| screw-in cartridge valves | 4sk303s check cart pilot op | ||
| pilot ratio | -3 : 3:1 | ||
| pilot piston seal | no pilot seal |
| Series | 4sk30 : 30 l/min [8 usgpm];350 bar [5000 psi] pilot to open poppet type check valve - complete valve | ||
| Seal | -s : nitrile (for use with most industrial hydraulic oils) | ||
| special features | none |
