For a long time the packing gland was the standard in plant technology. It still proves its validity today in special applications.
A packing gland must continually exhibit a minimal leakage. This leakage serves to cool and lubricate the packing string. At the optimal setting of the packing gland the is a minimal leakage of 20 to 40 drops per minute. This figure however is heavily dependent on the pressure, the sliding speed, the medium and the temperature.
Often a lantern ring with two connections is fitted in order to dilute and discharge the product leakages. Different materials and combinations are used depending on the application.
