G Series Gas Compressors
An inert purge gas, like nitrogen, may be purged through the packing case. If the purge gas is at a pressure above the suction pressure of the process gas, leakage of the purge gas into the process may occur. In some cases this is acceptable and a higher pressure purge is an excellent control option.
If, however, the purge gas is at equal or lower pressure than the suction pressure of the process gas, the process gas may leak into the purge gas. This purge gas must then be vented, flared or safely dealt with in a similar way.
More gas packing sets significantly reduce gas loss and the chance of gas leaking into the local atmosphere.