Compressor Dry Gas Seal

[steveb1111]

Hello,

I'm trying to determine the consequences to the DGS system in the event of a compressor blowdown.

If using the compressor gas a source for DGS, is the seal is lost? Further, the potential for low blowdown temperatures may give rise to liquid formation and possible damage to the DGS system.

Since compressor blowdown is not an uncommon pactice, am I missing something here.

Steve

 

[flexibox]

Clean gas should be supplied to the seals at all times to prevent dirty gas contaminating the seals. The Gas panel should be designed to prevent liquid formation and a positive flow of process gas across the seals by means of installing appropriate Filters, Heaters and Gas Boosters. The booster will automatically kick in when there is insufficient delta P or low velocity across the internal Compressor Laby. The heater will ensure that the gas is heated approx 20C above it's Dew point.

1 check your panel design
2 check your filter element size
3 if you do not have boosters then you may use N2 bottles

If you are experiencing seal failures due to liquids get a gas composition and ask your seal vendor to do an analysis and review your panel design. Process conditions may have changed.

trust this helps!