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

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John crane replacement

John Crane RM 2100 Elastomer Bellows Shaft Seal

John Crane RM 2100 Elastomer Bellows Shaft Seal
John Crane RM 2100 Elastomer Bellows Shaft Seal
John Crane RM 2100 Elastomer Bellows Shaft Seal
John Crane RM 2100 Elastomer Bellows Shaft Seal
thumb John Crane RM 2100 Elastomer Bellows Shaft Seal
John Crane RM 2100 Elastomer Bellows Shaft Seal
John Crane RM 2100 Elastomer Bellows Shaft Seal
John Crane RM 2100 Elastomer Bellows Shaft Seal

John Crane RM 2100 Elastomer Bellows Shaft Seal

• No Drive Pin Needed: The bellow strength allows it to drive the face directly, simplifying the design and protecting the shaft.

• Non-Clogging: The large single spring resists fouling in wastewater applications.

Model:2100
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Key Features

• Metric Heavy Duty: A rugged, single-spring elastomer bellow seal designed to DIN 24960 standards.

• Direct 2100 Replacement: 100% compatible with John Crane Type 2100 and similar metric bellow seals.

• Robust Drive: The full-convolution bellow provides superior torque transmission and shaft grip compared to lighter duty seals.



Technical Specs

Materials

Mediums

Water, oil, and weakly-corrosive mediums, etc.

Rotary Ring

Hot-pressing Carbon/Impregnated Carbon/SIC/TC

Temperature

-20℃ ~+150℃ US316

Stationary Ring

Ceramic/SIC/TC

Pressure

≤0.8Mpa

Secondary Seal

NBR/VITON

Speed

≤10m/sec

Spring & Other Parts

SUS304/SUS316


CF2100-1.jpg
CF2100-2.jpg



Product Specifications

2100S/K/N d D D1 L1 L2
2100S/K/N-3/8" 9.525 20 22.225 7.9 15.2
2100S/K/N-1/2" 12.7 24 25.4 7.9 15.2
2100S/K/N-5/8" 15.875 26 31.75 10.3 15.2
2100S/K/N-3/4" 19.05 32 34.93 10.3 20.2
2100S/K/N-1" 25.4 39 41.28 11.1 20.2
2100S/K/N-1-1/8" 28.575 42 44.45 11.1 26.2
2100S/K/N-1-1/4" 31.75 46 47.63 11.1 26.2
2100S/K/N-1-3/8" 34.925 49 50.8 11.1 26.2
2100S/K/N-1-1/2" 38.1 54 53.98 11.1 30.2
2100S/K/N-1-5/8" 41.275 56 60.33 12.7 30.2
2100S/K/N-1-3/4" 44.45 61 63.5 12.7 30.2
2100S/K/N-2-1/8" 53.975 69 76.2 14.3 30.2
2100S/K/N-2-1/4" 57.15 77 79.38 14.3 33.2
2100S/K/N-2-3/8" 60.325 80 82.55 14.3 33.2
2100S/K/N-2-1/2" 63.5 83 85.73 14.3 33.2
2100S/K/N-2-5/8" 66.675 88 85.73 15.9 33.2
2100S/K/N-2-3/4" 69.85 89 88.9 15.9 33.2
2100S/K/N-3" 76.2 99 98.425 15.9 40.2
2100S/K/N-3-1/8" 79.375 103 101.6 19.8 40.2
2100S/K/N-3-1/4" 82.55 104 104.775 19.8 40.2
2100S/K/N-3-3/8" 85.725 108 107.95 19.8 40.2
2100S/K/N-3-1/2" 88.9 112 111.125 19.8 40.2
2100S/K/N-3-5/8" 92.075 114 114.3 19.8 40.2
2100S/K/N-3-3/4" 95.25 118 117.475 19.8 40.2
2100S/K/N-3-7/8" 98.425 122 120.65 19.8 40.2
2100S/K/N-4" 101.6 124 123.83 19.8 40.2


2100S/K/N d D D1 L1 L2 L3 L4
2100S/K/N-10 10 20 21 5 15.2 27.7 35.2
2100S/K/N-12 12 22 23 6 15.2 26.7 34.2
2100S/K/N-14 14 24 25 6 15.2 29.2 34.2
2100S/K/N-15 15 25 26 6 15.2 29.2 34.2
2100S/K/N-16 16 26 27 6 15.2 29.2 34.2
2100S/K/N-18 18 32 33 6 20.2 31.7 39.2
2100S/K/N-20 20 34 35 6 20.2 31.7 39.2
2100S/K/N-22 22 36 37 6 20.2 31.7 39.2
2100S/K/N-24 24 38 39 6 20.2 34.2 44.2
2100S/K/N-25 25 39 40 6 20.2 34.2 44.2
2100S/K/N-28 28 42 43 6 26.2 36.7 44.2
2100S/K/N-30 30 44 45 7 26.2 35.7 43.2
2100S/K/N-32 32 46 48 7 26.2 35.7 48.2
2100S/K/N-33 33 47 48 7 26.2 35.7 48.2
2100S/K/N-35 35 49 50 8 26.2 34.7 47.2
2100S/K/N-38 38 54 56 8 30.2 37.2 47.2
2100S/K/N-40 40 56 58 8 30.2 37.2 47.2
2100S/K/N-43 43 59 61 8 30.2 37.2 52.2
2100S/K/N-45 45 61 63 8 30.2 37.2 52.2
2100S/K/N-48 48 64 66 10 30.2 35.2 50.2
2100S/K/N-50 50 66 70 10 30.2 37.7 50.2
2100S/K/N-53 53 69 73 10 30.2 37.7 60.2
2100S/K/N-55 55 71 75 10 30.2 37.7 60.2
2100S/K/N-58 58 78 78 10 33.2 42.7 60.2
2100S/K/N-60 60 80 80 12 33.2 40.7 58.2
2100S/K/N-63 63 83 83 12 33.2 40.7 58.2
2100S/K/N-65 65 85 85 12 33.2 40.7 68.2
2100S/K/N-68 68 88 90 12 33.2 40.7 68.2
2100S/K/N-70 70 90 92 12 33.2 48.2 68.2
2100S/K/N-75 75 99 97 12 40.2 48.2 68.2
2100S/K/N-80 80 104 105 14 40.2 47.7 77.7
2100S/K/N-85 85 109 110 14 40.2 47.7 77.7
2100S/K/N-90 90 114 115 14 40.2 52.7 77.7
2100S/K/N-95 95 119 120 14 40.2 52.7 77.7
2100S/K/N-100 100 124 125 14 40.2 52.7 77.7



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
Light band detection.jpg
pressure test.jpg



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

Wastewater Mixer: Submersible mixers were failing due to ragging. We installed RM 2100 seals with SiC faces. The smooth bellow resisted debris accumulation, and the seal held up to the vibration.

Testimonials

The 2100 is our standard metric repair seal. Excellent quality and fits KSB pumps perfectly.

—Pump Repair Shop, France



FAQs about Metal Bellows Seals for High Temperature Pumps

Q: Is this for water only?

A: No, with FKM bellows and SiC faces, it is an excellent seal for industrial wastewater, light oils, and mild chemicals.

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