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{"title":"Replace John Crane Type 1","imgUrl":"https:\/\/img.chinax.com\/nimg\/8a\/2b\/b408bcbb3d3f42552bcd8418b628-200x200-1\/replace_john_crane_type_1.jpg","attrs":{"Brand Name":"JG","Model Number":"T-100","Certification":"FDA certificate","Place of Origin":"Zhejiang, China"}}
{"title":"Shaft Diameter 16-120mm Rubber Bellows Mechanical Seal Replace John Crane 2100","imgUrl":"https:\/\/img.chinax.com\/nimg\/53\/d5\/05af510f44aba1306856ad9e80fb-200x200-1\/shaft_diameter_16_120mm_rubber_bellows_mechanical_seal_replace_john_crane_2100.jpg","attrs":{"Brand Name":"JG","Model Number":"Replace John Crane 2100","Certification":"FDA certificate","Place of Origin":"Zhejiang, China"}}
{"title":"Replace Grundfos Seal 12mm Tc","imgUrl":"https:\/\/img.chinax.com\/nimg\/b7\/4a\/51c173e818ca4929b13e44f79dba-200x200-1\/replace_grundfos_seal_12mm_tc.jpg","attrs":{"Brand Name":"JG","Model Number":"A\/B","Certification":"FDA certificate","Place of Origin":"Zhejiang, China"}}
{"title":"Replace Grundfos Pump Single Spring Seal 16mm","imgUrl":"https:\/\/img.chinax.com\/nimg\/b1\/40\/e986519dc0920dac259d9c13e026-200x200-1\/replace_grundfos_pump_single_spring_seal_16mm.jpg","attrs":{"Brand Name":"JG","Model Number":"A\/B","Certification":"FDA certificate","Place of Origin":"Zhejiang, China"}}
{"title":"Lastomer Bellows John Crane TYPE 1 Mechanical Seal For Chemical Pump","imgUrl":"https:\/\/img.chinax.com\/nimg\/2e\/a1\/0a44a9ad4077d14d02496795bf5f-200x200-1\/lastomer_bellows_john_crane_type_1_mechanical_seal_for_chemical_pump.jpg","attrs":{"Brand Name":"JG","Model Number":"T-100","Certification":"ISO9000","Place of Origin":"Jiaxing, Zhejiang, China"}}
{"title":"John Crane Equivalent Water Pump Seals CAR \/ CER \/ NBR Material Made","imgUrl":"https:\/\/img.chinax.com\/nimg\/73\/cb\/48e0fa4f317de11d27a4d892c261-200x200-1\/john_crane_equivalent_water_pump_seals_car_2f_cer_2f_nbr_material_made.jpg","attrs":{"Brand Name":"JG","Model Number":"JG E","Certification":"ISO9001:2008","Place of Origin":"Zhejiang, China"}}
{"title":"Rubber Bellow Type Mechanical Seal MG12 Water Pump Seal Replacement Parts","imgUrl":"https:\/\/img.chinax.com\/nimg\/fa\/c0\/1e6fc9ff6b2d8771d7092388adb9-200x200-1\/rubber_bellow_type_mechanical_seal_mg12_water_pump_seal_replacement_parts.jpg","attrs":{"Brand Name":"JG","Model Number":"MG12","Certification":"FDA certificate","Place of Origin":"Zhejiang, China"}}
The John Crane Type 1 has long been the industry benchmark for non-pusher, elastomeric bellows seals in pumping systems worldwide. Our equivalent series is engineered to be 100% dimensionally interchangeable with the original, offering a robust alternative that reduces MRO costs without compromising on performance.
Designed for the most demanding environments, this seal excels in centrifugal pumps, rotary pumps, mixers, and agitators. By leveraging advanced material science and precision manufacturing, we provide a sealing solution that ensures maximum uptime and adheres to the highest ISO 3069 and ANSI standards.
Technical Specifications
Parameter
Range / Specification
Notes
Shaft Diameter
0.375" to 4.000" (9.5mm - 100mm)
Imperial & Metric sizes available
Max Pressure
≤ 20 bar (290 psi)
Dependent on shaft speed and media
Temperature
-40°C to +205°C
Based on elastomer selection (Viton/EPDM)
Max Velocity
≤ 13 m/s (2500 fpm)
Linear face speed limit
Rotary Face
Carbon / SiC / TC
Resin-impregnated or Metal-grade
Stationary Seat
Ceramic / SiC / TC
Available in various seat types
Spring & Hardware
SS304 / SS316
High corrosion resistance
Key Features & Technical Advantages
Self-Aligning Capability: The flexible rubber bellows automatically compensates for abnormal shaft end-play, run-out, and primary ring wear, ensuring consistent face contact.
Non-Clogging Single Spring: Unlike multi-spring designs, the heavy-duty single coil spring resists clogging in viscous or particle-laden fluids, maintaining seal integrity in "dirty" services.
Seamless Interchangeability: Fully compatible with the L3 operating length of John Crane Type 1, as well as Flowserve Pac-Seal 51, AESSEAL B01, and Vulcan Type 10.
Torque-Free Bellows: The drive is transmitted through the mechanical drive notches rather than the bellows, preventing over-stressing of the elastomer and extending its service life.
Application Versatility: Capable of handling a wide array of fluids, from potable water and lubrication oils to mild chemical slurries, depending on the elastomer configuration.
Performance Advantages
Spring unit averted from the product so no sticking and clogging of the springs
Safe operation (no fractures) because of seal face locking by square pin
Suitable for pressure reversals
Operation in vacuum without additional seat locking possible
No damage of the shaft by a dynamically loaded O-Ring
Small installation sizes
Best suitable for conversions, no adaptations of the pump
Insensitive to solid containing and abrasive media
Advantages of a balanced seal even with plain shafts
Insensitive to shaft movements because of the stationary design
Frequently Asked Questions
Is this seal a direct "drop-in" replacement for the John Crane Type 1?
Yes. Our seals are manufactured to the same dimensional standards (shaft size, outer diameter, and operating height), allowing for immediate installation without equipment modification.
Which face material is best for abrasive media?
For fluids containing grit or crystals, we recommend a Silicon Carbide (SiC) vs. Silicon Carbide face combination. SiC offers superior hardness and thermal conductivity compared to standard ceramic or carbon.
Why choose an equivalent seal over the OEM?
Our equivalent seals offer supply chain agility -- significantly shorter lead times and more competitive pricing -- while meeting or exceeding OEM performance specifications through rigorous pressure testing.
How do I identify the correct Stationary Seat for my pump?
The Type 1 typically uses an O-ring mount (Type 1 Seat) or a Cup-mount (Type 31 Seat). Please verify the bore depth of your seal chamber or provide a part number for our engineers to cross-reference.
Application Areas
Water and waste water technology
Chemical industry
Refining technology
Dirty, abrasive and solid containing media
Fugitive hydrocarbons (no API seal!)
Sticky and stringy media
Chemical standard pumps
Sewage pumps
Shipping & Payment Terms
Port of Loading: Shanghai
Shipping Method: DHL, UPS, FEDEX, TNT, etc
Payment Terms: T/T, Western Union, Money Gram
Our Services
OEM/ODM orders are available for our factory
Accept customized mechanical seals according to your drawing or requirements
Small quantity is accepted
Provides excellent quality with competitive price
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter,Trading Company,Seller
Year Established:
1992
Total Annual:
10milion-15milion
Employee Number:
80~100
Ecer Certification：
Verified Supplier
JIAXING BURGMANN is a professional manufacturer of mechanical seal for pump and autoclave used in the mining, industry, agriculture, flange, rubber ring, bushing, hard alloy and Sic. We are specialized in producing Burgmann series seals.
We have over 20 years production experience, wit... JIAXING BURGMANN is a professional manufacturer of mechanical seal for pump and autoclave used in the mining, industry, agriculture, flange, rubber ring, bushing, hard alloy and Sic. We are specialized in producing Burgmann series seals.
We have over 20 years production experience, wit...
