• Positive Torque Drive: The cartridge sleeve locks firmly to the shaft, preventing the seal from slipping even when the gear pump handles cold, thick oil.
• Compact Gland: The gland plate is minimized to fit the bolt patterns of common internal gear pumps.
Key Features
• Gear Pump Specialist: A cartridge version of the Type 21 seal, designed specifically for the tight tolerances and viscous fluids (oil, syrup, polymers) handled by gear pumps.
• Viscosity Handling: The robust drive mechanism and O-ring mount are engineered to resist the high torque required to seal thick, viscous fluids.
• Easy Retrofit: Converts standard gear pumps (e.g., Viking, Roper) from packing to mechanical seals without machining the housing.
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
Lube Oil System: A Viking gear pump unloading lube oil trucks was leaking at the packing gland. We installed this Type 21 Cartridge. The cartridge design made installation easy on the truck, and the seal eliminated the oil mess completely.
Testimonials
Installing seals on gear pumps used to be a headache. This cartridge drops right in. Perfect for our molasses pumps.
—Maintenance Tech, Sugar Mill
FAQs about Metal Bellows Seals for High Temperature Pumps
Q: Does this fit a Viking Pump?
A: Yes, we have specific cartridge models designed to fit the stuffing box dimensions of Viking Universal Seal series pumps. Please provide the pump model.
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
