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

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John crane replacement

John Crane Pump Seals Replace for Multistage Pump

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Elastomer Mechanical Shaft Seals for Vacuum Pump Copy

John Crane Pump Seals Replace for Multistage Pump

• Stepped Shaft Requirement: Designed to fit stepped shafts to achieve hydraulic balance, reducing heat generation and face wear.

• Anti-Extrusion: Features tight-tolerance backup rings to prevent the PTFE wedge from extruding under high pressure.

Model:1
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Key Features

• High Pressure Wedge: The 109B is the balanced version of the Type 9, designed for high-pressure applications requiring chemical resistance.

• Multistage Specialist: Ideal for boiler feed, condensate, and hydrocarbon booster pumps where pressures exceed 20 bar.

• PTFE Wedge Reliability: The balanced wedge design prevents blowout under high pressure while maintaining chemical inertness.



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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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.


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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

Condensate Booster: A high-pressure condensate pump was leaking. We installed 109B replacements with Tungsten Carbide faces. The balanced design handled the 40 bar pressure, and the TC faces resisted the hot water flashing.

Testimonials

The 109B is a classic for a reason. Your replacements perform just as well as the originals in our high-pressure systems.

—Power Station Engineer



FAQs about Metal Bellows Seals for High Temperature Pumps

Q: Can this replace a Type 8B1?

A: They are similar balanced seals. 109B uses a PTFE wedge (Chemicals/High Temp), while 8B1 uses an O-ring (Oil/Water). Choose based on your fluid compatibility.

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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