Product Overview
The Bürkert 8694 (part number 00227423) is a high-precision electropneumatic positioner engineered for the closed-loop control of pneumatically actuated process valves. As a member of Bürkert’s proven 8694 series, this unit converts a standard electrical control signal into a proportional pneumatic output pressure, enabling accurate valve stem positioning across the full stroke range. The device operates on a force-balance feedback principle, continuously comparing the setpoint signal against the actual valve position and modulating the pilot air supply to correct any deviation. This makes it an essential control component in automated process lines where precise throttling, flow regulation, and reliable shut-off are critical to overall system performance.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Electropneumatic Positioner (Process & Pneumatic Valve Control) |
| Model Designation | 8694 / 00227423 |
| Manufacturer | Bürkert |
| Control Signal Input | Standard analog electrical setpoint (0/4–20 mA or 0–10 V, model-dependent) |
| Pneumatic Supply Pressure | Standard instrument air range (typically up to 6 bar, filtered and dry) |
| Operating Pressure | Standard Industrial Grade (Up to rated bar) |
| Mounting & Connection | Standard ISO / Manufacturer Interface (NAMUR-style actuator mounting) |
| Feedback Method | Mechanical position feedback via lever / shaft coupling |
| Protection Class | Industrial enclosure rating (IP65/IP67, model-dependent) |
Engineering Features & Advantages
- Precision Performance: Closed-loop force-balance control delivers accurate, repeatable valve stem positioning with minimal hysteresis, ensuring consistent throttling and flow regulation across the entire stroke.
- Fast Dynamic Response: High-gain pneumatic pilot stage responds quickly to setpoint changes, minimizing process deviation in fast-cycling automated valve applications.
- Industrial Reliability: Built for continuous operation under severe industrial conditions, with a robust housing that resists vibration, dust, and moisture ingress.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original OEM standards, allowing drop-in replacement without modification to actuator mounting or pneumatic piping.
- Simplified Calibration: User-accessible zero and span adjustments enable straightforward commissioning and on-site tuning to match specific actuator characteristics.
Typical Industrial Applications
The Bürkert 8694 electropneumatic positioner is widely deployed in process industries requiring precise control of pneumatically actuated valves. Typical
PRODUCT IMAGES
BURKERT 8694 / 00227423 Electropneumatic Positioner
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- Authentic & Fully Tested: 100% bench tested for hydraulic response, pressure rating, and null-bias stability before dispatch.
- Fast Dispatch: In-stock units ready for same-day dispatch via DHL / FedEx Express directly to your plant.
- Pre-Shipment Verification: High-definition photos, video testing runs, and serial number verification provided prior to shipment.
- Peace of Mind: Covered by our 12-Month Replacement Warranty.
Shop the genuine Burkert 8694 / 00227423 Solenoid Valve. This Germany-made 24V DC hydraulic component features a 2-way normally closed design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.