Mechanical Seal

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Chesterton Mechanical Seal Standard Cartridge 155 15
Chesterton Mechanical Seal Standard Cartridge 155 15
$195.00
quality
2 MECOSEL 5330402324 Seal Mechanical 15 16 Rotary Unit T1252
2 MECOSEL 5330402324 Seal Mechanical 15 16 Rotary Unit T1252
$50.00
quality
Mechanical seal seat 4012 inch ID 811715612 Luwa Corp Unused
Mechanical seal seat 4012 inch ID 811715612 Luwa Corp Unused
$1,500.00
quality
New Goulds 10K13 Mechanical Seal
New Goulds 10K13 Mechanical Seal
$65.00
quality
MECHANICAL SEAL FOR CHEMINEER MIXER
MECHANICAL SEAL FOR CHEMINEER MIXER
$599.00
quality
135433 New No Box Ingersoll Rand P02887 Mechanical Seal Rotor
135433 New No Box Ingersoll Rand P02887 Mechanical Seal Rotor
$67.93
quality
new jabsco pump 8728 0000 mechanical seal part
new jabsco pump 8728 0000 mechanical seal part
$69.99
quality
FlowServe split mechanical seal 40 inch PSS III 157712PS3 PSSIII 4000 PS3
FlowServe split mechanical seal 40 inch PSS III 157712PS3 PSSIII 4000 PS3
$240.00
quality
Sealol mechanical cartridge seal 40 inch 676GGT SCC 31768 CF26626 C5548748
Sealol mechanical cartridge seal 40 inch 676GGT SCC 31768 CF26626 C5548748
$195.00
quality
MECHANICAL SEAL ASSEMBLY 26459 30
MECHANICAL SEAL ASSEMBLY 26459 30
$375.00
quality
Durametallic 2 Mechanical Seal 116569 Double In Outside Cartridge LE3M2250AB3
Durametallic 2 Mechanical Seal 116569 Double In Outside Cartridge LE3M2250AB3
$126.75
quality
Durametallic Mechanical Seal 129375 Double Ins RO Dura Seal QE3E1875AJ3
Durametallic Mechanical Seal 129375 Double Ins RO Dura Seal QE3E1875AJ3
$126.75
quality
Durametallic 2 1 2 Mechanical Seal 120944 Dura Seal Double MRA AEPB2750WL3
Durametallic 2 1 2 Mechanical Seal 120944 Dura Seal Double MRA AEPB2750WL3
$162.50
quality
Durametallic 2 Mechanical Seal Double Inside Outside Cartridge MRA AEPB2250WF3J
Durametallic 2 Mechanical Seal Double Inside Outside Cartridge MRA AEPB2250WF3J
$126.75
quality
Durametallic Mechanical Seal Dbl Ins Outs CA RT MRA Dura Seal AEPB3250WG3J
Durametallic Mechanical Seal Dbl Ins Outs CA RT MRA Dura Seal AEPB3250WG3J
$126.75
quality
Durametallic 2 Mechanical Seal 82950 Double Inside Bro 116569
Durametallic 2 Mechanical Seal 82950 Double Inside Bro 116569
$126.75
quality
Durametallic 2 Mechanical Seal DBL Cartridge BRO 2000
Durametallic 2 Mechanical Seal DBL Cartridge BRO 2000
$222.50
quality
FlowServe split mechanical seal ring 750 inch K43S7500PC3 PCIII
FlowServe split mechanical seal ring 750 inch K43S7500PC3 PCIII
$88.00
quality
Ingersoll Dresser Mechanical Seal CPM10465A JC
Ingersoll Dresser Mechanical Seal CPM10465A JC
$75.00
quality
SEPCO SRS Mechanical Seal 50mm 05022001 Sepco Carbon Graphite
SEPCO SRS Mechanical Seal 50mm 05022001 Sepco Carbon Graphite
$75.00
quality
Durametallic Mechanical Seal GEA2463581A
Durametallic Mechanical Seal GEA2463581A
$75.00
quality
Flowtech 56mm Mechanical Seal Single Sic VS TC 5161 Siliconized Graphite
Flowtech 56mm Mechanical Seal Single Sic VS TC 5161 Siliconized Graphite
$50.00
quality
Durametallic Mechanical Seal DMC Y5FL1375ACG
Durametallic Mechanical Seal DMC Y5FL1375ACG
$25.00
quality
Durametallic Mechanical Seal Viton O Ring MVSR1750333 pack of 4
Durametallic Mechanical Seal Viton O Ring MVSR1750333 pack of 4
$20.00
quality
JOHN CRANE B63172 Mechanical Seal Assembly 2375 Type 21 Polished face
JOHN CRANE B63172 Mechanical Seal Assembly 2375 Type 21 Polished face
$150.00
quality
Flexibox Mechanical Seal Unbalanced Seal Type R10R P N R10R 0825 31AY 0000
Flexibox Mechanical Seal Unbalanced Seal Type R10R P N R10R 0825 31AY 0000
$125.00
quality
Flexibox Mechanical Seal Unbalanced Seal Type R10L Part  R10L 1016 31AS H104
Flexibox Mechanical Seal Unbalanced Seal Type R10L Part R10L 1016 31AS H104
$125.00
quality
EGG SEALOL MECHANICAL SEAL RSD 1905  RSD1905
EGG SEALOL MECHANICAL SEAL RSD 1905 RSD1905
$55.00
quality
EGG SEALOL MECHANICAL SEAL 1855
EGG SEALOL MECHANICAL SEAL 1855
$75.00
quality
EGG SEALOL MECHANICAL SEAL 3830
EGG SEALOL MECHANICAL SEAL 3830
$75.00
quality
JOHN CRANE MECHANICAL SEAL RSD 1320  RSD1320
JOHN CRANE MECHANICAL SEAL RSD 1320 RSD1320
$35.00
quality
JOHN CRANE MECHANICAL SEAL RSD 3060  RSD3060
JOHN CRANE MECHANICAL SEAL RSD 3060 RSD3060
$75.00
quality
JOHN CRANE MECHANICAL SEAL RSD 4250  RSD4250
JOHN CRANE MECHANICAL SEAL RSD 4250 RSD4250
$55.00
quality
LOT 4 NEW GARLOCK 21155 0291 63X0291 MECHANICAL OIL SEAL 1IN ID 1 5 8IN B269172
LOT 4 NEW GARLOCK 21155 0291 63X0291 MECHANICAL OIL SEAL 1IN ID 1 5 8IN B269172
$12.00
quality
LOT 4 NEW GARLOCK 26001 7032 71X7032 MECHANICAL OIL SEAL 3 4X1 1 4X1 8IN B269230
LOT 4 NEW GARLOCK 26001 7032 71X7032 MECHANICAL OIL SEAL 3 4X1 1 4X1 8IN B269230
$15.00
quality
NEW AMPCO GS8104320 1IN MECHANICAL SEAL PUMP REPLACEMENT PART D269545
NEW AMPCO GS8104320 1IN MECHANICAL SEAL PUMP REPLACEMENT PART D269545
$77.00
quality
John Crane Mechanical Seal Kit Model M02844 NIB
John Crane Mechanical Seal Kit Model M02844 NIB
$100.00
quality
ROPER PUMP CO GENUINE PARTS MECHANICAL PUMP SEAL G14 226
ROPER PUMP CO GENUINE PARTS MECHANICAL PUMP SEAL G14 226
$20.00
quality
REFURBISHED AESSEAL TYPE CSSN 1875 MECHANICAL SEAL 3AVSS15L01 RG131
REFURBISHED AESSEAL TYPE CSSN 1875 MECHANICAL SEAL 3AVSS15L01 RG131
$199.88
quality
Mechanical Seal 2 478 011 999 00
Mechanical Seal 2 478 011 999 00
$265.00
quality
Mechanical Seal Buna N
Mechanical Seal Buna N
$17.06
quality
ANCHOR ROTA FACE MECHANICAL SEAL 2 1 8 SHAFT TYPE 3A NIB
ANCHOR ROTA FACE MECHANICAL SEAL 2 1 8 SHAFT TYPE 3A NIB
$44.99
quality
NEW FLEX A SEAL FAS 9327 MECHANICAL PUMP SEAL REPLACEMENT PART D414490
NEW FLEX A SEAL FAS 9327 MECHANICAL PUMP SEAL REPLACEMENT PART D414490
$75.00
quality
LOT OF 2 GORMAN RUPP PUMPS MECHANICAL SHAFT SEAL KITS ID 7 8  5 8
LOT OF 2 GORMAN RUPP PUMPS MECHANICAL SHAFT SEAL KITS ID 7 8 5 8
$30.00
quality
EAGLE BURGMANN CARTEX IKA DN 20 E1 MECHANICAL SEAL ASSEMBLY Q1Q1V16MG BQ1V16MG
EAGLE BURGMANN CARTEX IKA DN 20 E1 MECHANICAL SEAL ASSEMBLY Q1Q1V16MG BQ1V16MG
$779.99
quality
NEW JOHN CRANE BF50878 MECHANICAL JOINT PUMP SHAFT SEAL 1 1 4IN 200138
NEW JOHN CRANE BF50878 MECHANICAL JOINT PUMP SHAFT SEAL 1 1 4IN 200138
$30.00
quality
NEW JOHN CRANE BF50878 MECHANICAL JOINT PUMP SHAFT SEAL 1 1 4IN 200139
NEW JOHN CRANE BF50878 MECHANICAL JOINT PUMP SHAFT SEAL 1 1 4IN 200139
$30.00
quality
FLOWSERVE LE 3C 2375ST3 MECHANICAL SEAL 2 BORE
FLOWSERVE LE 3C 2375ST3 MECHANICAL SEAL 2 BORE
$199.99
quality
NEW CHESTERTON 442 695816 MECHANICAL 43M SEAL STAINLESS REPLACEMENT PART 200263
NEW CHESTERTON 442 695816 MECHANICAL 43M SEAL STAINLESS REPLACEMENT PART 200263
$175.00
quality
NEW JOHN CRANE 611QBC SBR337 42 MECHANICAL SEAL STAINLESS PART FOR PUMP 200321
NEW JOHN CRANE 611QBC SBR337 42 MECHANICAL SEAL STAINLESS PART FOR PUMP 200321
$600.00
quality
Crane Deming 0084881 Mechanical seal PS 756V 74898800 New
Crane Deming 0084881 Mechanical seal PS 756V 74898800 New
$49.99
quality
ACE O PAX CHEMPLAST MECHANICAL PACKINGS SEALS 1 5 8 X 2 3 8 3 8 5 RINGS
ACE O PAX CHEMPLAST MECHANICAL PACKINGS SEALS 1 5 8 X 2 3 8 3 8 5 RINGS
$40.00
quality
EAGLE BURGMANN CARTEX DN 20 E1 MECHANICAL SEAL ASSEMBLY Q1Q1V16MG BQ1V16MG
EAGLE BURGMANN CARTEX DN 20 E1 MECHANICAL SEAL ASSEMBLY Q1Q1V16MG BQ1V16MG
$249.99
quality
ACE O PAX CHEMPLAST MECHANICAL PACKINGS SEALS 1 1 8 X 1 3 4 5 16 5 RINGS
ACE O PAX CHEMPLAST MECHANICAL PACKINGS SEALS 1 1 8 X 1 3 4 5 16 5 RINGS
$30.00
quality
LOT 2 NEW KRONES 1 090 08 066 0 MECHANICAL SEAL 3 7 8X2 3 8X5 8IN D271267
LOT 2 NEW KRONES 1 090 08 066 0 MECHANICAL SEAL 3 7 8X2 3 8X5 8IN D271267
$23.00
quality
LOT 3 NEW KRONES 1 073 52 260 0 MECHANICAL SEAL 15X8X5MM D271351
LOT 3 NEW KRONES 1 073 52 260 0 MECHANICAL SEAL 15X8X5MM D271351
$16.00
quality
Chesterton Split Mechanical Pump Seals
Chesterton Split Mechanical Pump Seals
$400.00
quality
FLOWSERVE INGERSOLL 60721800 Mechanical Seal SMP2000
FLOWSERVE INGERSOLL 60721800 Mechanical Seal SMP2000
$29.99
quality
CHESTERTON 714 P N 044820 Ceramic Mechanical Seal 65 mm
CHESTERTON 714 P N 044820 Ceramic Mechanical Seal 65 mm
$29.99
quality
NEW FLOWSERVE JS 778866 MECHANICAL SEAL CERAMIC 7 3 8IN ID 8 7 8IN OD B201265
NEW FLOWSERVE JS 778866 MECHANICAL SEAL CERAMIC 7 3 8IN ID 8 7 8IN OD B201265
$130.00
quality
CHESTERTON 714 P N 044820 Ceramic Mechanical Seal 65 mm
CHESTERTON 714 P N 044820 Ceramic Mechanical Seal 65 mm
$22.99
quality
NEW FLOWSERVE PAC269VCX PUMP ALUMINUM MECHANICAL SEAL REPLACEMENT PART B201579
NEW FLOWSERVE PAC269VCX PUMP ALUMINUM MECHANICAL SEAL REPLACEMENT PART B201579
$30.00
quality
NEW JOHN CRANE BP868 MECHANICAL JOINT ASSEMBLY REPAIR KIT SEAL B201923
NEW JOHN CRANE BP868 MECHANICAL JOINT ASSEMBLY REPAIR KIT SEAL B201923
$75.00
quality
NEW JOHN CRANE FSP 1959 MECHANICAL SEAL ASSEMBLY KIT 2 1 8IN TYPE 2 D377094
NEW JOHN CRANE FSP 1959 MECHANICAL SEAL ASSEMBLY KIT 2 1 8IN TYPE 2 D377094
$375.00
quality
NEW JOHN CRANE FSP 1959 MECHANICAL SEAL ASSEMBLY KIT 2 1 8IN TYPE 2 D377113
NEW JOHN CRANE FSP 1959 MECHANICAL SEAL ASSEMBLY KIT 2 1 8IN TYPE 2 D377113
$370.00
quality
NEW INGERSOLL RAND 60514130 CPM10466B MECHANICAL SEAL G65 1 1 2 IN D444771
NEW INGERSOLL RAND 60514130 CPM10466B MECHANICAL SEAL G65 1 1 2 IN D444771
$86.00
quality
FLOWTECH 5120 30MM SINGLE MECHANICAL SEAL CARBON VS SS
FLOWTECH 5120 30MM SINGLE MECHANICAL SEAL CARBON VS SS
$45.00
quality
EAGLE BURGMANN CARTEX DN 20 E1 MECHANICAL SEAL ASSEMBLY 14404 BQ1V16MG BUKA22
EAGLE BURGMANN CARTEX DN 20 E1 MECHANICAL SEAL ASSEMBLY 14404 BQ1V16MG BUKA22
$759.99
quality
JOHN CRANE MC680 0621 TYPE 680 MECHANICAL BELLOWS 1 3 4 IN PUMP SEAL B459525
JOHN CRANE MC680 0621 TYPE 680 MECHANICAL BELLOWS 1 3 4 IN PUMP SEAL B459525
$250.00
quality
JOHN CRANE MECHANICAL SEAL HOUSING TYPE 2800 PART  M381 53
JOHN CRANE MECHANICAL SEAL HOUSING TYPE 2800 PART M381 53
$299.99
quality
1 NEW EGG 604BAC P 32 900122 32 SEALOL MECHANICAL SHAFT SEAL ASSEMBLY NIB
1 NEW EGG 604BAC P 32 900122 32 SEALOL MECHANICAL SHAFT SEAL ASSEMBLY NIB
$79.99
quality
John Crane Mechanical Seal 30 repair kit 1382829 DB1371 300 7854 BR6426662 001
John Crane Mechanical Seal 30 repair kit 1382829 DB1371 300 7854 BR6426662 001
$79.00
quality
John Crane Mechanical Seal 175 type 21 Part  B04895
John Crane Mechanical Seal 175 type 21 Part B04895
$179.00
quality
John Crane Mechanical Seal 275 type 2 Part  B84387 full seal assembly
John Crane Mechanical Seal 275 type 2 Part B84387 full seal assembly
$199.00
quality
Dayton Mechanical Shaft Seal PN 1R315 Type 16 5 8 inch dia shaft size 406 seal
Dayton Mechanical Shaft Seal PN 1R315 Type 16 5 8 inch dia shaft size 406 seal
$9.50
quality
John Crane Mechanical Seal 250 Type 1 0667014 B36459 CF SP 70707 1
John Crane Mechanical Seal 250 Type 1 0667014 B36459 CF SP 70707 1
$109.00
quality
Flow Serve Mechanical Seal 20 Type RO Y5FJ20000L33 1093902 repair kit
Flow Serve Mechanical Seal 20 Type RO Y5FJ20000L33 1093902 repair kit
$75.00
quality
NEW JOHN CRANE 2625 MECHANICAL DOUBLE ROW SEAL COLLAR D26259630500
NEW JOHN CRANE 2625 MECHANICAL DOUBLE ROW SEAL COLLAR D26259630500
$29.99
quality
Flow Serve Mechanical Seal 175 Type GSS 14 1394089 repair kit RSCPX175
Flow Serve Mechanical Seal 175 Type GSS 14 1394089 repair kit RSCPX175
$62.00
quality
NEW JOHN CRANE B17187 MECHANICAL SEAL TYPE 21 SZ 1250 D380263
NEW JOHN CRANE B17187 MECHANICAL SEAL TYPE 21 SZ 1250 D380263
$65.00
quality
NEW PPC MECHANICAL SEAL 1 1 2 P 3F 316 VITON 10 CAR SC HC 18 8 1500 P3F SP 1 P
NEW PPC MECHANICAL SEAL 1 1 2 P 3F 316 VITON 10 CAR SC HC 18 8 1500 P3F SP 1 P
$118.00
quality
MSR MECHANICAL SEAL REPAIR SEAL 40MM MSR 40 ROTATING BELLOW
MSR MECHANICAL SEAL REPAIR SEAL 40MM MSR 40 ROTATING BELLOW
$24.95
quality
MSR MECHANICAL SEAL REPAIR SEAL 40MM MSR 40 WITH STATIONARY SEAT
MSR MECHANICAL SEAL REPAIR SEAL 40MM MSR 40 WITH STATIONARY SEAT
$34.95
quality
MECHANICAL SEAL REPAIR 154719 SHAFT SIZE 3000
MECHANICAL SEAL REPAIR 154719 SHAFT SIZE 3000
$175.00
quality
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Mechanical Seal

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Mechanical Seals

Mechanical+Seal

Using Ultrananocrystalline Diamond To Improve Mechanical Seal Performance

A mechanical seal is a critical component whose useful life significantly impacts the overall reliability and robustness of pump or centrifugal compressor. Unscheduled or premature failure of the seal leads to increased maintenance and increased overall equipment costs to the user. The overall performance of a mechanical seal often is most affected by the performance of the faces and the intervening lubricating film. This primary element of a mechanical seal represents a classic problem in the science of tribology, the study of friction, wear and lubrication.

The demands placed on seal faces require careful attention to the issues of wear resistance, chemical compatibility, mechanical and thermal properties—all of which are determined by the end use application and overall seal design. When a mechanical seal is used in a pump, the liquid in the pump is used to cool and lubricate the seal faces. The seal faces are in sliding contact and prevent the liquid in the pump from reaching atmosphere. This contact also generates frictional heat that must be removed from the seal faces. Failure to remove this unwanted heat often results in the boiling of the lubricating liquid film at the seal faces, usually leaving a deleterious residue and causing premature failure of elastomeric components in the seals (static-secondary seals). Both of these undesirable effects of elevated temperatures lead to premature seal failure.

The ability to maintain coolant on the seal face is even more critical when compounded by the demands associated with the pumping of abrasive media or a pump’s ability to withstand intermittent and unscheduled coolant loss. The ability to run two hard-faced seal materials such as SiC against each other often is desirable but not practical due to the premature failures that result from elevated temperatures caused by friction at the seal interface.

In the case of a centrifugal gas compressor, a noncontacting mechanical seal is used to contain the gas within the machine. A lift mechanism, such as spiral grooves, is included in the design of the seal. During operation the seal faces do not make contact except at startup and shutdown. The intense frictional heat occurring at this time must be controlled or face damage can occur.

Based on the benefits nature’s hardest substance would appear to offer for this application, the idea of using the diamond as a wear resistant face material in seals is not new. Diamond also possesses many other attractive properties, including extremely high thermal conductivity and chemical resistance. Unfortunately, previous attempts at integrating diamond into seal faces failed due to difficulties in ensuring that the diamond face presented the necessary surface finish required for such a demanding tribological application. Following extensive research and development and improvements in equipment and processes, those problems appear to have been solved.

Today, a new form of diamond with ultrananocrystalline grains has entered the industrial arena. Invented at Argonne National Laboratory and commercialized for seals by John Crane, Inc. and Advanced Diamond Technologies, Inc., UNCD?, as it is commercially known, provides the surface roughness typical of normal, unprocessed seal. UNCD has been dynamically tested and shown to signifi- cantly reduce the frictional heat and increase the life of the seal faces in accelerated wear. The work highlighted in this article was completed, in part, by funding from the National Science Foundation and the Department of Energy.

Manufacturing hurdles

One of the major obstacles in providing a diamond-treated surface for a mechanical seal is maintaining the surface flatness and roughness necessary to achieve sealing. Early work in diamond surfacing placed extreme demands on finishing and polishing the diamond to meet the required metrology and geometric specifications of a seal face. Surfaces were rough and had a high degree of waviness. Additional lapping of the diamond surface to achieve sealing could not be done cost-effectively due to the hardness of diamond. Consequently, many researchers abandoned the idea of using diamond as a surface for seals.

The development of ultrananocrystalline diamond (UNCD), though, generated renewed interest in diamondtreated seal faces. The process demonstrated that the base material could be treated with diamond without changing its original flatness. This was a major breakthrough in the manufacturing technology for diamond-structured surfaces. At last, diamond could be applied to a seal face without any further work to achieve the desired flatness for sealing fluids. Moreover, UNCD, unlike other diamond films, has nanometer-scale roughness that allows as-deposited UNCD to have sufficient smoothness so that it doesn’t degrade a soft counterface. In other words, UNCD works in both hard on hard and hard on soft sealing applications.

Still, there was an additional obstacle to overcome. Work to this point was done to transfer this laboratory-scale process to meet the demand of seal production. New equipment and processes had to be designed to handle a larger volume of seals at one time. Once this was done, the new equipment and processes had to be validated. Tests were run on production parts and compared to those run on the smaller scale equipment. Continuous testing confirmed that the production parts met the early results for friction and wear testing of parts manufactured on the smaller scale equipment.

Friction testing

Friction plays an important part in the success or failure of a set of seal faces. Not all materials make good seal faces. Some materials have properties that hold heat in the seal face, while others wear too much. Applying diamond to a seal face reduces both friction and wear. One of the best substrate materials for diamond is silicon carbide. Silicon carbide and diamond have very similar material properties. Results of friction testing for UNCD on a SiC face are as follows:

Carbon running against UNCD on silicon carbide μ = 0.07

Silicon carbide running against UNCD on silicon carbide μ = 0.04

The results for carbon versus UNCD on silicon carbide were expected. This is a normal value for friction in seal design work. The results for silicon carbide versus UNCD on silicon carbide were very good. When silicon carbide runs against itself without any diamond treatment, the coefficient of friction is greater than 0.1. For those applications requiring hard-on-hard seal faces, the application of a diamond-treated seal face is a major improvement. Several groups of seal faces have been tested, resulting in the same friction values.

Dynamic testing

An important step in qualifying materials for a mechanical seal is dynamic testing in hot water. This test involves running a 1.375 diameter seal in 250 F water at 100 psig and 3450 rpm. At these conditions, the pressure-velocity value for the seal is 170,000 psi x ft/min. This test in hot water is very demanding of the seal. Each test run consists of running a group of four pumps, three fi tted with seals treated with diamond and one without a treated surface. The results of hot-water testing were outstanding for the diamond-treated seals. Very minimal or no measureable wear occurred over the 100-hour test. The untreated silicon carbide seals in each case failed due to heavy wear across the entire seal face.

These results were typical for each test run. The UNCD-treated surfaces were in excellent condition with very little carbon wear. The untreated seal had high wear for both the carbon and silicon carbide seal faces.

An interesting measurement taken after testing was surface flatness. The diamond-treated
mechanical seal
had no change in surface flatness during testing. The untreated silicon carbide had an increase of 240 microinches. This is an indication that the untreated surface was running hotter than the diamond-treated surface. Continued increases in flatness or surface waviness will lead to unwanted seal leakage and wear.

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