News | MONOVATE Co., Ltd.

Why Stainless-Steel Containers getting rusted? How to avoid it?-Part 1

Posted on 8月 17, 2019 by nitto-kinzokukogyo

Recently we received some inquiries like “Even though it was made of stainless steel, it soon got rusted” from our customers.

Stainless steel is a very rust-resistant alloy of iron.

Indeed, compared to iron, it is quite hard to rust, but it doesn't mean it doesn't rust at all.

Why is stainless steel so resistant to rust?

When exposed to air, it will form a self-healing barrier!

When exposed to air, it will form a self-healing barrier!In stainless steel, chromium bonds with oxygen in the air (=oxidation) before iron, which causes rust, and forms a very thin passive film (protective coating) of a few nanometers.

The passive film is resistant to chemical change and it is so strong that can prevent iron from oxidation(=rust).

Passive coating can be damaged and torn, but it can self-heal in a moment, so it does not leave room for iron to rust.

When shall it be replaced? Replacement Guidelines for Packing/Gasket for Stainless- steel Containers – Part2

Posted on 8月 1, 2019 by nitto-kinzokukogyo

You even can just buy one packing and one part

Consumables such as packing, lid, and lever band that come with your container can be purchased separately.
You can quote the price to the supplier or contact us via the inquiry form.
If you do not know the type of container or packing, please contact us with the following information.

Introduction of consumables and optional parts

For closed container with catch clip [CTH] [CTB]

The catch-clip type sealed container is made by all stainless steel, which can be easily sealed with a catch clip attached to the body.

Type A silicone packing [PQA]

Clip type sealed container (Example: CTH -18 to 47 H/CTB) Standard attached packing.
*There is an option of different materials.
*Its color is black.
*FKM (fluorinated rubber) Model: [PFA]
*EPDM (ethylene propylene rubber) Model: [PEA]
*NBR (nitrile rubber) Type: [PNA]
*CR (chloroprene rubber) model: [PCA]

When shall it be replaced? Replacement Guidelines for Packing/Gasket for Stainless- steel Containers – Part1

Posted on 7月 11, 2019 by nitto-kinzokukogyo

“Packing” and “gasket” are commonly used for sealed stainless steel containers and for connections to piping and peripheral components.

Because they are consumables, it is necessary to change them at the appropriate time. How often do you change the container?

The actual replacement time varies by the frequency of use and the contents, so this time we have summarized the general replacement guidelines for the silicone rubber seals [PQA] [PQB] [PQL] that come with standard airtight containers of our company.

Replacement guidelines for packing and gasket

When degraded

Is the packing worn out, broken or chipped?

If the packing is damaged, it may cause foreign matter to get mixed in, so please replace it with a new one immediately.

In addition to the cause of foreign matter, it can also cause leakage of contents or loss of sealing.