Product Overview
UT-SeccoMix is a high-performance patented semi-cartridge dry-running mechanical seal independently developed and manufactured by UTTOX. Designed as a 100% direct drop-in replacement for original EagleBurgmann SeccoMix seals, it is specially engineered for industrial agitators, mixers, vacuum dryers and process reactors. Fully compatible with original installation dimensions and working parameters, this UTTOX seal eliminates traditional Plan 52/53 auxiliary flush systems, delivering identical stable performance, zero media contamination and far higher cost performance. With strictly controlled production precision and mature stable quality, it serves chemical, pharmaceutical and food & beverage production scenarios perfectly, acting as a reliable, cost-effective alternative solution for standard and mobile process vessels.
Key Features
100% Dry Running Operation: Requires no flush liquid or barrier fluid, preventing medium contamination and simplifying on-site piping and installation.
Passive Internal Air Cooling: Proprietary internal air circulation design dissipates frictional heat effectively, avoiding seal face overheating and eliminating squeaking noise during continuous dry running.
Atmosphere-Side Multi-Spring Structure: All springs are isolated from process media to prevent deposition, crystallization and clogging, greatly improving operational stability and service life.
Friction-Locked Shaft Drive: Protects agitator shafts from damage, tolerates normal axial and radial shaft deflection, and fits dynamic working conditions of industrial stirring equipment.
Bidirectional Rotation: Universal forward and reverse rotation adapts to diverse equipment layout and installation requirements.
Visual Wear Indicator: Built-in wear marking allows intuitive inspection of remaining service life, supporting predictive maintenance and reducing unplanned downtime.
Hygienic & Explosion-Proof Design: FDA-compliant wetted parts and full ATEX Zone 0 certification enable safe use in sanitary and explosive working environments.
Compact Semi-Cartridge Construction: Plug-and-play assembly simplifies on-site replacement and reduces installation time and labor costs.
Technical Characteristics
|
Seal Type |
Balanced outboard semi-cartridge mechanical seal |
|
Operation Mode |
Flush-free, dry running, passive air cooling |
|
Working Pressure |
Vacuum up to 6 bar (g) |
|
Sliding Speed |
Maximum 2 m/s, suitable for low-speed stirring equipment |
|
Operating Temperature |
-20 °C to 200 °C; up to 250 °C with optional cooling flange |
|
Standard Material Combination |
FDA-approved carbon graphite seal face, silicon carbide (SiC) seat; secondary seals in FKM, EPDM or PTFE; 316L stainless steel housing |
|
Product Models |
SeccoMix 1 (top-entry standard single-ended seal); SeccoMix R (side/bottom-entry dual seal for horizontal dryers) |
|
Certifications |
FDA food contact compliance, ATEX Zone 0 explosion-proof certification, TA-Luft compliance |
|
Shaft Tolerance |
Accommodates common shaft runout and axial displacement for agitator working conditions |


| D1(mm) | D1(INCH) | d2 | d3 | d4 | d5 | l3 | a1(min) | a1(max) | s |
| 25 | 1.000 | 34 | 68 | - | 148 | 40.5 | 100 | 132 | 11 |
| 28 | 1.125 | 34 | 68 | 55 | 148 | 40.5 | 100 | 132 | 11 |
| 30 | - | 34 | 68 | 55 | 148 | 40.5 | 100 | 132 | 11 |
| 32 | 1.250 | 39 | 73 | 60 | 153 | 40.5 | 105 | 137 | 11 |
| 35 | 1.375 | 39 | 73 | 60 | 153 | 40.5 | 105 | 37 | 11 |
| 38 | 1.500 | 44 | 78 | 65 | 158 | 40.5 | 110 | 142 | 11 |
| 40 | - | 44 | 78 | 65 | 158 | 40.5 | 110 | 142 | 11 |
| 45 | 1.625 | 49 | 83 | 68 | 163 | 40.5 | 115 | 152 | 11 |
| - | 1.750 | 49 | 83 | 68 | 163 | 40.5 | 115 | 152 | 11 |
| 48 | 1.875 | 54 | 88 | 73 | 178 | 40.5 | 125 | 160 | 14 |
| 50 | - | 54 | 88 | 73 | 178 | 40.5 | 125 | 160 | 14 |
| 55 | 2.000 | 59 | 93 | 78 | 183 | 40.5 | 130 | 165 | 14 |
| - | 2.125 | 59 | 93 | 78 | 183 | 40.5 | 130 | 165 | 14 |
| 60 | 2.250 | 64 | 98 | 85 | 188 | 40.5 | 135 | 170 | 14 |
| 65 | 2.375 | 69 | 103 | 90 | 193 | 40.5 | 140 | 175 | 14 |
| - | 2.500 | 69 | 103 | 90 | 193 | 40.5 | 140 | 175 | 14 |
| 70 | 2.625 | 74 | 108 | 95 | 198 | 43.5 | 145 | 180 | 14 |
| - | 2.750 | 74 | 108 | 95 | 198 | 43.5 | 145 | 180 | 14 |
| 75 | 2.875 | 79 | 113 | 100 | 203 | 43.5 | 150 | 185 | 14 |
| 80 | 3.000 | 84 | 118 | 105 | 208 | 43.5 | 155 | 190 | 14 |
| 85 | 3.250 | 89 | 123 | 110 | 213 | 43.5 | 160 | 195 | 14 |
| 90 | 3.500 | 94 | 128 | 115 | 218 | 43.5 | 165 | 200 | 14 |
| 95 | 3.750 | 99 | 133 | 120 | 223 | 43.5 | 170 | 205 | 14 |
| 100 | - | 104 | 138 | 125 | 228 | 43.5 | 175 | 210 | 14 |
| 105 | 4.000 | 109 | 143 | 130 | 233 | 43.5 | 180 | 215 | 14 |
| 110 | 4.250 | 114 | 148 | 135 | 238 | 43.5 | 185 | 220 | 14 |
| 115 | 4.500 | 119 | 153 | 140 | 267 | 43.5 | 196 | 243 | 18 |
| 125 | 4.750 | 129 | 163 | 150 | 277 | 43.5 | 206 | 253 | 18 |
| 140 | 5.000 | 144 | 178 | 165 | 297 | 43.5 | 221 | 273 | 18 |
| - | 5.250 | 144 | 178 | 165 | 297 | 43.5 | 221 | 273 | 18 |
| - | 5.500 | 144 | 178 | 165 | 297 | 43.5 | 221 | 273 | 18 |
| 150 | 5.750 | 154 | 188 | 175 | 307 | 43.5 | 231 | 283 | 18 |
| 160 | 6.000 | 164 | 198 | 185 | 317 | 43.5 | 241 | 293 | 18 |
| - | 6.250 | 164 | 198 | 185 | 317 | 43.5 | 241 | 293 | 18 |
Applications
EagleBurgmann SeccoMix dry-running seals are widely applied in contamination-sensitive, intermittent and vacuum process scenarios across multiple industries, ideal for equipment where liquid flushing is prohibited or impractical.
Industrial Equipment: Top-entry, side-entry and bottom-entry agitators, industrial mixers, kneaders, vacuum dryers and batch process reactors
Chemical & Petrochemical Industry: Sealing for non-toxic, viscous and slightly abrasive process media in batch production
Pharmaceutical Industry: Sanitary sealing for drug synthesis, vaccine production and high-purity pharmaceutical processing with zero contamination risk
Food & Beverage Industry: FDA-compliant sealing solution for food-grade mixing and vacuum processing equipment
Special Process Scenarios: Explosive environment production, vacuum reaction systems, mobile and skid-mounted process vessels with limited piping space
FAQ
Q: 1. Does the UTTOX SeccoMix mechanical seal require flush or barrier fluid to operate?
A: No. The UTTOX SeccoMix series is a fully flush-free dry-running seal. It relies on passive internal air circulation for cooling and requires no external Plan 52/53 auxiliary systems, completely eliminating liquid contamination to process media and simplifying on-site piping layout.
Q: 2. What is the difference between UTTOX SeccoMix 1 and SeccoMix R?
A: UTTOX SeccoMix 1 is the standard single-ended model designed for top-entry agitators, featuring compact semi-cartridge structure and fast plug-and-play installation. UTTOX SeccoMix R is optimized for side-entry, bottom-entry and horizontal vacuum dryers, supporting nitrogen-pressurized dual seal configuration for higher process safety and harsh working conditions.
Q: 3. Can UTTOX SeccoMix work under continuous dry-run conditions?
A: Yes. The proprietary internal air cooling structure effectively dissipates frictional heat, enabling stable and silent long-term dry-running operation. It avoids overheating failure and squeaking noise that commonly occurs in conventional dry seals, maintaining consistent long-term operating stability.
Q: 4. What temperature and pressure ranges can the UTTOX SeccoMix seal handle?
A: Standard operating temperature ranges from -20 °C to 200 °C; with an optional cooling flange, the maximum temperature can reach 250 °C. The working pressure covers vacuum up to 6 bar(g), fully matching the parameter range of the original EagleBurgmann version for diverse batch stirring and vacuum drying processes.
Q: 5. Is UTTOX SeccoMix suitable for food and pharmaceutical sanitary applications?
A: Absolutely. The wetted parts adopt FDA-compliant carbon graphite and silicon carbide materials with smooth, dead-space-free surfaces. It fully meets sanitary production requirements and supports high-purity processing in pharmaceutical and food & beverage industries.
Q: 6. Does UTTOX SeccoMix support explosion-proof working environments?
A: Yes. The seal complies with ATEX Zone 0 and TA-Luft compliance standards. It features structurally intrinsic safety and can be used in explosive environments without additional temperature monitoring devices.
Q: 7. Can the UTTOX SeccoMix seal tolerate agitator shaft deflection and runout?
A: Yes. Equipped with friction-locked shaft drive design, it effectively tolerates regular axial and radial shaft displacement and runout, perfectly adapting to the dynamic working characteristics of industrial agitators and avoiding seal damage caused by shaft deviation.
Q: 8. Is bidirectional rotation available for UTTOX SeccoMix?
A: Yes. The seal supports forward and reverse bidirectional rotation, with no need to confirm rotation direction during installation, greatly improving installation flexibility for different equipment layouts.
Q: 9. How to judge the service life and replace the UTTOX SeccoMix seal?
A: UTTOX SeccoMix is equipped with a built-in visual wear indicator. On-site operators can directly check the remaining wear allowance without disassembly, realizing predictive maintenance and avoiding unplanned production downtime.
Q: 10. What media and working scenarios are not suitable for UTTOX SeccoMix?
A: It is designed for low-speed stirring conditions with a maximum sliding speed of 2 m/s. It is not recommended for high-speed rotating equipment or media with large particle abrasion and strong corrosiveness. For special working conditions, customized configuration is available.
Q: 11. Can UTTOX SeccoMix fully replace the original EagleBurgmann SeccoMix seal?
A: Yes. UTTOX SeccoMix achieves 100% full compatibility and perfect replacement for the original EagleBurgmann SeccoMix mechanical seal. It adopts identical structural design, installation dimensions, material standards and operating parameters, enabling direct plug-and-play replacement without any equipment modification. With extremely stable product quality, consistent sealing performance and far superior cost performance, it effectively reduces procurement and maintenance costs while completely matching the original equipment operating standards, being the ideal upgraded alternative solution for original imported seals.
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