Hydraulic Symbol
Description
Fixed-setting, 3-port Counter Balance Valves with pilot assist function similarly to the adjustable versions except the fixed setting is pre-set to a nominal value.
Operation
The check valve allows free flow from the directional valve (port 2) to the load (port 1) while a direct-acting, pilot-assisted relief valve controls flow from port 1 to port 2. Pilot assist at port 3 lowers the effective setting of the relief valve at a rate determined by the pilot ratio.
Technical Data
| Operating Pressure | Maximum setting = 280 bar; maximum recommended load pressure at maximum setting = 215 bar |
|---|---|
| Flow | See Performance Chart |
| Cavity | T20-3A |
| Internal Leakage | 0.4 ml/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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