Dragon Wholesaling 178 Series Installation, Operation And Maintenance Instructions - Page 13

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We normally do not see cavitation as much with the desander and desilter pumps because the

rubber cones do not wear as rapidly as steel cones. Volume requirements are closer to 800 to

1000 GPM.

Capacity Limits of Pumps

Capacity limits for pumps listed below do not consider suction line velocity or NPSH calculations

which must be made for every installation.

Capacity Requirements of Equipment in Rig Applications

The chart below lists the normal design requirements when the equipment is new with no wear.

EQUIPMENT

4" CONE

4H (5") CONE

6" CONE

8" CONE

12" CONE

6" MUD HOPPER

3/4" NOZZLE

1" NOZZLE

1 1/2" NOZZLE

2" NOZZLE

MECHANICAL BRAKES

ELECTRIC BRAKES

SWACO DEGASSER

WELCO DEGASSER

BRANDT DG5 DEGASSER

BRANDT DG10 DEGASSER

Long Term Pump and Motor Storage

1. Pump packages should be stored indoors in a clean, dry and protected environment.

2. The storage area is to be free from any vibration and temperature extremes.

3. Motor and pump shafts are to be rotated manually every two months. A record of the rotation

should be made.

4. Grease in the motor and thepump bearings is to be purged at the time of removal from

storage and replaced with an ample supply of fresh grease in each grease cavity.

5. Motor windings should be megged at the time the equipment is placed in storage. At the time

of removal from storage the resistance reading must not have dropped more than 50% from

the initial reading. Any drop below this point necessitates electrical or mechanical drying of

the motor windings. Condensation from hot days and cool nights can fill the motor half full

with water. This is a greater potential problem in damp areas.

6. If the pumps are to be stored outdoors, the pump suction and discharge openings should be

sealed to prevent any water from entering the pump housing. This will prevent rust and corrosion.

Item

No.

Description

Parts Cross Reference Chart

Qty Req

MCM

DESIGN VOLUME

45 to 60 GPM

80 GPM

125 GPM

250 GPM

450 to 500 GPM

550 GPM

80 GPM

140 GPM

300 GPM

550 to 600 GPM

40 to 50 GPM

50 to 200 GPM

4000 GPM

7000 GPM

500 GPM

1000 GPM

Mission

Halco

Harrjsburg