The VU size vary consists of two various normal openings at 5 to 65 psi. The VU sequence may also be utilized for a strain sequence valve by altering the internal spring loading for the expected cracking point, based on the valve dimension. Ball check valves, swing check valves, wafer http://valvesandfittings25791.bloggin-ads.com/12290131/the-basic-principles-of-hydraulic-check-valve