Hydraulic Symbol
Description
Screw in cartridge type.
Operation
When pressure at port 2 rises above the spring bias pressure, the check seat is pushed away from the piston and flow is allowed from port 2 to port 1. When load pressure at port 1 rises above the pressure setting, the direct-acting, differential-area relief function is activated and flow is relieved from port 1 to port 2. With pilot pressure at port 3, the pressure setting is reduced in proportion to the stated ratio of the valve, until fully open with free flow from port 1 to port 2. The spring chamber is drained to port 2, and any back-pressure at port 2 is additive to the pressure setting in all functions.
Technical Data
| Operating Pressure | Max setting pressure: 350 bar; maximum recommended load pressure at maximum setting = 270 bar |
|---|---|
| Flow | See Performance Chart |
| Cavity | T20-3AS |
| Internal Leakage | 15 drops/min max. to 85% of nominal setting |
| Temperature | -40°C to 120°C, with standard Buna seals |
Performance Curve
Flow performance should be reviewed together with pressure drop and working conditions.
Dimensions
Dimension drawing is provided for installation and cavity review.
Materials & Ordering Options
Materials, seal options, coil voltage, connector types and ordering options are shown for product selection review.
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Useful RFQ Information
Please provide the following information for faster matching:
- Original part number, current supplier reference or product photos
- Voltage, connector type and coil dimensions, if applicable
- Cavity, pressure, flow and seal requirements, if applicable
- Equipment application and expected quantity
- For custom manufacturing or special matching, drawings, samples or detailed photos are recommended for accurate review.
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