BOC Edwards 412-J User manual

5500 TABOR ROAD, PHILADELPHIA, PA. 1 9 1 2 0 U SA 2 1 5 -8 3 1 -5 4 0 0 FA X 215-831-5420
Copyright © 1999
All Rights Reserved
Revision 1.2
6-01
NEW POPPET VALVE ASSEM BLY
M ICROVAC PUM PM ICROVAC PUM P
M ICROVAC PUM PM ICROVAC PUM P
INSTRUCTIONSINSTRUCTIONS
INSTRUCTIONSINSTRUCTIONS
M ODEL :M ODEL :
M ODEL :M ODEL :
21 221 2
21 221 2 -- --J M ICROVA C PUM PJ M ICROV AC PUM P J M ICROV AC PUM PJ M ICROVA C PUM P
41 241 2
41 241 2 -- --J M ICROVA C PUM PJ M ICROV AC PUM P J M ICROV AC PUM PJ M ICROVA C PUM P
SERIA L NO.SERIA L NO.
SERIA L NO.SERIA L NO.
212212--JJ 4 1 241 2 --JJ

“ THE INFORMATION HEREIN SHALL BE TREATED IN“ THE INFORM ATION HEREIN SHALL BE TREATED IN
THE STRICTEST CONFIDENCE, AND SHALL NOT BETHE STRICTEST CONFIDENCE, AND SHALL NOT BE
DISCLOSED TO ANY THIRD PARTY WITHOUT THEDISCLOSED TO ANY THIRD PARTY WITHOUT THE
PRIOR WRITTEN PERM ISSION OFPRIOR WRITTEN PERM ISSION OF
THE INFORM ATION SHALL BE USED SOLELY FOR THETHE INFORM ATION SHALL BE USED SOLELY FOR THE
PURPOSE FOR WHICH IT HAS BEEN SUPPLIED ANDPURPOSE FOR WHICH IT HAS BEEN SUPPLIED AND
FOR NOFOR NO OTHER PURPOSE WHATSOEVER.”OTHER PURPOSE WHATSOEVER.”

J SERIES M ICROVA CJ SERIES M ICROVA C VACUVACUU M PUM PUM PUM P
TA BLE OF CON TENTSTABLE OF CON TEN TS
1.01.0 D ESCRIPTIONDESCRIPTION ______________________________________________________________________________________________________________________________________________ 11 --11
1.11.1 GGENERALENERAL (P(PRINCIPLE OFRINCIPLE OF OOPERATIONPERATION)) ____________________________________________________________________________________________________________________________ 11--11
1.21.2 GGASAS BBALLASTALLAST ________________________________________________________________________________________________________________________________________________________________ 11--22
1.31.3 WWATERATER SSYSTEMYSTEM ____________________________________________________________________________________________________________________________________________________________ 11--22
1.41.4 EELECTRICALLECTRICAL SSYSTEMYSTEM ______________________________________________________________________________________________________________________________________________________ 11--22
1.51.5 LLUBRICANTSUBRICANTS __________________________________________________________________________________________________________________________________________________________________ 11--22
1.61.6 GGUARDSUARDS ________________________________________________________________________________________________________________________________________________________________________ 11--22
1.71.7 VVACUUMACUUM BBREAK ANDREAK AND GGAGEAGE PPORTSORTS ________________________________________________________________________________________________________________________________ 11--22
2.02.0 INSTALLA TIONIN STALLA TION ____________________________________________________________________________________________________________________________________________ 22 --11
2.12.1 LLOCATING ANDOCATING AND MM OUNTINGOUNTING ____________________________________________________________________________________________________________________________________________ 22--11
2.22.2 VVACUUMACUUM PPIPINGIPING ____________________________________________________________________________________________________________________________________________________________ 22--11
2.2.1 Types of Piping Joints________________________________________________________________________ 2-2
2.2.2 Location of Gage Port ________________________________________________________________________ 2-2
2.32.3 EEXHAUSTXHAUST PPIPINGIPING ____________________________________________________________________________________________________________________________________________________________ 22--22
2.42.4 EELECTRICALLECTRICAL CCONNECTIONSONNECTIONS (S(SEEEE FFIGUREIGURE 5 & 5A)5 & 5A) __________________________________________________________________________________________________________ 22--33
2.52.5 CCOOLINGOOLING ______________________________________________________________________________________________________________________________________________________________________ 22--44
2.62.6 LLUBRICATION OFUBRICATION OF PPUM PUM P __________________________________________________________________________________________________________________________________________________ 22--44
3.03.0 OPERATIONOPERATION __________________________________________________________________________________________________________________________________________________ 33 --11
3.13.1 PPRERE--STARTSTART CCHECKHECK__________________________________________________________________________________________________________________________________________________________ 33--11
3.23.2 PPUM PUM P SSTARTTART__________________________________________________________________________________________________________________________________________________________________ 33--11
3.33.3 CHECKING OIL LEVELCHECKING OIL LEVEL ______________________________________________________________________________________________________________________________________________ 33--22
3.43.4 OPERATION OF GAS BOPERATION OF GAS BALLASTALLAST________________________________________________________________________________________________________________________________ 33--22
3.53.5 PUM P STOPPUM P STOP________________________________________________________________________________________________________________________________________________________________ 33--33
3.63.6 OPERATING NOTESOPERATING NOTES __________________________________________________________________________________________________________________________________________________ 33--33
4.04.0 CHECKINGCHECKIN G______________________________________________________________________________________________________________________________________________________ 44 --11
4.14.1 PPOOROOR VVACUUMACUUM ______________________________________________________________________________________________________________________________________________________________ 44--11
4.24.2 LLOCALIZINGOCALIZING LLEAKAGEEAKAGE ____________________________________________________________________________________________________________________________________________________ 44--11
4.34.3 RREPAIRINGEPAIRING SSM ALLM ALL LLEAKSEAKS ______________________________________________________________________________________________________________________________________________ 44--11
4.44.4 PPUM PUM P AACTIVITYCTIVITY RRECORDECORD ______________________________________________________________________________________________________________________________________________ 44--11
5.05.0 TROUBLESHOOTING GU ITROUBLESHOOTING GUIDED E __________________________________________________________________________________________________________________ 55 --11
6.06.0 SPECIFICATIONS A N DSPECIFICATIONS AND PA RTS LIPA RTS LISTST ____________________________________________________________________________________________________ 66 --11
6.16.1 212212--J PJ PERFORM ANCEERFORM ANCE CCURVEURVE ________________________________________________________________________________________________________________________________________ 66--11
6.26.2 MM ICROVACICROVAC MM ODELODEL 212212--J SJ SPECIFICATIONSPECIFICATIONS ____________________________________________________________________________________________________________________ 66--11
6.36.3 412412--J PJ PERFORM ANCEERFORM ANCE CCURVEURVE ________________________________________________________________________________________________________________________________________ 66--33
6.46.4 MM ICROVACICROVAC MM ODELODEL 414122--J SJ SPECIFICATIONSPECIFICATIONS ____________________________________________________________________________________________________________________ 66--33
7.07.0 M A INTEN A N CEM AIN TENANCE ________________________________________________________________________________________________________________________________________ 77 --11

J SERIES M ICROVA CJ SERIES M ICROVA C VACUUM PU M PVACUUM PU M P
PAGE 1-1
1.01.0 DESCRIPTIONDESCRIPTION
1.11.1 General (Principle of Operation)General (Principle of Operation)
The Stokes J Series Microvac Pumps are self-contained, rotary, oil sealed piston type units. An eccentric mounted on
the drive shaft drives the piston. Tw o floating hinge bars that are free to oscillate in the pump housing guide the piston
slide. The piston assembly rotates clockwise when facing the drive end. Air enters the pump through the intake and
passes through the piston slide as the piston performs its intake stroke. As the piston nears the top center position the
intake port is closed, separating the system from the pump (See Figure 1). At this point the air is entrapped in front of
the piston as it begins the next stroke. As the piston continues to rotate the entrapped air is compressed and
discharged through the exhaust valves and out the reservoir exhaust outlet. The exhaust valves are of a 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 internal oil passages to the shaft bearings. The oil is then fed into the pump to
provide the necessary piston-to-cylinder oil seal. The oil in the pumping chamber is forced out through the exhaust
valves w ith the compressed air and returns to the reservoir. A solenoid valve automatically prevents oil from flooding
the pump in the event of a pow er failure, or w hen the pump is shutdow n w ithout vacuum being broken.
M ODEL 212M ODEL 212 --J M ODEL 412J M ODEL 41 2 --JJ
FIGURE 1 PUM P CROSS SECTION VIEWFIGURE 1 PUM P CROSS SECTION VIEW
LIGHT ECCEN TRIC (FA R SIDE)
HEA VY EC CEN TRIC (N EAR SID E)
PISTON
A SSEM BLY
OI L M AN IFO LD
VALV E D ECK G AS KET
HINGE BAR S PA CER
IN TA KE
HINGE BAR
OIL
RESERV OIR
COVER
RESERV OIR COV ER
O-RING
OIL SEPA RA TOR
GA SKET
PU M P H OU SIN G
O-RING
EX HA U ST
SLIDE
PISTON
OIL M A NIFOLD
ASSEM BLY
OIL RESERVOIR
COVER
EX HA U ST
VALVE DECK GASKET
HINGE BAR
IN TAKE
SLIDE
LIGHT ECCEN TRIC (FAR SIDE)
HEA VY ECCENTRIC (N EA R SID E)

J SERIES M ICROVA CJ SERIES M ICROVA C VACUUM PU M PVACUUM PU M P
PAGE 1-2
1.21.2 Gas BallastGas Ballast
WARN IN G:WARN IN G: NEVER USE GAS BALLASNEVER USE GAS BALLAST WHEN PUM PING GASEST WHEN PUM PING GASES OR GAS M IXTURESOR GAS M IXTURES THATTHAT
ARE EXPLOSIVE OR FARE EXPLOSIVE OR FLAM M ABLE.LAM M ABLE.
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 water vapor or other gaseous components enter
the pump and condense w ithin 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 w ater. Gas Ballast is a controlled bleed of inert gas or air from
the atmosphere into the compression chamber of the pump. The ballast gases prevent water vapor from
condensing and mixing w ith the oil during the compression cycle. Other contaminates are also removed by
ballasting except those that dissolve in the oil.
1.31.3 Water SystemWat er Syst em
A supply of cooling w ater at 85oF. (30o C) and 1-1/2 G.P.M . (5.7 LPM ) for the 212-J and 2 G.P.M . (7.6 LPM ) for
the 412-J maximum is needed at the w ater inlet for efficient performance. Water pressure should not exceed 35
PSIG in the pump. See Section 2.5 for additional information.
1.41.4 Electrical SystemElectrical System
The main pow er supply is 230/460V., 60 Cy., 3 Ph. and should be w ired through a suitable fused motor starter.
Pow er for the oil solenoid is taken from any two of the motor leads. Check both motor and solenoid nameplates
to insure proper voltage.
1.51.5 Lubricant sLubricants
Refer to Section 2 for recommended pumping fluids.
1.61.6 GuardsGuards
The standard pump has a totally enclosed belt guard and flyw heel guard to cover the motor pulley, pump pulley, belts and
flyw heel.
1.71.7 Vacuum Break and Gage PortsVacuum Break and Gage Ports
The pump is provided w ith a ½” FPT Vacuum Break and a ¼” FPT Gage Port, as shown in Figure 7.
IM PORTANT:IM PORTANT: When using Gage PortWhen using Gage Port, provide a 90, provide a 90°° elbow and at least 12” (305 mm) of vertical pipe to the gageelbow and at least 12” (305 mm) of vertical pipe to the gage
sensor to reduce the chance of contaminating the gage with pump lubricants.sensor to reduce the chance of contaminating the gage with pump lubricants.

J SERIES M ICROVA CJ SERIES M ICROVA C VACUUM PU M PVACUUM PU M P
PAGE 2-1
2.02.0 IN STALLA TIONINSTALLA TION
2.12.1 Locating and M ount ingLocating and M ounting
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. M ount the pump to foundation
w ithout putting a strain or tw ist in the pump housing. See Figure 7 for foundation
mounting dimensions.
2.1.3 Remove cap from exhaust and intake openings only when ready to make a piping
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 the
w ater jacket through the housing drain plug to prevent cracking the housing, blow
out the w ater jacket. Follow this same procedure for storage.
2.22.2 Vacuum PipingVacuum Piping
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 will be seriously
decreased. When connecting the pump to the system, provide a vertical pipe at least 2 ft.
(610 mm) 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 between pump intake and
vacuum piping to reduce vibration.(See Figures 2 & 3).
FIGURE 2FIGURE 2
PUM P BELOW SYSTEMPUM P BELOW SYSTEM
FIGURE 3FIGURE 3
PUM P ABOVE SYSTEMPUM P ABOVE SYSTEM

J SERIES M ICROVA CJ SERIES M ICROVA C VACUUM PU M PVACUUM PU M P
PAGE 2-2
A high vacuum valve (full opening type preferred) is recommended to facilitate start-up and for checking pump
blank off pressure.
CAUTION:CAUTION: M ake sureM ake sure the system to be evacuated and connecting lines are clean and free of weld splatter, dirt orthe system to be evacuated and connecting lines are clean and free of weld splatter, dirt or
grit. Foreign matter entering the pump can cause failure and possibly damage the internal parts. Togrit. Foreign matter entering the pump can cause failure and possibly damage the internal parts. To
prevent this it is recommended that a 16 mesh w ire screen beprevent this it is recommended that a 16 mesh w ire screen be installed at the inlet connection. After 20installed at the inlet connection. After 20
hours of operation the screen must be removed.hours of operation the screen must be removed.
2.2.1 Types of Piping Joints
A. Standard wrought piping with welded joints makes the best vacuum piping system.
B. Copper piping with sweated fittings and joints can also be made vacuum tight and has the advantage of
providing a neat, clean vacuum installation.
C. Standard threaded piping, however, is satisfactory and more readily installed. The piping should be
carefully hammered to loosen any scales or chips. Blow out any resultant debris w ith compressed air
prior to installation. All male threaded joints should be carefully doped, screw ed tight and NEVER
“ backed-off” to make parts align -this is apt to cause a leak. Paint the joints while the system is under
vacuum until the paint is no longer draw n in, G.E. 1201-B, Glyptal or equivalent is recommended for
painting all connections.
2.2.2 Location of Gage Port
A vacuum gage connection is located at the upper left hand side of intake side of the pump. (See Figure 7). The
1/4" pipe plug found at this location should be replaced w ith a small vacuum ball valve to w hich the gage can be
connected. When a Stokes McLeod Gage is used a synthetic, thick wall, smooth bore tubing, such as
Tygon,makes a very satisfactory flexible connection. To prevent oil from entering the gage, locate the gage
approximately 2 ft. (610 mm) above the port.
2.32.3 Exhaust PipingExhaust Piping
CAUTION:CAUTION: Never place a valve in the exhaust line. If a valve must be installed in the line, a relief valve must alsNever place a valve in the exhaust line. If a valve must be installed in the line, a relief valve must also beo be
inserted in the line betw een the reservoir and the valve. The relief valve should be equal in size to theinserted in the line betw een the reservoir and the valve. The relief valve should be equal in size to the
line, and set to open at 2 psig.line, and set to open at 2 psig.
2.3.1 It is recommended that the exhaust be piped horizontally a short distance and tied into a vertical
exhaust pipe. The vertical exhaust pipe must be at least 12" (305 mm) long w ith the bottom end
terminated with a plug or a drain cock to allow removal of moisture and contaminated oil before
it can accumulate sufficiently to drain back into the pump oil reservoir. See Figure 4.
EX HA UST PIPIN G FIGURE 4EX HA UST PIPIN G FIGURE 4

J SERIES M ICROVA CJ SERIES M ICROVA C VACUUM PU M PVACUUM PU M P
PAGE 2-3
2.3.2 The exhaust pipe should be no smaller than the exhaust outlet and as short as possible. Pump
exhaust will contain a small amount of oil and should be handled in a manner consistent with
applicable regulations. If exhausted outside of the building point the end of the exhaust pipe
dow nw ard to prevent the entrance of rain w ater.
2.3.3 Closed circuit Oil M ist Separators are available from Stokes w hich can eliminate oil fog in the
majority of applications. The separator w ill not remove noxious or toxic gases and must be run
to a suitable trap. Consult Stokes Vacuum for specifications.
2.42.4 Electrical Connections (See Figure 5 & 5A )Electrical Connect ions (See Figure 5 & 5A)
CAUTION:CAUTION: Make sure pump is properly lubricated before starting.M ake sure pump is properly lubricated before starting.
2.4.1 Install a motor starter w ith safety device w ithin easy reach of the operator.
2.4.2 Connect the solenoid valve as in Figure 5 & 5A.
2.4.3 Connect motor so that pump shaft rotates clockw ise w hen viewed from drive end.
See 3.1 for Pre-Start Check.
IM PORTANT:IM PORTANT: M akM ake sure the proper voltage, starters and overloads are supplied to the motor.e sure the proper voltage, starters and overloads are supplied to the motor.
M ake sure that the solenoid coil leads are connected for proper voltage. BothM ake sure that the solenoid coil leads are connected for proper voltage. Both
may fail to operate if voltage is less than 90% of rated.may fail to operate if voltage is less than 90% of rated.
FIGURE 5FIGURE 5
WIRING DIAGRAMWIRIN G DIAGRAM

J SERIES M ICROVA CJ SERIES M ICROVA C VACUUM PU M PVACUUM PU M P
PAGE 2-4
2.52.5 CoolingCooling
2.5.1 The Stokes M icrovac pump is w ater cooled and must be connected to a
w ater supply.
2.5.2 The 1/2" water inlet connection is located in the pump housing on the drive side
near the bottom. See Figure 7.
2.5.3 Insert a valve in the water inlet line and regulate the w ater flow so that the
temperature of the oil in the reservoir is between 140 Deg. and 160 Deg. F. (60 -71
Deg. C) Oil temperature kits are available that automatically control the w ater flow
to maintain the proper oil temperature (Contact Stokes Vacuum for specifications).
If pump is outside and subjected to freezing temperatures, the water tank and
circulating pump should be installed with anti-freeze in the water.
CAU TION:CAU TION: DO NOT START THE PUM P WHEN ODO NOT START THE PUM P WHEN OIL TEM PERATURE IS BELOW 55IL TEM PERATURE IS BELOW 55oo F. (13F. (13oo C)C)
2.5.4 The 1/2" water outlet is located in the pump housing on the opposite side of the
w ater inlet. See Figure 7.
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 SHOULDSHOULD
NOTNOT be a valve or back pressure in the drain line. In some cases, cooling w ater
must be discharged to a pressure drain. In such cases, discharge pressure must
not exceed 35 P.S.I.G. and no block valve should be placed in discharge line unless
a 35 lb. relief valve is provided to protect pump from high inlet pressure.
NOTE:NOTE: If condensables are present in gas being pumped and gas ballast is used, throttleIf condensables are present in gas being pumped and gas ballast is used, throttle thethe
cooling water to raise operating temperature to the level for gas ballast (See Sect. 3)cooling water to raise operating temperature to the level for gas ballast (See Sect. 3)
2.62.6 Lubrication of PumpLubrication of Pum 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 Stokes 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
FIGURE 5 A WIRIN G DIAGRAMFIGURE 5 A WIRIN G DIAGRAM

J SERIES M ICROVA CJ SERIES M ICROVA C VACUUM PUM PV ACUU M PUM P
PAGE 2-5
protection, containing detergent dispersants, w ith excellent flow characteristics at low temperature. It has a
viscosity of 430 SSU at 100 Deg. F. (38 Deg. C), and 82 SSU at 210 Deg. F. (99 Deg. C), w ith a vapor
pressure of 0.0001 mm Hg. at 145 Deg. F. (63 Deg. C)
If the pump is to be operated at vacuum levels that cause the oil temperature to exceed 160 Deg. F. (71 Deg. C)
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. (94 Deg. C).
Special operating conditions may require the use of special oils. Consult Stokes Vacuum for specific
recommendations when other than regular petroleum oils are being used.
2.6.12.6.1 INITIAL FILLINITIAL FILL
The M icrovac pump is shipped with an initial charge of oil, (4 gallons)(15 L) for the 212J and (12
gallons)(45 L) for the 412J, in the reservoir. Before connecting the suction manifold slow ly rotate
the pump thru two revolutions. This w ill distribute the oil throughout the pump interior.
CAU TION:CAU TION: STARTING THE M ICROVAC PUM P WHEN OIL TEM PERSTARTING THE M ICROVAC PUM P WHEN OIL TEM PERATURE IS BELOW 55ATURE IS BELOW 55
DEG. F., (13 DEG. C) CAN RESULT IN EXCESSIVE WEAR AND GALLING DAMAGE TODEG. F., (13 DEG. C) CAN RESULT IN EXCESSIVE WEAR AND GALLING DAMAGE TO
THE M OVING PARTS.THE M OVING PARTS.