Graco Husky 3300e Operation Download Page 9

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Installation

Installation

Installation of

of this

this

this equipment

equipment

equipment involves

involves

involves potentially

potentially

hazardous

hazardous procedures.

procedures.

procedures. Only

Only

Only trained

trained

trained and

and

and qualified

qualified

personnel

personnel who

who

who have

have

have read

read

read and

and

and who

who

who understand

understand

the

the information

information

information in

in this

this

this manual

manual

manual should

should

should install

install

install this

this

equipment.

••• All

All

All electrical

electrical

electrical wiring

wiring

wiring must

must

must be

be done

done

done by

by a

a qualified

qualified

electrician

electrician and

and

and comply

comply

comply with

with

with all

all

all local

local

local codes

codes

codes and

and

regulations

General

General Information

Information

The

The Typical

Typical

Typical Installation

Installation

Installation shown

shown

shown is

is only

only

only a

a guide

guide

guide for

for

selecting

selecting and

and

and installing

installing

installing system

system

system components.

components.

components. Contact

Contact

your

your Graco

Graco

Graco distributor

distributor

distributor for

for

for assistance

assistance

assistance in

in planning

planning

planning a

system

system to

to suit

suit

suit your

your

your needs.

needs.

needs. Always

Always

Always use

use

use Genuine

Genuine

Graco

Graco Parts

Parts

Parts and

and

and accessories.

accessories.

accessories. Be

Be sure

sure

sure all

all

all accessories

accessories

are

are adequately

adequately

adequately sized

sized

sized and

and

and pressure

pressure

pressure rated

rated

rated to

to meet

meet

meet the

the

system’s

system’s requirements.

requirements.

Reference letters in the text, for example (A), refer to
the callouts in the figures.

Tighten

Tighten Fasteners

Fasteners

Before

Before mounting

mounting

mounting and

and

and using

using

using the

the

the pump

pump

pump for

for

for the

the

the first

first

first time,

time,

check

check and

and

and retorque

retorque

retorque all

all

all external

external

external fasteners.

fasteners.

fasteners. Follow

Torque

Torque Instructions

Instructions

Instructions,,, page

page

page 22

,,, or

or see

see

see the

the

the torque

torque

tag

tag on

on your

your

your pump.

pump.

pump. After

After

After the

the

the first

first

first day

day

day of

of operation,

operation,

retorque

retorque the

the

the fasteners.

fasteners.

Tips

Tips to

to Reduce

Reduce

Reduce Cavitation

Cavitation

Cavitation in

in a

a double

double

double diaphragm

diaphragm

diaphragm pump

pump

pump is

is the

the

formation

formation and

and

and collapse

collapse

collapse of

of bubbles

bubbles

bubbles in

in the

the

the pumped

pumped

liquid.

liquid. Frequent

Frequent

Frequent or

or excessive

excessive

excessive cavitation

cavitation

cavitation can

can

can cause

cause

serious

serious damage,

damage,

damage, including

including

including pitting

pitting

pitting and

and

and early

early

early wear

wear

wear of

fluid

fluid chambers,

chambers,

chambers, balls,

balls,

balls, and

and

and seats.

seats.

seats. It

It may

may

may result

result

result in

reduced

reduced efficiency

efficiency

efficiency of

of the

the

the pump.

pump.

pump. Cavitation

Cavitation

Cavitation damage

damage

and

and reduced

reduced

reduced efficiency

efficiency

efficiency both

both

both result

result

result in

in increased

increased

operating

operating costs.

costs.

Cavitation depends on the vapor pressure of the
pumped liquid, the system suction pressure, and the
velocity pressure. It can be reduced by changing any
of these factors.

Reduce

Reduce vapor

vapor

vapor pressure:

pressure:

pressure: Decrease

Decrease

Decrease the

the

temperature

temperature of

of the

the

the pumped

pumped

pumped liquid.

liquid.

Increase

Increase suction

suction

suction pressure:

pressure:

Lower

Lower the

the

the installed

installed

installed position

position

position of

of the

the

the pump

pump

relative

relative to

to the

the

the liquid

liquid

liquid level

level

level in

in the

the

the supply.

supply.

Reduce

Reduce the

the

the friction

friction

friction length

length

length of

of the

the

the suction

suction

piping.

piping. Remember

Remember

Remember that

that

that fittings

fittings

fittings add

add

add friction

friction

length

length to

to the

the

the piping.

piping.

piping. Reduce

Reduce

Reduce the

the

the number

number

number of

fittings

fittings to

to reduce

reduce

reduce the

the

the friction

friction

friction length.

length.

Increase

Increase the

the

the size

size

size of

of the

the

the suction

suction

suction piping.

piping.

NOTE:

NOTE: Be

Be sure

sure

sure the

the

the inlet

inlet

inlet fluid

fluid

fluid pressure

pressure

pressure does

does

does not

not

exceed

exceed 25%

25%

25% of

of the

the

the outlet

outlet

outlet working

working

working pressure.

pressure.

Reduce

Reduce liquid

liquid

liquid velocity:

velocity:

velocity: Slow

Slow

Slow the

the

the cyclic

cyclic

cyclic rate

rate

rate of

the

the pump.

pump.

Pumped liquid viscosity is also very important but
normally is controlled by factors that are process
dependent and cannot be changed to reduce
cavitation. Viscous liquids are more difficult to pump
and more prone to cavitation.

Graco recommends taking all the above factors
into account in system design. To maintain pump
efficiency, supply only enough power to the pump to
achieve the required flow.

Graco distributors can supply site specific
suggestions to improve pump performance and
reduce operating costs.

3A7036E

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