anticipated pressure drop across the valve is required.
PAGE 6
Code 142281A 1 1/2" Code 142291A 2" Code 142291A 2” Code 142281A 1 1/2” ∆p (feet of head) Position 1 0.5 (psi) 1 .5 2 2.5 3 3.5 4 ∆p (feet of head) (bar) Position (psi) 1 1 .5 2 2.5 3 3.5 4 0.5 1.0 1.0 10 0.5 0.4 0.3 0.2 2 0.1 0.02 0.01 Cv 2.0 3.3 5.6 8.1 10.9 13.4 14.9 16.8 5.6 7.0 0.0006 0.0004 0.00035 2 00 100 50 20 0.001 Size 2" 0.5 1 1.5 2 2.5 3 3.5 4 Cv 2.3 5.5 7.2 10.2 13.2 17.1 20.0 22.0 G (l/s) (gpm ) 4 Cv Max 0.003 0.002 12.5 3.5 5.6 7.
PAGE 7
Application diagrams To control the flow rate that flows to each riser. To control the flow rate supplying each emitter. To balance potable water distribution circuits. To balance zone branches in circuits with three-way valves.
PAGE 8
Application diagrams To balance circuts that supply the coils of air handling units. GR1 GR2 GR1 GR2 To balance circuits that supply cooling unit evaporators or condensers. To balance circuits that supply cooling towers. To balance the various substations in district heating systems. s s To balance the by-pass line in circuits for temperature control. To balance primary/secondary coupled circuits.
PAGE 9
SPECIFICATION SUMMARIES 142 series Balancing valve with variable orifice. Threaded connections 1/2”, 3/4", 1", 1-1/4", 1-1/2", 2" NPT Female by Female. DZR low-lead brass body, bonnet and valve plug (< 0.25% lead content) certified by IAPMO R&T. EPDM hydraulic seals. PA6G30 adjusting knob with memory stop. Pressure test ports with DZR low-lead brass body and EPDM seal elements. Water and glycol solutions. Maximum percentage of glycol 50%. Maximum working pressure 232 psi (16 bar).