SERTO

The radial principle

The SERTO radial system is unique. Thanks to this design, tube connections can be easily installed and disassembled. This saves time and money, because all of the components can be re-used, as nothing will be bent or damaged. In addition, the screw fittings can also be easily installed in very confined spaces.

Connect and save

The price for a tube system is determined by three factors: the fittings, the tube and the assembly time. If the tube system has to be dismantled, with SERTO you can save 30 % of the costs due to the inverse sealing function of its clamping ring screw fittings.

Elimination of the body cone of the fitting

In contrast to all other tube fittings, the sealing cone-shaped clampling ring is not in the body of the SERTO fitting, but rather in the nut. The plane surface of the body of the fitting permitt that components included in a tube system can be radially removed from the system.

Increased safety and time saving

For dismantling or reassembly, only the nuts of the relevant screw fitting need to be loosened. For more rapid assembly, the tubes can be pre-assembled with a nut and clamping ring and inserted radially into the piping network. This is not possible with a conical screw fitting.

More tubes in the same space

Because with SERTO the tubes do not penetrate into the body of the fitting, but rather are only in front of it, the body can be one or two spanner sizes smaller than a conical fitting. If the body is smaller, so are the nuts. The few millimetres which are saved make a big difference. More tubes can be installed in parallel in the same space.

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SERTO components can be combined like the elements in a building block set. The basic elements of our standard program are straight unions, male adaptors with various threads, elbows, panel and banjo unions as well as L, T and cross unions. Together with connecting parts from SERTO, innumerable, individual, compact solutions with metal-to-metal seals are available for prompt delivery.

Possibility of connection 1 (illustration, left side)

Connecting part replaces the compression ferrule, instead of the standard compression ferrule use​.​

• Reduction compression ferrule, in order to reduce by up to two dimensions
• Plug, to temporarily close off the line
• Tube stub, as replacement for a short tube section

Possibility of connection 2 (illustration, lower side)

Connecting part replaces compression ferrule and union nut, instead of nut and compression ferrule use.

• Male adaptor, to change to other thread types and sizes
• Female adaptor, to change to other thread types and sizes, as well as from external to internal thread

Possibility of connection 3 (illustration, right side)

Connecting part is mounted on the standard connection and acts as a tube, in addition to the standard connection use.

• Hose nozzle, to connect a hose
• Adjustable nipples with an imitation tube socket for an adjustable connection
• Reduction unions, to connect smaller tube diameters

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SERTO unions consist of a base part, compression ferrule, connection nut and reinforcing sleeve. Reinforcing sleeves are recommended for thin-walled tubes and plastic hoses because they stabilise the tube inner wall and provide enough resistance for necking.

In contrast to products from other suppliers, where the nut and the base part interlock conically, SERTO unions seal on the flat metal surfaces that are pressed together.

Benefits and advantages of SERTO radial mounting and metal-to-metal seal

• Practical design enables installations even where space is limited
• Radial mounting allows maintenance task considerably easier: time and money saving
• Flat metal sealing concept avoids materials that can age over time
• Compression ferrule unions do not damage tubes and hoses

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UNIONS ...resistant to vibration, water hammer and temperature change due to the elasticity of the SERTO compression ferrule system.

• Multiple figures
• Many combinations
• Compact sizes
• Easy and fast to install

Brass (CuZn40Pb2) SO-4 Program

The universal material for unlimited possibilities.

Application for non-corrosive to slightly corrosive air, gases, liquids and oils in a non-aggressive environment, in exemple, in machine building (lubrication, cooling etc.).

Use with tubes of plastic and seamless copper tubes with clean smooth surface. Further materials on demand.

Available SO 0... Program of connection nut type gas/BSP (British Standard Pipe) instead of metric threads, not interchangeable.

Characteristics:

• diameters from 2 to 35 mm
• pressure máx. of 250 bar (G Program, 125 bar)
• temperature from -196 to +180ºC

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UNIONS ...resistant to vibration, water hammer and temperature change due to the elasticity of the SERTO compression ferrule system.

• Multiple figures
• Many combinations
• Compact sizes
• Easy and fast to install

Stainless steel (1.4571) SO-5 Program

For high and extreme requirements.

Application for corrossive air, gases, liquids and oils in an aggressive environment, in exemple, in chemical plants and water treatment.

Use with tubes of plastic and stainless steel seamless precision tubes with clean smooth surface. Further materials on demand.

Characteristics:

• diameters from 1,6 to 28 mm
• pressure máx. of 250 bar (Series L for high pressures, up to 400 bar)
• temperature from -196 to +300ºC, up to 600ºC on request

Steel (galvanized with passivation) SO-6 Program

Proven and reliable, in particular for high operating pressures.

Application for non-corrosive air, gases, liquids and oils in a non-aggressive environment, in exemple, to connect precision steel tubes in the hydraulic field as in railway brake systems.

Use with seamless precision steel tubing and plastic tubing.

Characteristics:

• diameters from 4 to 30 mm
• pressure máx. of 125 bar
• temperature from -40 to +200ºC

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UNIONS ...resistant to vibration, water hammer and temperature change due to the elasticity of the SERTO compression ferrule system.

• Multiple figures
• Many combinations
• Compact sizes
• Easy and fast to install

Aluminium (AW 6082, nuts blue anodised) SO-1 Program

Versatile, robust and light unions (one third of the weight of stainless steel or brass), with good corrosion and weathering resistance, initially lubricated and therefore ready for installation.

Application for sea water, thermal fluids, mineral oils, petrol and various gases, in exemple, in cooling systems for power electronics, pneumatic lines, fuel/lubrication/break lines in vehicles, building services engineering and light-weight construction in general.

Use with seamless or not seamlessly drawn tubes and not drawn pressed tubes.

Characteristics:

• diameters from 8 to 28 mm
• pressure máx. of 125 bar
• temperature from -196 to +120ºC

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UNIONS ...resistant to vibration, water hammer and temperature change due to the elasticity of the SERTO compression ferrule system.

• Multiple figures
• Many combinations
• Easy and fast to install
• For tubes and hoses complying tolerance and with clean surface and uniform wall thickness

PVDF (polyvinylidenefluoride) SO-2 Program

Especially resistant to corrosive fluids and suitable for use in contact with foods (in compliance with FDA regulations).

Applications for corrosive air, gases and liquids in an aggressive environment, in exemple, of laboratories, process engineering, biotechnology and medical and laboratory technology.

Characteristics:

• diameters from 4 to 16 mm
• pressure máx. of 10 bar
• temperature from -40 to +100ºC

PA (polyamide) SO-3 Program

The main field of applications is pneumatic tubing, in possible combination with unions of brass, steel and stainless steel. Should not be subjected to direct sunlight.

Applications of non-corrosive air, gases and liquids in a non-aggressive environmen, in exemple, in industrial equipment manufacturing.

Characteristics:

• diameters from 4 to 12 mm
• pressure máx. of 10 bar
• temperature from -40 to +80ºC

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VALVES ...connect, distribute and control reliably and are evidence of the expertise and experience of SERTO in a wide range of applications.

Materials

• Brass
• Stainless steel (1.4571)
• Steel
• PVDF (polyvinylidenefluoride)
• PA (polyamide)

Types

• Regulating valve, straight and elbow shapes
• Fine regulating valve, straight and elbow shapes
• Taper seat non-return valve
• Needle valve
• Ball valve
• Stop cock
• Total-flow cock

Characteristics

• High integrity and compactness
• Excellent KV values
• Lowest turbulences
• Perfect flow characteristics
• Highest resistance to corrosion
• Large range of materials and methods of sealing
• Compact construction
• Long service life

Application

• For opening and closing lines, dosing, regulation of flows and control of the flow directions.

Tubes to use

• Tolerance complying tubes and hoses with clean surface and uniform wall thickness.

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SERTO not only offers a wide program of tube unions and valves, but also other complementary products and services. Whether you need - SERTO has it all !

• Quick-disconnect couplings: the simple way to make a connection
• Tubes and hoses: the suitable complement, for all requirements
• Accessories: tube clamps and brackets, sealing and protective materials
• Tools: tube and hose cutters, cost effectiveness pre-assembly tools
• Services: fitting treatments and coatings, customized products engineering

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