PERFECT
EXPERIENCED
& HIGH QUALITY SERVICE
General Information
STAUFF Connect 24° Tube Fittings with Cutting Ring
have been developed and designed for the reliable,
leak-free connection of metric tubes with outside
diameters between 4 mm and 42 mm / between .16 in
and 1.65 in respectively.
Therefore, the most relevant key dimensions of the
tube fittings (e.g. through bores and widths across
flats) also have metric dimensions.
With regards to their dimensioning and general design,
STAUFF Connect 24° Tube Fittings with Cutting Ring
fully comply with the latest versions of the ISO 8434-1
and the DIN 2353 standards.
The operating principle of STAUFF Connect 24° Tube Fittings with Cutting Ring is based on a double-edge cutting ring, which cuts into the tube twice, thus ensuring the necessary force and form closure in the cutting area.
Thanks to the optimised geometry of this ring, the two edges do not cut simultaneously, but rather one after the other. In addition to increasing the incising effect, this method maximises the tear strength of the fitting.
Due to the design of the double-edge cutting ring in the central region as well as in the shoulder area, a larger tube support surface with a high surface pressure is achieved without jamming the cutting ring. This ensures uniform distribution of force. The outer support surfaces of the cutting ring are smoothed, thus minimising friction losses during assembly and guaranteeing the maximum degree of safety during use.
STAUFF Connect 24° Tube Fittings with Cutting Ring even exceed the ISO requirements in pressure: They can be used in applications with nominal pressures up to 500 bar / 7250 PSI in the Light Series and up to 800 bar / 11600 PSI in the Heavy Series (depending on series, type and size of the components – pressure reduction factors to be considered).
For dimensional reasons, STAUFF Connect 24° Tube Fittings with Cutting Ring in the Extra-Light Series use single-edge cutting rings (suitable for nominal pressures up to 100 bar / 1450 PSI).
General Information
Soft-Sealing Cutting Rings provide an additional safety
and protection against potential leakage risks, e.g.
caused by the settling of purely metallic sealed connec-
tions, temperature fluctuations or considerable pressure
and vibration loads in the system. "Sweating effects" on
the connection points can be permanently avoided.
The type FI-WDDS Soft-Sealing Cutting Ring of the
STAUFF Connect range is characterised by the elasto-
mer sealing, which is located in a specially designed
groove close to the rear end of the 24° taper and pro-
tected to prevent loss. An additional o-ring is used to
secure the secure the second potential leakage path between the cutting ring and the tube – even in the event of unfavourable tolerances
FKM/FPM (Viton®) is used as the standard sealing material and enables problem-free use of the system for challenging applications involving high temperatures or aggressive media.
Like all other components in the STAUFF Connect product range, the cutting ring itself is designed as standard with a high-quality zinc/nickel surface coating. With over 1,200 hours of resistance to red rust / base metal corrosion in the salt-spray chamber in accordance with DIN EN ISO 9227, the coating offers most reliable corrosion protection far beyond previously accepted market standards.Even after shipping, handling and assembly of the components, the coating significantly exceeds the requirements for the highest corrosion protection class K5 defined in VDMA Standard Sheet 24576 for tube connectors.
Alternative materials and surface and surface finishings are available on request.
Both elastomer sealings are located in the secondary sealing zone of the connection. Static and dynamic loads in the system are primarily compensated by the tried and tested metallic sealed area. When assembled, the soft-sealing elements are almost completely chambered (as gap-free and cavity-free as technically possible). This prevents extrusion of the sealings and contributes to the excellent longterm stability of the system.
Type FI-WDDS Soft-Sealing Cutting Rings convince through their simple assembly in the fitting body: Use a suitable spanner to tighten the union nut until the point where the cutting ring comes into contact and sits closely with the face side of the fitting body. This point is characterised by a significant increase in force.
Due to the design, the risks of insufficient assembly as well as over-assembly of cutting rings (which can lead to damage or radial constriction of thin-walled tubes) can be significantly reduced.
As a matter of course, the recommended material raise in front of the first edge of the cutting ring after the completed assembly is clearly visible to tube fitters and inspectors and makes it easy to check and confirm the correct assembly – as required by the norm.
Type FI-WDDS Soft-Sealing Cutting Ring are available for all metric tubes with outside diameters between 6 mm and 42 mm / between .24 in and 1.65 in respectively. They even exceed the ISO requirements in pressure and can be used in applications with nominal pressures up to 500 bar / 7250 PSI in the Light Series and up to 800 bar / 11600 PSI in the Heavy Series (depending on series, type and size of the components – pressure reduction factors to be considered).
Users benefit from the great versatility and flexibility of the system, as well as the many combination and adaptation options offered by using standard components from the STAUFF Connect product range (in accordance with the latest versions of the ISO 8434-1 and the DIN 2353 standards). There is therefore no need to duplicate the stock-keeping of similar components with a correspondingly high likelihood of confusion, as is often the case with comparable systems. Material and logistics costs can thus be correspondingly reduced.
Connections using regular, purely metallic sealing double-edge cutting rings can be interchanged without any problems.
General Information
Due to the 24° taper (with o-rings) located on the fitting
body itself, STAUFF Connect Tube Fittings with 24° Taper
/ O-Ring (DKO) represent a logical further development
of traditionally available adjustable standpipe tube fittings
with factory-assembled cutting rings and union nuts.
The retention function is assured by a special swivel nut
with a wire-pin located in a groove, which is factory-assem
bled by the manufacturer. The embedded o-ring on the 24°
taper ensures a high level of protection against leakage.
Thanks to the large number of available types and designs,
almost all common types and combinations of adjustable
fittings can be implemented.
With regards to their dimensioning and general design, STAUFF Connect Tube Fittings with 24° Taper / O-Ring (DKO) fully comply with the latest versions of the ISO 8434-1 standard. They are thus completely interchangeable with conventional adjustable standpipe tube fittings.
General Information
Performance
The patented STAUFF Form tube forming system is without doubt one of the most high-performing solutions currently available on the market for connecting metric sized tubes. Apart from its simplicity, it also provides a maximum level of safety, reliability and reproducibility.
STAUFF Form has been designed as standard for seamless cold-drawn precision steel tubes as well as stainless steel tubes with dimensions between 6 x 1.5 mm and 42 x 4 mm in the Light Series and between 6 x 1.5 mm and 38 x 6 mm in the Heavy Series. Parameters for alternative materials (copper, brass, CuNiFe, Tungum etc.) can be added by the manufacturer, if required.
System Design and Components
The system is based on standard parts and consists of only four key components:
The STAUFF Form Ring with an integrated and thus undetachable elastomeric sealing is slid onto the tube end, which has previously been mechanically contoured. This creates a positive-locking connection that provides a reliable, permanent and maintenance-free seal when used with a conventional fitting body with 24° conical bore and a union nut, both according to ISO 8434-1.
Versatility and Flexibility
Users benefit from the great versatility and flexibility of the system, as well as the many combination and adaptation options offered by using standard components from the STAUFF Connect product range.
There is therefore no need to duplicate the stock-keeping of similar components with a correspondingly high likelihood of confusion, as is often the case with comparable systems. Material and logistics costs can thus be correspondingly reduced.
Materials and Surface Finishing
Like all other components in the STAUFF Connect product range, STAUFF Form Rings are designed as standard with a high-quality zinc/nickel surface coating.
With over 1,200 hours of resistance to red rust / base metal corrosion in the salt-spray chamber in accordance with DIN EN ISO 9227, the coating offers most reliable corrosion protection far beyond previously accepted market standards.
Even after shipping, handling and assembly of the components, the coating significantly exceeds the requirements for the highest corrosion protection class K5 defined in VDMA Standard Sheet 24576 for tube connectors.
Sealing
The sealing of the only possible leakage path is provided primarily by the large-volume elastomeric sealing fitted to the STAUFF Form Ring, which is specifically positioned between the surface of the tube and the 24° conical bore of the fitting body during assembly.
FKM/FPM (Viton®) is used as the standard sealing material and enables problem-free use of the STAUFF Form tube forming system for challenging applications involving high temperatures or aggressive media.
The unique sealing profile has a particularly large cross-section in order to provide a safe, reliable and permanent seal even in the event of unfavourable tolerances of the tube and fitting. The sealing effect is assisted by the system pressure of the hydraulic system so that the STAUFF Form tube forming system is also the perfect choice for high-pressure applications.
Pressure Resistance
When the STAUFF Form tube forming system is used in conjunction with genuine products from the STAUFF Connect product range, it provides pressure resistance of up to 800 bar in the Heavy Series and 500 bar in the Light Series (generally with a four-fold safety factor and depending on the series, design and size of the fitting body and taking into consideration various pressure reducing factors). This is the result of exceptional care taken in the development of the system and the selection, handling and processing of the raw materials.
Maximum tear-out strength can be guaranteed for the system due to the contour shaped at the tube end.
Final Assembly in the Fitting Body
Final assembly is performed by tightening the union nut until the point with clearly noticeable increase in force (fixed point). The assembly is completed with another turn by approximately 15° to 20° beyond this point.
This incredibly simple assembly method has several benefits for the user:
Considerably lower torques and short assembly paths(once the fixed point has been reached)
Significant increase in torque to clearly indicate the end of the assembly
Maximum safety to combat over-assembly
No need for time-consuming and expensive training
Connections made with the STAUFF Form can be untightened as often as required and reassembled without wear, as any damaging expansion of the 24° conical bore of the fitting body is technically avoided.
General Information
STAUFF Connect 37° Flared Tube Fittings have been developed and designed for the reliable, leak-free connection of tubes with a 37° flare with conventional fitting bodies with a 24° cone according to ISO 8434-1.
Thanks to the optimised geometry of STAUFF Connect 37° Flared Tube Fittings with metallic/elastomer sealing at the contact points both to the fitting body and the tube, efficient sealing is ensured, even if there are vibrations and pressure fluctuations / peaks.
STAUFF Connect 37° Flared Tube Fittings can be used in applications with nominal pressures up to 500 bar / 7250 PSI on the Light Series or up to 630 bar / 9135 PSI in the Heavy Series (pressure reduction factors to be considered).
General Information
Manual Final Assembly Stud Type FI-FK
Manual Final Assembly Studs of the FI-FK series facilitate the final assembly of cutting rings on tube ends, thus allowing for consistent assembly results with a maximum degree of accuracy, reliability and process stability
Characteristics and Features
Available in the Extra-Light, Light and Heavy Series according to ISO 8434-1 / DIN 2353
Hardened and wear-resistant
Marked with a groove for easier identification
Manual Pre-Assembly Stud Type FI-VK
Manual Pre-Assembly Studs of the FI-VK series facilitate the pre-assembly of cutting rings on tube ends, thus allowing for consistent assembly results with a maximum degree of accuracy, reliability and process stability
Characteristics and Features
Available in the Extra-Light, Light and Heavy Series according to ISO 8434-1 / DIN 2353
Hardened and wear-resistant
General Information
The STAUFF Press Assembly Machine SPR-PRC-POC allows
the pressure/position-controlled pre-assembly and final
assembly of cutting rings from the Extra-Light Series (LL),
the Light Series (L) and the Heavy Series (S) according to
ISO 8434-1 / DIN 2353 on tube ends with outer diameters
between 4 mm and 42 mm.
The machine is designed as a robust table-top device for
continuous operation in the workshop. It is used in con-
nection with hardened and wear-resistant assembly studs
FI-FMK and support plates FI-GP which are specially
designed for the machine-assisted assembly.
The combined pressure/position-control of the device allows wear on the assembly tools to be detected in time before it can have a negative influence on the assembly result. Maximum service life of the tools is achieved through careful handling of the components and practical operation of the assembly machine. Other factors are proper storage (protected against contamination and corrosion), regular cleaning and lubrication (with suitable lubricants) and thorough preparation of the tube ends before assembly (cutting, deburring and cleaning).
Short times for tool changes, setup and assembly make it possible to carry out series assembly of cutting rings as well as assembly of small and medium quantities with a high level of economic efficiency, reproducibility and process reliability. Among other things, this is achieved with the RFID transponders – which are integrated into the support plates for automatic tool size identification as a standard – and with the tool contact switch: this allows assembly processes to be automatically started and completed by simply pushing the tube end into the assembly stud without having to press any buttons. The assembly area is secured against interference by a light grid to comply with current accident prevention regulations.
The convenient operating panel on the cutting ring assembly machine allows the user to choose between pre-assembly and final assembly at any time:
When utilising the machine-assisted 50% pre-assembly, the fitter then has to manually finish the assembly by tightening the union nut by 180° (corresponds to 1/2 turns) beyond the fix point. With machine-assisted final assembly, the cutting ring has already cut 100% into the tube and the fitter only has to tighten the union nut by 30° (corresponds to 1/12 turns) from the fix point. Please pay attention to the corresponding assembly instructions in both cases.
Final assembly (100%) minimises the risk for errors (insufficient or excessive manual tightening) and the resulting leak potentials which can often lead to time consuming and expensive machine downtimes and environmental impact. Due to the time benefits during final tightening, final assembly by machine also generates clear saving potentials compared to manual direct assembly as well as to machine-assisted
pre-assembly.
In case of incorrect or incomplete assembly where pressure and position parameters significantly deviate from the values stored in the machine, it automatically stops the assembly process and displays a corresponding warning message on the operating panel.
General Information
The electro-hydraulically operated STAUFF Press Assembly
Machine SPR-PRC-MA allows the assembly of cutting rings
in the Light Series (L) as well as in the Heavy Series (S)
according to ISO 8434-1 / DIN 2353 on metric tube ends
with outer diameters from 4 mm to 42 mm.
Exchangeable heads allows the device to be adapted for
37° flaring of metric and imperial tube ends with outer
diameters from 4 mm to 42 mm and from 1/4 in to 1 1/2 in
respectively according to DIN 3949 or SAE J514 / ISO 8434-2.
Short times for tool changes, setup and assembly (even
when changing the assembly type from cutting ring assembly to 37° tube flaring) make it possible to carry out series production as well as the assembly of small and medium quantities with a high level of economic efficiency, reproducibility and process reliability with considerable reduction of times and cost of assembly of fittings.
The adjustable return stoke of the cylinder helps the operator to further optimise the total cycle times.
The machine is designed as a robust table-top device for continuous operation in the workshop. It is used in connection with hardened and wear-resistant assembly tools which are specially designed for the machine-assisted assembly.
General Information
With the battery-operated STAUFF Press Assembly Machine
SPR-PRC-H-M, STAUFF provides an ergonomically designed,
light-weight and at the same time robust device for the
assembly of cutting rings in the Light Series (L) as well as in
the Heavy Series (S) according to ISO 8434-1 / DIN 2353 on
metric tube ends with outer diameters from 6 mm to 42 mm.
The machine has been designed for hand-held, tripod- or
table-mounted operation and offers the best technical com-
promise between maximum flexibility, economic efficiency
and a high level of process reliability with considerable re-
duction of time and cost for the assembly of cutting ring
fittings.
Short tool change and setup times (with only a few seconds required to manually adjust the assembly pressure) make it possible to carry out the assembly of medium and even small quantities of cutting ring fittings, e.g. during maintenance, servicing, conversion and repair works on hydraulic pipe and tube systems. With the rechargeable battery being able to typically cover more than 200 assembly cycles per charge (depending on pressure settings and other influencing factors), the machine is also suitable for mass processing and production.
The assembly machine is by default supplied in a heavy-duty trolley transport case that is equipped with a range of accessories and also provides suitable space for the assembly studs.
General Information
The type SFO-F tube forming machine facilitates the econo-
mical and most reliable production of tube ends made of
steel, stainless steel and other materials with a contour
typical for the STAUFF Form tube forming system.
The machine is designed as a robust table-top device for
continuous operation in the workshop. It is used in connec-
tion with FI-FST tube shapers and FI-FB clamping jaws.
Tube shapers with FI-ID internal tube supports are used with
selected tube dimensions, which prevent the tube from
being constricted in the shaping area.
Tube shapers, clamping jaws and internal tube supports have been specifically designed for the mechanical forming process and can be quickly and simply replaced without the need for any tools, if required. The resulting short tool change and set-up times contribute to the high efficiency of the system as well as ensuring low cycle times.
All the tools needed for the forming process are clearly labelled with the tube dimensions so that assembly errors caused by incorrect assignment can be largely ruled out.
General Information
The STAUFF Clean System comprises of a pneumatic laun-
cher and a range of specially designed nozzles and projec-
tiles. The launcher uses standard industrial compressed air
pressure between 6 and 8 bar / 87 and 116 PSI to propel a
foam projectile through the nozzle and into the pipe, tube or
hose bore to have their inside surface cleanedfrom any un-
wanted contamination. This provides a safe and environmen-
tally friendly tool that requires little formal expertise to ope-
rate and apply.
The launcher is the part of the system that controls the air
supply to propel the projectile from start to finish of the cleaning job.
The nozzles are specially designed to affect an airtight seal on any pipe, tube or hose with or without end fittings. Its main purpose is to compress the foam projectile allowing it to enter the internal diameter of the pipe, tube or hose to be cleaned.
The projectile is the part of the system that does the cleaning: The foam projectile is sized to be approximately 15 % larger than the internal diameter of the pipe, tube or hose to be cleaned. The compression of the projectile against the internal wall cleans the internal surface and expels any loose contaminants from the end of the pipe, tube or hose.
The STAUFF Clean System is available as separate components or in a variety of kit forms comprising various nozzle types, adaptor and launcher, all contained in a heavy duty carrying case.
General Information
The STAUFF Thread Identification Board is intended to be
used as a universal tool for workshops, warehouses or sales
counters allowing quick and easy determination of common
thread types and sizes, e.g. for male stud tube connectors
and test couplings.
The board is available in two different versions:
Version FI-TIB-M/G with
13 metric threads (M8x1 to M48x2) and
8 BSP threads (G1/8 to G1 1/2)
Version FI-TIB-N/U with
8 NPT threads (1/8-27 to 1 1/2-11.5 NPT),
5 UNF threads (7/16-20 to 7/8-14 UNF) and
4 UN threads (1 1/16-12 to 1 7/8-12 UN)
Tube Connectors
24° Tube Fittings with Single/Double Edge Cutting Ring
Tube Fittings with 24° Taper / Oring (DKO)
Cutting Ring Assembly Studs
24° Flared Tube Fittings
STAUFF Form Tube Forming System
24° Tube Fittings with Soft-Sealing Cutting Ring
Cutting Ring Assembly Machines SPR-PRC-POC
Combined Cutting Ring Assembly and 37° Tube Flaring Machine SPR-PRC-MA
Assembly Tools / Devices
Portable Cutting Ring Assembly Machine SPR-PRC-H
STAUFF Form Forming Machine SFO-F
STAUFF Clean Pipe, Tube & Hose Cleaning System
Thread Identification Board
