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NINGBO MIAOYU MACHINERY TECHNOLOGY CO., LTDNINGBO MIAOYU MACHINERY TECHNOLOGY CO., LTD

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Elastomer Bellow Shaft Seals

Elastomer Mechanical Shaft Seals for Vacuum Pump

AES W01 W02 Elastomeric Bellow Mechanical Seal Replacement Copy
AES W01 W02 Elastomeric Bellow Mechanical Seal Replacement Copy
AES W01 W02 Elastomeric Bellow Mechanical Seal Replacement Copy
thumb AES W01 W02 Elastomeric Bellow Mechanical Seal Replacement Copy
AES W01 W02 Elastomeric Bellow Mechanical Seal Replacement Copy
AES W01 W02 Elastomeric Bellow Mechanical Seal Replacement Copy

Elastomer Mechanical Shaft Seals for Vacuum Pump

• Atmospheric Sealing: The seal face geometry is optimized to maintain lubrication even when the pressure differential is reversed (vacuum inside).

• Cavitation Resistance: Rugged construction withstands the vibration and hydraulic shock caused by cavitation in vacuum systems.

Model:1
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Key Features

• Vacuum Integrity: Designed to maintain a tight seal under negative pressure conditions, preventing air ingress that would break the vacuum.

• Compact Bellow Design: Fits the short working length typical of liquid ring vacuum pumps (e.g., Nash, Speck).

• Robust Torque Drive: The elastomer bellow transmits torque effectively even during the high-load start-up of liquid ring pumps.



Technical Specs

Materials

Mediums

Water, oil and weakly-corrosive mediums

Stationary Ring

Ceramic/Sic/TC

Pressure

≤1.4MPa

Rotary Ring

Carbon/Sic/TC

Temperature

-20C to 120C

Secondary Seal

NBR/EPDM/Viton

Speed

≤15m/s

Spring and Metal Part

Stainless Steel


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CF1-2.jpg



Product Specifications

D1 (inch) Size Code D1 (mm) Size Code D3 D7 L1 L4
0.500 0127 12 0120 23.80 25.40 30.16 7.93
14 0140 27.76 31.75 33.32 10.30
0.625 0158 16 0160 27.76 31.75 33.32 10.30
0.750 0191 18 0180 30.94 34.93 33.32 10.30
20 0200 34.11 38.10 34.93 10.30
0.875 0222 22 0220 34.11 38.10 34.93 10.30
24 0240 38.10 41.28 39.67 11.10
1.000 0254 25 0250 38.10 41.28 39.67 11.10
1.125 0286 28 0280 41.28 44.44 41.28 11.10
30 0300 46.02 47.63 41.28 11.10
1.250 0317 32 0320 46.02 47.63 41.28 11.10
33 0330 48.68 50.80 42.85 11.10
1.375 0349 35 0350 48.68 50.80 42.85 11.10
1.500 0381 38 0380 51.85 53.98 42.85 11.10
1.625 0412 40 0400 58.10 60.38 50.80 12.70
43 0430 61.27 63.50 50.80 12.70
1.750 0444 45 0450 61.27 63.50 50.80 12.70
1.875 0476 48 0480 64.44 66.68 53.98 12.70
2.000 0508 50 0500 67.21 69.85 53.98 12.70
2.125 0539 53 0530 72.02 76.20 60.33 14.28
2.250 0571 55 0550 75.30 79.38 60.33 14.28
2.375 0603 60 0600 78.30 82.55 63.50 14.28
2.500 0635 63 0630 81.54 85.73 63.50 14.28
2.625 0666 65 0650 86.22 85.73 69.85 15.90
2.750 0698 70 0700 89.40 88.90 73.03 15.90
2.875 0730 73 0730 92.57 95.25 73.03 15.90
3.000 0762 75 0750 95.75 98.43 73.03 15.90



Workshop

This workshop is equipped with professional processing equipment and integrated with standardized material warehousing management, enabling a one-stop production process from precision machining to finished product delivery. It ensures part machining accuracy and production efficiency, meeting various high-specification manufacturing requirements.


Metal Bellows Seals for High Temperature Pumps 606
Metal Bellows Seals for High Temperature Pumps 606
Metal Bellows Seals for High Temperature Pumps 606
Metal Bellows Seals for High Temperature Pumps 606



Product Research, Development and Testing

Our Product R&D and Testing focuses on optimizing seal performance through advanced simulation and material analysis. All seals undergo rigorous trials, including thermal cycling and pressure tests, to ensure durability, minimal leakage, and long service life in demanding industrial environments.


R&D and Design.jpg
microscope.jpg
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Industry Solutions

Metal Bellows Seals for High Temperature Pumps 606
Metal Bellows Seals for High Temperature Pumps 606
Metal Bellows Seals for High Temperature Pumps 606
Metal Bellows Seals for High Temperature Pumps 606




Case Study

Food Packaging: A vacuum pump on a packaging line was losing suction due to air leaks at the shaft seal. We replaced it with our Vacuum Elastomer Seal. The improved face flatness restored full vacuum capability and increased packaging speed.

Testimonials

Restored our old Nash pumps to full vacuum. These seals hold tight even when the pump cavitates.

—Plant Engineer, Paper Mill



FAQs about Metal Bellows Seals for High Temperature Pumps

Q: Why do standard seals fail in vacuum?

A: Standard seals rely on positive pressure to close the faces. In vacuum, pressure tries to open them. Our vacuum seals use specific spring ratios and balance to stay closed under vacuum.

Please Contact Us!
Get Started With Your Next Project.
If you have any questions about our products and services, please feel free to contact us. Our team will get in touch with you within 24 hours!
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    Our company is specialized in the production of sealing materials, mechanical seals , cartridge seals.

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