DIY stainless steel thermos valve repair

In detail: do-it-yourself repair of a stainless steel thermos valve from a real master for the site my.housecope.com.

The principle of the thermos lid is very simple. You press a button, the valve opens and the contents of the inclined thermos are poured through the opening into another container. The push-button is returned to its place by means of an internal valve spring.

Some manufacturers complicate thermos button deviceby adding small details to the design that allow the button to work more softly, to ensure a better tightness of the lid. But the more parts there are in the assembly, the higher the likelihood of failure of any little thing, which will affect the operation of the valve as a whole.

The lid valve also has a number of disadvantages, which are caused by possible clogging of the overflow, accumulation of deposits and, accordingly, the appearance of unpleasant odors.

Thermos users get out of the situation in different ways. Someone at a chosen frequency cleans the lid of a thermos with a button, soaking the device in a solution of baking soda, others load the lid into the dishwasher, and others completely disassemble the structure and mechanically clean each component part.

All bonnet valve parts are made of food grade plastic. On the one hand, you get a guarantee that no harmful substances will get into the liquid, but on the other hand, the strength of the plastic is low, the valve mechanism and the button wear out quickly.

In case of damage that is not associated with deformation of the valve and it is only necessary to restore the connection of the structure or install the dropped part in place, the repair can be done by hand. Therefore, if the button in the thermos has broken, do not rush to buy a new one, but try to disassemble the cover using our advice.

Video (click to play).

Consider three options for a cover with a button. The first design is the simplest, with a minimum of details and everything is intuitive.

Here, the repair of the thermos button will consist in the usual disassembly and cleaning of the valve from deposits:

  1. We unscrew the pressure ring counterclockwise. We apply enough force, but without the use of locksmith tools. The ring is rather fragile and if there are signs of sticking of the part, then soak the lid in hot water for a couple of minutes.
  2. We take out the valve from the body.
  3. We push out the valve mechanism to do further disassembly.
  4. We get three large fragments of the mechanism, it remains to get to the spring, button and other auxiliary parts.
  5. We increase the set of parts during further disassembly of the button itself (usually it is fixed with fasteners).
  6. Carefully push out the valve stem so as not to damage the retaining ring, we still need it for the further assembly of the cover.

Image - DIY stainless steel thermos valve repair

Image - DIY stainless steel thermos valve repair

Image - DIY stainless steel thermos valve repair

And here we have in front of us all the details that should be washed from deposits. As we can see, there is practically nothing to break here, only if the spring or retaining ring does not burst from wear. These replacement parts can be picked from other machines or purchased from a hardware store.

VIDEO INSTRUCTION

The next version of the cover is complicated by the presence of a second button, but even here the manufacturers have provided for the possibility of disassembly. Rather, they did not begin to seal the mechanism, as is the case when the marketing specialists of companies want to sell as many products as possible.

  1. In this case, pry off the cover with a thin metal blade or other object.
  2. The device has hidden latches that can be damaged if you manipulate it too sharply. Be careful.
  3. As soon as you remove the cover, all parts will be freely available. To make reassembly easy, we advise you to take a photo of the assembled parts.

Image - DIY stainless steel thermos valve repair

Image - DIY stainless steel thermos valve repair

And that's why it was necessary to clean the valve. These are deposits that have accumulated over a year of operation of the thermos. Follow these simple rules, and your health will be completely safe, and the thermos will last for many years.

Faced a similar problem.

I asked my spouse to sew a cover.

The inside of the cover is made of flannel fabric.

Outside - from black leatherette.

Between these “shells” I placed a “insulation” made of cut-to-size parts of an old gymnastic rug.

The upper edging of the cover is made of denim, inside which a cord is threaded to tighten the cover.

I have been using it on winter fishing for over 10 years.

It keeps the temperature perfectly and does not rattle in the backpack.

Protects the thermos body from damage.

Drill at least two holes with a diameter of 3 - 5 mm in the outer part of the thermos body and blow out the polyurethane foam into them. The foam will fill the voids and since it is a good heat insulator it will retain heat well.

There are several options to repair an all-metal Chinese thermos:

First, by opening the lower cover of the upper shell, get to the nipple and restore the vacuum by pumping out air with a powerful compressor. I will say right away that not every household compressor can do this, then it will be necessary to flatten and seal the nipple in order to maintain the vacuum in the inner flask of the thermos. This is the most efficient repair method.

The second way is to open the bottom cover of the case, cut out the bottom and, having selected the required size for a thermos flask, simply insert it inside the non-working one. Then fix it there with polyurethane foam and close the housing cover. This option is also quite effective and a thermos with a new flask will still serve.

The third and most ineffective way is, by opening the housing cover, remove the nipple and through the resulting hole fill the entire space between the walls of the housing with something insulating, such as rubbed foam or cork. But after such a repair, it will be possible to store only cool drinks or water in it, but hot tea will cool down very quickly, so the thermos will almost completely lose its properties.

In general, there are several repair options - choose, in any case, you do not need to throw out a stainless steel thermos, its parts can be used in everyday life, since food stainless steel is a high-quality and expensive material, from which it will be possible to make all sorts of almost eternal containers (cups, mortars, flasks , vases, ashtrays, etc.).

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  • Image - DIY stainless steel thermos valve repair
  • Image - DIY stainless steel thermos valve repair
  • Image - DIY stainless steel thermos valve repair

Image - DIY stainless steel thermos valve repair