What are the factors lead to oil filled pressure gauge leak?

Oil filled pressure gauge, also called seismic pressure gauge. Refers to the internal injection pressure gauge shell oil, because the oil cushion can have obvious impact on the earthquake, so that it can reduce volatility, external vibration for pressure measurement, the effects of reading. Through to the oil filled in the table, also parts of the machine lubrication effect, extend the service life of the instrument at the same time. At the same time, we don't want to see the best of oil spill is happen. So how to make oil filled pressure gauge does not leak? The principle of oil filled pressure gauge is mainly case inside filling the aseismic silicone oil or glycerine, in general, lead to oil filled pressure gauge leak factor mainly has the following three aspects: 1. Base is the thread seal between hex and pan was not well done, there might be a virtual welding welding or not sealing gasket. 2. Cover gasket between the circle and pan, there is cause gasket askew when fastening cover ring, and did not have the effect of sealing. 3. Fill oil plug at the time of installation are not smooth or not installed in place.