Information Required for Mechanical Seal Selection

o select a suitable mechanical seal, the following technical information should be provided. Accurate operating data helps ensure proper seal performance, reliability, and service life.

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1. Equipment Information

1.1 Equipment Type

Please specify the equipment where the mechanical seal will be installed:

* Centrifugal pump
* Mixer / agitator
* Reactor vessel
* Compressor
* Rotary equipment
* Other special equipment

Example:
Equipment: Chemical centrifugal pump

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1.2 Manufacturer and Model Number

Provide:

* Equipment manufacturer
* Pump / agitator model
* Existing mechanical seal model (if available)

Example:
Pump Model: XYZ-100-50-200
Existing Seal: 59U / M7N

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1.3 Seal Installation Location

Please indicate:

* Pump side seal
* Motor side seal
* Agitator top entry seal
* Bottom entry seal
* Side entry seal

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2. Operating Conditions

2.1 Medium / Process Fluid

Please provide:

* Fluid name
* Chemical composition
* Concentration percentage
* Presence of solids or particles

Example:

Medium:

* Sulfuric acid 50%
* Polyurethane resin
* Diesel fuel containing FAME
* Wastewater with particles

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2.2 Operating Temperature

Provide:

* Normal operating temperature
* Maximum temperature
* Minimum temperature

Example:

Operating temperature: 120°C
Maximum temperature: 150°C

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2.3 Operating Pressure

Provide:

* Normal operating pressure
* Maximum design pressure
* Vacuum condition (if applicable)

Example:

Operating pressure: 8 bar
Maximum pressure: 12 bar
Vacuum: -0.8 bar

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2.4 Rotation Speed

Provide shaft speed:

* RPM (revolutions per minute)

Example:

Speed: 1450 RPM

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3. Mechanical Dimensions

3.1 Shaft Diameter

The most important dimension:

* Shaft diameter (d)
* Sleeve diameter (if applicable)

Example:

Shaft diameter: 50 mm

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3.2 Seal Chamber Dimensions

Provide:

* Seal chamber diameter
* Seal chamber depth
* Installation length
* Stuffing box dimensions

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3.3 Shaft Details

Provide:

* Shaft material
* Shaft tolerance
* Shaft runout
* Surface finish

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4. Seal Design Requirements

4.1 Seal Type

Please specify:

Single Mechanical Seal

Used for:

* Clean fluids
* Low leakage requirements

Double Mechanical Seal

Used for:

* Toxic media
* Flammable fluids
* High-temperature applications
* Vacuum applications

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4.2 Seal Arrangement

Provide:

* Internal seal
* External seal
* Back-to-back arrangement
* Tandem arrangement

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4.3 Cartridge or Component Seal

Please specify:

* Cartridge mechanical seal
* Component mechanical seal

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5. Material Selection

5.1 Seal Face Material

Common combinations:

Carbon / Silicon Carbide (C/SiC)

Applications:

* Water
* General chemical service

Silicon Carbide / Silicon Carbide (SiC/SiC)

Applications:

* Abrasive media
* Corrosive chemicals
* High temperature

Tungsten Carbide / Carbon (WC/C)

Applications:

* High pressure
* Heavy-duty applications

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5.2 Secondary Seal Material

Provide elastomer requirement:

* NBR
* EPDM
* FKM (Viton)
* FFKM
* PTFE

Consider:

* Chemical compatibility
* Temperature resistance

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5.3 Metal Parts Material

Common materials:

* SS304
* SS316
* Hastelloy
* Titanium

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6. Operating Environment

Provide information about:

6.1 Installation Environment

* Indoor / outdoor
* Humidity
* Dust
* Corrosive atmosphere

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6.2 Special Requirements

Examples:

* Food grade requirement
* FDA approval
* ATEX requirement
* API 682 compliance
* Emission control requirement

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7. Flush and Support System

Please provide:

Single Seal:

* Flush plan
* Cooling requirement
* External flushing

Double Seal:

* Barrier fluid type
* Barrier pressure
* Reservoir system
* Circulation system

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8. Application History

If replacing an existing seal, provide:

* Previous seal model
* Failure reason
* Leakage problem
* Operating hours
* Photos of damaged seal

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9. Photos and Drawings Required

Please provide:

✓ Equipment drawing
✓ Seal installation drawing
✓ Existing seal photo
✓ Shaft photo
✓ Seal chamber photo
✓ Nameplate photo

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Mechanical Seal Selection Data Sheet (Customer Information)

Equipment:
Manufacturer:
Model Number:

Medium:
Concentration:

Temperature:
Normal: ___ °C
Maximum: ___ °C

Pressure:
Normal: ___ bar
Maximum: ___ bar
Vacuum: ___ bar

Speed: ___ RPM

Shaft Diameter: ___ mm

Seal Type:
□ Single Seal
□ Double Seal
□ Cartridge Seal

Seal Face Material:
O-ring Material:
Metal Material:

Flush System:

Special Requirements: