In CNG cylinder hydro testing, the dryer plays a quiet but very important safety and quality role. Here’s what it actually does, in practical terms:
Main functions of a dryer in CNG cylinder hydro testing
1. Removes moisture after hydro testing
Hydro testing uses water at high pressure to check cylinder strength and leaks. After the test, water remains inside the cylinder.
➡️ The dryer completely removes this residual moisture.
2. Prevents internal corrosion
Any water left inside a CNG cylinder can cause:
Rusting
Pitting
Reduced cylinder life
➡️ Drying ensures the inside stays corrosion-free.
3. Ensures compliance with safety standards
Regulatory codes (ISO, BIS, ECE, etc.) specify maximum allowable moisture content inside CNG cylinders.
➡️ The dryer helps meet these mandatory dryness limits.
4. Protects CNG gas quality
Moisture inside the cylinder can later:
Contaminate CNG gas
Cause freezing in valves and regulators
➡️ Drying keeps the cylinder gas-ready and clean.
5. Prevents pressure and testing err

• High pressure capacity
• Heavy-duty industrial design
• Reliable & accurate testing
• Custom-built solutions available

Enquiry Now