Cartridge Valve Insert
Function R20 - 1:2 ratio with damping
Using a model N cover with a R20 insert, can provide directional control of flow from insert port A to B or from B to A. Pressurizing port X from a remote source will block flow from insert port A and B. With X connected to B, system flow is from A to B. Flow will be from B to A if X is connected to tank or A.
Damping can be achieved with a model R15 insert (area ratio 1:1.5) and R20 (area ratio 1:2). The poppet has a skirt with a damping notch which helps smooth shifting (reduces gain) of the poppet. R15/R20 inserts may be used with any check or directional function where a D15/D20 insert is ordinarily used.
The R10 insert (1:1), R15 insert (1:1.5), R20 insert (1:2) has smaller skirt and used as dampening function as well as for fine flow metering (reduced flow gain) during the notch engagement.
The adjustable poppet lift limiter restricts flow from A to B. The check function prevents flow from B to A. The X pilot port of the cover is connected to the B port of the insert.