Tube Forming System - STAUFF Form EVO

www.stauff.com STAUFF Connect 4 Performance The STAUFF Form tube forming system was first presented in 2015. Since the be - ginning it has undoubtedly been one of the most efficient solutions available on the market for connecting metric tubes. In addition to its simplicity, it convinces with a high degree of safety, reliability and reproducibility. With STAUFF Form EVO, STAUFF now presents the latest generation of the tube forming system, which is characterised by an increased level of e fficiency and v ersatility as a result of continuous o ptimisation. STAUFF Form EVO has been designed as standard for seamless cold-drawn precision steel tubes as well as stainless steel tubes with dimensions between 6 x 1.5mm and 42x 4mm in the Light Series and between 6 x 1.5mm and 38x 6mm in the Heavy Series. If required, parameters for alternative materials are available upon request and can be added by the manufacturer or via the cloud connection module integrated in the machines. System Design and Components The system is based on standard parts and consists of only four key components: The STAUFF Form EVO Sealing Ring 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 All components in the STAUFF Connect product range 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 of the STAUFF Form EVO Sealing Ring which is specifically positioned between the surface of the tube and the 24° conical bore of the fitting body during assembly. FKM (Viton®) is used as the standard sealing material and enables problem-free use of the STAUFF Form EVO tube forming system for challenging applications involving high temperatures or aggressive media. Thanks to the combined metal-elastomer sealing, the usage of the systeme in low-temperature ranges down to -35° C is possible without restriction – as is also the case with NBR (Buna-N®). The unique sealing profile has a particularly large cross-section in order to seal securely and permanently, even in the event of unfavourable tolerances of the tube or the tube fitting. Possible errors during assembly on the formed tube end are con - sistently avoided by the laterally equal profile of the sealing ring. The sealing effect is supported by the system pressure of the hydraulic system, so that the STAUFF Form EVO tube forming system is perfectly suited for high-pressure applications. 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 EVO 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. Layers ¡ Sealing ¡ Passivation ¡ Zinc/Nickel ¡ Steel Angle Torque 20° Final assembly a Clearly noticeable increase in force b Completed assembly a b STAUFF Form EVO Tube Forming System