Nova-Tech LMI Series G - SD Metering Pump - Manual (Page 9)

As the diaphragm starts forward on the discharge stroke
the pressure immediately rises inside the liquid end.
When the liquid end pressure rises above the discharge
line pressure, the discharge ball check is “pushed” up-
ward and the process fluid in the liquid end flows into
the discharge line. When the discharge stroke ends,
the diaphragm momentarily stops again. The pressure
in the liquid end equalizes with the discharge line pres-
sure and the discharge ball check reseats. The cycle
then starts again.
1.3 GENERAL SPECIFICATIONS
FLOW RATE:
Up to 115 GPH (430 L/H)
PRESSURE:
Up to 175 PSIG (12 BAR)
LIQUID END TYPE:
Mechanically Actuated Diaphragm
DRIVE TYPE:
Variable Eccentric
STEADY STATE ACCURACY:
±2% of pump full rated capacity between 10% and 100%
of rated capacity.
CAPACITY ADJUSTMENT:
Lockable stroke adjustment knob is adjustable from 0%
to 100% while pump is running.
LUBRICATION:
Drive is lubricated in an oil bath (Mobil SHC 629, 1 Quart).
TEMPERATURE:
Ambient and Liquid:
122 0 F (50 0 C) Maximum
14 0 F (-10 0 C) Minimum
3
PAINT:
Power Coating
SUCTION LIFT:
6.6 Ft (2 meters) of water column maximum
11.5 psia minimum internal pressure (3.2 psi maximum
vacuum)
WEIGHT:
38 lb (17.2 kg)