Replace John Crane Type 1
Price:
USD
MOQ:
1pcs
Delivery Time:
3~10DAYS
Brand:
JG
Product Description
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
- 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
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Jiaxing Burgmann Mechanical Seal Co., Ltd. Jiashan King Kong Branch
Location
No. 28 No. 28 Chengxi Road, Jiashan County, Jiaxing, Zhejiang, China 314100
Contact Person
Doris Sun