Inquiry (采购产品): crack pressure Good afternoon, my names is Robbie McAuley, i am a jr. buyer for Shell Canada here at head office in Calgary, Alberta, Canada. For a certain check valve (SS PARKER 4F-C4LSS).. we have purchased from a supplier (AGS group).. they need to know the crack pressure for this, whether it is 1, 5 or 10 PSI.. Please advise and email me back at robbie.mcauley@shell.com Thankyouverymuch **** Hidden Message ***** Robbie McAuley Calgary, AB t2j4a7 CAN Company: Shell Canada Title: Junior Buyer Phone: (403) 3845490 E-mail: robbie.mcauley@shell.com **** Hidden Message ***** robbie.mcauley@shell.com