3
2
[50]
1½
[40]
10 - 24
3½
[90]
1½
[38]
1
1
/
16
[27]
7
/
32
[6]
1
/
16
[1.5]
3
[80]
2
[50]
¼ - 20
4
[102]
1½
[38]
1⅜
[35]
9
/
32
[7]
1
/
16
[1.5]
4
[100]
3
[80]
¼ - 20
5½
[140]
1¾
[45]
2
1
/
16
[52]
9
/
32
[7]
⅛
[3]
6
[150]
4
[100]
5
/
16
- 18
7
[178]
2¼
[57]
2⅞
[73)
11
/
32
[9]
⅛
[3]
8
[200]
6
[150]
⅜ - 16
8¾
[222]
3
[76]
4¾
[121]
13
/
32
[10]
⅛
[3]
YARWAY
9100 SERIES ARC
®
VALVE
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
OPERATIONAL CHECK
When the valve is properly installed the
combined main and bypass flows should
equal or exceed that of the specified minimum
pump flow. If operational checks indicate a
deviation from the original specifications and
field adjustments are necessary, contact the
Emerson for additional information.
VALVE CARE
Except for periodic operational checks the valve
requires little maintenance. The disc assembly,
spring and bypass bushing should be inspected
coincident with the other annual inspections.
Inspection of the valve’s internal components
may be necessary more often if the valve is
cycled often or remains in bypass mode for
extended periods. The mechanism is easily
removed whenever the main flow is stopped.
Make certain that all pressure is relieved and
the pipeline is secured against pressurization
before attempting disassembly for inspection
purposes.
TABLE 1 – INTEGRAL BACK PRESSURE REGULATOR DRAW BOLT AND WASHER
Valve Size
BPR Size
Bolt Thread
Bolt Length
Minimum Thread Length
Washer OD
Washer ID
Washer Thickness
in.
[mm]
in.
[mm]
in.
in.
[mm]
in.
[mm]
in.
[mm]
in.
[mm]
in.
[mm]
Typical installation
3 diameters recommended and
minimum straight pipe on outlet
Pump warm-up
line (optional)
Receiver vessel
Optional location
of back pressure
regulator when
required
Long radius
pipe bends
Size line for maximum velocity
of 15 ft/sec [5 m/sec]
Optional check valve
10 diameters recommended
minimum straight pipe on inlet
From
pump
