The dhsea super high pressure solenoid valve with oval gear flow meter delivers precise oil metering in demanding hydraulic environments. This integration combines fast-acting solenoid control with positive-displacement measurement for consistent flow regulation.
Engineers rely on this configuration for compact footprint, reliable shutoff, and repeatable oil dosing in mobile and industrial power units. The following sections detail performance, installation, and operational guidance.
| Part Number | Max Pressure | Orifice Range | Metering Accuracy |
|---|---|---|---|
| DHSEA-250-350-OM | 350 bar | 0.5–5 L/min | ±1.5% of setpoint |
| DHSEA-315-400-OM | 400 bar | 1–10 L/min | ±1.0% of setpoint |
| DHSEA-350-500-OM | 500 bar | 2–15 L/min | ±0.8% of setpoint |
| DHSEA-400-600-OM | 600 bar | 5–20 L/min | ±0.5% of setpoint |
Performance Under High Pressure Conditions
Operating with backpressures up to 1.1× inlet pressure, the dhsea super high pressure solenoid valve oval gear flow meter sustains stable meter movement and minimizes slip. Special hardened gears reduce wear, maintaining metering linearity across wide pressure swings.
Dynamic response remains within 50 ms, enabling fast sequence control without oil column oscillations. Pressure spikes are damped by the oval chamber, protecting downstream sensors and actuators.
Oil Compatibility and Filtration Requirements
Suitable for mineral oils, biodegradable HFR-C fluids, and synthetic esters, the valve requires particle counts below ISO 4406 16/13 for long service life. A 10 μm strainer before the inlet is recommended to prevent gear cavity contamination.
Viscosity stability between 25 and 460 cSt ensures consistent meter calibration. Avoid fuels, alcohols, and poorly lubricated hydrocarbons that can swell seals or cause cavitation at high speed.
Installation Orientation and Piping Layout
Mount the unit in any orientation, but follow port labeling to avoid trapped air in the oval gear chamber. Use short, rigid manifolds with gradual bends to reduce pressure drop and vibration transmitted to the meter.
Install a pulse output line length compensation loop when running above 200 Hz switching, and avoid parallel runs of high-current coils to prevent inductive interference with measurement signals.
Operational Settings and Calibration Modes
Factory presets cover 10–100% duty cycle with mid-position hold-off to prevent chattering near zero flow. Field technicians can recalibrate via PC software using the integrated Hall effect sensors, verifying each gear tooth passage for count integrity.
Temperature-compensated lookup tables adjust meter division values in real time, ensuring volumetric accuracy from −20 to 65°C oil temperature. Calibration certificates include error curves across pressure, viscosity, and temperature ranges.
Key Implementation Recommendations
- Verify system backpressure stays below 1.1× inlet pressure to avoid gear slip.
- Mount a 10 μm filter directly upstream to protect the oval chamber.
- Use short, rigid piping to reduce air entrainment and vibration.
- Enable temperature compensation in the controller profile for wide-range operation.
- Schedule annual calibration checks under actual pressure and temperature conditions.
FAQ
Reader questions
Can this valve be used in closed-loop hydraulic servo systems?
Yes, the fast 50 ms response and low measurement slip make it suitable for closed-loop control where precise oil metering is required.
What maintenance intervals are recommended for high-pressure operation?
Inspect the 10 μm inlet strainer every 500 operating hours, and perform a bench calibration annually or after 10,000 hours, whichever comes first.
How does temperature variation affect the oval gear meter accuracy?
Built-in temperature compensation adjusts division values in real time, keeping volumetric error within ±0.8% over the −20 to 65°C range.
Is external power supply filtering required for the coil in noisy environments?
Use a ferrite core and twisted-pair wiring for the coil supply, and add a snubber across the terminals if switching exceeds 150 Hz.