Village LW-160, Руководство пользователя и справочное руководство

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3
MOTOR SELECTION
To ensure desired pump output, the motor or engine driving the pump must possess sufficient horsepower to maintain full
RPM when the pump is under load. Using equation 2.3 an appropriate electric motor can be sized for the application.
This motor sizing approach is based on pump discharge volume and maximum pump discharge pressure. The constant
in the equation accounts for drive and system losses, which implies a mechanical efficiency of 85%. Consult the
manufacturer of a gas or diesel engine for selection of the proper engine size. Refer to Table 1
for sample horsepower
applications.
(2.3) HP Brake Electric
1460
PSI GPM
: Required HP
=
×
Table 1: Approximate Horsepower Required
HP Required (708-1 – 15 GPH) Working Pressure [PSI]
Flow [GPH] Speed [RPM] 800 1000
15 734 .14 .17
14 686 .13 .16
13 637 .12 .15
12 588 .11 .14
HP Required (708-1 – 22 GPH) Working Pressure [PSI]
Flow [GPH] Speed [RPM] 800 1000
22 718 .20 .25
21 686 .19 .24
20 653 .18 .23
19 620 .17 .22
HP Required (708-1 – 29 GPH) Working Pressure [PSI]
Flow [GPH] Speed [RPM] 800 1000
29 710 .26 .33
28 686 .26 .32
27 661 .25 .31
16 637 .24 .30
HP Required (708-3 – 2.3 GPM) Working Pressure [PSI]
Flow [GPM] Speed [RPM] 800 1000
2.5 1774 1.37 1.71
2.3 1632 1.26 1.58
2.0 1419 1.10 1.37
1.5 1064 .82 1.03
HP Required (708-3 – 3.5 GPM) Working Pressure [PSI]
Flow [GPM] Speed [RPM] 800 1000
4 1530 2.19 2.74
3.5 1339 1.92 2.40
3 1148 1.64 2.05
2 765 1.10 1.37
HP Required (708-5 – 8 GPH) Working Pressure [PSI]
Flow [GPM] Speed [RPM] 800 1000
8 1504 4.38 5.48
7 1316 3.84 4.79
6 1128 3.29 4.11
5 940 2.74 3.42
MOUNTING THE PUMP
The pump should be located as close to the source of supply as possible. Mount the pump on a rigid, horizontal surface
allowing easy access for crankcase oil draining. The pump should also be mounted in such a way that inspection can be
done with ease.
Ensure drive belt is adequately sized for system and shaft bearings. Pulley alignment is critical to the proper operation of
the system. To check for proper alignment, place a straight-edge, square, or rule against the pulleys to make sure they
CAUTION
Pulley should be sized to not exceed the maximum pump RPM rating.
(2.2)
RPM Motor
O.D. Pulley Pump
RPM Pump
O.D. Pulley Motor
: Size Pulley
=