• Heat-Treated Faces: We use Sintered Silicon Carbide faces which have superior thermal conductivity, pulling heat away from the sensitive O-rings to extend their life.
• Anti-Extrusion Design: Includes backup rings or specially designed grooves to prevent the O-ring from extruding under high pressure when the rubber softens at heat.
Key Features
• High-Heat Elastomers: Specifically configured with high-performance O-rings like FKM (Viton®), AFLAS®, or FFKM to survive in pumps operating above 150°C.
• Thermal Stability: The seal design includes increased clearances to accommodate the thermal expansion of metal parts at high temperatures without binding.
• Hot Water & Steam Ready: When equipped with peroxide-cured EPDM or AFLAS, these seals resist the steam / hot water attack that degrades standard nitrile rubber.
Technical Specs | Materials | ||
Mediums | Water, oil, acids, alkali, etc. | Stationary Ring | Carbon/Sic/TC |
Temperature | -20℃ to 200℃ | Rotary Ring | Carbon/Sic/TC/SUS304 |
Pressure | ≤2.5MPa | Secondary Seal | NBR/EPDM/Viton |
Speed | ≤18m/s | Spring and Metal Part | Stainless Steel |
Product Specifications
| Metric Shaft Size D1 | Size Code | D2 | D3 | D7 | L1 | L4 | L3 |
| 14 | 0140 | 18 | 33.0 | 25.0 | 32.5 | 10.00 | 8.0 |
| 16 | 0160 | 20 | 35.0 | 27.0 | 32.5 | 10.00 | 8.0 |
| 18 | 0180 | 22 | 37.0 | 33.0 | 33.5 | 11.50 | 8.5 |
| 20 | 0200 | 24 | 39.0 | 35.0 | 33.5 | 11.50 | 8.5 |
| 22 | 0220 | 26 | 40.0 | 37.0 | 33.5 | 11.50 | 8.5 |
| 24 | 0240 | 28 | 43.0 | 37.0 | 36.0 | 11.50 | 8.5 |
| 25 | 0250 | 30 | 45.0 | 40.0 | 36.0 | 11.50 | 8.5 |
| 28 | 0280 | 33 | 48.0 | 43.0 | 38.5 | 11.50 | 8.5 |
| 30 | 0300 | 35 | 50.0 | 45.0 | 38.5 | 11.50 | 8.5 |
| 32 | 0320 | 38 | 55.0 | 48.0 | 38.5 | 11.50 | 8.5 |
| 33 | 0330 | 38 | 55.0 | 48.0 | 38.5 | 11.50 | 8.5 |
| 35 | 0350 | 40 | 57.0 | 50.0 | 38.5 | 11.50 | 8.5 |
| 38 | 0380 | 43 | 60.0 | 56.0 | 38.5 | 14.00 | 9.0 |
| 40 | 0400 | 45 | 62.0 | 58.0 | 38.5 | 14.00 | 9.0 |
| 43 | 0430 | 48 | 65.0 | 61.0 | 38.5 | 14.00 | 9.0 |
| 45 | 0450 | 50 | 67.0 | 63.0 | 38.5 | 14.00 | 9.0 |
| 48 | 0480 | 53 | 70.0 | 66.0 | 38.5 | 14.00 | 9.0 |
| 50 | 0500 | 55 | 72.0 | 70.0 | 42.5 | 15.00 | 10.0 |
| 53 | 0530 | 58 | 79.0 | 73.0 | 42.5 | 15.00 | 10.0 |
| 55 | 0550 | 60 | 81.0 | 75.0 | 42.5 | 15.00 | 10.0 |
| 58 | 0580 | 63 | 84.0 | 78.0 | 47.5 | 15.00 | 10.0 |
| 60 | 0600 | 65 | 86.0 | 80.0 | 47.5 | 15.00 | 10.0 |
| 63 | 0630 | 68 | 89.0 | 83.0 | 47.5 | 15.00 | 10.0 |
| 65 | 0650 | 70 | 91.0 | 85.0 | 47.5 | 15.00 | 10.0 |
| 70 | 0700 | 75 | 99.0 | 92.0 | 52.0 | 18.00 | 10.0 |
| 75 | 0750 | 80 | 104.0 | 97.0 | 52.0 | 18.00 | 10.0 |
| 80 | 0800 | 85 | 109.0 | 105.0 | 51.8 | 18.20 | 9.8 |
| 85 | 0850 | 90 | 114.0 | 110.0 | 56.8 | 18.20 | 9.8 |
| 90 | 0900 | 95 | 119.0 | 115.0 | 56.8 | 18.20 | 9.8 |
| 95 | 0950 | 100 | 124.0 | 120.0 | 57.8 | 17.20 | 10.8 |
| 100 | 1000 | 105 | 129.0 | 125.0 | 57.8 | 17.20 | 10.8 |
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
District Heating: A district heating network faced seal failures every winter due to 140°C water. We supplied this seal with AFLAS O-rings. The specialized rubber withstood the hot water and steam, lasting through the entire heating season.
Testimonials
Standard Viton failed in our steam condensate lines. These high-temp rubber seals held up. Great technical advice on material selection.
—Facility Engineer, Hospital
FAQs about Metal Bellows Seals for High Temperature Pumps
Q: Is FKM (Viton) good for steam?
A: Generally, no. Standard FKM hydrolyzes (breaks down) in steam. For hot water/steam above 120°C, we recommend AFLAS® or EPDM. FKM is better for hot oil.
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
