Diaphragm Water Pumps from Cessco

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Gasoline Diaphragm Pumps

Multiquip
Model

Engine

Max
Head
(ft)

Max
GPM

Solids
Handling
Capacity

Dimensions
Diameter x
Height (inch)

Price

MQD2H

Honda
GX160

2.6

41.5 X 30.0
X 22.0

MQD3H

Honda
GX240

2.6

1.5"

41.5 X 30.0
X 22.0

Honda
Model

Engine

Max
Head
(ft)

Max
GPM

Solids
Handling
Capacity

Dimensions
Diameter x
Height (inch)

Additional
Information

WDP30

Honda
GX120

3.5

2.4"

31.5 x 30.5
x 25.7

More Information

Diaphragm
Pumps

Use a positive displacement
design rather than
centrifugal force to move
water through the casing.
This means that the pump
will deliver a specific
amount of flow per stroke,
revolution or cycle.

Engine-powered versions
are the most common and
typically use the drive shaft
to turn an offset connecting
rod that is coupled to a
flexible diaphragm. The
connecting rod alternately
raises (expands) and
lowers (contracts) the
diaphragm at a rate of 60
cycles per minute (rpm).

A vacuum is created inside
the pump casing each time
the diaphragm is raised
(suction stroke). This
opens the inlet valve and
seals the discharge valve

allowing water and air to enter the pump. When the diaphragm is lowered the resulting
pressure seals the inlet and opens the outlet valve purging the pump housing of water
and air (discharge stroke). Unlike centrifugal designs the water inside the casing is
positively displaced and no re-circulation occurs.

Diaphragm Pumps

have long been a favorite of the

rental

industry, they deliver

dependable performance and low

maintenance in an economical

package. They are

ideal for the slow

seepage applications where a centrifugal pump

would ordinarily lose

its

prime. They are perfect for muddy water, sludge or any water

with a

high

percentage of solids.

Positive Displacement Design - 2" and 3" models feature a positive
displacement design for quick, easy priming.
Oil Bath Transmission - Includes built-in 6:1 gear reduction, allowing use of
engines with standard parallel-keyed shafts.
Engines - Dependable, easy starting Honda overhead valve (OHV) engines.
Wheel Kits - Standard on both MQ Diaphragm Pumps.
Large Flapper Valves - with readily replaceable seats.
Cast Aluminum Pump Body - for reduced weight.

Diaphragm pumps are built for long-life and reliable service in
many applications. Favored by municipalities and contractors
for street repairs and other seepage applications.