Seismic pressure oil why white table?

Seismic pressure gauge, also called oil filled pressure gauge. Mainly used in the environment of strong vibration measurement of pressure. We sometimes found in the case of oil will be white, this is how to return a responsibility? We made a summary, the causes of seismic oil pressure table white mainly has three possibilities. 1. Manufacturers use glycerin is too cheap, impurity is in the oil; 2. The oil filled pressure gauge (inner core The spring tube and copper head) After welding cleaning process does not reach the designated position, pressure gauge of the copper pipe and copper base after high temperature after heating stalwart, produce a large number of oxide and the residual flux on the surface. If not clean, after the oil filled pressure gauge in a short period of time will be pale. 3. Oil filled pressure gauge using occasions of high temperature influence, undermining the oil internal composition, causing the oil change physical properties, and metamorphic pale. To seismic oil filled pressure gauge, pressure gauge can be components within the lubrication effect, prolonging the service life of the instrument.