Mortar couplings

Plastering couplings are couplings that are used in installations that transport mortar, as well as concrete or screed mix. In addition, they are suitable for spraying equipment, plastering units, concrete pumps, mixers and other similar use cases. Structurally, the plastering couplings resemble CAMLOCK couplings. They have a socket with two levers (sometimes one) and a plug with a circular locking groove. However, the two coupling types are not compatible with each other, so they cannot be used interchangeably. In addition, it should be noted that plastering couplings come in two systems: "22" mm and "23.5" mm. These indicate the distance of the centre of the groove on the plug from the face of the plug. The separate systems should also not be combined with each other.

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MORTAR COUPLING FEMALE HOSETAIL FOR SAFETY CLAMPS MST 23.5 INPART24

MORTAR FEMALE PART COUPLING MST WITH TW HOSETAIL SYS. 23,5 FOR SAFETY CLAMPS - ZINC PLATED CAST IRON

Material

zinc plated cast iron

Work pressure

50 bar

Standard

23,5

Sealing ring

NBR

MATERIAL: ZINC PLATED CAST IRON | STANDARD: 23,5 | HOSETAIL FOR SAFETY CLAMPS OR HYDRAULIC CRIMPING

Available

from 158.98zł
vat excluded

MORTAR FEMALE COUPLING MST 23.5 WITH HOSETAIL FOR CLAMPS INPART24

MORTAR FEMALE PART COUPLING MST WITH HOSETAIL SYS. 23,5 - ZINC PLATED CAST IRON

Material

zinc plated cast iron

Work pressure

50 bar

Standard

23,5

Sealing ring

NBR

MATERIAL: ZINC PLATED CAST IRON | STANDARD: 23,5 | HOSETAIL FOR HOSE CLAMPS ASSEMBLY

Available

Ask about price

MORTAR COUPLING MALE VST 22 HOSETAIL FOR SAFETY CLAMPS IRON CAST INPART24

MORTAR MALE PART COUPLING VST WITH TW HOSETAIL SYS. 22 - ZINC PLATED CAST IRON

Material

zinc plated cast iron

Work pressure

50 bar

Standard

22

MATERIAL: ZINC PLATED CAST IRON | STANDARD: 22 | HOSETAIL FOR SAFETY CLAMPS OR HYDRAULIC CRIMPING

Available

Ask about price

MORTAR COUPLING MALE VST 22 WITH HOSETAIL FOR CLAMP ASSEMBLY IRON CAST INPART24

MORTAR MALE PART COUPLING VST WITH HOSETAIL SYS. 22 - ZINC PLATED CAST IRON

Material

zinc plated cast iron

Work pressure

50 bar

Standard

22

MATERIAL: ZINC PLATED CAST IRON | STANDARD: 22 | HOSETAIL FOR HOSE CLAMPS ASSEMBLY

Available

Ask about price

MORTAR COUPLING MALE VST 23.5 WITH HOSETAIL FOR SAFETY CLAMPS IRON CAST INPART24

MORTAR MALE PART COUPLING VST WITH TW HOSETAIL SYS. 23,5 - ZINC PLATED CAST IRON

Material

zinc plated cast iron

Work pressure

50 bar

Standard

23,5

MATERIAL: ZINC PLATED CAST IRON | STANDARD: 23,5 | HOSETAIL FOR SAFETY CLAMPS OR HYDRAULIC CRIMPING

Available

from 78.77zł
vat excluded

MORTAR COUPLING MIG 22 WITH FEMALE THREAD IRON CAST INPART24

MORTAR FEMALE PART COUPLING MIG WITH INTERNAL THREAD SYS. 22 - ZINC PLATED CAST IRON

Material

zinc plated cast iron

Work pressure

50 bar

Standard

22

Sealing ring

NBR

MATERIAL: ZINC PLATED CAST IRON | STANDARD: 22 | INNER THREAD

Available

Ask about price

MORTAR COUPLING FEMALE PART MIG 23.5 WITH FEMALE THREAD ZINC PLATED INPART24

MORTAR FEMALE PART COUPLING MIG WITH INTERNAL THREAD SYS. 23,5 - ZINC PLATED CAST IRON

Material

zinc plated cast iron

Work pressure

50 bar

Standard

23,5

Sealing ring

NBR

MATERIAL: ZINC PLATED CAST IRON | STANDARD: 23,5 | INNER THREAD

Available

from 135.10zł
vat excluded

MORTAR COUPLING MST 22 FEMALE PART WITH HOSETAIL FOR CLAMPS ASSEMBLY IRON CAST INPART24

MORTAR FEMALE PART COUPLING MST WITH HOSETAIL SYS. 22 - ZINC PLATED CAST IRON

Material

zinc plated cast iron

Work pressure

50 bar

Standard

22

Sealing ring

NBR

MATERIAL: ZINC PLATED CAST IRON | STANDARD: 22 | HOSETAIL FOR HOSE CLAMPS ASSEMBLY

Available

Ask about price

MORTAR COUPLING MST 22 FEMALE PART WITH HOSETAIL FOR SAFETY CLAMPS IRON CAST INPART24

MORTAR FEMALE PART COUPLING MST WITH TW HOSETAIL SYS. 22 - ZINC PLATED CAST IRON

Material

zinc plated cast iron

Work pressure

50 bar

Standard

22

Sealing ring

NBR

MATERIAL: ZINC PLATED CAST IRON | STANDARD: 22 | HOSETAIL FOR SAFETY CLAMPS OR HYDRAULIC CRIMPING

Available

from 133.83zł
vat excluded

MORTAR COUPLING VIG 22 WITH FEMALE THREAD IRON CAST INPART24

MORTAR MALE PART COUPLING VIG WITH INTERNAL THREAD SYS. 22 - ZINC PLATED CAST IRON

Material

zinc plated cast iron

Work pressure

50 bar

Standard

22

MATERIAL: ZINC PLATED CAST IRON | STANDARD: 22 | INNER THREAD

Available

Ask about price

MORTAR COUPLING SEALING RING NBR INPART24

MORTAR SEALING RING - NBR

Material

NBR

MATERIAL: NBR

Available

from 4.16zł
vat excluded

Mortar couplings - Plastering couplings

How are plastering couplings constructed?

Plastering couplings are constructed similarly to CAMLOCK couplings, as they consist of:

  • a socket with clamping levers, 
  • a plug with circular locking groove, 
  • a seal.

As far as the ends of the plug and socket are concerned, they can be either in the form of a spigot for hose clamping or a collet, or in the form of an internal/external thread.

Galvanised cast iron and steel are the most common materials for the manufacture of this type of coupling. The seal, on the other hand, is usually formed from NBR rubber.

What is a plastering coupling system?

Plastering coupling system refers to the distance from the plug groove centre to the plug front and has nothing to do with the size of the product.

There are two systems of plastering couplings:

  • 22 (mm); 
  • 23.5 (mm).

These are used by different machine manufacturers. Therefore, before buying couplings, make sure which system they should be made in.

Very important, because the systems are not compatible and should not be combined with each other.

What are the key parameters of a plastering coupling?

The key parameters of a plastering couplings are:

  • the inner diameter of the plastering hose (in the case of a spigot connector); 
  • the thread size (in the case of a threaded coupling);
  • the diameter of the socket/plug; 
  • aforementioned system (22 or 23.5).

Another key parameter is the permissible operating pressure. Most plastering couplings have a strength of up to 50 bar, but there are also plastic products for which the permissible pressure is 25 bar.

The operating temperature range is also worth mentioning. This depends primarily on the seal used. In the case of the most popular material, which is NBR rubber, the couplings will be able to operate at temperatures from -20 degrees Celsius to 100 degrees Celsius.

How to install a plastering coupling?

To install a plastering coupling, insert the spigot of the plug/socket into the hose and fasten it with strong ties, bands or collets.  Make sure the whole thing is solid, as at a high pressure of 50 bar there is a risk of unsealing or (worse) tearing out the hose end.

With threaded couplings, the situation is somewhat simpler, as all you need to do is screw the thread firmly onto the installation.

How to connect a plastering couplings together?

To connect the plastering coupling, you don't need any tools. Only two movements are required:

  • first insert the plug into the socket; 
  • then tighten the levers of the socket so that the connection becomes airtight.

You can also clamp the levers together to protect the installation from accidental disconnection.

FAQ

Are a plastering coupling and a CAMLOCK coupling the same thing?

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No, a plastering coupling and a CAMLOCK coupling are not the same thing. Both products have a very similar construction and design, but are not compatible with each other. They cannot be used interchangeably.

What to consider when choosing a plastering couplings?

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When choosing a plastering coupling, there are several considerations to pay attention to. The most important one is the coupling system (22 or 23.5), as different systems are not compatible with each other. In addition, make sure that the size of the product fits your installation and choose the right end (hose spigot or thread).

What applications does the plastering couplings have?

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The plastering coupling has many applications, such as the supply of mortar, concrete mix or screed mix. Therefore, it is used in plaster spraying equipment, plastering machines and pumps, mixers, concrete conveying systems and other similar use cases.