Din 11851 fittings

How is DIN 11851 fitting constructed?

Regarding the construction, the DIN 11851 fitting consists of four components:

• female part, 
• male part, 
• nut, 
• seal (DIN 11851 seals are usually made of NBR rubber, but EPDM, FKM and silicone versions are also available).

All components of the connector (except the seal) are made of stainless steel. The DIN 11851 standard gives you the guarantee that you will receive a product made with precision. Furthermore, one that meets the requirements of many standards when it comes to transporting foodstuffs and hazardous materials or pharmacological substances.

What are the different types of DIN 11851 fittings?

It is worth noting that we distinguish between DIN 11851 fittings in terms of how they are assembled. They are divided into two basic types:

• with hosetail (i.e. for a collet or hose clamp), 
• weld-on.

What are the dimensions and parameters of DIN 11851 fittings?

When it comes to DIN 11851 food grade fittings, the dimensions available on the market offer a truly wide range of possibilities. You have a range of diameters from DN10 to DN150.

In addition to this, the maximum working pressure is an equally important parameter when choosing fittings. In this case, it depends on the diameter. According to consensus, we assume the following division:

• fitting DIN 11851 DN15 to DN40 - 40 bar; 
• fitting DIN 11851 DN50 to DN100 - 25 bar; 
• fitting DIN 11851 DN125 to DN150 - 16 bar.

But remember that you should also consider the maximum working pressure of the hose and pipes in the installation.

Finally, it is still worth paying attention to the permissible temperature range. Well, in this case it all depends on the material from which the seal is made. Standard NBR rubber can withstand temperatures from -20 degrees Celsius to 70 degrees Celsius for hot water and even 164 degrees Celsius for steam.

How to connect DIN 11851 fittings together?

Joining DIN 11851 fittings together will not cause you any problems, as their construction is very simple. Just follow the steps below:

1. Make sure that the DIN 11851 nut is on the female part of the fitting. 
2. Insert the seal into the correct place on the male part of the fitting. 
3. Join the male and female parts together. 
4. Tighten the nut firmly and make sure the unit is tight.

Remember that, depending on the type of fitting (weld-on or with hose stub), installation will differ slightly.

With a hose stub and clamping ring, you are unlikely to encounter any major problems. However, when welding, take care to use the right technique so that the quality of the weld is high. Only then will the joint meet hygiene standards.

There must be no crevices or slots where the medium can settle anywhere.