Description
Note: Many products are not yet listed. Please contact us for more product information. Our supply channels are constantly expanding, and we currently have 20 stable shared supply channels. Please confirm the model, product, price, and all other necessary information with customer service before placing an order. We offer new, refurbished, and used products, and prices are adjusted according to the year of the item you require.
3. Product Introduction
When a damper fails to spring closed on a loss-of-power event, room pressure swings and the alarm log fills with nuisance trips. The Yamatake EST0240Z05WBX00 is an electric spring-return actuator built for that duty: it modulates on a 0–10 V signal and drives to a safe position when supply drops. It mounts on damper or valve linkages in air-handling units and small process skids. Verify torque, stroke, and spring direction against the OEM datasheet before you swap (—though your mileage may vary by linkage).
EST0240Z05WBX00
EST0240Z05WBX00
EST0240Z05WBX00
4. Key Technical Specifications
| Parameter | Value |
|---|---|
| Catalog Number | EST0240Z05WBX00 |
| Brand | Yamatake (Azbil) |
| Product Type | Electric spring-return actuator |
| Supply Voltage | 24 V AC/DC nominal — verify exact range with OEM datasheet |
| Control Signal | 0–10 V DC — verify input impedance and common wiring |
| Torque Class | 5 Nm — verify exact rated torque with OEM datasheet |
| Rotation/Stroke | 90° damper stroke typical — verify stroke and mechanical stops |
| Spring Return Direction | Clockwise or counterclockwise — confirm by model code and old unit |
| Feedback Output | Verify presence and signal type with OEM datasheet |
| Auxiliary Switch | Verify presence and contact rating with OEM datasheet |
| Mounting | Shaft clamp — verify shaft diameter and linkage hardware |
| Operating Temperature | Verify exact range with OEM datasheet |
5. Field Application & Technical Pitfalls (The Engineer’s Guide)
Where this actuator is critical:
- Air-handling units where the outdoor-air damper must close on power loss to protect coils from freezing.
- Variable air volume boxes and zone dampers where modulation and spring return both matter during a supply failure.
- Small process skids with a fail-safe damper or valve that must reach a known position without operator action.
Three pitfalls that bite during replacement:
- Spring return direction and mechanical stop. Warning: an actuator that springs the wrong way will drive against the stop and stall, or hold the damper open when you need it closed. Check the rotation arrow on the old unit and the model code before mounting.
- Control signal common and transformer phasing. Warning: a shared 24 V transformer with reversed common can make the actuator run erratically or drive full stroke with no command. Confirm the COM and signal terminal pair against the OEM drawing, not just the wire color.
- Linkage slip and stroke calibration. Warning: set the mechanical travel before you power the unit. A shaft clamp that slips on the third linkage arm can pass a bench test and fail under spring-return load. Verify spring return timing with the damper connected, not on a bare bench.
Lesson learned: A technician replaced a failed actuator, powered up, and watched the damper drive open during a simulated power loss. Root cause: the replacement was a reverse-spring variant, and nobody checked the rotation arrow. The actuator was good; the spring direction was not. One frozen coil later, the maintenance team added a rotation check to the work order.
6. Quality Control (QC) SOP & Transparency
- Inbound Verification. Each actuator is checked against the OEM packing list, label typography, serial number format, and date-code range. Model code, rotation direction, and voltage rating are logged before the unit enters stock.
- Live Rig Testing. The actuator is mounted on a bench fixture with a 24 V supply, a 0–10 V signal generator, and a damper simulator. We drive full stroke, confirm modulation, cut supply, and time the spring return under a modest load.
- Parameter Testing. Supply current draw, insulation resistance, and shaft clamp condition are checked against the OEM datasheet where published. Undocumented values are flagged for buyer confirmation rather than guessed.
- Final QA & Packaging. The actuator ships in a protective bag with a QC-passed label, a test record showing the rotation direction and spring-return timing we verified, and photos of the label and shaft clamp when available.
7. Frequently Asked Questions (FAQ)
Will this replace my existing Yamatake actuator directly? Only if torque, stroke, rotation direction, and control signal match. Send the old label photo and a picture of the linkage. Exact compatibility depends on the model code and damper hardware, not just the catalog number.
What’s the warranty? 12 months from delivery for functional failure under normal operation. Mounting hardware and linkage kits, if included, carry a 90-day replacement guarantee.
How can I tell genuine OEM from refurbished? Genuine units carry the original Yamatake/Azbil label with consistent typography and a traceable serial number. Refurbished units carry our QC tag in addition to the OEM label, and we disclose condition on the quote.
Do you test the spring return before shipping? Yes. We cut supply on the bench fixture and time the return stroke under load. The test record notes the direction and timing we observed.
Does it include the mounting kit and shaft clamp? The shaft clamp is normally included unless noted. Linkage hardware and damper-specific brackets are not. Confirm shaft diameter before ordering.
Can I hot-swap the actuator while the air handler is running? No. Remove power and confirm the damper is in a safe position before replacement. Live swapping can drive the linkage unexpectedly or damage the actuator.
What do you need to quote the right replacement? Old label photo, shaft diameter, rotation direction, control signal type, and a picture of the linkage. That five-minute upload prevents most wrong-part returns.
