SMS fittings

The SMS fitting is a hygienic fitting that features a practical and convenient design. This guarantees a smooth and gap-free connection. This guarantees a smooth and gap-free joint. As for the construction itself, it consists of four parts: a round nut, a female part, a seal and a male part. Together, they form a sealed unit that is easy to assemble/disassemble. 

SMS couplings are designed primarily for the food industry and, in particular, the dairy industry. This is because they meet all the necessary standards for working with food. However, they are also used in the cosmetics and chemical industries. In our range, you will find SMS couplings from reputable manufacturers, which translates into their high quality.

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SMS 1145 NUT STAINLESS STEEL AISI 304 INPART24

SMS 1145 NUT - SS 304

Material

SS

Norm

SMS 1145

MATERIAL: AISI 304 | NORM: SMS 1145 | NUT WITH RD FEMALE THREAD

Available

from 43.85zł
vat excluded

SMS 1145 FOOD COUPLING WITH MALE THREAD AND HOSE TAIL STAINLESS STEEL 316 INPART24

SMS 1145 FITTING WITH MALE THREAD x HOSETAIL - SS 316

Material

SS

Norm

SMS 1145

MATERIAL: AISI 316 | NORM: SMS 1145 | HOSE TAIL FOR SAFETY CLAMPS

Available

from 101.27zł
vat excluded

SMS 1145 FOOD COUPLING MALE PART WITH CONE FOR NUT AND HOSE TAIL STAINLESS STEEL INPART24

SMS 1145 MALE COUPLING WITH CONE FOR NUT x HOSETAIL - SS 316

Material

SS

Norm

SMS 1145

MATERIAL: AISI 316 | NORM: SMS 1145 | HOSE TAIL FOR SAFETY CLAMPS

Available

from 91.70zł
vat excluded

SMS 1145 SEALING RING BLUE EPDM INPART24

SMS 1145 SEALING RING - BLUE EPDM

Material

EPDM

Norm

SMS 1145

MATERIAL: EPDM | NORM: SMS 1145 | TEMPERATURE RANGE: -40°C TO +130°C

Ask for availability

from 5.67zł
vat excluded

SMS fittings - SMS couplings

How is SMS fitting constructed?

SMS fitting consists of 4 basic parts:

  • the circular nut (which joins the male and female parts together);
  • seal (usually made of FDA approved NBR rubber, but sometimes also made of materials such as EPDM, PTFE, FTM or silicone);
  • female part; 
  • male adapter (with space for the seal).

Apart from the sealing, all parts of the coupling are almost always created from stainless steel, which is suitable for food contact.

Having written this, it is worth pointing out that SMS couplings come in several versions. Although the principle of operation remains the same, they clearly differ in construction.

What are the different types of SMS fittings?

There are 2 types of SMS fittings on offer from manufacturers:

  • for welding, 
  • under a clamping ring/contracting collet.

The weld-on version has a shortened male and female part and (as the name suggests) is used for welding to the installation. On the other hand, you will usually recognise an SMS coupling under a clamping ring by the fact that the male and female parts end in an elongated, smooth or notched tail.

What are the dimensions and other parameters of SMS coupling?

When it comes to SMS couplings, the dimensions allowed by the standard start from DN25 and reach DN100. This makes the choice so wide that you are sure to find the right diameter for your needs.

One of the most popular sizes is the 63.5 mm SMS coupling (also known as the 60.3 SMS coupling due to the fact that it fits a pipe of this diameter).

It is also worth mentioning the allowable working pressure, which for the connector itself is 15 bar.

The maximum operating temperature, on the other hand, depends on the seal used. PTFE (Teflon) products are the most robust in this respect.

How to connect SMS fittings together?

Connecting the SMS fittings is very simple. Just follow the steps below:

  1. 1. Put the nut on the female part of the coupling. 
  2. Place the seal in its designated place (you will find it in the male part of the coupling). 
  3. Join the male and female parts together and tighten the nut firmly (there is a special SMS coupling spanner for this).

Remember, however, that in the case of weld-on couplings and those under a clamping ring/contracting collet, you still have to connect them to the installation as intended!

How much does SMS coupling cost?

The cost of the SMS coupling depends primarily on its size, type, and the seal used in it. Therefore, it is difficult to indicate a specific price for the product.

Depending on the customer's needs, it will vary.

FAQ

What is an SMS coupling?

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The SMS coupling is a coupling manufactured to a Swedish standard (Swedish Manufacturing Standard). It consists of four components: a nut, a seal, a male part and a female part. In addition, it is available in several versions — depending on how it will connect to the rest of the installation.

What is the SMS coupling used for?

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The SMS coupling is used for connecting installations in the food industry (mainly dairy). However, it is also suitable for the cosmetic and chemical industries. It is easy to use, robust and does not contaminate the medium to be transmitted.

Which SMS keg connection should I choose?

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A weld-on SMS coupling will suit the keg best. Unless the tank design has installation features that allow other versions of the coupling to be used.