four circuit protection valve
Original No. 2632 4370 0155 
Port1/21/23/24 φ15±0.05             Port22:M22x1.5     
Open pressure:port21,22=0KPa              
Port23, 24=(640-670)KPa   

four circuit protection valve
Original No.S4457-01330 
Port1:NPT3/8       Port21/22/23/24 NPT1/4 Open pressure:port21,22=0Kpa           Port23=(630-660)kpa     Port24=(530-560)kpa

Two Circuit Protection Valve
Original No.934 700 040 0 
M16x1.5/M22x1.5.  max.perating pressure:10bar.7 Ports.       21/22=6.0bar,