Installation
1. Install valve on return line of equipment to be balanced or as
shown on the plans.
2. For maximum accuracy, the flow measurement/balancing
valve should be located in an unrestricted straight pipe run
so that no fittings (elbow, valve, tee, etc.) is closer to the
flow measurement/balancing valve than 5 pipe diameters
upstream and 2 pipe diameter downstream. If a balancing
valve is located downstream from a circulation pump, allow a
distance of ten (10) diameters between the pump and balanc-
ing valves.
3. Series CSM-81-F flow measurement/balancing valves are
bidirectional and should be installed to insure ease of hooking
up meter and adjusting setting
Flow Measurement Instruction
1. With wrench, turn indicator to open position on indicator
plate.
2. Connect, vent and prepare the differential gauge. Refer to
instructions furnished with the gauge.
3. After initial pressure differential reading is taken, refer to flow
rate charts to obtain flow rate based on pressure differential
and valve setting. If flow rate is in excess of that specified,
turn indicator towards closed position, noting pressure drop
and valve setting and determining new flow rates from flow
rate chart. The unit or system has now been balanced.
4. Disconnect differential gauge.
Watts Series CSM-81-F
Flow Measurement/Balancing Valves
Sizes: 2
1
⁄
2
", 3", 4", 5", 6" and 8" (65, 80, 100, 125, 150, 200mm)
Installation Instructions
CSM-81-F
IS-CSM-81-F
The Watts Series CSM-81-F Flow Measurement/Balancing Valves are lubricated plug
valves designed for applications requiring balancing on medium to large flow rates. The
valve flanges are in accordance with ANSI B16.1 Class 125. Face to Face dimensions
are in accordance with ANSI B16.10.
Dimensions
▼
▼
▼
▼
▼
▼
▼
▼
▼
Q - Typ.
‘S’ places
equally spaced
on bolt circle -
both flanges
K
▼
▼
Max. Screw Length
C
D
B
A
F
▼
▼
▼
▼
A
1
1”
▼
▼
MoDeL No. orDeriNg
Size (DN)
DiMeNSioNS
WeighT
Code
A
A
1
B
C
D
F
K
Q
S
Face to
Bolt
Flange
Center to
Center to
Flange
Square
Dia. of
Screw
No.of
Face
Circle
Dia.
Top
Bottom
Thickness
Stem
Holes
Length
Holes
in. mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm.
in. mm
in. mm
in. mm
in. mm
lbs. kgs.
CSM-81-F 036540 2
1
⁄
2
65
7
1
⁄
2
191 5
1
⁄
2
140
7 178 5
1
⁄
8
130 3
15
⁄
16
99
11
⁄
16
17 1
1
⁄
4
31
3
⁄
4
19 2
1
⁄
2
64
4
29.5 13
CSM-81-F 036541
3 80
8 203
6 152 7
1
⁄
2
191 5
7
⁄
16
137 4
3
⁄
16
106
3
⁄
4
19 1
1
⁄
4
31
3
⁄
4
19 2
1
⁄
2
64
4
39 18
CSM-81-F 036535
4 100
9 229 7
1
⁄
2
191
9 229 6
1
⁄
2
165 4
15
⁄
16
125
15
⁄
16
24 1
1
⁄
2
38
3
⁄
4
19 2
1
⁄
2
64
8
61.5 28
CSM-81-F 036542
5 125 10
1
⁄
2
267 8
1
⁄
2
216 10 254 7
3
⁄
4
197
6 153
1 25
2 51
7
⁄
8
22 3
5
⁄
8
92
8
88 40
CSM-81-F 036543
6 150 10
1
⁄
2
267 9
1
⁄
2
241 11 279 7
3
⁄
4
197
6 153
1 25
2 51
7
⁄
8
22 3
5
⁄
8
92
8
100 45
CSM-81-F 036544
8 200 11
1
⁄
2
292 11
3
⁄
4
299 13
1
⁄
2
343 9
3
⁄
16
233 6
1
⁄
2
165 1
1
⁄
8
29
2 51
7
⁄
8
22 3
5
⁄
8
92
8
172 78