NVE MEC 5000 System manual

Owner’s Manual
&
Operating Instructions
MEC 5000/P MEC 6500/P MEC 8000/P
National Vacuum Equipment, Inc.

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© 2009 National Vacuum Equipment, Inc.
Revision 1 (release)
June 2010
No part of this manual may be reproduced without the written permission
of National Vacuum Equipment, Inc.

MEC 5000, 6500 & 8000/P | 3www.natvac.com | 800.253.5500
MEC 5000/P
MEC 6500/P
MEC 8000/P
Owner’s Record
Date of Purchase: _________________________
Purchased from: __________________________
Serial Number: ____________________________

4| MEC 5000, 6500 & 8000/P www.natvac.com | 800.253.5500

MEC 5000, 6500 & 8000/P | 5www.natvac.com | 800.253.5500
CONTENTS
Introduction
About National Vacuum Equipment, Inc........................5
Limited Warranty
Warranty.................................................6
Warranty Procedures.......................................8
The MEC Series Pumps
 PumpSpecications ......................................10
Performance ............................................11
System Requirements.....................................12
Operating Instructions
Installation ..............................................13
Lubrication procedure ....................................14
Automatic oil pump .......................................14
Adjusting the automatic oil pump ...........................15
Recommended lubrication .................................16
Normal operation for air cooled pumps.......................16
Maintenance ............................................17
Determining the rotation of the pump .......................18
Troubleshooting
Pump overheats .........................................19
Too much oil use .........................................19
Pump doesn’t turn. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
No vacuum or pressure in tank .............................19

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Pump Rebuilding
Vane replacement ........................................20
Complete rebuild .........................................26
Parts List - MEC /P Series Pumps
Parts List ...............................................32
Parts Diagram ...........................................34
Ballast Check Valve Parts List ..............................35
Ballast Check Valve Diagram ...............................35
Parts Details - Lubrication Systems
Automatic Lubrication System ..............................36
Automatic Oil Pump.......................................40
Gear-Type Lubrication System ..............................42

MEC 5000, 6500 & 8000/P | 7www.natvac.com | 800.253.5500
INTRODUCTION
General Information
About National Vacuum Equipment
Congratulations! You now own a quality vacuum/pressure pump proudly
manufactured in the U.S.A. by National Vacuum Equipment, Inc. You have
not only acquired a superior piece of equipment from a qualied dealer,
you have hired a team of vacuum experts. We stand ready to work with
your dealer to answer your questions and provide you with the information
necessary to keep your equipment in peak working condition.
Thank you for using National Vacuum Equipment.
Our Mission
NVE is dedicated to the manufacture and wholesale distribution of quality
vacuum system products at a reasonable price and delivered on a timely
basis. NVE is a “one-stop shop” for manufacturers and distributors of
vacuum equipment.
Our History
National Vacuum Equipment, Inc. was founded in 1980 by Bruce Luoma.
NVE started as a retailer of vacuum pumps. Soon after it started, NVE
secured the rights to exclusive distribution of the Battioni vacuum pumps
in North America. This allowed NVE to evolve into its current status as a
wholesale supplier.
To reach the goal of becoming a full service supplier of vacuum system
components, NVE began fabrication its own line of componentry,
purchased and developed its own line of vacuum pumps, and began
purchasing for resale various valves and accessories.
Today, NVE has full service machine, fabrication and powder-coating
shops complete with CNC-controlled production equipment designed for
close tolerance work. Our staff is highly trained and are committed to
quality from start to nish.

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Warranty
National Vacuum Equipment, Inc.
guarantees that the product it provides is free of manu-
facturer’s defects, including materials and workmanship.
Properly installed and maintained product is warranted for a
period of one (1) year subject to the following conditions:
1. A properly completed warranty registration card must be
received by us within 30 days of sale to end user for pump sales
to be considered warrantable. All pumps received for warranty
consideration must retain the original NVE serial number tag.
2. The one (1) year period shall begin the day the product is
shipped from our warehouse, unless we are provided with an
authentic copy of the original resale invoice, in which case the
one (1) year period shall begin at such invoice date.
3. The covered product must be used in an application for
which it was intended. We do not recommend our product for
particular uses or applications.
4. Vane breakage, or damage caused by vane breakage, is
not warrantable.
5. Damage caused by improper use or lack of proper mainte-
nance is not warrantable.
6. Manufacturer’s liability under this or any other warranty,
whether express or implied, is limited to repair of or, at the
manufacturer’s option, replacement of parts which are shown to
have been defective when shipped.
LIMITED WARRANTY

MEC 5000, 6500 & 8000/P | 9www.natvac.com | 800.253.5500
7. Manufacturer’s liability shall not be enforceable for any
product until National Vacuum Equipment, Inc. has been paid in
full for such product.
8. Except to the extent expressly stated herein, manufac-
turer’s liability for incidental and consequential damage is
hereby excluded to the full extent permitted by law.
9. Manufacturer’s liability as stated herin cannot be altered
except in writing signed by an ofcer of National Vacuum Equip-
ment, Inc.
10. Certain products provided by National Vacuum Equipment,
Inc. are covered by their respective manufacturer’s warran-
ties (e.g., engines used in the NVE engine drive packages).
These products are not covered by the National Vacuum Equip-
ment, Inc. Manufacturer’s Warranty.
11. Final assemblers responsibility. NVE goes to great lengths
to insure the quality and proper functionality of the products it
supplies. Many products we supply are purchased for resale
or are impossible or impractical to test prior to the installation
of the item in a vacuum system. It is therefore the responsibil-
ity of the nal assembler to thoroughly test the vacuum system
and components supplied to the assembler by NVE prior to the
delivery of the nal product to the end user.
Any items found to be defective after delivery to the end user
that should have been discovered prior to deliver will qualify
replacement of the defective part only with absolutely no com-
pensation for outside labor or travel expenses. Any subsequent
damage to other components caused by the defective part will
be the sole responsibility of the assembler.

10 | MEC 5000, 6500 & 8000/P www.natvac.com | 800.253.5500
WARRANTY PROCEDURES
Should a potential warranty situation arise, the following
procedures must be followed:
• Contact your dealer immediately upon the occurrence of the
event and within the warranty period.
• Customer must receive a return goods authorization (RGA)
before returning product.
• All serial-numbered products must retain the NVE serial
numbertagtobequaliedforwarranty.
• Product must be returned to NVE intact for inspection before
warranty will be honored.
• Product must be returned to NVE freight prepaid in the most
economical way.
• Credit will be issued for material found to be defective upon
our inspection, based upon prices at the time of purchase.

MEC 5000, 6500 & 8000/P | 11www.natvac.com | 800.253.5500
_______________________________
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Notes

12 | MEC 5000, 6500 & 8000/P www.natvac.com | 800.253.5500
The MEC Series Pumps
Model-Specic Information
for the
MEC 5000/P
MEC 6500/P
MEC 8000/P
MEC Series Pump Specications
Model Number 5000 6500 8000
RPM Range 800–1400 800–1400 800–1400
Max. Air Flow-CFM 195 250 285
Max. Intermittent Vacuum 27 27 27
Max. Intermittent Pressure 30 30 30
Pump Drive Rotation CW/CCW CW/CCW CW/CCW
Porting Size 3 inch 3 inch 3 inch
Manifold With Four Way Valve Std Std Std
Oil Tank Capacity-Quarts 2 1/2 3 1/4 4
Bearings Sealed From Pump Interior Std Std Std
Anti-Spin Check Valve Std Std Std
Automatic Lubrication System Opt Opt Opt
Net Weight 308 343 400

MEC 5000, 6500 & 8000/P | 13www.natvac.com | 800.253.5500
RPM
1400
1200
1000
Recommended Setup
for optimum performance
PRessuRe PsI
MEC 5000/P PERFORMANCE
VacuuM – Inches of MeRcuRy
RPM
1400
1200
1000
hP
cfM
hP
cfM
h.P
cfM
25
24
158
20
132
17
106
20
21
166
17
138
14
112
15
17
172
15
144
12
117
10
14
180
13
150
9
124
5
12
187
8
158
6
130
0
7
195
5
165
3
138
3
7
192
6
162
4
135
6
7
190
6
160
4
130
9
8
185
7
156
5
126
12
9
180
7
152
6
121
15
10
175
8
148
7
116
18
11
165
9
140
7
110
21
12
155
10
130
8
98
24
13
140
11
115
9
84
27
14
115
12
85
9
50
30
28
154
24
128
19
98
PRessuRe PsI
MEC 6500/P PERFORMANCE
VacuuM – Inches of MeRcuRy
RPM
1400
1200
1000
hP
cfM
hP
cfM
h.P
cfM
25
30
224
26
188
22
156
20
27
228
22
192
18
160
15
22
232
18
197
15
163
10
18
237
14
204
12
167
5
13
242
12
212
8
170
0
10
250
8
220
6
180
3
10
248
8
218
6
177
6
11
246
9
216
7
172
9
11
244
9
214
7
170
12
12
240
10
210
8
167
15
12
236
11
202
8
162
18
13
230
11
196
9
158
21
13
220
12
185
10
150
24
14
205
12
175
10
140
27
15
180
13
145
11
110
30
34
220
28
184
24
152
PRessuRe PsI
MEC 8000/P PERFORMANCE
VacuuM – Inches of MeRcuRy
hP
cfM
hP
cfM
h.P
cfM
25
37
251
32
210
25
173
20
33
255
28
214
21
178
15
27
260
22
220
17
183
10
22
268
16
230
13
190
5
17
278
12
237
9
195
0
12
285
8
245
6
200
3
12
282
9
243
6
205
6
13
280
10
240
7
200
9
14
277
11
236
7
192
12
15
271
11
230
8
186
15
17
265
12
225
9
180
18
18
258
13
218
10
170
21
19
242
14
200
11
158
30
42
248
35
206
29
168
24
20
220
15
180
12
146
27
21
180
16
150
13
100

14 | MEC 5000, 6500 & 8000/P www.natvac.com | 800.253.5500
System requirements
High quality components
• Thepump body and rotor are constructed
of cast iron with free sliding vanes made of
special nonmetallic, heat resistant material.
• Becausevanesarenonmetallic,ammable
uidsmaybehandledwithoutdanger.
• Vaneswearevenlybecausetipsalwaysremain
in contact with the wall surface.
• Formaximumlifeandproperperformance
we recommend the use of our compatible
components, Portal F-801 and Moisture Trap
F-901.

MEC 5000, 6500 & 8000/P | 15www.natvac.com | 800.253.5500
Operating Instructions
MEC 5000/P
MEC 6500/P
MEC 8000/P
Installation
• Checkpumprotation. See Determining the Rotation of
Pump.
• Pumpshouldalwaysbemountedinalevel,horizontal
positiononarm,atsurface.
• Grade5boltsshouldbeusedininstallation.Itisimportant
touseatwashers and lock washers.
• Werecommendtheuseofoilresistanthose on both the
inlet and outlet sides of the pump. If using direct drive
system,alwaysuseaexiblecoupling. We recommend the
use of Woods Sure Flex Couplers.
• Ifamuferisusedondischargesideofpump,inletand
outlet of mufermustbeatleastequaltoinsidediameter
of pump outlet.

16 | MEC 5000, 6500 & 8000/P www.natvac.com | 800.253.5500
Lubrication procedure for all vacuum pumps on start up
(This procedure must be followed prior to the operation of a new
vacuum pump.):
• Withforcefeedlubricationtype,installdripper on top of pump
and connect rubber lines.*
• Removedipstickandlloilreservoirwith 
recommended turbine oil.
• With540RPMpumps:llgearhousingtolevelofclearplastic
sight plug on the side of the housing with SAE 90 gear oil.
• Removeplasticcaponairinletandpour2oz.turbineoilinto
pump. Start pump slowly and with valve in suction position,
pour 2 oz. turbine oil into air inlet.
• Atthispointoilshouldbevisibleinthedripperoroillines.
Adjustdripperowto1dropevery2seconds.
*Dripper will be shipped loose or taped to the bottom of the
changeover valve handle.
Automatic oil pump
• Theautomaticoil pumps are set at the factory
during pump testing and should require no further adjustment
during pump installation.
• Thepumpsareadjustedtoonedropeverytwosecondsper
outlet. This oilrateequals2.7uidoz.perhour.

MEC 5000, 6500 & 8000/P | 17www.natvac.com | 800.253.5500
Adjusting the automatic oil pump
The automatic oil pump is a metered piston-type pump.
If you wish to adjust the pump, please follow these instructions:
Adjusting the oil rate
Oilowischangedbyadjustingthelengthofthestrokeofthepiston.
1. To adjust the oil rate, remove cap #P16. Under this cap you will
ndajamnut#P15andadjustingscrew#P11.
2. To adjust oil rate loosen jam nut and turn adjusting screw
clockwisetoreduceoiloworcounterclockwisetoincreaseoil
ow.
3. When making adjustments do so one turn of the screw at a
time and test before making further adjustments.
4. Be careful to not turn adjusting screw too far counterclockwise
as you may disengage the gears and strip them out.

18 | MEC 5000, 6500 & 8000/P www.natvac.com | 800.253.5500
Testing ow rate after adjustment
1. Observe oil drip rate in oil view meter or oil line to ensure
adequate lubrication.
2. Adjustments should be done gradually so as not to starve
the vacuum pump of oil.
Recommended lubrication
We recommend that turbine grade oil be used in all our pumps. Tur-
bineoilismorehighlyrenedthanmotoroilandismuchlesslikely
to create carbon. Turbine oil is available from your local oil distribu-
tor. Below is a list of acceptable oils.
• PenzoilPenzabell68T.O.
• ShellTurbo68
• MobilD.T.E.Heavy–Medium
• TexacoRegalR.N.O.68
Normal operation for air cooled pumps:
1. Check oilreservoirdailyandllasrequired.
2. When pump is in operation check oilertoinsureowofoil
to pump.
3. Do not operate pump faster than recommended RPM.
4. To operate suction valve on top of pump, move handle in
the appropriate direction for either vacuum or pressure;
center it for neutral.
5. We recommend checking vane wear every twelve months.
Anewvaneisnearlyushwiththerotor.Measurethe
wear and if is over 1/4” we recommend replacing vanes.
It’s good to always keep a spare set of vanes on hand for
emergencies.

MEC 5000, 6500 & 8000/P | 19www.natvac.com | 800.253.5500
Maintenance
• With force feed type, the lubrication rate is adjustable
at dripper and should be checked on a regular basis. Oil
should be supplied to pump at a rate of 1 drop every 2
seconds.
• Averageusageofoilisapproximately1-2qts.per40hours,
depending on operation.
• Oilshouldbechangedevery2000hoursingearper
housing, if equipped.
• Frontbearing should be greased approximately every 4
months. Use caution when greasing bearing not to over
grease, as this can cause damage to seals.
• Normalvane life is approximately 2000 hours; however, this
will vary greatly with temperature, material being pumped
and proper maintenance.
• Occasionallyliquidanddirtmayenterthepumpcausing
vanes to stick in the rotor slots along with excessive vane
and housing wear. When this occurs you must clean the
inside of the pump.
Cleaning the inside of the pump
• Removeairinlethoseorpressure relief valve.
• Runpumpatanidlewiththechangeover valve in neutral.
• Pour1pintofdiesel fuel into pump through the air inlet
ortting.Allowpumptorunfor30secondsthenturnthe
change over valve to vacuum.
• Repeattwostepsaboveseveraltimes,andthenpour2oz.
of oil into the pump and reassemble.
• Stoppumpandturnslowlybyhandwhilelisteningforvanes
dropping.Allvanesshouldmovefreelyintherotorslot.

20 | MEC 5000, 6500 & 8000/P www.natvac.com | 800.253.5500
• It is good practice to clean your pump on a regular basis as
this will normally increase the life of your pump greatly.
• Vane wear should be checked every 12 months. A new
vanewillbeushwiththeoutsidediameteroftherotor.
• When vane wear exceeds 1/4” the vanes should be
replaced. It is a good idea to have an extra set of vanes,
seals and gaskets on hand at all times.
Determining the rotation of the pump
As one faces the drive end of the pump:
• For 1000 RPM pumps with the oiler on the right side, the
pump shaft turns clockwise.
• For gear driven pumps (540 RPM) with the oiler on the right
side, the pump shaft turns counterclockwise.
• If you must change the rotation of your pump contact the
factory for instructions before attempting it.