The minimum pressure to pilot open a CKCB XCN, which is a 30 psi (2 bar) cracking pressure, is about 45 psi (3 bar).To open a pilot-to-open check valve with 3000 psi (210 bar) at port 1, 1045 psi (72 bar) of pilot pressure is required at port 3; this equates to a 2.9:...