STOKES VACUUM 148-10 User manual

5500 TABOR ROAD PHILADELPHIA , PA 19120

EST. 1895

M ICROVAC PUM PM ICROVAC PUM P

OPERATINGOPERATING

INSTRUCTIONSINSTRUCTIONS

Rev. 1.0Rev. 1.0

9-989-98

ISO 9 00 1ISO 9 00 1

QUALITY SYSTEMQUALITY SYSTEM

CERTIFIEDCERTIFIED

ACCREDITED BY THEACCREDITED BY THE

DUTCH COUNCILDUTCH COUNCIL

FOR CERTIFICATIONFOR CERTIFICATION

19941994

M OD EL 146 -H1 3

M ICROVAC PU M P

M OD EL 148 -H10

M ICROVAC PU M P

M OD EL 149 -H11

M ICROVAC PU M P

M OD EL 21 2 -H11

M ICROVAC PU M P

M OD EL 412 -H11

M ICROVAC PU M P

M ICROVAC PUM PM ICROVAC PUM P

OPERA TIN G INSTRUCTION SOPERATING IN STRUCTIONS

SERIA L NO. __-________SERIA L NO. __-________

STOKES VACUUM M ICROVACSTOKES VACUUM M ICROVAC

VACUUM PUM PVACUUM PUM P

NOTE:NOTE:

"THE INFORM ATION HEREIN SHALL BE TREATED IN THE

STRICTEST CONFIDENCE,

AND SHALL NOT BE

DISCLOSED TO ANY THIRD PARTY WITHOUT THE PRIOR

WRITTEN PERM ISSION OF

STOKES VACUUM , INC.STOKES VACUUM , INC.

THIS INFORM ATION SHALL BE USED SOLELY FOR THE

PURPOSE FOR WHICH IT HAS BEEN SUPPLIED AND FOR

NO OTHER PURPOSE

WHATSOEVER."

STOKES VACUUM , INC., PHILA DELPHIA, PASTOKES VACUUM , INC., PHILA DELPHIA, PA

STOKES VACUUM M ICROVACSTOKES VACUUM M ICROVAC

VACUUM PUM PVACUUM PUM P

Sect ionSect ion PagePage

1.01.0 D ESCRIPTIONDESCRIPTION

1.1 General 1-1

1.2 Gas Ballast 1-1

1.3 Water System 1-2

1.4 Electrical System 1-2

1.5 Lubricants 1-2

1.6 Guards 1-2

1.7 Vacuum Break & Gage Ports 1-2

2.02.0 IN STA LLA TIONIN STA LLA TION

2.1 Locating and Mounting 2-1

2.2 Vacuum Piping 2-1

2.3 Exhaust Piping 2-2

2.4 Electrical Connections 2-3

2.5 Cooling 2-4

2.6 Lubrication of Pump 2-4

3.03.0 OPERA TIONOPERA TION

3.1 Pre-Start Check 3-1

3.2 Pump Start 3-2

3.3 Checking Oil Level 3-2

3.4 Operation of Gas Ballast 3-2

3.5 Pump Stop 3-3

3.6 Operating Notes 3-4

4.04.0 CHECKINGCHECKIN G

4.1 Poor Vacuum 4-1

4.2 Localizing Leakage 4-1

4.3 Repairing Small Leaks 4-1

4.4 Pump Activity Record 4-2

5.05.0 TROU BLESHOOTING GUID ETROU BLESHOOTING GUID E 5-15-1

6.06.0 SPECIFICATIONS AN D PARTS LISTSPECIFICA TION S AND PA RTS LIST

7.07.0 M A IN TEN A NCEM AIN TEN A N CE

8.08.0 STOKES SU PPLEM EN TA RY D ATASTOKES SUPPLEM ENTARY DATA

Parts Ordering Information

Recommended Replacement Parts Kit

Stokes M icrovac 2-Year Warranty

Pumping Hazardous Gases Sheet

Pumping Fluids, Lubricants and Grease Bulletin

STOKES VACUUM M ICROV A CSTOKES VACUUM M ICROV A C

VACU U M PUM PVACU U M PUM P

BULLETINBULLETIN

CHECK YOUR M ICROVAC PUM PCHECK YOUR M ICROVAC PUM P

RESERVOIR SIGHT GLASS GAGE TO SEE IFRESERVOIR SIGHT GLASS GAGE TO SEE IF

YOUR PUM P WAS SHIPPED WITH ANYOUR PUM P WAS SHIPPED WITH AN

INITIAL CHARGE OF OIL AND/OR IF THE OILINITIAL CHARGE OF OIL AND/OR IF THE OIL

WAS SHIPPED IN SEPARATEWAS SHIPPED IN SEPARATE

CONTAINERS.CONTAINERS.

REFER TO PAGE 2-4 INITIAL FILLREFER TO PAGE 2-4 INITIAL FILL

1-11-1

STOKES VACUUM M ICROVACSTOKES VACUUM M ICROVAC® VACUUM PUM PVACUUM PUM P

SECTION 1.0

SECTION 1.0 DESCRIPTION

DESCRIPTION

1.01.0 D ESCRIPTIONDESCRIPTION

1.11 .1 GEN ERAL (Principle of Operation)GEN ERAL (Principle of Operation)

The Stokes Microvac Pump is a self-contained, rotary, oil sealed piston type unit. The piston is driven by an

eccentric mounted on the drive shaft and the piston slided is guided by tw o floating hinge bars that are free

to oscillate in the pump housing. Facing the drive end, the piston assembly rotates clockw ise. Air enters the

pump through the intake and then through the piston slide until the piston completes its stroke. At this point

all air previously entrapped is in front of the piston as it begins another stroke. As the piston continues to

rotate, the air in front of it is compressed and discharged through the exhaust valve and finally out the

exhaust outlet. As the piston nears the top center position the intake port is closed, separating the system

from the pump (See Figure 1). The exhaust valves are of the corrosion-resistant, heavy duty, poppet type.

When the pump is in operation, lubrication of the internal parts is completely automatic. Oil is forced by

atmospheric pressure from the reservoir through the oil lines to the shaft bearings. The oil is then fed into

the pump to provide the necessary piston-to-cylinder oil seal. Finally, the oil is forced out through the

exhaust valve with the air and returns to the reservoir. A solenoid valve automatically prevents oil from

flooding the pump in the event of a power failure, or when the pump is accidentally shutdown w ithout

vacuum being broken.

1.21 .2 GA S BALLA STGA S BALLA ST

The pump is provided w ith a manually operated gas ballast valve to overcome the adverse affect on vacuum

resulting from oil contamination. Contamination occurs when w ater vapor or other gaseous components

enter the pump and condense within the pump mixing with the oil as emulsified droplets. The condensate

w ill mix w ith the oil and “ flash” into vapor again as the oil circulates into high vacuum in the pump cylinder

limiting the vacuum to the vapor pressure of the condensed water. Gas Ballast is a controlled bleed of air

from the atmosphere. This air caries the w ater vapor through the compression cycle w ithout it condensing

to liquid and mixing w ith oil. Thus, the w ater vapors are exhausted without contaminating the pump oil.

Other contaminates are also removed by ballasting except those that dissolve in the oil.

FIGU RE 1 PUM P CROSS SECTIONFIGU RE 1 PUM P CROSS SECTION

M OD EL 146 -13M OD EL 146 -13 M OD EL 148 -10M OD EL 148 -10

M OD EL 1 49 -1 1 & 21 2 -11M OD EL 1 49 -1 1 & 21 2 -11 M OD EL 412 -11M OD EL 412 -11

1-21-2

STOKES VACUUM M ICROVACSTOKES VACUUM M ICROVAC® VACUUM PUM PVACUUM PUM P

SECTION 1.0

SECTION 1.0 DESCRIPTION

DESCRIPTION

NOTE:NOTE: N ever use gas ballast w hen pumping gases or gas m ixtures that are

explosive or f lam mable.

1.3 WA TER SY STEM (1 49-1 1, 2 1 2-1 1, 41 2-1 1 ON LY)1.3 WA TER SY STEM (1 49-1 1, 2 1 2-1 1, 41 2-1 1 ON LY)

A supply of cooling w ater at 85oF. and * G.P.M . maximum is needed at the water inlet for efficient perfor-

mance. See Section 2.5 for additional information.

* 149-011 1 GPM M AXIM UM

* 212-011 1-1/2 GPM M AXIM UM

* 412-011 2 GPM M AXIM UM

1.41 .4 ELECTRICAL SY STEMELECTRICAL SYSTEM

The main pow er supply is 230/460V., 60 Cy., 3 Ph. and should be wired through a suitable fused motor

starter. Pow er for the oil solenoid is taken from any tw o of the motor leads. Check both motor and sole-

noid nameplates to insure proper voltage.

1.51 .5 LU BRICA NTSLUBRICAN TS

Refer to Section 2 for recommended high vacuum grease and pumping fluids.

1.61 .6 GU ARD SGU ARD S

The standard pump is w ith a totally enclosed belt guard to cover the motor pulley, pump pulley and belts.

14 6, 14 8, 1 4 9 NOTE:146, 1 48 , 1 49 N OTE: ALSO ENCLOSED FLYWHEEL GUARDS ARE INCLUDED ASALSO ENCLOSED FLYWHEEL GUARDS ARE INCLUDED AS

STANDARD EQUIPM ENT.STANDARD EQUIPM ENT.

1.71 .7 V ACU UM BREA K & GAGE PORTSVA CU UM BREAK & GA GE PORTS

The pump is provided w ith a: 146-13 & 148-10 1/4" FPT Gage Port; 149-11,

212-11 & 412-11 l/2" FPT Vacuum Break & a l/4" FPT

Gage Port, as shown in Fig. 11.

IM PORTA N T:IM PORTA N T: When using Gage Port, provided a 9 0When using Gage Port, provided a 9 0 oo elbow and at least 1 2"elbow and at least 1 2"

of vert ical pipe t o the gage sensor.of vert ical pipe t o the gage sensor.

2-12-1

STOKES VACUUM M ICROVACSTOKES VACUUM M ICROVAC® VACUUM PUM PVACUUM PUM P

SECTION 2.0

SECTION 2.0 INSTALLATION

INSTALLATION

2.02.0 IN STA LLA TIONINSTA LLA TION

2.12 .1 LOCATING AN D M OU NTINGLOCA TIN G AN D M OUN TIN G

Locate the pump as near as possible to the equipment being evacuated so that the Vacuum, Water and

Exhaust connections can be conveniently made. Provide for adequate space for convenient servicing where

possible.

2.1.2 The pump should be mounted on a rigid foundation, such as a concrete floor, and made level by

shimming or grouting, if necessary. Bolt pump to foundation without putting a strain or tw ist in the pump

housing. See Figure 12 for foundation bolting dimensions.

2.1.3 Remove cap from exhaust and intake openings only w hen ready to make a pipe connection. Also

remove the plastic plug (by unscrew ing) from the Gas Ballast valve. When pump is to be subjected to

temperatures below freezing, drain w ater jacket through the housing drain plug to prevent cracking the

housing, then blow out w ater jacket. Follow this same procedure for storage.

2.22 .2 V ACU UM PIPIN GVA CU UM PIPIN G

Be sure all vacuum piping is tight.Be sure all vacuum piping is tight. All pipe lines should be as short as possible and should be no smaller

than the inlet to the pump. (If it is absolutely necessary to run a long line, the pipe size should be increased

50% in diameter, or more, than the inlet to the pump.) Conductance of long lines must be checked and the

line sized large enough or pumping speed of system w ill be seriously decreased. When connecting pump to

the system, provide a vertical pipe at least 2 ft. long betw een the pump and the system, if the pump is

below the system inlet. If the pump is above or level w ith the system inlet, provide an inverted “ U” pipe to

serve as a trap for dirt from the system and to prevent migration of pump oil tow ard the system inlet. Be

sure all vacuum piping is tight. If an inline filter is being used it should be installed as noted below . It is

advisable to install a flexible connection betw een pump intake and vacuum piping to eliminate vibration.

(See Figures 2 &3).

A high vacuum valve (full opening type preferred) is recommended to facilitate start-up and for checking

pump blank off pressure.

CA U TION:CA U TION: M ak e sure t he syst em t o be evacuated and connect ing lines areM ake sure the syst em t o be evacuated and connect ing lines are

clean and f ree of w eld splat ter, dirt, or grit . Foreign mat terclean and f ree of w eld splat ter, dirt, or grit . Foreign mat ter

ent ering t he pum p can cause f ailure and possibly damage theent ering t he pum p can cause f ailure and possibly damage the

int ernal parts. To prevent this it is recom mended that a 1 6 meshint ernal parts. To prevent this it is recom mended that a 1 6 mesh

w ire screen be inst alled at the inlet connection. Af ter 20 hours ofw ire screen be inst alled at the inlet connection. Af ter 20 hours of

operat ion t he screen m ust be rem oved.operat ion t he screen m ust be rem oved.

FIGU RE 2FIGU RE 2

PU M P BELOW SYSTEMPU M P BELOW SYSTEM

FIGU RE 3FIGU RE 3

PU M P ABOV E SYSTEMPUM P A BOV E SY STEM

2-22-2

STOKES VACUUM M ICROVACSTOKES VACUUM M ICROVAC® VACUUM PUM PVACUUM PUM P

SECTION 2.0

SECTION 2.0 INSTALLATION

INSTALLATION

2.2.12.2.1 TYPES OF PIPING JOINTSTYPES OF PIPING JOINTS

A. Standard w rought piping with w elded joints makes the best vacuum piping system.

B. Copper piping w ith sw eated fittings and joints can also be made vacuum tight and has the

advantage of providing a neat, clean vacuum installation.

C. Standard threaded piping, how ever, is satisfactory and more readily installed. The piping

should be carefully hammered to loosen any scales or chips. Blow out the resultant w ith

compressed air prior to installation. All male threaded joints should be carefully doped,

screw ed up tight and NEVER “ backed-off” to make parts align - this is apt to cause a leak.

Paint the joints w hile the system is under vacuum until the paint is no longer drawn in, G.E.

1201-B, Glyptal or equivalent is recommended for painting all connections.

2.2.22.2.2 LOCATION OF GAGE PORTLOCATION OF GAGE PORT

A vacuum gage connection is located at the upper left hand side of intake side of pump. (See Figure

12). The pipe plug found at this location should be replaced with a small vacuum ball valve to w hich

the gage can be connected. When a Stokes McLeod Gage is used a synthetic, thick w all, smooth

bore tubing, such as Tygon, makes a very satisfactory flexible connection.

2.32 .3 EX HA UST PIPIN GEX HA UST PIPIN G

2.3.1 It is recommended that the exhaust be piped horizontally as short distance and tied into a vertical

exhaust pipe. The vertical exhaust pipe must be at least 1 ft. (12 inches) long and the bottom end of the

vertical exhaust pipe terminated w ith a plug or a drain cock to allow removal of moisture and contaminated

oil before it can accumulate sufficiently to drain back into pump oil reservoir. See Figure 4.

2.3.2 The exhaust pipe should be no smaller than the exhaust outlet and as short as possible. Run the

pipe outside the building w here the pump exhaust vapors w ill not be objectionable. Point the outside end of

the exhaust pipe downw ard to prevent the entrance of rain water.

2.3.3 Closed circuit Oil M ist Separators are available from Stokes which can eliminate oil fog in the

majority of applications. The separator will not remove noxious or toxic gases and must be run outside the

building. For operating continually under conditions of higher pressure an electro-static precipitator is

recommended. Contact Stokes for specifics.

CA U TION:CA U TION: NEVER PLACE A V ALV E IN THE EX HAU ST LIN E. IF A VALV ENEV ER PLA CE A VA LVE IN THE EX HA U ST LINE. IF A V ALV E

M UST BE INSTA LLED IN THE LIN E, A RELIEF V ALV E M U ST A LSOM UST BE INSTA LLED IN THE LIN E, A RELIEF V ALV E M U ST A LSO

BE IN SERTED IN THE LIN E BETWEEN THE RESERVOIR AN D THEBE IN SERTED IN THE LIN E BETWEEN THE RESERVOIR AN D THE

VA LVE. THE RELIEF VA LVE SHOULD BE EQU AL IN SIZE TO THEVA LVE. THE RELIEF VA LVE SHOULD BE EQU AL IN SIZE TO THE

LIN E, AN D SET TO OPEN A T 2 PSIG.LIN E, AN D SET TO OPEN A T 2 PSIG.

2-32-3

STOKES VACUUM M ICROVACSTOKES VACUUM M ICROVAC® VACUUM PUM PVACUUM PUM P

SECTION 2.0

SECTION 2.0 INSTALLATION

INSTALLATION

2.42 .4 ELECTRICAL CONN ECTIONS (See Figure 5)ELECTRICAL CONN ECTIONS (See Figure 5 )

CA U TION:CA U TION: BE SURE PU M P IS PROPERLY LU BRICA TED BEFORE STARTING.BE SU RE PUM P IS PROPERLY LUBRICATED BEFORE STARTING.

2.4.1 Install a motor starter w ith safety device within easy reach of the operator.

2.4.2 Connect the solenoid valve as in Figure 5.

2.4.3 Connect motor so that pump shaft rotates clockwise w hen view ed from driven end. See 3.1 for

Pre-Start Check.

NOTE:NOTE: M AKE SU RE THE PROPER VOLTAGE, STA RTERS AN D OV ERLOA DSM AKE SURE THE PROPER V OLTA GE, STA RTERS AN D OVERLOA DS

ARE SUPPLIED TO THE M OTOR. M AKE SU RE THA T THE SOLENOIDARE SUPPLIED TO THE M OTOR. M AKE SU RE THA T THE SOLENOID

COIL LEAD S ARE CONN ECTED FOR PROPER V OLTA GE. BOTH M AYCOIL LEAD S ARE CONN ECTED FOR PROPER V OLTA GE. BOTH M AY

FAIL TO OPERA TE IF V OLTA GE IS LESS THA N 90 % OF RATED .FAIL TO OPERA TE IF V OLTA GE IS LESS THA N 90 % OF RATED .

FIGU RE 5FIGU RE 5

WIRIN G D IAGRAMWIRIN G D IAGRAM

2-42-4

STOKES VACUUM M ICROVACSTOKES VACUUM M ICROVAC® VACUUM PUM PVACUUM PUM P

SECTION 2.0

SECTION 2.0 INSTALLATION

INSTALLATION

2.52 .5 COOLIN GCOOLIN G

FOR PUM P M ODELS 146-13 AND 148 -10 USE 2.5.1 THAT FOLLOWS. F0R 149-11, 212-11, AND 412-11FOR PUM P M ODELS 146-13 AND 148 -10 USE 2.5.1 THAT FOLLOWS. F0R 149-11, 212-11, AND 412-11

USE 2.5.1 THRU 2.5.5.USE 2.5.1 THRU 2.5.5.

2.5.1 This pump is air cooled and no w ater connections are necessary.

149-11, 212-11 & 412-11ONLY149-11, 212-11 & 412-11ONLY

2.5.1 This pump is w ater cooled and must be connected to a w ater supply.

2.5.2 The 1/2" w ater inlet connection is located in the pump housing on the drive side near the bottom.

2.5.3 Insert a valve in the w ater inlet line and regulate the water flow so that the temperature of the oil in

the reservoir is betw een 140 Deg. and 160 Deg. F. Oil temperature kits are available that automatically

control the w ater flow to maintain the proper oil temperature (Consult factory). If pump is outside and

subjected to freezing temperatures, w ater tank and circulating pump should be installed with anti-freeze in

the w ater.

CA U TION:CA U TION: DO NOT STA RT PU M P WHEN OIL TEM PERATU RE IS BELOW 5 5DO N OT START PU M P WHEN OIL TEM PERATU RE IS BELOW 5 5 oo F.F.

2.5.4 The 1/2" w ater outlet is located in the pump housing on the opposite side of the w ater inlet.

2.5.5 The w ater outlet SHOULDSHOULD be connected to an open drain to permit the operator to check the flow

and temperature of the outlet water periodically. There SHOULD NOTSHOULD NOT be a valve or back pressure in this

line. In some cases, cooling w ater must be discharged to a pressure drain. In such cases, discharge

pressure must not exceed 50 P.S.I.G. and no block valve should be placed in discharge line unless a 50#

relief valve is provided to protect pump from high inlet pressure.

NOTE:NOTE: IF COND ENSA BLES A RE PRESEN T IN GAS BEING PU M PED AN DIF COND EN SA BLES A RE PRESEN T IN GAS BEING PU M PED AND

GA S BALLA ST IS USED THROTTLE THE COOLING WA TER TO RA ISEGA S BALLA ST IS U SED THROTTLE THE COOLIN G WA TER TO RAISE

OPERA TIN G TEM PERA TU RE TO THE LEV EL N EEDED FOR GA SOPERA TIN G TEM PERA TU RE TO THE LEV EL N EEDED FOR GA S

BALLA ST (SEE SECT. 3 ).BALLA ST (SEE SECT. 3 ).

2.62 .6 LU BRICA TION OF PUM PLUBRICATION OF PU M P

The successful operation of this pump depends largely on the type of oil used. An initial charge of oil is

included w ith each pump. This standard oil is V-Lube (Label F) which is recommended for general operating

conditions in a relatively clean environment. The oil is a multigrade petroleum oil, fortified for oxidation

protection, containing detergent dispersants, w ith excellent flow characteristics at low temperature. It has

a viscosity of 430 SSU at 100 Deg. F., and 82 SSU at 210 Deg. F., with a vapor pressure of 0.0001 mm Hg.

at 145 Deg. F.

If the pump is to be operated at vacuum levels that cause the oil temperature to exceed 160 Deg. F. for

extended periods of time, a heavier grade oil should be used, Stokes V-lube (Label G) is available for oil

temperatures up to 200 Deg. F.

Special operating conditions may require the use of Special oils. We have listed the most used special

lubricants on the back page of the Bulletin enclosed, Greasing and Pumping Fluids for Vacuum Components.

Consult Stokes for specific recommendations when other than regular petroleum oils are being used.

2.6.12.6.1 INITIAL FILLINITIAL FILL

The microvac pump is shipped w ith an Initial charge of oil (* gallons) in the reservoir. Before connecting the

suction manifold slow ly rotate the pump thru tw o revolutions. This will distribute the oil throughout the

pump interior.

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