IVAR.IVN412 28-18 mm one-side slip-on reducer, stainless steel AISI 304

Product detailed description

The reduction IVAR.IVN412 28-18 mm made of stainless steel AISI 304 (1.4301) is a press-fit system fitting, which allows a transition from a 28 mm to a 18 mm dimension in one step. The smooth insertion end with a diameter of 28 mm is inserted into the press-fit socket of another fitting of the same size, while the opposite side has a press-fit socket with an EPDM O-ring for a 18 mm pipe. The total length of the reduction is 77 mm.

For which types of systems is it suitable

• closed heating and cooling circuits, solar systems
• technical and operational liquids, industrial applications
• compressed air, vacuum systems, inert and technical gases
• drainage of waste and rainwater

Not suitable for potable water – this is also indicated by a symbol in the fitting designation.

Operating limits

• pressure up to PN 16, vacuum down to -0.8 bar (absolute pressure 0.2 bar)
• operating temperature from -20 °C to +120 °C
• anti-freeze mixture with a maximum concentration of 50 %

Installation and inspection of the press-fit

The 18 mm socket is equipped with an LBP (Leak Before Press) O-ring with a broken profile – an unpressed joint will leak during pressure testing and thus cannot pass inspection. Additionally, an orange stripe is located on the socket, which tears during pressing and can be removed by hand.

Both joints – the 18 mm socket and the 28 mm insertion end in the connecting fitting – are pressed using single-piece dies with profile M. Insert the pipe all the way to the stop and mark its position with a marker. The O-ring may only be moistened with water, never with oil or grease, and each joint is pressed only once.

Warning: Pressed joints must be made by a qualified person according to the IVAR.PRESS FITTING SYSTEM instructions. Before starting the heating system, the manufacturer recommends flushing the entire system.

Technical parameters

Frequently asked questions

Can the IVAR.IVN412 reduction be used for potable water?
No, fittings made of AISI 304 steel in this range are not suitable for potable water. They can be used, for example, in closed heating and cooling circuits, solar systems, or for compressed air.

How is the 28-18 mm reduction connected?
The 18 mm pipe is inserted into the press-fit socket of the reduction and pressed. The smooth 28 mm end is inserted into the press-fit socket of another 28 mm fitting and pressed together with it.

Which press-fit dies are required?
Both joints – the 18 mm socket and the 28 mm insertion end in the connecting fitting – are pressed using single-piece dies with profile M. Dies with profile V must not be used for this system.

How can I recognize an unpressed joint?
The 18 mm socket has an LBP O-ring, which allows liquid to escape during pressure testing of an unpressed joint. An unpressed socket is also indicated by an intact orange stripe.