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

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John crane replacement

John Crane Double Cartridge Mechanical Seal

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John Crane Type 6 Elastomer Bellows Seals Kits Copy
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John Crane Double Cartridge Mechanical Seal

• Face-to-Face or Tandem: Modular design allows for different dual seal arrangements to suit API Plan 52 or 53.

• Engineered Faces: Faces are optimized for low heat generation, extending the life of both the seal and the barrier fluid.

Model:2
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Key Features

• Zero Emissions: A dual-pressurized cartridge seal designed for hazardous, toxic, or volatile fluids.

• Gas Lubricated (Hybrid): The "LP" typically stands for specialized face geometry (sometimes gas-lift or liquid lubricated depending on config) for low emission performance.

• Integrated Pumping: Features a highly efficient internal pumping ring to circulate barrier fluid for cooling.



Technical Specs

Materials

Mediums

Water, oil and weakly-corrosive mediums

Stationary Ring

Ceramic/Sic/TC

Pressure

≤1.4MPa

Rotary Ring

Carbon/Sic/TC

Temperature

-20℃ to 120℃

Secondary Seal

NBR/EPDM/Viton

Speed

≤15m/s

Spring and Metal Part

Stainless Steel


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Product Specifications

D1 (inch) Size Code D1 (mm) Size Code D3 D7 L1 L4
0.500 0127 12 0120 30.14 25.40 20.64 7.93
14 0140 33.32 31.75 22.23 10.30
0.625 0158 16 0160 33.32 31.75 22.23 10.30
0.750 0191 18 0180 36.50 34.93 22.23 10.30
20 0200 39.67 38.10 23.80 10.30
0.875 0222 22 0220 39.67 38.10 23.80 10.30
24 0240 45.50 41.28 25.40 11.10
1.000 0254 25 0250 45.50 41.28 25.40 11.10
1.125 0286 28 0280 48.50 44.44 26.97 11.10
30 0300 52.37 47.63 26.97 11.10
1.250 0317 32 0320 52.37 47.63 26.97 11.10
33 0330 56.00 50.80 28.58 11.10
1.375 0349 35 0350 56.00 50.80 28.58 11.10
1.500 0381 38 0380 59.20 53.98 28.58 11.10
1.625 0412 40 0400 67.00 60.33 34.93 12.70
43 0430 69.85 63.50 34.93 12.70
1.750 0444 45 0450 69.85 63.50 34.93 12.70
1.875 0476 48 0480 73.03 66.68 38.10 12.70
2.000 0508 50 0500 76.20 69.85 38.10 12.70
2.125 0539 53 0530 82.55 76.20 42.85 14.28
2.250 0571 55 0550 85.73 79.38 42.85 14.28
2.375 0603 60 0600 88.90 82.55 46.02 14.28
2.500 0635 63 0630 92.08 85.73 46.02 14.28
2.625 0666 65 0650 98.43 85.73 49.20 15.90
2.750 0698 70 0700 101.60 88.90 49.20 15.90
2.875 0730 73 0730 104.78 95.25 52.37 15.90
3.000 0762 75 0750 107.95 98.43 52.37 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.


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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

Benzene Transfer: Strict emissions regulations required a double seal upgrade. We installed the 48LP equivalent with Plan 53A. The seal has operated with zero detectable emissions for 3 years.

Testimonials

A premium double seal. We use it on our most critical chemical reactors and pumps.

—EHS Manager, Chemical Plant



FAQs about Metal Bellows Seals for High Temperature Pumps

Q: Does this require a gas panel?

A: If configured as a liquid-lubricated dual seal (standard), it needs a fluid reservoir (Plan 53). If configured for gas lift (Type 28 style), it needs a gas panel. Please specify your barrier media.

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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