​​​​​​Spiral Wound Gasket for Plate Heat Exchanger: Application Requirements and Material Selection

In modern industrial systems, Plate Heat Exchangers are widely used in HVAC, oil & gas, chemical processing, food production, and energy industries. To ensure safe and efficient operation, selecting the right Spiral Wound Gasket is extremely important.

If the sealing gasket is not suitable, the system may suffer from leakage, reduced heat transfer efficiency, and equipment damage.

At PM-E.vn, we supply high-quality Spiral Wound Gaskets designed for demanding temperature, pressure, and chemical environments.

What is a Spiral Wound Gasket?

A Spiral Wound Gasket is a semi-metallic sealing gasket made from:

• Continuous wound metal strips
• Soft filler materials such as Graphite, PTFE, or Mica
• Optional inner ring / outer ring reinforcement

This structure provides both flexibility and excellent resistance to high pressure and temperature.

Working Principle

When compressed between two flanges:

• The soft filler material fills microscopic surface irregularities
• The metal winding provides strength and resilience
• Even under changing pressure and temperature, the gasket maintains sealing integrity

This makes Spiral Wound Gaskets ideal for continuous industrial service.

Advantages of Spiral Wound Gaskets

1. High Pressure Resistance

Suitable for steam, hot oil, compressed air, and pressurized liquids.

2. Wide Temperature Range

Can operate from -200°C to +1000°C depending on material selection.

3. Self-Energizing Seal

Higher pressure can improve sealing performance.

4. Compensates Surface Imperfections

Provides effective sealing even on less-than-perfect flange surfaces.

5. Long Service Life

Reduces downtime and maintenance cost.

Why Plate Heat Exchangers Need High Quality Gaskets

Plate Heat Exchangers often operate under:

• High differential pressure
• Constant temperature cycling
• Steam / hot oil service
• Corrosive acids and alkalis
• Continuous vibration

Using the wrong gasket may cause:

• Leakage
• Cross contamination of fluids
• Lower heat transfer efficiency
• Unexpected shutdowns

How to Select Spiral Wound Gasket Materials

1. Metallic Materials

Stainless Steel 304

• Good corrosion resistance
• Cost effective
• Common for water, steam, HVAC systems

Stainless Steel 316L

• Better chemical resistance than 304
• Suitable for food, pharmaceutical, chemical service

Inconel

• Excellent for very high temperatures
• Ideal for steam and boiler systems

Titanium

• Outstanding corrosion resistance
• Suitable for seawater and aggressive chemicals

2. Filler Materials

Graphite

• Excellent high temperature resistance
• Best for steam and hot oil

PTFE

• Superior chemical resistance
• Ideal for acid and alkali service

Mica

• Good fire resistance and thermal insulation

Quick Material Selection Table

Proper Installation Guide

Before Installation

• Clean flange faces thoroughly
• Remove rust, oil, and debris
• Check flange flatness
• Select correct gasket size

During Installation

• Center gasket correctly
• Tighten bolts in star pattern
• Apply torque evenly
• Avoid uneven compression

After Installation

• Perform pressure testing
• Check for leakage
• Reinspect after 24 hours of operation

Maintenance and Replacement

Regular inspection is recommended for:

• Edge leakage
• Hardened filler material
• Cracks or deformation
• Chemical corrosion

Always replace the gasket after flange disassembly. Reusing old gaskets is not recommended.

PM-E.vn Supplies High Quality Spiral Wound Gaskets

PM-E provides:

• Spiral Wound Gaskets to ANSI / JIS / DIN standards
• SS304 / SS316 / SS316L gaskets
• PTFE / Graphite / Mica fillers
• Custom manufacturing to drawing
• Sizes from DN15 to DN3000
• Imported industrial quality products

Conclusion

Spiral Wound Gaskets are one of the best sealing solutions for Plate Heat Exchangers thanks to their superior pressure resistance, temperature resistance, and leak prevention performance.

Choosing the correct metal and filler materials ensures longer equipment life, better safety, and lower maintenance costs.

For professional gasket consultation, contact PM-E.vn today.

FAQ

How long does a Spiral Wound Gasket last?

Typically 1–5 years depending on service conditions.

Can it be reused?

Not recommended. Replace after every flange opening.

Which gasket is best for chemicals?

PTFE filler with SS316L or Titanium.

Which gasket is best for steam?

Graphite filler with SS304 or SS316.