Nova-Tech LMI Series G - SD Metering Pump - Manual (Page 7)

SECTION 1
DESCRIPTION
1
1.1 GENERAL INFORMATION
The Series G Model D is a reciprocating, chemical dos-
ing pump capable of producing flows up to 115 gallons
per hour (430 liters per hour) at pressures up to 175 psi
(12 Bar). These pumps feature a mechanically actu-
ated diaphragm liquid end, which eliminates the need
for flow-restricting contour plates, and a stroke adjust-
ment mechanism based on the variable eccentric prin-
ciple instead of the traditional lost-motion design. It is
designed for industrial service and offers an accuracy of
±2% of full rated flow between 10% and 100% of its flow
range.
The basic pump components as illustrated in Figure 1
are:
• a drive device comprising a motor (1)
• a mechanical assembly (2)
• a liquid end (3).
An elastomeric bellows provides a leak-tight seal be-
tween the mechanical assembly and the liquid end.
Capacity adjustment is manually controlled by a stroke
adjustment knob (4).
Figure 1:
Pump Assembly
1
2
3
4 Motor
Mechanical Assembly
Liquid End
Stroke Adjustment Knob 5
6
7
8 Liquid End Mounting Assembly
Check Valve Assembly (Suction)
Check Valve Assembly (Discharge)
Stroke Lock Knob
1
7
3
6
2
8
4
5