Multiquip MG30M2D - Manual (Page 23)

MAYCO MG-30 PUMP — OPERATION AND PARTS MANUAL — REV. #3 (09/15/11) — PAGE 23
How It Works
The Mayco Plaster Pump, Model MG-30 designed to pump
materials at a steady rate of flow. This is done by using two
cylinders. The crank powered pumping cylinder does all of the
pumping. The cam powered slave cylinder is a compensating
cylinder and operates in a manner which causes the pulsating
material from the pumping cylinder to be pumped at a steady
rate of flow. The slave cylinder will not move until enough pressure
is developed to produce this steady rate of flow.
MG-30 PUMP — APPLICATION
As shown in Figure 5, the pumping cylinder retracts drawing
the material past the ball A and filling the cylinder. The slave
cylinder is pumping the material out to the nozzle and
causing ball B to seat preventing the material from returning
to the pumping cylinder intake.
Figure 5. Pumping Cylinder (Discharge)
DISCHARGE
A
B
PUMPING
CYLINDER
INTAKE
SLAVE
CYLINDER
INTAKE
HOPPER