The Reasons Why and Solutions When a Valve Doesn’t Fit Tightly

Author:     Published time:2017-07-31 17:13     Reading times:933    

There are many confusing problems occurred when we use valves, such as the valves doesn’t fit tightly. So, what can we do in this case? Normally, first confirm the valve is closed in place. If yes, the valve still leaks, then check the sealing surface. Grind and test the seal if some valve seals are detachable. If it still cannot be closed tightly, the valves must be returned to the factory for overhaul or replace them to avoid influencing the regulate service or emerging work accidents.


The solutions:


1.The sealing surface is jammed by impurities


When a valve cannot be closed tightly, maybe the sealing surface is jammed by impurities. At this time, open the valve wider instead of closing it by compulsory meas. Repeat the action and it will be solved. Otherwise it should be checked and the purity of medium maintained.


2.The stem thread is rusted

A valve that is opened at most times may not be closed tightly for a rusted stem thread when it is closed occasionally. In this case, you can switch the valve repeatedly and hammer the bottom of the body at the same time. So there is no need to grind and repair the valve and it can be closed tightly.


3.The sealing surface is broken


If it still cannot be closed tightly even if switched many times, the sealing surface must be broken. Then it should be reported for repair in time; when the sealing surface is broken by corrosion or particle scratching in medium, report for repair in time, too.


4.Bad connection between the stem and the disc


To make the switch flexible, you should lubricate the stem and the nut regularly. It is necessary to formulate a standard maintenance program.

Related recommendation:

DIN Carbon Steel Gate Valves Manufacturers

DIN F5 Flange Type Carbon Steel Gate Valve