Issue link: https://onenorgren.uberflip.com/i/1528936
130 For further information, visit www.norgren.com and use the new improved search function. If you cannot see the option you require please contact us. 2 VALVES 2 (A) D 2 (A ) 1 (P) 3 (R) 1 1 DOUBLE VALVE Series XSz with dynamic monitoring » Inherently fail-safe without residual pressure » Dynamic self monitoring » Double valve control system » For use with pneumatic clutch and brake systems and other 3-way safety functions, such as monitored dump valve with feedback system » Poppet design with feedback signal ports » Fast exhaust capability » Meets the intent of Press Safety Standards - ANSI B11-1 2009; CSA Z142-10, BG692, OSHA Code 29 part 1910.217 (b) (7) (I and XI). Conforms to ISO 13849-1 (performance level "e" category IV) » Improves safety and reduces downtime » Quick and easy adjustment of 'overlap'on mechanical presses » No additional electrical monitoring required » Easily fitted into existing systems » Norgren ® /Herion ® XSz safety valves are also available in 5-port configuration Technical Data Medium: Compressed air, filtered, lubricated or non-lubricated Shell Hydrol DO 32, Esso Febis K 32 (as of July 1992) or comparable oil with DVI values < 8 (DIN 53521) and ISO viscosity class 32-46 (DIN 51519), Filtration 25 - 50 mm Operating pressure: XSz 8 & 10 43 to 145 psig ( 3 to 10 bar) XSz 20, 32 & 50 29 to 116 psig (2 to 8 bar) Temperature range: 14°F to 140°F (-10 to 60°C) To secure the safety function of the valve at subzero temperatures it is important that the air is dry enough to prevent an icing of valve and silencer. Flow: XSz 8 Cv up to 1.7 XSz 10 Cv up to 6.8 XSz 20 Cv up to 13.9 XSz 32 Cv up to 31.4 XSz 50 Cv up to 57.6 Mounting position: Preferably vertically Additional equipment: So clutch module So brake module Safety silencer Failure indication elements Nozzle for overlap adjustment (exclusively XSz32 and 50) Materials: Body: aluminium Seals: polyurethane (AU), NBR Materials: Body: aluminium Seals: polyurethane (AU), NBR 3 (R) 2 (A) 3 (R) 1 (P) 1 (P) 1 (P) 2 (A) 3 (R) 2 (A) Solenoids de-energized: A port is exhausted. P port is closed, no connection from P to A. No residual pressure on port A as port A is freely exhausted through port R. No acting pressure on port A. 1 (P) = Air pressure port / 2 (A) = Power port (clutch / brake) / 3 (R) = Exhaust Norgren® XSz Safety valves comply with the Category IV of DIN EN ISO 13849-1, if the operating system has been designed and realized according to Category IV. Solenoids energized: Pilots are synchronously energized. Connection from port P to A. Working pressure on A. No passage from P to R. Dynamic self monitoring of both pilot systems, checking each other at each cycle for proper functioning. Malfunction: Pilots non-synchronously energized. Dynamic monitor notices failure operation and prevents the pistons from giving connection from P to A. Synchronously port A exhausts through R. No residual pressure remains in the system since P and A are not connected. The pilot line has lost the pressure and is locked.