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4

WARNING

Never block the Exhaust Port.

If the exhaust port is blocked, pressure will build-up in the pump

with the potential of the pump body bursting and causing

possible injury to personnel in the area.

Section 1:  INSTALLATION

1.10  Introduction

 

This manual has been complied not only for the care and maintenance of the DUOSEAL pump now in your 

 

possession but as a helpful reference and guide for many problems which are usually associated with mechanical 

 

vacuum pumps.  Take time to read these instructions carefully and preserve this manual for future reference; we 

 

think it will be useful to you.

1.11 

Unpacking

 

Carefully remove the pump from the shipping case and unfasten and remove the wooden skid.  Preserve all paper

 

work and inspection tags for future reference.  If damage has occurred from shipment a claim must be filed with 

 

the carrier immediately; preserve the shipping container for inspection by the carrier.  If you are required to 

 

communicate with your dealer or with Welch Vacuum be sure to include your order numbers for quick 

 

identification.  Do not return the pump to the factory without firstcompleting the on-line request form for returned    

 

goods authorization at www.welchvacuum.com.

1.12  Pump Mounting

1.121  Mounted Pumps

 

Rubber bumpers are supplied with most of our mounted pumps, either loosely or attached.  Bumpers are excellent

  

for applications involving a semi-flexible surface such as a bench top; they help to isolate noise and eliminate 

 

creeping.  For more rigid requirements, the pump base may be bolted directly to a firm foundation with or without 

 

the bumpers.  All DUOSEAL pumps should be mounted in a horizontal plane.

1.122  Unmounted Pumps

 

If you have purchased an unmounted pump, refer to parts list for information concerning the motor, motor pulley 

 

and belt necessary to drive your particular pump at the recommended speed.

1.13  Pump Location

 

The pump should be located preferably in a clean and well ventilated area and adequate space should be provided 

 

wherever possible for routine maintenance such as changes of oil and belt adjustments and replacements.  Above 

 

all, the pump should be located as closely as possible to its system in order to utilize it most efficiently.  Its 

 

location should include such determining factors as the length and size of connections, the number of bends and 

 

the type of exhaust connections.

1.14  Exhaust Provisions (See Accessory section in back of this manual.)

 

Exhaust connections will be determined by the type of system to be exhausted and the desired cleanliness of the 

 

atmosphere surrounding the pump.  Under normal conditions of mild evacuation nothing more than the dust cap 

 

will be necessary to cover the port.  Where relatively high gas flows are involved or where the presence of oil 

 

vapor is objectionable an exhaust filter may be fastened to the exhaust port in place of the dust cap.  The exhaust 

 

filters used on our pumps are capable of absorbing and restricting any vapor particle larger than 0.1 micron.

 

Where extreme exhaust conditions are encountered it is best to pipe the exhaust direct out of the building.  

 

Welch recommended wire reinforced PVC, metal pipe or thick walled rubber hose be used as exhaust lines to 

 

avoid potential of line becoming crimped or collapsing resulting in the exhaust port being clocked.  

 

Be sure to call Welch technical service prior to start-up at 847-676-8800 if you have any questions.

Summary of Contents for Welch Duoseal 1402C-46

Page 1: ...pump body bursting and causing possible injury to personnel in the area Gardner Denver Inc Welch Vacuum Technology 5621 W Howard Street Niles IL 60714 Phone 847 676 8800 Fax 847 677 8606 Technical Su...

Page 2: ...ons are found where failure to observe the instruction could result in damage to the equipment associated equipment and process These units confirm to the SI International system of units of measureme...

Page 3: ...vel 10 3 30 Shaft Seal Replacement 10 3 40 Repairing Oil Leaks 11 3 50 Repairing Vacuum Leaks 11 3 60 Drive Problems 11 Section 04 Trouble Shooting Guide 4 10 Poor Vacuum Readings 12 4 20 Noisy Pump 1...

Page 4: ...SEAL pumps should be mounted in a horizontal plane 1 122 Unmounted Pumps If you have purchased an unmounted pump refer to parts list for information concerning the motor motor pulley and belt necessar...

Page 5: ...e gas flow is substantially molecular in character The gas flow is then dependent upon the kinetic activity of the molecules to bring it to the intake of the pump 1 162 The Effects of Conductance It h...

Page 6: ...e yourself with the function and action of the pump which you have now required Remove the intake and exhaust port plugs and temporarily provide a stopper for the intake and a dust cap for the exhaust...

Page 7: ...f the volume of the mixture this depending upon the amount of air added condensation of the vapor is wither entirely avoided or substantial reduced 2 223 Pump Function With Gas Ballast In a pump funct...

Page 8: ...rich in hydrogen and observing a sudden change in pressure on an electrical gauge The difference in calibration of these gauges for air and other gases will produce a distinct change in the pressure...

Page 9: ...a system must be thoroughly clean If the system is completely clean and free from leaks and unwarranted vacuum problems still exist the pump should be checked A simple criterion for the condition of a...

Page 10: ...rubber stopper Turn the pump on and run the pump for 10 minutes Close the gas ballast 8 Check the vacuum reading of the pump by connecting a thermocouple gauge tube to the pump s intake If the pump is...

Page 11: ...ng surfaces cleaned of any nicks 3 50 Repairing Vacuum Leaks 3 501 Surface Preparation Good Vacuum seals are an essential and important attribute of a good mechanical pump A good seal is dependent upo...

Page 12: ...t a forced oil flush 5 If noise level is still unsatisfactory consult with WELCH Technical Service at 847 676 8800 Ext 1 4 30 Excessive Oil Mist 1 Check oil level Maintain the level between the two li...

Page 13: ...l Requirements 3 1 Phase Replacement Parts Shaft Seal Lip Seal 1401D 01 Shaft Seal Mechanical Seal 1401D Air Filter Screen 41 0660 Intake Chamber Cover Gasket 41 0234 Oil Case Gasket 41 0403 Drain Plu...

Page 14: ...14 Section 6 DIMENSIONAL DRAWING...

Page 15: ...ange High RPM direct drive vacuum pumps on the other hand experience a rapid fall off of pumping speed below 100 microns A comparison of the DuoSeal pumping speed curves shown below versus high RPM pu...

Page 16: ...tion 8 EXPLODED VIEW 1 46 34 5 24 31 52 53 15 27 46 5 24 51 25 49 30 6 28 12 8 39 29 40 44 35 54 41 42 11 43 45 10 12 50 9 26 28 36 25 33 23 7 55 22 57 56 4 2 16 47 3 32 59 14 13 20 18 17 38 48 58 19...

Page 17: ...5 1 41 2175 SETSCREW 1 4 20 x 2 25 LG 16 1 41 0234 1 1 GASKET INTAKE CHAMBER COVER 46 6 41 2363 WASHER 5 16 ID x 1 2 OD 17 1 41 0403 1 1 GASKET OIL CASE 47 1 41 2757 LOCK NUT 18 1 41 0508 1 1 WASHER T...

Page 18: ...101 Parts List for Model 61 8101 Item Qty P N Description 1 2 61 2229A Oil Window Glass 2 1 61 2278 Drain Valve 3 2 61 2370 Oil Window Cover 4 1 61 8833 Oil Case Machined 5 4 62 1014 Screw 8 32x3 8 Fl...

Page 19: ...onnection kit Cat No 141601 for models1400 1405 1376 1380 1402 Standard Exhaust Filter Use with pump model Dimension Catalog Number Diameter Height Filter Replacement Element 1392 1399 1400 1376 1380...

Page 20: ...Height A2 Cat No 1 NW16 to 4 CFM 140 L min 3 75 5 25 8 25 541001 Stainless Steel Element for ISO NW 16 Trap 1 541921 Stainless Steel Element for ISO NW 25 and NW 40 Traps1 541922 Removable 3 quarter...

Page 21: ...significant adverse health effects are expected to occur upon short term exposure to this product Aspiration of liquid into the lungs can cause severe lung damage or death Eye Contact Minimal eye irri...

Page 22: ...ir Eye Contact Check for and remove contact lenses Flush eyes with cool clean low pressure water while occasionally lifting and lowering eyelids Seek medical attention if excessive tearing redness or...

Page 23: ...ct recovery or disposal Prevent entry into waterways or sewers In urban area cleanup spill as soon as possible In natural environments seek cleanup advice from specialists to minimize physical habitat...

Page 24: ...c vapor respirator equipped with a dust mist prefilter should be used Protection factors vary depending upon the type of respirator used Respirators should be usedin accordance with OSHA requirements...

Page 25: ...product However if spilled this product and any contaminated soil or water may be harmful to human animal and aquatic life Also the coating action associated with petroleum and petroleum products can...

Page 26: ...rd categories No SARA 311 312 Hazard categories identified SARA 313 This product contains the following components in concentrations above the minimis levels that are listed as toxic chemicals in 40 C...

Page 27: ...for Research on Cancer NTP National Toxicology ProgramNIOSH National Institute of Occupational Safety and Health OSHA Occupational Safety and Health Administration NPCA National Paint and Coating Man...

Page 28: ...um Technology and receipt or possession does not convey any rights to loan sell or otherwise disclose said information reproduction or use of said information for any purpose other than that in connec...

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