Function and configurationThe check valve Z2S6 is a pilot operated check valve in sandwich plate design.It is used for the leakage-free closure of one or two actuator ports even during long standstill...
Product Detail
Function and configuration
The check valve Z2S6 is a pilot operated check valve in sandwich plate design.
It is used for the leakage-free closure of one or two actuator ports even during long standstill periods.
Fluid flows freely in direction A1 to A2 or B1 to B2 and in the opposite direction the flow is blocked.
If fluid flows from A1 to A2, the piston (1) is moved to the right and pushes the poppet (2) off its seat,
then the pressure fluid may flow from B2 to B1.
In order to make the reliable closure of the poppets (2) the ports must be connected to tank when the directional valve is in the central position (see circuit example).
Ordering code
Symbols (①=valve side, ②=sub-plate side)
Circuit example
Technical data
| Fluid | Mineral oil suitable for NBR and FKM seal |
| Phosphate ester for FKM seal | |
| Degree of contamination | Maximum permissible degree of fluid contamination:Class 9. NAS 1638 or 20/18/15, ISO4406 |
| Pressure fluid ℃ temperature range | -30 to +80 (NBR seal) |
| -20 to +80 (FKM seal) | |
| Viscosity range m㎡/s | 2.8 to 500 |
| Operating pressure bar | 315 |
| Max.flow-rate L/min | 60 |
| Flow direction | See symbols |
| Flow freely opening pressure bar | See curves |
| Ratio of areas | A1/A2=1/3 |
| Weight kg | Approx.1.0 |
Characteristic curves (Measured at ϑₒᵢₗ=40°C ±5°C, using oil)
Unit dimensions
