John crane 2100 mechanical seal, Bellows Shaft Seal Manufacturer from China-MIAOYU Factory

John Crane Type 2100 Elastomer Bellows Shaft Seal

John Crane Type 2100 Elastomer Bellows Shaft Seal

John Crane Type 2100 Elastomer Bellows Shaft Seal

The John Crane 2100 elastomer bellows shaft seal is a heavy-duty, unitized cartridge seal designed for demanding industrial centrifugal and process pumps. Engineered as a direct OEM replacement, John Crane 2100 mechanical seal features a robust, full-convolution elastomer bellows (NBR or Viton) that eliminates the need for dynamic O-rings, preventing hang-up in sticky or viscous media. This unbalanced seal is known for its simplified installation, excellent vibration damping, and reliable performance in water, oils, chemicals, and light slurries. With standard face materials like Carbon vs. Silicon Carbide (SiC) and a durable metal construction, the John crane shaft seal is a versatile solution for general industrial service, wastewater, and cooling tower applications.

Model:2100

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Key Features

• Metric Heavy Duty: A rugged, single-spring elastomer bellow seal designed to DIN 24960 standards, such as the John Crane shaft seal series, offers reliable performance in demanding industrial applications.

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

• Robust Drive: The full-convolution bellow provides superior torque transmission and shaft grip compared to lighter duty seals, making it a key feature of high-performance elastomer bellows seal designs.

• No Drive Pin Needed: The bellow strength allows it to drive the face directly, simplifying the design and protecting the shaft — a defining advantage of the elastomer bellows seal construction.

• Non-Clogging: The large single spring resists fouling in wastewater applications, a feature commonly found in the John Crane shaft seal product line.

• Cost-Effective Reliability: Offers OEM-level performance for general-purpose services with fewer failure-prone components. The bellows shaft seal design provides excellent durability and service life at a lower total cost of ownership compared to more complex balanced cartridge seals for standard pressure duties.

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

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 john crane 2100 mechanical seal machining accuracy and production efficiency, meeting various high-specification manufacturing requirements.

Product Research, Development and Testing

Our Product R&D and Testing focuses on optimizing seal performance through advanced simulation and material analysis. All John Crane 2100 mechanical seals undergo rigorous trials, including thermal cycling and pressure tests, to ensure durability, minimal leakage, and long service life in demanding industrial environments.

john crane 2100 mechanical seal R&D and Design.jpg

john crane 2100 mechanical seal microscope.jpg

john crane 2100 mechanical seal Light band detection.jpg

john crane 2100 mechanical seal pressure test.jpg

Industry Solutions

Case Study

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

Testimonials

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

—Pump Repair Shop, France

FAQs about John Crane 2100 mechanical seal

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.

Q: What is the main difference between John crane 2100 mechanical seal and your RM 2100 seal?

A: There is no functional difference in performance. Our RM 2100 is a direct dimensional and functional replacement for the OEM John crane 2100 mechanical seal. It maintains the same unitized elastomer bellows design, single spring, and DIN/ISO dimensions for a drop-in fit in pumps and mixers originally equipped with the 2100 series.

Q: What is a John Crane Type 2100 Elastomer Bellows Shaft Seal?

A: The John Crane Type 2100 is a high-performance elastomer bellows seal designed for general-purpose industrial applications. It combines a rugged bellows shaft seal construction with a single-spring design, offering reliable sealing in water, wastewater, and light chemical services.

Q: In which applications is the John Crane Type 2100 bellows shaft seal typically used?

A: This bellows shaft seal is ideal for general-purpose services including centrifugal pumps, mixers, and agitators handling clean or slightly contaminated liquids. It performs well in water, wastewater, HVAC, and light chemical processing where standard pressure duties apply.