CUTTING RING WITH TIGHT SEALING FOR PIPE FITTINGS DIN 2353 (ISO 8434-1)
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CUTTING RING WITH TIGHT SEALING FOR PIPE FITTINGS DIN 2353 (ISO 8434-1) - TORINO Corso Traiano, 70/72 Tel. 011-611508 / 6197041 Telefax 011-6191106 - PADOVA Via Navigazione Interna, 9 Tel. 049-7800933 Telefax 049-7800234 - BOLOGNA Calderara di Reno Loc. Bargellino Via dell’Industria, 4e Tel. 051-728889 / 728886 Telefax 051-727486 - AVELLINO S.Martino Valle Caudina Strada Statale 7 - km.246 Tel. 0824-832720 Telefax 0824-832720 - D-73760 OSTFILDERN-NELLINGEN Felix Wankel Str.21 Tel. (+49) 711-3412086 Telefax (+49) 711-3412142 - 28000 CHARTRES-FRANCE 1, Pôle Atlantis Téléphone: (+33) 2-37.30.24.66 Télécopie: (+33) 2-37.90.79.82 - 44335 NANTES-CEDEX 3 61, Rue de la Garde - BP93509 Téléphone: (+33) 2-40521905 Télécopie: (+33) 2-40521961 - 08107 MARTORELLES Barcelona (ESPAÑA) C/Can Fanosa n. 18 Poligono Industrial Roca Teléfono (+34) 93-5705895 Telefax (+34) 9

OUR ADRESSES HEAD OFFICE Rastelli Raccordi - s.r.l. 27019 VILLANTERIO (PV) -ITALIA Tel. (+39) 0382/963000 r.a. - 967257 - 967067 Fax. (+39) 0382/967080 - 963210 email: marketing.it@rastelliraccordi.com administration.it@rastelliraccordi.com sito internet: www.rastelliraccordi.it www.rastelliraccordi.com BOLOGNA Calderara di Reno - Loc. Bargellino Via dell’Industria, 4/e Tel. 051/728889 - 728886 - Fax 051/727486 email: bologna.it@rastelliraccordi.com Sales organization in Europe D-73760 OSTFILDERN-NELLINGEN Felix Wankel Str.21 Tel. (+49) 711-3412086 - Fax (+49) 711-3412142 email:...

CUTTING RING WITH TIGHT SEALING FOR PIPE FITTINGS DIN 2353 (ISO 8434-1) 1. CLAMPING RING AR3/C 1.1 PRESENTATION The new clamping ring AR3/C developed by RASTELLI RACCORDI specific, semplified product that is the version manufactured in stainless basic characteristics: (Figure 1), has been designed and with the aim of offering to the market a now available together with ring AR3, steel only, of which it keeps the following a) EASY ASSEMBLY b) ABSOLUTELY TIGHT SEALING c) AUTOMATIC CLOSING d) INTERCHANGEABILITY ON ALL FITTINGS WITH CUTTING RING 24° DIN 2353 (ISO 8434-1) 1.2 GUARANTEE OF...

CUTTING RING WITH TIGHT SEALING FOR PIPE FITTINGS DIN 2353 (ISO 8434-1) 1.3 PRODUCT TRACEABILITY SCHEME The rings AR3/C are preventively marked to allow the product traceability following the scheme of the Figure 2 below. Example of marking Ring AR3/C Ø 6LS Company logo Casting nr. Production year Type of Ring Production unit Ring size 2. CHARACTERISTICS 2.1 EASY ASSEMBLY The new clamping ring AR3/C allows the operator to perform assembly without the usual time-consuming and painstaking operations related to the control of the ring cut on the tube, such as: 1) Putting identification marks...

CUTTING RING WITH TIGHT SEALING FOR PIPE FITTINGS DIN 2353 (ISO 8434-1) 2.2 ABSOLUTELY TIGHT SEALING The ring AR3/C at its axial end, at the head side, features a vulcanised rubber sealed washer (Figure 3) and at rear an O-ring gasket placed in an annular recess. BEFORE CLAMPING In the clamping phase, the ring AR3/C, pushed by the nut onto the 24° cone of the fitting, causes the compression of the rubber seal of the washer on the fitting, which takes the position indicated in Figure 4, making the system absolutely tight. AFTER CLAMPING The special form of the o-ring seat is also crucial,...

CUTTING RING WITH TIGHT SEALING FOR PIPE FITTINGS DIN 2353 (ISO 8434-1) 2.3 AUTOMATIC CLOSING LIMIT also said: AUTOMATIC CLOSING The automatic closing of the ring AR3/C on the fitting body occurs when the ring itself, as an effect of the nut tightening, slides on the 24°cone of the fitting body (Figure 5) until the 2 surfaces A and B come in contact forming one piece, so forcing the operator to stop the clamping. BEFORE CLAMPING This system ensures the best cutting of the ring AR3/C into the tube. The only recommendation to follow is to check, after loosening the nut, that surfaces A and B...

CUTTING RING WITH TIGHT SEALING FOR PIPE FITTINGS DIN 2353 (ISO 8434-1) 2.4 INTERCHANGEABILITY ON ALL FITTINGS WITH CUTTING RING 24° DIN 2353 (ISO 8434-1) The new ring AR3/C is perfectly interchangeable with all the other clamping rings with one or two cutting edges which are used on the 24° cone fittings DIN 2353 (ISO 8434-1) With the ring AR3/C it is possible to use all equipments for manual pre-assembly (hardened steel blocks type TN 195) that are normally used for the traditional clamping rings RASTELLI TN 88 - TD 88 - AR3. RING TN88 DIN 3861 CONICAL CONNECTION 24°DIN 3861 ORDER...

CUTTING RING WITH TIGHT SEALING FOR PIPE FITTINGS DIN 2353 (ISO 8434-1) 3 TECHNICAL DATA 3.1 TECHNICAL DATA SURFACE FINISH WHITE PASSIVATION treatment Fe/Zn 8 – UNI ISO 2081 with trivalent Chrome (free from hexavalent chrome) with SEALER in compliance with the European Norm EC 200/53 MATERIALS AND MAX. WORKING TEMPERATURES „TB“ (DIN 2401) Metal parts: Steel (DIN 3859) -40°C ÷ +120°C Rubber parts: NBR (Perbunan® Bayer) -35°C ÷ +100°C PRESSURES The PN RATED pressure corresponds to a safety factor of PN x 4. The pressures indicated are the MAXIMUM WORKING pressures, including peak values under...

CUTTING RING WITH TIGHT SEALING FOR PIPE FITTINGS DIN 2353 (ISO 8434-1) 4 ASSEMBLY 4.1 ASSEMBLY INSTRUCTIONS a). PREPARATION OF INSIDE AND OUTSIDE OF THE TUBE a.1) Cut the tube at right angle. A maximum deviation of 0.5° is allowed from the tube axis. a.2) The right angle-cutting is easier by using a hand saw with suitable device. ATTENTION!: Do not use PIPE CUTTERS OR CUTTING-OFF MACHINES. a.3) Slightly trim the tube internally and externally without damaging the mating surface (max chamfering 0,2 x 45°). b). MINIMUM TUBE LENGTH b.1) Minimum length of the straight tube in elbows: at least...

CUTTING RING WITH TIGHT SEALING FOR PIPE FITTINGS DIN 2353 (ISO 8434-1) 4.2 DIRECT CONNECTION TO THE FITTING BODY FOR STEEL d.1) Insert the tube into the fitting until it stops and tighten nut TN 81 completely by hand ATTENTION!: The tube should rest completely against the fitting shoulder, otherwise an accurate cut of ring AR3/C is not possible. d.2) Tighten nut TN 81 till meeting a strong (sudden) resistance caused by the coupling of surfaces A – B (AUTOMATIC CLOSING) (Figure 3) . Control that the tube is not turning with nut TN 81. Loosen nut Tn 81 and check that surfaces A – B are in...