(ES915 – ES920) Without Bearing Assembly for Top and Side Entry Rotating Equipment
SEO line: Single-pressurized mechanical seal for agitators, mixers, and top-entry rotating equipment applications.
Description:
The ES915 / ES920 is a single, pressurized, liquid-lubricated mechanical seal engineered specifically for top and side entry agitators, mixers, and similar rotating equipment. This fully assembled cartridge-type seal, available in both balanced and unbalanced configurations, delivers zero leakage performance for applications handling hazardous or environmentally sensitive media.
Supplied as a pre-assembled, factory-tested unit, the seal ensures rapid installation, minimal downtime, and exceptional reliability. With no integrated bearing assembly, it is designed for systems where external shaft support is provided by the equipment. Extensive material options make this seal a cost-efficient solution for general-duty applications across all process industries.
Key Features:
- Bi-Directional Operation—Functions independently of shaft rotation direction.
- Multiple Spring Design—Uniform face loading and consistent sealing performance.
- Factory Assembled and Tested – Quality assurance and reduced on-site commissioning.
- Single Seal Configuration—Reliable sealing for moderate to demanding process conditions.
- Custom Engineering Available—Non-standard dimensions and exotic materials upon request.
- No Bearing Assembly Required—Simplified mechanical design reduces maintenance requirements.
- Cartridge Construction – Pre-assembled unit minimizes installation errors and commissioning time.
- Zero Leakage Performance—Engineered for environmental containment and regulatory compliance.
- Balanced and Unbalanced Options – Accommodates varying pressure ranges and media characteristics.
- Externally Mounted Design—Enhanced accessibility for installation, inspection, and maintenance operations.
- Wide Material Selection—Available in multiple face and elastomer combinations to suit a broad range of industrial media.
- Non-Metallic Wetted Parts (Optional)—Prevents corrosion and product contamination in aggressive or hygienic environments.
- Top and Side Entry Installation—Engineered specifically for equipment with top or side shaft entry (not suitable for bottom entry).
- Liquid-Lubricated with Optional Cooling System—Maintains optimal seal face conditions and extends seal life under demanding operations.
Service Overview:
| Parameter | Specification |
| Seal Type | Single-pressurised, liquid-lubricated |
| Configuration | Balanced and unbalanced options |
| Installation | Top and side entry (externally mounted) |
| Lubrication | Liquid-lubricated with optional cooling |
| Construction | Cartridge-type, pre-assembled |
| Bearing Support | External (no integrated bearing assembly) |
Technical Specifications:
| Parameter | Range | Notes |
| Shaft Diameter | 20.0 – 300.0 mm (0.750″ – 12.000″) | Standard sizes |
| Pressure Range | Vacuum to 6 bars (87 PSI) | Material dependent |
| Temperature | -20°C to +150°C (-4°F to +302°F) | Elastomer dependent |
| Speed Limit | 150 RPM maximum | Application dependent |
| Seal Arrangement | API 682 Category 1 (single seal) | Per API 682 standard |
Materials of Construction:
| Component | Standard Materials | Optional Materials |
| Seal Faces | Carbon vs. Ceramic | Silicon Carbide, Tungsten Carbide |
| Elastomers | NBR (Nitrile), FKM (Viton) | EPDM, Aflas, PTFE, Kalrez (FFKM) |
| Hardware | SS 316, SS 316L | Duplex, Hastelloy C, Alloy 20 |
| Springs | SS 316 | Hastelloy C, Inconel |
| Wetted Parts | Metallic construction | Non-metallic (PTFE, PFA) |
Applications:
Primary Industries:
- Paint, Coatings & Adhesives
- Pulp & Paper Manufacturing
- Food & Beverage Processing
- Water & Wastewater Treatment
- Pharmaceutical & Biotechnology
- Chemical & Petrochemical Processing
Equipment Types:
- Reactor Vessels
- Side Entry Mixers
- Process Tanks and Vessels
- Polymerization Equipment
- Top Entry Agitators and Mixers
Operating Limits & Safety Notes:
Critical Limitations:
- Liquid lubrication is essential for proper operation
- External shaft support required – no integrated bearing assembly
- Operating limits vary based on selected materials and process conditions
- NOT suitable for bottom-entry applications due to gravity-induced leakage risks
Engineering Requirements:
- Installation per manufacturer’s procedures mandatory
- Process data review required for material selection optimization
- Monitoring systems recommended for critical or regulated services
- Compliance with applicable safety and environmental regulations required
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