• Stepped Sleeve Design: For balanced seals, we provide the necessary stepped sleeve to achieve the hydraulic balance ratio without modifying your pump shaft.
• Anti-Rotation Lugs: Heavy-duty drive lugs are incorporated to prevent face rotation under the high torque loads common in high-pressure sealing.
Key Features
• Versatile Options: Choose Unbalanced for general chemical duties (up to 12 bar) or Balanced for high-pressure/low-SG fluids (up to 35 bar).
• Reduced Heat Generation (Balanced): The balanced geometry significantly lowers face friction heat, preventing fluid vaporization and extending face life.
• Chemical Inertness: Both versions utilize the same high-purity PTFE wedge technology for maximum corrosion resistance.
Technical Specs | Materials | ||
Mediums | Petroleum, chemical solvents, medium corrosion. | Stationary Ring | Ceramic/Sic/TC |
Temperature | 30℃ to 200℃ | Rotary Ring | Carbon/Sic/TC |
Pressure | ≤2.5MPa | Secondary Seal | PTFE |
Speed | ≤25m/s | Spring and Metal Part | Stainless Steel |
Product Specifications
| Metric Shaft Size D1 | Size Code | D2 | D3 | D7 | L1 | L4 | L3 |
| 14 | 0140 | 18 | 32 | 25 | 30.7 | 12 | 6 |
| 16 | 0160 | 20 | 34 | 27 | 30.7 | 12 | 6 |
| 18 | 0180 | 22 | 36 | 33 | 31.7 | 13.5 | 6.5 |
| 20 | 0200 | 24 | 38 | 35 | 31.7 | 13.5 | 6.5 |
| 22 | 0220 | 26 | 40 | 37 | 31.7 | 13.5 | 6.5 |
| 24 | 0240 | 28 | 42 | 39 | 34.4 | 13.5 | 6.5 |
| 25 | 0250 | 30 | 44 | 40 | 34.7 | 13 | 7 |
| 28 | 0280 | 38 | 47 | 43 | 37.7 | 12.5 | 7.5 |
| 30 | 0300 | 35 | 49 | 45 | 38.2 | 12 | 8 |
| 32 | 0320 | 38 | 54 | 48 | 38.2 | 12 | 8 |
| 33 | 0330 | 38 | 54 | 48 | 38.2 | 12 | 8 |
| 35 | 0350 | 40 | 56 | 50 | 38.2 | 12 | 8 |
| 38 | 0380 | 43 | 59 | 56 | 39.7 | 13 | 10 |
| 40 | 0400 | 45 | 61 | 58 | 39.7 | 13 | 10 |
| 43 | 0430 | 48 | 64 | 61 | 39.7 | 13 | 10 |
| 45 | 0450 | 50 | 66 | 63 | 39.7 | 13 | 10 |
| 48 | 0480 | 53 | 69 | 66 | 39.7 | 13 | 10 |
| 50 | 0500 | 55 | 71 | 70 | 44.2 | 13.5 | 11.5 |
| 53 | 0530 | 58 | 78 | 73 | 44.2 | 13.5 | 11.5 |
| 55 | 0550 | 60 | 80 | 75 | 44.2 | 13.5 | 11.5 |
| 58 | 0580 | 63 | 83 | 78 | 49.2 | 13.5 | 11.5 |
| 60 | 0600 | 65 | 85 | 80 | 49.2 | 13.5 | 11.5 |
| 63 | 0630 | 68 | 88 | 83 | 49.2 | 13.5 | 11.5 |
| 65 | 0650 | 70 | 90 | 85 | 49.2 | 13.5 | 11.5 |
| 70 | 0700 | 75 | 95 | 92 | 55.7 | 14.5 | 13.5 |
| 75 | 0750 | 80 | 104 | 97 | 55.7 | 14.5 | 13.5 |
| 80 | 0800 | 85 | 109 | 105 | 55.2 | 15 | 13 |
| 85 | 0850 | 90 | 114 | 110 | 60.2 | 15 | 13 |
| 90 | 0900 | 95 | 119 | 115 | 60.2 | 15 | 13 |
| 95 | 0950 | 100 | 124 | 120 | 60.2 | 15 | 13 |
| 100 | 1000 | 105 | 129 | 125 | 60.2 | 15 | 13 |
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
High-Pressure Reactor Feed: A chemical plant needed to seal a reactor feed pump operating at 25 bar. Unbalanced seals were wearing out in weeks. We supplied a Balanced PTFE Wedge Seal. The reduced face closing force lowered the operating temperature, stopping the premature wear.
Testimonials
We upgraded from unbalanced to balanced seals on our boiler feed chemical injection pumps. The reliability gain was immediate.
—Reliability Engineer, Power Station
FAQs about Metal Bellows Seals for High Temperature Pumps
Q: When should I use a Balanced seal?
A: You should switch to a Balanced seal if your operating pressure exceeds 10-12 bar, or if you are pumping fluids with a low specific gravity (volatile fluids) where heat generation could cause flashing.
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
