Replace John Crane Type 1

Brand Name:JG

Certification:FDA certificate

Model Number:T-100

Minimum Order Quantity:1pcs

Delivery Time:3~10DAYS

Payment Terms:T/T,Western Union,MoneyGram

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Jiaxing Burgmann Mechanical Seal Co., Ltd. Jiashan King Kong Branch

Verified Supplier

Location: Jiaxing Zhejiang China

Address: No. 28 No. 28 Chengxi Road, Jiashan County, Jiaxing, Zhejiang, China 314100

Supplier`s last login times: within 39 hours

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Product Details

Replace John Crane Type 1

Product Overview

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