China's boiler parts factory to share the correct installation method of manhole

China's boiler parts factory to share the correct installation method of manhole

         1, the method to prevent asbestos pad bonding: 

(1), the ancient method is to apply a layer of lead powder or silver powder on the asbestos pad before installation, these things seem to be difficult to get; 

(2), can also be used in asbestos gasket Wrap a layer of raw material tape, this method is simple, practical, economical and convenient; 

(3), the current "furnace metal gasket" sold by the boiler parts store, but the price is relatively high, because the gasket is suitable for high temperature and high pressure boiler Up.

         2. If you use the above method to install the hand hole pad, you will not need to clean it up later. Don't say thank you! As for how to clean the asbestos pad that has been bonded to the inner hole of the header, no good method has been found yet. Generally, special tools are used to make the anti-hook toughness with the alloy "front steel saw blade" (cutting saw blade for machine tools). Tools, shaped like L, you might as well try to make one to prevent it from happening.

         3, this kind of gasket can be bought in the professional store, if you can't buy it, you can't solve it by the way you said, but I don't have much to say. You can make it yourself with a fine asbestos (3mm thick) of good quality (toughness). Because it is oval, it is difficult to make. In fact, it is also possible to make a perfect circle, but pay attention to the method. First, cut the inner ring first, and finally cut the outer ring. The boiler fitting is to prevent damage.

         4. Questions about indentation. This phenomenon also occurs, there are several possibilities, one is the deformation of the hand hole cover (or head). The second is the deformation of the bolts on the seat or the seat. The third is the installation offset. The fourth is the gasket offset. The fifth is that there are residual gaskets on the sealing surface.

        5, finally teach you a unique, but you must first call me a "master" O (∩ _ ∩) O haha ~! There is a term in the fastening installation called “pre-tightening force”, and the explanation of the boiler fitting is “the force to eliminate the gap”. When we put the shimmed hand hole cover correctly into the sump hole, tighten it a little, that is, apply the pre-tightening force, then use the wrench or the hammer to hit the fastening bolt up and down a few times, then you will do it again. Fasten, remember, do not apply full force at this time, then repeat the tapping action, repeat this several times three times, and finally tighten the force. This works well.