What is the standard for valve stem oiling?
Often open, high temperature valve suitable for intervals of one week to one month refueling; not often open, the valve is not high temperature, refueling cycle may be longer.
Some parts of special cup with oil or grease, if damaged or lost in the operation, should be installed for repair, oil to dredge. Lubrication parts shall be regularly lubricated according to specific conditions.
Valve trapezoidal thread, the stem nut and the bracket sliding parts, gear parts part of bearing, gear and worm gear, worm and other sites with activities, are in need of better lubrication and reduce friction between each other, to avoid wear and tear each other.
