Watts CSM-81-F User Manual
For Balancing and Flow Measurement Applications
ES-CSM-81
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Series CSM-81-F
Flow Measurement Valves
Sizes: 21⁄2" – 8" (65 – 200mm)
Series CSM-81-F Flow Measurement Valves are designed for
application on medium to high volume flow rate HVAC units.
The CSM-81-F’s lubricated plug design, extended throttling
range and large indicator plate provide accurate flow measurement and long service life.
CSM-81-F’s unique cylindrical plug design provides full flow
with minimal pressure drops and low operating torque. Large
wrench flats on the external plug surface make setting or closing
the valve simple.
Series CSM-81-F valves feature easily accessible checked
metering ports with drip caps to facilitate system balancing and
flow measurement. These valves also provide positive shutoff,
eliminating the need for a separate service valve.
Features
• Accurate flow measurement
• Flanged end connections
• Positive shutoff
• Checked metering ports
• Low torque
• Face to face dimensions to ANSI B16.10
Applications
• Fan coil units
• Water source heat pumps
• Reheat coils
• Panel coils
• Branch lines
• Pumps
CSM-81
Specifications
A flow measurement valve shall be installed on each
hot/chilled water unit or as otherwise shown on the plans. The
valve shall be of flanged end connections, provide positive
shutoff, low torque cylindrical plug design, with position indicator plate and checked metering ports. The valve shall be a
Watts Regulator Company Series CSM-81-F.
Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements,
please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials without prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.
BAA/ARRA Compliant
*
*This product complies with the Buy American Act and The
American Recovery and Reinvestment Act. For more information,
visit watts.com.
Model Size (DN) Dimensions Weight
A C D E F G
in. mm in. mm in. mm in. mm in. mm in. mm in. mm lbs. kgs.
CSM-81-F 21⁄2 65 71⁄2 191 51⁄8 130 315⁄16 99 7 178
11
⁄16 17 21⁄2 64 29.5 13.38
CSM-81-F 3 80 8 203 5
7
⁄16 137 43⁄16 106 71⁄2 191
3
⁄4 19 21⁄2 64 39.0 17.69
CSM-81-F 4 100 9 229 61⁄2 165 415⁄16 124 9 229
15
⁄16 24 21⁄2 64 61.5 27.89
CSM-81-F 5 125 10
1
⁄2 267 73⁄4 197 6 153 10 254 1 25
35⁄
8
92
88.0 39.91
CSM-81-F 6 150 101⁄2 267 73⁄4 197 6 153 11 279 1 25
35⁄
8
92
100.0 45.35
CSM-81-F 8 200 11
1
⁄2 292 93⁄16 233 61⁄2 165 131⁄2 343 11⁄8 28
35⁄
8
92
172.0 78.00
Suffix: F = Flanged Ends.
Flange hole di men sions
conform to ANSI B16.1
Class 125.
A
E
F
D
C
Dimensions - Weights
Materials
Body ASTM-A-126 Class B semi-steel
Plug ASTM-A-126 Class B semi-steel
Stem Seal PTFE
Pressure Taps Brass
1
⁄4" SAE 45° Flare
Pressure -Temperature
Working Temp Max. Working Pres.
Pattern Size °F °C psi bars
Flange 21⁄2" – 8" (65 – 200mm) 250 121 175 12
G
Installations
Generally locate the valve five pipe diameters downstream from
a fitting with two diameters downstream from the balancing
valve free from fittings. If a blancing valve is located downstream from a circulation pump, allow a distance of ten (10)
diameters between the pump and balancing valves.
ES-CSM-81 1038 © 2010 Watts
USA: No. Andover, MA • Tel. (978) 688-1811 • Fax: (978) 794-1848 • www.watts.com
Canada: Burlington, ONT. • Tel. (905) 332-4090 • Fax: (905) 332-7068 • www.wattscanada.ca
A Watts Water Technologies Company
2D
CSM
5D
2D
CSM
PUMP
10D
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