Page 69 - Webster Service Manual

64
INSTALLATION AND DIMENSIONAL DATA
Single-Rotation Models
Connect discharge and suction lines to NPTF ports
depending on desired direction of shaft rotation.
Direction of shaft rotation is always toward discharge
port.
CAUTION:
Do not attempt to operate pump with dis-
charge port blocked.
Correct shaft rotation is shown by arrow stamped on
back of pump. Do not attempt to operate pump in oppo-
site direction.
Use an external regulating valve in discharge line if
pressure regulation is necessary.
Installation Notes:
Fuel unit inlet pressure should not exceed 3 psig in
order to comply with National Fire Protection
Association's Bulletin 31“
To assure maximum performance, INLET VACUUM,
measured at unused INLET PORT, should not exceed
10”
Hg on single-stage pumps.
CODE
DIM “A”
DIM “B”
18
B
3.36
2.66
37
B
3.71
3.02
47
B
4.05
2.13
59
B
4.40
2.30
2.123
1.00
1.35
500
1.87
.44
.5000
A
B