Compression Fittings

Home
** Klassifikationsdaten **

u2-Lok Twin ferrule fittings

Threaded Fittings

Ball valves, Valves

Clino Aseptic Connections

Cavity Free Ecotube Couplings

Push-In/On Connectors

Quick Release Couplings

Cone Sealing Couplings

Hose Fittings

Orbital Welding Fittings

Tubes

Pipe Clamps

H2-Lok Twin ferrule fittings

Instrumentation Thread Adapter

Measuring and Control Technology

37° JIC Flare Fittings

ZeroCon

Small flange connections DIN 28403

Aquapress compression fittings

High Pressure Soldering Fittings

Assembly aids

Compression Fittings EN ISO 8434-1

Not all fittings are the same! This sentence applies in particular to stainless steel tube fittings and connections where maximum safety and minimal downtime are important.

The heart of a cutting ring fitting according to EN ISO 8434-1 (DIN 2353) is the cutting ring. In most cases, the specially designed and tested Two edge cutting rings are used, which have shown themselves to be very precise and highly reliable a million times. The cutting ring seals the fully assembled screw in three prominent places.

Important information on technical changes, applications, standards and guidelines

Stainless steel compression fitting

Description of a cutting ring fitting

The 24° stainless steel cutting ring fitting in accordance with European standard ISO 8434 is a fitting for connecting and joining pipes. It is used in many industries in which liquid or gaseous media must be transported and the highest demands are placed on material and tightness

These include plant engineering with its diverse applications in hydraulics and pneumatics, as well as the paper, chemical and food industries. It is also used in the general oil and gas sector as well as specifically for hydrogen.

The cutting ring fitting is made up of three components: a connecting piece, the cutting ring and the union nut. The function is only guaranteed in combination with a seamlessly drawn pipe. The connecting piece, with the standardized 24° connection cone, serves as a media-conducting base body and is available in straight, angled, T or cross piece versions

The cutting ring is the heart of the cutting ring fitting. Schwer Fittings uses a hardened 2-edge cutting ring with a specially developed cutting contour that has proven itself millions of times over. This actually cuts into the pipe with both edges and performs both the sealing and retaining function of the connection

By tightening the union nut during final assembly in the connection piece, the pre-assembled cutting ring is guided into the cone of the connection piece. The seal is created by the cone in the spigot and the cut in the pipe. The cutting ring must be pre-assembled with a hardened pre-assembly spigot. This can be done manually or with an electrohydraulic machine.

Functional description of the Compression Fittings:

During pre-assembly, the cutting ring is pressed through the union nut into the 24° cone of the pre-assembly spigot. The cone is used to guide the cutting edges into the surface of the pipe, creating an incision with both cutting edges.

A ring-shaped material build-up forms on the surface of the pipe at the end of the cutting edge

If the pipe is cut at an exact right angle and deburred cleanly, three prominent points can be sealed in the fully assembled fitting.

Pre-assembly in the connecting piece is not possible, as this would damage the sealing surface. Only the final assembly of the screw connection takes place in the connection piece. Please also refer to our installation instructions and videos with the corresponding pipe recommendations to ensure that the fitting works perfectly.

Schneidringverschraubung, Schneidring, Rohrverschraubung, Hydraulikverschraubung, Fluid

The cutting rings are divided into 3 series:

LL: for compressed air, plastic pipes, laboratory apparatus; especially in the low pressure range up to max. PN 100

L: at larger size pressure loads up to max. PN 315, in the field of measurement and control technology, paper and plastics industry, pharmaceutical industry, aerospace, hydraulic systems and in the paint and coatings industry

S: at high pressure, vibrations and high mechanical. Stresses in heavy machinery, shipbuilding, mining, chemical industry, industrial refrigeration, harbor and lock installations, offshore, petrochemical, usually in the pressure range from 250 up to PN 400 using kegligen screw threads to PN 630th

When installing stainless steel pipes, pre-assembly must only be carried out in the hardened VOMO. Direct assembly in the stainless steel socket must be avoided! The VOMOS cones are subject to wear and must therefore be checked at regular intervals with a cone gauge to ensure that they are true to gauge. To prevent incorrect assembly from the outset, worn VOMOS must be replaced with new ones.

The laser-engraved test number on the media-bearing parts guarantees traceability to the original material and the assignment of the 3.1 certificate with all mechanical tests, even years later. The sizes from 6 to 42 mm and pressures up to 630 bar ensure a wide range of applications for the fittings. The range is rounded off by a choice of thread types (cylindrical, metric, tapered, NPT). Individual and customer-specific solutions are a matter of course thanks to in-house production, as is professional quality management. All parts are available immediately from stock with a DIN EN 10204 certificate.

Tubes: Seamless, soft annealed precision stainless steel tubes made of material 1.4571 in accordance with DIN EN ISO 1127 tolerance class D4/T3 are recommended; do not use welded tubes: the material structure in the area of the weld seam is altered, which can change the cutting behavior of the cutting ring. For cost reasons, however, thin-walled tubes are often used which cannot withstand the pressure of the cutting ring during assembly. We recommend the use of reinforcing sleeves to ensure that the fitting still functions properly.

24° Taper Couplings

The directional adjustable 24° sealing cone fittings are stainless and suitable for connection to threaded fittings to DIN 3853 with 24° -Inner cones.

Functionality:

The union nut is rotatably mounted on the neck of a body. The pin is thereby between two semi-circular in cross-section radial grooves of the neck and the nut and then performs the holding function of the taper coupling. The sealing is achieved by the O-ring 24° - Taper couplings in the range of 24° -lnner cone the threaded connector (bore form W to DIN 3861).

Benefits:

Adjustable direction by the rotatable cap nut on the neck
Screwed onto threaded fittings normally provided for cutting ring connections to DIN 3853
Small cross-sectional variation
Easy and quick assembly by tightening distance fixed at low torque
High leakage security by O-ring seal
High load capacity with pressure fluctuations and vibrations in the system
High rip out protection by interlocking construction

24° Weld Fittings

In the 24 ° -Weld nipple fitting the pipe welding side is adjusted depending on the diameter and wall thickness of the pipe dimensions. The seal between the fitting and the welding nipple is an O-ring, which is mounted on the 24 ° cone of the welding nipple.

Area video

Information from our product management about product variants, function and areas of application.

Assembly of a 24° Compression fitting according to EN ISO 8434-1

Observe the generally applicable safety regulations when handling tools and machines. Wear appropriate protective clothing.

Training video

Information from our assembly expert on the function and operation of the PACE1 Press.

Quality Management System

In addition to national and international certifications the company Schwer Fittings is additionally certified regularly by customers. Through our own developments and solutions Schwer Fittings has numerous patents and registered designs. Furthermore, we offer the following certificates to download: