Multi-Entry Single Mechanical Seal System (With Bearing Assembly & Cooling Housing)

SEO line: Single cartridge mechanical seal with integrated bearing assembly and cooling housing for multi-entry rotating equipment, including glass-lined reactors.

Description:

The ES925/ES930 series is a single, cartridge-type mechanical seal designed with an integrated bearing assembly and lubricated cooling chamber, making it ideal for top, side, and bottom entry agitators, mixers, and reactors, including glass-lined equipment. The seal’s robust design ensures stable shaft support, efficient heat dissipation, and reliable sealing performance even under demanding process conditions.

This fully assembled and factory-tested seal system is engineered for easy installation and long-term service. The inclusion of a cooling jacket allows effective thermal regulation, which is essential for maintaining seal integrity in high-temperature or viscous media applications. Its compatibility with glass-lined reactors ensures safe and non-reactive sealing for corrosive and sensitive chemical processes.

Key Features:

• Cost-Effective Design: Engineered for durability and reliability while maintaining cost efficiency for general and critical applications.
• Externally Mounted Design: Enables easy access for inspection, adjustment, and servicing without disturbing the process equipment.
• Reverse Pressure Capability (Inboard): Enhances seal performance in applications with fluctuating or reverse pressure conditions.
• Cartridge Construction: Simplifies installation, eliminates setting errors, and reduces downtime during maintenance or seal replacement.
• Top, Side & Bottom Entry Suitability: Versatile design compatible with a wide range of equipment orientations and process configurations.
• Optional Non-Metallic Wetted Components: Prevents product contamination and corrosion in sensitive or aggressive chemical applications.
• Integrated Bearing Assembly: Offers enhanced shaft stability and radial load handling, critical for bottom-entry and long-shaft configurations.
• Monitoring Ready: Supports optional integration of temperature, pressure, or flush monitoring devices as required by application safety standards.
• Cooling & Lubrication Housing – Enhances heat dissipation and ensures proper lubrication of seal faces, reducing wear and extending service life.
• Bi-Directional Operation: Operates independently of shaft rotation direction, allowing use in both clockwise and counterclockwise rotating equipment.
• Balanced and Unbalanced Seal Options: Available in both configurations to suit varying pressure conditions, product viscosities, and operational loads.
• Rotary Multiple Spring Mechanism: Provides uniform face loading, accommodates shaft deflection, and maintains consistent sealing performance over time.
• Single Mechanical Seal Design: Provides effective and reliable sealing for general-duty and critical applications involving moderate pressure and temperature ranges.
• Glass-Lined Reactor Compatibility: Designed with chemically compatible, non-damaging materials for safe use in enamel-lined vessels handling corrosive or pure media.
• Custom-Engineered Solutions: A wide range of materials, face combinations, and dimensional configurations are available upon request to meet specific process requirements.
• Factory-Assembled & Pressure-Tested Unit: Supplied as a pre-assembled cartridge to ensure quality, dimensional accuracy, and leak-tight performance right from installation.

Why It Is Suitable for Bottom Entry:

1. Integrated Bearing Assembly:
   • Bottom-entry shafts are vertically mounted and often overhung, which can cause radial and axial shaft movement.
   • The integrated bearing in the ES925 / ES930 stabilizes the shaft and ensures concentric seal face alignment, which is critical in bottom-entry setups.
2. Lubricating Cooling Housing:
   • Bottom-entry seals are prone to dry running due to fluid gravity not always reaching the seal faces.
   • A built-in cooling and lubrication jacket ensures continuous face lubrication, preventing overheating and excessive wear.
3. Cartridge Construction:
   • Simplifies installation in tight or vertical bottom-entry spaces where component seals are difficult to align correctly.
   • Ensures pre-set compression and minimal installation error, which is important in difficult-to-access bottom-entry seal housings.
4. Glass-Lined Reactor Compatibility:
   • Many bottom-entry applications are used in glass-lined reactors for corrosive or pharmaceutical processes.
   • The ES925 / ES930 is designed to interface safely with these sensitive surfaces using non-reactive, chemically compatible materials.

Service Overview:

Parameter	Specification
Seal Type	Single-pressurised with an integrated bearing
Configuration	Balanced and unbalanced options
Installation	Top, side, and bottom entry capable
Lubrication	Integrated cooling and lubrication housing
Construction	Cartridge-type, pre-assembled
Bearing Support	Integrated bearing assembly included
Special Features	Glass-lined reactor compatibility
API Classification	API 682 Category 1 (single seal)

Technical Specifications:

Parameter	Range	Notes
Shaft Diameter	20.0 – 300.0 mm (0.750″ – 12.000″)	Standard sizes available
Pressure Range	Vacuum to 12 bars (174 PSI)	Material- and temperature-dependent
Temperature	-20°C to +150°C (-4°F to +302°F)	Elastomer dependent
Speed Limit	150 RPM maximum	Application and material dependent
Seal Arrangement	API 682 Category 1	Single seal with bearing support

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	SS 304, Duplex, Hastelloy C, Alloy 20
Springs	SS 316	Hastelloy C, Inconel
Bearing Housing	MS Quoted	SS 316 construction
Wetted Parts	Metallic construction	Non-metallic options available

 

Applications:

Primary Industries:

• Polymerization Processing
• Paint, Coatings & Adhesives
• Pulp & Paper Manufacturing
• Food & Beverage Processing
• Speciality Chemical Handling
• Solvent and Polymer Processing
• Pharmaceutical & Biotechnology
• Chemical & Petrochemical Processing

Equipment Types:

• High-Shaft Load Mixers
• Top, Side & Bottom Entry Agitators
• Glass-Lined Reactors (Pharmaceutical/Chemical)
• Reactor Vessels with Bearing Support Requirements
• Process Equipment with Thermal Management Needs

Why Suitable for Bottom Entry Applications?

Integrated Bearing Assembly:

• Critical for maintaining sealing performance in bottom-entry configurations
• An integrated bearing stabilizes shaft and ensures concentric seal face alignment
• Bottom-entry shafts are vertically mounted and often overhung, causing radial and axial movement

Lubricating Cooling Housing:

• Bottom-entry seals are prone to dry running due to gravity effects
• Built-in cooling and lubrication ensure continuous face lubrication
• Prevents overheating and excessive wear in challenging orientations

Glass-Lined Reactor Compatibility:

• Safe interface with sensitive glass-lined surfaces
• Designed with non-reactive, chemically compatible materials
• Many bottom-entry applications use glass-lined reactors for corrosive processes

Operating Limits & Safety Notes:

Bottom Entry Considerations:

• Easy access required for periodic inspection or replacement
• Orientation-specific installation with correct alignment tools
• Proper system monitoring and support components required
• Plan 32 (flush) or Plan 53A/B (barrier system) may be recommended

General Operating Requirements:

• Installation per manufacturer’s procedures mandatory
• Monitoring systems recommended for critical or regulated services
• Operating limits vary based on selected materials and process conditions
• Compliance with applicable safety and environmental regulations required

Important Safety Warning:

This single seal configuration is NOT recommended for hazardous, toxic, volatile, or regulated chemical services. For such applications, dual pressurized seals (API 682 Arrangement 2) or dual unpressurized seals (API 682 Arrangement 3) are required for environmental protection and regulatory compliance.