• Flexible Bellow: Compensates for significant shaft end-play and misalignment.
• Friction Drive: The bellow grips the shaft to drive the face, requiring no set screws.
Key Features
• Classic Utility Seal: The standard replacement for John Crane Type 6, used in millions of water pumps, automotive cooling pumps, and light-duty industrial applications.
• Unitized Construction: One-piece assembly (bellow, spring, retainer) makes installation fast and fool-proof.
• Low Cost Reliability: The most economical mechanical seal design for low-pressure duties.
Technical Specs | Materials | ||
Mediums | Water, oil and weakly-corrosive mediums | Stationary Ring | Ceramic/Sic/TC |
Pressure | ≤2.5MPa | Rotary Ring | Carbon/Sic/TC |
Temperature | -20℃ to 120℃ | Secondary Seal | NBR/EPDM/Viton |
Speed | ≤15m/s | Spring and Metal Part | Stainless Steel |
Product Specifications
| Metric Shaft Size D1 | Size Code | D3 | D7 | L1 | L4 |
| 14 | 0140 | 24.0 | 25.0 | 23.0 | 12.0 |
| 16 | 0160 | 26.0 | 27.0 | 23.0 | 12.0 |
| 18 | 0180 | 32.0 | 33.0 | 24.0 | 13.5 |
| 20 | 0200 | 34.0 | 35.0 | 24.0 | 13.5 |
| 22 | 0220 | 36.0 | 37.0 | 24.0 | 13.5 |
| 24 | 0240 | 38.0 | 39.0 | 26.7 | 13.3 |
| 25 | 0250 | 39.0 | 40.0 | 27.0 | 13.0 |
| 28 | 0280 | 42.0 | 43.0 | 30.0 | 12.5 |
| 30 | 0300 | 44.0 | 45.0 | 30.5 | 12.0 |
| 32 | 0320 | 46.0 | 48.0 | 30.5 | 12.0 |
| 33 | 0330 | 47.0 | 48.0 | 30.5 | 12.0 |
| 35 | 0350 | 49.0 | 50.0 | 30.5 | 12.0 |
| 38 | 0380 | 54.0 | 56.0 | 32.0 | 13.0 |
| 40 | 0400 | 56.0 | 58.0 | 32.0 | 13.0 |
| 43 | 0430 | 59.0 | 61.0 | 32.0 | 13.0 |
| 45 | 0450 | 61.0 | 63.0 | 32.0 | 13.0 |
| 48 | 0480 | 64.0 | 66.0 | 32.0 | 13.0 |
| 50 | 0500 | 66.0 | 70.0 | 34.0 | 13.5 |
| 53 | 0530 | 69.0 | 73.0 | 34.0 | 13.5 |
| 55 | 0550 | 71.0 | 75.0 | 34.0 | 13.5 |
| 58 | 0580 | 78.0 | 78.0 | 39.0 | 13.5 |
| 60 | 0600 | 80.0 | 80.0 | 39.0 | 13.5 |
| 63 | 0630 | 83.0 | 83.0 | 39.0 | 13.5 |
| 65 | 0650 | 85.0 | 85.0 | 39.0 | 13.5 |
| 68 | 0680 | 88.0 | 90.0 | 39.0 | 13.5 |
| 70 | 0700 | 89.0 | 92.0 | 45.5 | 14.5 |
| 75 | 0750 | 96.0 | 97.0 | 45.5 | 14.5 |
| 80 | 0800 | 104.0 | 105.0 | 45.0 | 15.0 |
| 85 | 0850 | 108.0 | 110.0 | 45.0 | 15.0 |
| 90 | 0900 | 114.0 | 115.0 | 50.0 | 15.0 |
| 95 | 0950 | 118.0 | 120.0 | 50.0 | 15.0 |
| 100 | 1000 | 124.0 | 125.0 | 50.0 | 15.0 |
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.
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.
Industry Solutions
Case Study
Cooling Tower: Replaced seals on 20 small circulation pumps. The Type 6 kits were easy to install for the junior technicians and restored the system to full capacity.
Testimonials
We buy these by the bucket load. They fit everything from pool pumps to truck coolants.
—MRO Distributor, USA
FAQs about Metal Bellows Seals for High Temperature Pumps
Q: Is this the same as Type 21?
A: No. Type 6 is shorter and has a different drive method. They are not interchangeable. Check your working length.
Our company is specialized in the production of sealing materials, mechanical seals , cartridge seals.
E-mail: gechacha@aliyun.com
Mobile: +86-18758835650
WhatsApp: +86-18758835650
Add: No8-2, Jinsha road Yuelin Street, Fenghua District, Ningbo, Zhejiang
