Dresser RCS Instructions Manual

r

ROOTS

$2.00

INSTRUCTIONS

CONTENTS

INFORMATION SUMMARY

...

Receiving

OPERATING CHARACTERiSTiCS

Description

OPERATING LIMITATIONS

Pressure

INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . .

Mounting

LUBRICATION

Oil System

DO

THESE

Installing

...

Control

...

Temperature

...

Aligning

.............................

...

Sealing

THINGS

NUMBERS

...........

...

Operating

.............

...

Protection

..................

...

Speed

...

Piping

...

Servicing

....

IN

( )

This page

To

ARE

2

2

..

3

6

Get

ROTARY

METRIC

The

EQUIVALENTS

OPERATION

Starting

TROUBLE

Capacity

SAFETY PREACUTIONS. . . . . . . . . . . . . . . . . . .

Physical

MAINTENANCE/REPLACEMENTS

Servicing

PARTS

DISTRIBUTORS

Most

...............................

...

Checking

SHOOTING

...

Power

...

Operating

...

Repairs

DRAWiNGS

............................

From

LOBE

...

.......................

...

...

.........................

Your

BLOWERS

Running

Heating

...

General

Clearances

Roots

............

Blower

..

6

7

8

8

13
20

IICheck

claim with carrier, notify nearest

ElUnpack
against

shortage appears.

BlStore
tion, if possible. Lift
sTALLATION
ment. Keep covers on all openings. Protect against
weather

tions in
supervision
nearest Dresser
weeks in advance
Standard

IDProvide
persons working on or near equipment during
stallation

shipment for damage in transit. After filing

Sales Office or factory.

shipment carefully

Packing List. Notify Sales Office or factory if a

in a clean,

and

corrosion

LIMITATIONS

this

manual and plan

by

charges

for adequate safeguards against accidents

and

NOTE - Information In this manual is correct as

without

dry

location until ready for

by

methods discussed under IN-

to

avoid straining or distorting

if

outdoor storage is necessary.

a Service Engineer is needed, contact

Parts

and

and

confirm

will

be made.

operation. See PRECAUTIONS.

obligation to make similar changes on equipment

and

check contents

and

INSTALLATION sec-

the

complete installation.

Service Center

by

your purchase order.

of

the date

the

at

least two

of

publication. The Manufacturer reserves the right to make design or material changes without notice,

installa~

equip-

the

both

in-

of

prior manufacture.

If

to

iii

Install all equipment correctly. Foundation design

must

be adequate

mended accessories for operating protection.
IiIMake

rectly lubricated before start-up. See LUBRICATION.

'::1 Read

equipment briefly to check for obvious faults, and make
corrections. Follow with a trial
operating conditions.

mIn

tion of a new unit, do not
Sales Office or factory, giving all nameplate information

plus
of

the

EUnits
the
the

Parts. Good inspection
reduce

page for

sure

starting

the event of trouble during installation or opera-

an

outline of operating conditions

trouble.

out

owner.

It

operations described in this manual, using Factory

the

parts

and

piping carefully done. Use recom-

both

driving and driven equipment is cor-

check points under OPERATION. Run

run

under normal

attempt

of warranty may be repaired or adjusted

is recommended

and

maintenance practices should

need for repairs. See Distributor List on

and

service after warranty period.

repairs. Notify nearest

and

a description

that

such work be limited

Bulletin IRB-115-387

by

to

last

and

OPERATING

Roots RCS blowers,
available
Within
produce reasonable
units
handling
are
not

displacement
mined
employs

shafts
cylinder closed
rotate,
out

The

resistance

Effective sealing of
discharge
operating
tacts
Clearance
tained
mounted
casing.

FIGURE
discharge
Position 1
discharge, while
cylinder wall is
this
and
tion
ing
rotation

nately
each impeller)
The

in

basic frame

this

frame

are

designated
air

in

unsuitable

designed
The

by

air

the

pressure

eliminates

by a pair

Operation

impeller

further

3.

At

under

One complete revolution of

traps

pumping

for

to

basic

type

size,

operating

two

double-lobe impellers

and

rotating

at

is

drawn

opposite side

of

the

area

clearances.

between

on

the

of

1,

where

with

it

is delivering a known volume

then

rotation

the

same

the

lower impeller,

reaches

four

and

capacity

CHARACTERISTICS

size are two case lengths, selected

steps

as

either

handling

prevent

Roots

unit,

the

ends

into

against

developed, therefore, depends on

discharge

is accomplished

Resulting

the

need for

the

of

accurately

two

shafts

the

rotary

air

the

lower impeller

space

being

filled. Counterclockwise

traps

delivers

time,

Position

equal

pushes

as

covered

size of

in

blower carJacity

air

blowers,

pressure

gases

leakage

rotary

whose

speed

in

opposite directions within a

by

headplates.

one side of

the

system.

the

blower inlet

impellers

extended

lobe blower is

flow is

(B)

between

equal volume

another

and

1 again.

and

known volumes of air (two

them

of a lobe blower

in

this

manual,

4Y2

inch

gear

diameter.

ratings.

and

may

be

or

vacuum

because

to

atmosphere.

lobe blower is a positive

pumping
and

pressure

the

pressure

by

absence of moving con-

any

during

machined

right

rotating

the

it

to

the

similar volume is form-

will

the

through

service.

shaft

capacity

conditions.

mounted

cylinder

use of

internal

outside

to

upper

be

driving

operating

on parallel

As

the

impellers

and

existing

area

from

very

lubrication.

rotation

left from

(B)

discharge in Posi-

discharged

timing

the

illustrated

clockwise.

(A)

impeller

rotation

in Position

shaft

to

the

discharge.

are main-

are

to

All

used

for

They

seals are

is deter-

It

forced

there.

the

the

small

gears,

blower

in

inlet

to

In

to

the

and

of

2,

when

alter-

by

at

a con-

stant

speed

therefore remains relatively
reasonable inlet or discharge
change
rotation

by
ing.
driver,
blower.
inlet
then
near
discharge line
against

usually
ing
coupled

sion is required, or excess air
manually
returned
100
acceptable blower

operating conditions,

specific information
In
within
speeds

must

Serious

Roots
proved
is, of course, also

speed

limits
operating

capacity,

or

attempt

No

means

of a

This

but

If

may

be

an

adequate

the

cut-off

When

be

the

diameter

arrangement

to

OF

(38°C)

Before

all cases,

the

as

not

be

damage

OPERATING

To

permit

RCS blower

limiting conditions.

Maximum

are

apply

it

is

necessary

vent

some

of

should ever be

throttle

will

can

a possibility does

cut

blower. A

a belt drive is employed, blower speed can
adjusted

controlled unloading valve

the

through

making

operating

approved

stated

used

valve in

not

only increase

also overload

off

during

vacuum

pressure

near

the

blower is required for protection

or

blocking

to

obtain

of one

a variable speed

blower inlet,

a by-pass

temperatures.

any

contact

applying

conditions

range

under

LIMITATIONS.

to handle air

to

the

rotating

LIMITATIONS

continued

must

contingent

limits for pressure,

specified

to

clearances

in

Table 1 for RCS blowers. These

all blowers of

as

listed

the

air.

exist
normal operation of a process,
relief valve

in

or

may

change in blower capacity, or

of

pressures,

satisfactory

be

operated

The

on

normal

pressure

either

to

change

made

to

control

the

intake

or

the

power load on

and

seriously

that

flow

must

type

relief valve

this

line. See

desired

both

the

the

to

containing

in

capacity

sheaves.

motor

be blown off

and

air

must

arrangement

nearest
your

particular

must

temperatures

Also,

liquids or solids.

parts

will result.

performance, a

within certain ap-

Manufacturer's

such

operation.

temperatures

construction,

Table

5,

independent

variations.

discharge pip-

damage

to

the

be

Figure

by

In

or transmis-

through

silencer.

be cooled

to

Sales Office for

be

maintained

the

when operated

of

To

speed or

capacity

the
the

blower

installed

in

the

2.

dhang-

a direct

If

to

maintain

blower.

and

blower

warranty

and

having

a

POSITION 1 POSITION 2 POSITION 3

Figure 1 :-Flow Through ReS Blower

•

K

~207'J

2

l,

under

standard

one

of

these

Example:
rise (increase
discharge) for
its

maximum

can

easily occur

Temperature rise then is the

words,

the

imum

rating

pressure,

Be sure to

and

mercury

the

inlet

along

with

operating

of

PRESSURE-On
(between blower
figure

listed

in

Also,
pressure
never

exceed 25

size.

On

vacuum

mospheric

be

greater

TEMPERATURE-RCS

proved only for

ture

limitations

A.

Measured
when
considered as
around
unless

B.

If

inlet

allowable

% of

the

temperature

C.

An average
to

250°F.

SPEED
speeds
be direct coupled to
pressure/temperature
low speeds, excessive
factor as

up

Table

1-Maximum

Frame

Speed

Size

404
406
409
412 3820
418 3820
616
624

atmospheric conditions.
limits.
The listed

in
any
pressure

operating limit is always determined by

reached

temperature

arrange
type

and

discharge connections of

a good tachometer, will enable periodic checks

conditions to be made easily.

inlet

for

the

any

system

above atmosphere,

PSI

service,

pressure,

than

values

installations

can

temperature

the

inlet

the

blower.

the

blower is

temperature

temperature

difference

and

temperature

(121°C).

RANGE-RCS

to

the

maximum

noted

in

maximum

ail'

temperature

particular

or

vacuum

at

high

altitude

first.

or speed.

connections or taps for thermometers

pressure

pressure

and

discharge)

specific blower frame size concerned.

where

the

(172

kPa)

with

the

inlet

listed

be

maintained

rise

is

at

ambient

the

general

This

installed

is

higher

rise

between

the

ambient

suitable

conditions

temperature

the

preceding example.

Allowable Operating Conditions

Press.

Rise

RPM

3820
3820

'3820

2860 10
2820

PSI

15
15

15
15
15

10

(kPa)

(104)

(104)

(104)
(104)
(104)

(69)
(69)

INSTALLATION

Roots
treated
atmospheric

RCS blowers are

after

factory

corrosion before installation. The

assembly

Do

not

allowable

between

blower

may

occur well before

rating

is reached.

or

at

very low speed.

limiting

It

can

or

vacuum

blower

the

gauge

the

suction or

for

blower frame sizes

where

must

temperature

is

values

the

between

blowers

listed for

internally

condition.

be

anyone

gauges
the

service;

discharge

temperature.

not

constant

are

Inlet

Hg.

to

the

must

inlet

regardless of blower

discharge going to at-

vacuum

the

specific

the

following tempera-

in

service.

not

exceed listed values

outdoor

outdoors.

than

ambient,

must

actual

measured

temperature.

inlet

and discharge

may
the

sizes. They

speed drivers

also

within

rise

may

Vac.

In.

(kPa)

(50)

15

(50)

15

(50)

15

(50)

15

(50)

15

(50)

15

(50)

15

and

protect

against

exceed

temperature

of

blower. These

pressure

not

is

at

pressure

frame

of

temperature

be reduced

be

operated

be

the

Temp.

FO

275
275
275
275
275
230
230

any

inlet

and

This

In

other

the

max-

the

three:

at

or neal'

rise

exceed

Ambient

the

a positive

must

must

not

size.

are

the

space

the

listed

inlet

may

limits.

limiting

Rise

Co

(153)
(153)
(153)
(153)
(153)
(128)
(128)

externally

normal

maximum

ap-

is

by

up

at

if

At

period

of

internal

under

average

removed. Protection

mosphere is

ready

to

start

ly

by

evaporation. .

If

there

tion

and

start

insure

corrosion protection:

1.

Coat
end
equivalent.
may
have
Motorstor
cylinder
mist
while
and
not
system.
Chemical Co., 2000

60521.

2.

Paint
and
X-145'or equivalent.

3.

Seal inlet, discharge,
recommended
the

system,
ed periods.
mosphere,
lose

4.

Units
tion
coverage

5.

Rotate
two weeks.

6.

Prior
let

and
absence
at

this

cover

Because of

location of

ter. A clean,
ferred. However,
give

satisfactory

that

the

correct
pected
that
conveniently
driver

Engineer
Workmen
weight
results.
complished
tices. Blower
twist,
properly

temperatures,

routine

and

Supervision of

is

machinery should

Handling

and

air piping

connected.

protection

conditions, if closing

against

not

provided. Avoid opening

installation,

is

to

be

an

up,

the

internals

bearing

Repeat

require.

to

of
it

discharge,

harmful

all

its

during

to

the

accessory

with

with

Motorstor

be

removed before lubricating.

may

shortly

petroleum

is

running

or

to

Motorstor

shaft

extension,

other

that

and

If

the

effectiveness.

are

not

to

storage.

such

as a tarpaulin

drive

shaft

start

up, remove flange covers on

discharge

of

rust.

time, remove

and

inspect

the

completely enclosed blower design,

installation

dry

and

an

outdoor

service.

grade

checking

after

installation.

equipment

the

not

usually

experience

of

care,

mounting

must

is considered

chemical or salt water at-

as

protection

extended

following

of cylinder,

reservoir

once a

be removed from within

before

start

solvent

at

a slow

it

can

remain

the

operation of
is a

Spring

inlet

exposed surfaces

and

the

unit

allowed

any

part

Motorstor

be

subjected

If

three

and

inspect

Check all

gearbox

gear

teeth

is generally

protected

or

Important

of

lubricating

and

that

and

servicing

installation

required for

in

be

able

the

equipment

and

in

must

be

clean,

is oil soluble

to

stored

wet

compliance

be

to

be

one

year

plugs

or seals are

the

blower

until

will be

lost

quick-

period between installa-

steps

should

gearbox
with
year

up

through

speed

in

product

Rd.,

and

vent

openings.

be

set

remain idle for extend-

is left open

vapor

to

or

or

four revolutions every

internals

internal

and
and

indoor location is pre-

location will normally

oil be provided for ex-

the

blower

Effect

must

also be considered.

by a Factory

installing

to

produce

solid,

accurately

be

taken

and

drive

Motorstor

or

as

conditions

and

does

If

desired,

by

spraying

with

the

blower if

the

Oak

discharge flanges,

with

in

place, piped

will escape

excessive vibra­outdoors, provide
lean-to.

clearances. Also,

drive end

bearings

not

a critical mat-

requirements

be

can

of

the

these

light-medium

needs

and

without

a fine

the

blower

open inlet

connected

of

Daubert

Brook, Ill.

Nox-Rust

It

is

to

the

both

to

insure

bearing

for

rust.

located so

be

handled

location on

Service

blowers.

satisfactory

to

be

safe prac-

strain

aligned

not

to

or

not

the

it

is

not

to

at-

and

in-

are

ac-

or

and

3

Two

methods

base. One is

headplates.

tapping
cable pull
eyebolts
under
method
drive

with

on

are

the

prevents

shaft.

When

with

or

without

under

the

base

that

no

strains

ing

feet,

or

use

NOT

the

Before

may

be

to

use

eyebolts screwed

Test

them

first

a hammer.

these

bolts

not

available, lifting slings

cylinder

adjacent

strain

blower is furnished

a driver, use of lifting slings

flanges is required.

are placed on

on

any

mounted

eyebolts

starting

in

the

installation, remove plugs, covers
or seals from blower inlet
inspect

If

headplates

vent

shaft
at
flanges

this
again
ing.

be

disappear

pay

is especially

nished

may

concrete

tory

leveling

the

interior completely for

cleaning is required, finish

and

impeller

such

as

DuPont

by

hand

all points.

and

drive

time

with

to

keep

Washing

clean.

out

The

during

Care,

plus

dividends when

true

without

be

to

mount

pad,

results.

Direct

and

alignment.

use

of

It

Triclene D.

to

make

sure

Anti-rust

shaft

extension

the

same

out

dirt

until

is

not

required if

corrosion inhibitor

operation.

consideration of all possible problems, will

arranging

when

a baseplate.

such a unit

but

this

generally produces

definitely causes

structural
recommended mounting.
must

be

rigidly reinforced when

spring

transmission

sulating

should
structure,
to

well anchored
mounting
plate
surface machined flat,
ing
mounted.
holes located
alternative, smaller
be used.
more difficult,
blower.

carry

For

should

areas

type

mountings

can

usually

pad 1 to

be

supported

with

the

a blower

plate

2 inches

by

a rigid concrete slab laid on

blower

and

without

and

carefully leveled steel or

be

provided

be

about

1 inch
and

at

one side

It

should

to

and

have

match

plates

This

is more complicated usually

and

can

Use

of a

high

quality

tant.

With

the

mounting

blower on

it

without

bolting

used

to

handle a blower

into

the

for

tightness

In

lifting, keep

as

nearly vertical

and

fractures

the

direction of

as

may

to

the

headplates.

being

placed on

mounted

Arrange

the

blower

the

on a baseplate,

these

casing

accessory equipment. DO

the

top

of

the

headplates.

and

discharge connections

dirt

or foreign material.

by

thoroughly

After

that

the

compound

may

solvent.

ready

the

the

blower is a

The

washing

with a petroleum

impellers

Then

to
the

used

blower mounting.

convenient procedure

the

this,

turn

on

the

also be removed

cover

connect

interior is found

will vaporize

"bare"

directly on a floor

least

the

most

problems in

framing members is also

If

unavoidable,

part

should

be

reduced

(25

to 50 mm) thick.

a full steel

not

plate

the

of a building,

be used. Noise

by

use of a cork in-

attached

top

driver.

base,

it

is recommended

at

the

installation point. The

(25

mm) thick,

large enough

one

end

properly sized

the

blower foot drilling.

at

each

end

to

after

of

studs

the

provide level-

the

makes

produce

plate

twist

or

machinist's

in

place

and

and

check for rocking.

strains

level is impor-

leveled,

without

top

of

the

by

possible.

be

passed

Either

extended

passing

slings so

or mount-

and

cylinder,

sol-

the

drive

turn

freely

connection

the

flanges

the

air pip-

and

This

unit, fur-

or

small

satisfac-

not

members

and

The

pad

to

the

of

the

cork

that

cast

iron

with

its

top

blower is

or

tapped

As

blower

may

leveling

in

the

set

the

If

it

If

at

to

an

is

not

solid,

determine

under

one foot
each of
mounting

sure

direct

the

accurately

the

while

thickness.
final

the

diagonally-opposite

studs

the

impellers still

coupled

motor

shaft

with

blower

the

driver is on

This

shaft

alignment

When

blower

to

on a common baseplate,

perly

aligned

poses.

the

baseplate
vibration,
directions so
vided
under

ly

leveled

It

twisted

alignment.

after

the

nect

the

should

and

Satisfactory

and

that

with

suitable anchor bolts.

and

partly

by

shimming, is recommended.

is

possible
during

For

base

drive

turn

freely
hold-down screws
ly

in

and

contact

again

with

check for free impeller rotation. Finally, if
blower is direct coupled to
coupling

alignment

the

total

thickness of

to

stop

the

rocking. Place half of

short

or

screws.

to

a driving motor, consider
and
the

be

bolted

allows

and

is to

installation

on a concrete slab

leveling

it

inside

for a

shipment,

this

has

been leveled

and

at

and

the

Rotate

turn

the

necessity

blower shaft.

directly

shims

freely.

of

at

the

for

Best

to

adjustment

by

varying

driver

the

be

treated

the

have

been factory

assembly

as a unit

can

be

that

the

top

of

the

is free of twist. The slab

the

base,

after

base-mounted

thus

disturbing

reason,

rotate

all points.

determine

base.

carefully

the

If

make

and

blower

not,

the
and

Loosen

whether

insert

driver, check
make

feet,

If

it

the

least

of

shim

base

The

assembly

the

bolted down. Discon-

rections.

In

blower, consider how

the

blower design

sible rotation.

a

Standard
shaft
has

the

When

the

driver
exceed
LIMITATIONS

sizes. A
connect

a

Coupling halves
sufficient
strains

planning

at

the

drive

the

flexible

the

and

the

installation,
piping

and

assembly. RCS blowers have rever-

arrangement

top. Horizontal

shaft

at

a blower is
RPM

maximum

DIRECT

must

be selected or governed so

speed

the

left.

and

arrangements

on vertical

units'

standard

COUPLED

rating

of

the

for allowable speeds for various blower

type

coupling should always be

driver

and

gap

between

end

thrust

blower

must

be

shaft

on

shafts.

accurately

ends

provided so

either

shaft
minimized. This will require considerable care in
mounting
perfect
must
trical center if end

recommended. Coupling halves

shafts
them.
shafts

reading,

of

the

driver.

The

alignment in all directions

be

established

The

following

so
Maximum
should

taken

that

with

play

exists.

requirements

only

light

deviation

not

exceed .005" (.13 mm)

on

the

two coupling hubs.

two

shafts

as

possible,

the

motor

armature

for a good installation are
must

tapping

in

is required

offset

shims

required

this

under

and

tighten

drive

shaft

to

make

the

blower is

the

to

be aligned very

arrangement

mounting

1/8

motor

to

height

is for

plate

inch

(3

mm)

position in

thicknesses.

mounted

will have been pro-

for leveliIJ.g pur-

obtained

is rigid

by

and

setting

free of

carefully in two

must

be pro-

use of

it

has

following

shaft

grouting

been careful-

to become

the

by

hand.

the

blower foot

original

checks

all feet are even-

shims as required

shaft

and

any

necessary cor-

before

units

are

has

setting
dictated

the

drive

arrangement

to

its

driver,

as

not

blower. Refer

used

aligned, and a

that

side

are

avoided or

must

be

in

as near

and

the

gap

on

its

elec-

be,

fitted

to

the

two

to

install

alignment

total

Maximum

of

indicator

devia-

the

be

of

It

the

by

to
to

to

the

the

4

tion from parallel of
exceed .001"
the

coupling.

(.03

When a blower is

tion of sheave diameters will

the

inside coupling faces should

mm) when checked

BELT

DRIVEN,

result

at

six points around

the

proper selec-

in

the

required blower

not

speed. This flexibility can lead to operating temperature

problems caused

sure

the

drive speed selected is within

for

the

specific blower size, as specified under LIMITA-

by

blower speed being too low. Make

the

allowable range

TIONS.

Belt

drive arrangements usually employ two or more
V-belts running
driver is less critical
must

be level
driver should be mounted on
blower (horizontal piping)
shaft

on a horizontal blower. The driver
mounted on
justing

and
correctly,
and

the

nominal

lengths to

Install

not

more

The

shaft
ed into place
driving fit can damage a bearing,
blower damage
operating position. A loose fit
vibration,

The driver sheave should also be mounted as close

its

bearing as possible,
rectly. Position
of

the

total

from

the

blower,

of

the

sheave is accurately in line with the blower sheave.

This position minimizes belt wear,

adjustment
After belts are installed,

dance with
ly enough tension should be applied to
when

the

in

grooved sheaves. Installation of

than

for direct coupling,

and

parallel with

and

an

adjustable

removing

both

sheaves need to be mounted on their

be

used.

the

blower sheave so

than

shaft

Ya

inch

the

V-belts. To position

center distance known for

(.3

mm) from

fit should be such

by

hand

or

by

the

the

inlet side of a vertical

on tlie side nearest to

base to permit installig, ad-

that

its

the

that

the

sheave can be work-

very light tapping. A

and

by

and

may

the

forcing

result

driver on

the

impeller

or

wobbly sheave will cause

in

shaft

and

again should fit

its

adjustable base so

breakage. "

but

its

blower shaft. The

must

also be

the

shafts

the

inner

hub

face is

drive end cover.

tight

may

cause internal

out

of

its

normal

the

shaft

movement is available in the direction away

and

mount

the assembly so

and

for

both

installing

the

manufacturer's instructions. However,

adjust

and

tightening

their tension in accor-

blower is operating under load.

that

the

allows sufficient

the

prevent

slippage

Excessive

the

shaft

the

driver

belt

or

to

cor-

that

face

belts.

on-

tightening can lead to early bearing failures.

In

the

absence of belt manufacturer's instructions for

tensioning,

1.

2.

3.

the

following procedure may be used.

With

the

belts loose, pull the slack on all of

the

bottom

Adjust

motor position
appear to be
Thump
tighten

the

them

side of

belts with your fist.

the

seating

drive.

to

tighten belts until

in

the

sheave grooves.

If

more until they vibrate

them

to

they

they feel dead,

and

feel

springy when struck.

4.

Run-in
the
While running
appears in

5.

Stop
dividual belts
hand
deflect each belt only
face is even with

the

blower

the

motor

on

the

drive for a
as

instructed

adjust

the

slack side of

and

compare the tensions of

by

pressing down firmly with one

top surface.

short

period, after preparing

in a following paragraph.

until only a very

the

belts.

It

should be possible to

to

the

point where

the

bottom of the other

slight

its

the

top

bow

in-

sur-

underdeflected belts.

6.

A new

set

of belts should be first tensioned about

Va

greater
wear-in. Before
operation, increase

than

normal

putting

to

allow for

the

drive into normal

the

tension as obtained above
by a small amount. Recheck after each 8 hour
operating period during
just

as

necessary.

Before operating

the

the

first 50 hours and, ad-

drive under power to check in­itial belt tension, first remove covers from
nections. Make sure
the

shaft

by hand. Place a coarse screen over
nection to
while

prevent

it

is operating,
discharge opening.
under

LUBRICATION.

Before connecting

the

interior is still clean,

anything being sucked into the blower

and

avoid

Put

oil

in

the

PIPING,

standing

sumps per instructions

remove

in line with

anti-rust compound from blower connections. Pipe used

than

these

should be no smaller

connections,
new piping throughout is strongly recommended.
tion, make sure
beads, or foreign materials of
against
filter is

damage to

not
backed with hardware cloth
tions. Make provisions
debris after a few hours' operation.
when

its

usefulness

deteriorate

it

is free of dirt, scale, cuttings, weld

any

kind. To further

the

blower, especially when an inlet

used, install a

and

small pieces going into the blower may

has

substantial

at

to

clean

ended,

as

screen of

or

near

the

this

screen of collected

It

should be removed

the

wire will eventually

cause serious damage.

Pipe flanges or male
connections accurately
correct misalignment

%

In

most

cases this will
impeller rubbing.
or

result

in a broken drive shaft.

ing should be supported near

In

threads

and

by

springing or cramping

distort

severe cases

must

squarely. DO NOT

the

blower casing
it

can prevent operation

For

the

blower

meet the blower

similar reasons, pip-

to
weight strains. Also, if pipe expansion is likely to occur
from temperature change, installation of flexible
tors

or expansion joints is advisable.

in

Figure 2 represents
tion with all accessory items
various operating conditions.

diagram form a blower installa-

that

might

be required under

Inlet

piping should be com­pletely free of valves or restrictions. When a shut-off
valve (not shown)
vacuum relief is installed near
protect

against blower overload caused

cannot

be avoided, make sure a full size

the

blower inlet. This will

by

ing.

~-i----~Cl

CHECK

I

VALVEJ

Figure 2 -

BACK-PRESSURE

REGULATOR

~

PRESSURE
VALVE

~MANUAL

r

Installation

ReliEF

VALVE

THERMOMETERS
PRESSURE

With

SILENCERS

OR

WITHIN
OF

BLOWER

INLET

FILTER

UNLOADING

INLET

SILENCER

&

GAUGES"

Accessories

stretch

the

blower con-

then

the

and

rotate

inlet con-

the

any

remaining

and

clean,

In

addi-

guard

16

mesh

inlet connec-

attempt

the

pipe.

and

cause

eliminate dead

connec-

accidental clos-

MUST

BE

FlANGE.

~

\

PIPE

MOUNTED

DIAMETER

ONE

to

5

Ii

ii:

i

Need for

and

pressure,

general

mended, especially

an

inlet

as

well

surroundings.

in

silencer will depend on blower

as

sound-level

An

inlet filter is normally recom-

dusty

or

requirements

sandy

locations, for blower

speed

in

the

protection. A discharge silencer is also normally sug-

gested

silencing

and
starting
pressure/vacuum
inlet
important
back-pressure
ly when volume

at
lower
through

units

necessary.

ing type,
blower
against
material

rotate
with

strain, excessive
DO
lubricated

for RCS blowers. Specific recommendations

can

be

obtained

Discharge

piping

should include a

the

blower

gauges

and

discharge

checks on blower

regulator

demands

constant

In

output.

than

the

blower

the

manual

multiple blower

operate

These

with

and

header.

damage

with

should

one valve located

from

a common header,

back-flow

After

piping

is completed,

the

drive

shaft

uniform freedom, look for

belt

NOT

operate

the

per

instructions.

from

requires, a

manual

under

and

are

recommended

shown

vary

If

demand

output,

unloading

installations

be

of a

Properly

reverse

through

by

hand

tension

blower

the

nearest

pressure

unloading valve to

no-load conditions. Reliable

good

thermometers

to

allow

operating

in

Figure

while

is

constant,

excess

conditions. The

2 is useful main-

thE)

blower

may

valve.

where two

use

of check valve is

direct

acting

in

each line between

installed,

rotation

an

idle blower.

and

again.

uneven

or

at

this

Read

they

caused

before applying power,

If

it

mounting,

coupling misalignment.

time

unless

LUBRICATION

Sales Office.

relief valve,

permit

at

both

making

operates

but

somewhat

be blown off

or

more

or free swing-

will

protect

by

air

does

not

move

piping

it

has

been

on

the

the

and

sec-

tion.

LUBRICATION

A

very

simple lubrication

blowers. All friction

- are

lubricated

to

the

gears

and
above
through

main

the

the

by

oil

sumps

bearings

bearings.

bearings

the

provided below each

amount
Figures

air

ing. Lip

of oil

6 &

chamber

type

in

the

bearings. Refer

7.

Entrance

is

prevented

seals, located
headplate, effectively
small leakage
passes

into a
drained downward.
on

both

the

headplates.

the

into

the air chamber.

enable

Oil

the

sumps

removing

the

middle

Filling

blower

not

that

cavity

shafts

where

These

air

chamber

blower

on

top

plugs,

of

the

the

sumps

operating, in

In

They

to

each each

oil level gauge,

parts

and

From

and

retain

may

in

addition, sealing rings are

they

serve to reduce air leakage from or

and

handle

Item

system

- gears,

is employed

bearings

and

in

RCS

oil seals
action of oil slingers which dip in­causing

bearing

of

each

oil to

also

to

fill

the

these, oil flows,

to

the

oil seals. A

to

prevent
to

lubricating

by

the

use

of double

inboard

of

oil within

occur, should

headplate

splash

directly on

small reservoirs

by

drain

an

excessive

assembly

oil

into

drawings,

the

shaft

the

bearings

the

sumps.

the

seals wear,

that

is

vented

gravity,

port

blower

seal-

in

each

Any

provided

pass

through

also minimize oil carryover

are

not

the

inner walls of

sufficiently effective

into

gases, however.

end

of

the

blower are filled

(22),

and

filling

until

oil reaches

Item

(45). See

should be accomplished

order

to

obtain

the

correct oil

Figure

with

and

by

the

MAXIMUM

----+1

oPfRAilNG

LEVEL

M I

HIM

U M

----+I-'"

Figure 3 - Oil Level Gauge

level.

Approximate

the

various configurations are
overfill. A good
anti-foaming,

The

gauge

level
rise on
ing

somewhat

should

rust

level should

ring

when

the

gauge

on oil

not

be

permitted

ring.

in

During

the

the

first week of operation, check

oil sumps about once a day,

Replenish as necessary.

100 hours
500 hours

of

operation. Thereafter, change periods

may

be

remove plugs (22)

Ambient

Series

Above

90°F. (32°C)
32-90oF.
0-32°F. (-18-0

(0-32°C)

0

C)

Table

2 - Recommended Oil Grades

Gearbox

Fl.

Oz.

50

30
96

64

is

Table

OPERATION

to

3.

Before

time, recheck

reduce

ing
special conditions in

1.

Be
left

2.

Be
outdoor
is located so
strong
screen
TION

3.

Recheck
tightness
cent.

operating

the

the

likelihood of avoidable troubles.

procedure

certain

in

certain

list

that

the

blower air chamber.

that

intake

it
screen or grille.
at

the

is

strongly

blower leveling,

of all

If

belt drive is used,

oil

quantities

grade

of

industrial

inhibiting oil should

never

the

blower is

during

operation,

temperture

to

Oil

considered normal.

at

the

bottom.

required for blowers of

listed

in

Table

type

be

be allowed

rise above

should

to

fall below

not

operating.

to

an

and

blower speed,

the

and

watch for leaks.

be

changed after initial

In

draining

non-detergent,

extent

oil level gauge

Viscosity

SSU At tOO°F. (37.8°C)

1000-1200

700-1000
500-700

Drive

(Liters)

(1.48)
(.089)
(2.84)
(1.89)

Fl.

Oz.

30
18
64
32

3 - Oil Sump Capacities

a blower

unit

and

as

a guide,

the

no bolts, tools,

inlet

piping

witout

cannot

blower

under

the

installation

but

consider

installation.

rags

is free of

filter is used, be

pick

up

dirt

and

Use

of

the

temporary

as

described

under

power for

or

any

sure

is

recommended.

mounting

drive
bolts
adjust

alignment

if

installation

belt

tension

3.

Do

not

used.

the

It

may

depend-

but

the

oil levels

of

about

the

sumps,

Approximate

SAE

No.

50
40
30

End

(Liters)

(.089)
(0.53)

(1.89)

(0.95)

the

first

thoroughly

Use

the

follow-

any

other

dirt

have

been

debris.

protected

the

If

opening

by

protective

INST

ALLA-

and

is

not

correctly.

oil

it

to

an

a

re-

6