Watts Series CSM-81-F
Flow Measurement/Balancing Valves
Sizes: 2
⁄
", 3", 4", 5", 6" and 8" (65, 80, 100, 125, 150, 200mm)
1
2
Installation Instructions
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.
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
Dimensions
▼
Max. Screw Length
C
▼
D
▼
MoDeL No.
orDeriNg
Size (DN)
Code
in.
mm
CSM-81-F 036540
2
⁄
65
1
2
CSM-81-F 036541
3
80
CSM-81-F 036535
4 100
CSM-81-F 036542
5 125
CSM-81-F 036543
6 150
CSM-81-F 036544
8 200
A
A
A
B
1
Face to
Bolt
Flange
Face
Circle
Dia.
in.
mm
in.
mm
in.
mm
7
⁄
191
5
⁄
140
7
178
1
1
2
2
8
203
6
152
7
1
⁄
191 5
2
9
229
7
⁄
191
9
229
1
2
10
1
⁄
267
8
1
⁄
216
10 254
2
2
10
⁄
267
9
⁄
241
11 279
1
1
2
2
11
1
⁄
292 11
3
⁄
299 13
1
⁄
343 9
2
4
2
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.
F
1"
B
▼
DiMeNSioNS
C
D
Center to
Center to
Flange
Top
Bottom
Thickness
in.
mm
in.
mm.
in. mm
5
⁄
130 3
⁄
99
⁄
1
15
11
8
16
16
7
⁄
137 4
3
⁄
106
3
⁄
16
16
4
6
⁄
165 4
⁄
125
⁄
1
15
15
2
16
16
7
3
⁄
197
6
153
1
4
7
⁄
197
6
153
1
3
4
3
⁄
233
6
1
⁄
165
1
1
⁄
16
2
8
CSM-81-F
K
Q - Typ.
'S' places
equally spaced
on bolt circle -
both flanges
A
1
F
K
Q
Square
Dia. of
Screw
Stem
Holes
Length
in.
mm
in.
mm
in.
17
1
⁄
31
⁄
19
2
⁄
1
3
1
4
4
2
19
1
1
⁄
31
3
⁄
19
2
1
⁄
4
4
2
24
1
⁄
38
⁄
19
2
⁄
1
3
1
2
4
2
25
2
51
7
⁄
22
3
5
⁄
8
8
25
2
51
⁄
22
3
⁄
7
5
8
8
29
2
51
7
⁄
22
3
5
⁄
8
8
IS-CSM-81-F
WeighT
S
No.of
Holes
mm
lbs.
kgs.
64
4
29.5 13
64
4
39 18
64
8
61.5 28
92
8
88 40
92
8
100 45
92
8
172 78
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