Motorized Ball Valve Auto Return Fail Safe Spring/Capacitor Reset Valve
Motorized ball valve auto return with fail safe function, spring & capacitor reset, brass/SS304 body for gas, HVAC, chemical pipeline safety control.
Description
1. Core Product Features
The motorized ball valve auto return—also known as the power‑off automatic reset electric ball valve—is built around a spring return motorized ball valve energy‑storage actuator. Two reset mechanisms are available: spring‑loaded and supercapacitor‑based. Under normal power, the motor drives the valve 90° to open or close the line.
Upon sudden power loss, the stored energy is released, returning the valve to its preset failsafe position—either Fail Closed (normally closed) or Fail Open (normally open). This makes it an essential self‑actuated safety interlock valve, outperforming traditional solenoid valves by eliminating the risks of coil burnout under prolonged energisation and lack of failsafe protection. A manual override is also provided as a secondary safeguard for maintenance safety. (Derived keywords: 2 wire auto return motorized ball valve, fail safe motorized ball valve.)
2. Materials & Technical Specifications
Body materials include brass, SS304, SS316, and WCB cast steel. Seals are available in PTFE or ceramic, suitable for media such as clean water, gas, mild acids/bases, and low‑temperature steam.
| Parameter | Specification |
|---|---|
| Standard Sizes | 1/4″ ~ 4″ (DN15 – DN100) |
| Flow Path | 2‑way / 3‑way (optional) |
| Supply Voltage | DC12/24V, AC110/220V |
| Control Wiring | 2‑wire / 3‑wire / 5‑wire |
| Reset Mechanism | Spring return / Capacitor energy storage |
| Failsafe Mode | Fail Closed (close on power loss) / Fail Open (open on power loss) |
| Working Pressure | PN16 – PN100 (Class 150 – Class 600) |
| Media Temperature | -20℃ ~ 180℃ |
| Protection Class | IP54 / IP65 (explosion‑proof optional) |
3. Key Application Scenarios
Widely deployed in gas transmission pipelines, new energy battery cooling systems, small chemical reactor lines, HVAC boiler safety shut‑off, commercial water purifiers, smart greenhouse irrigation, laboratory micro‑dosing reagent lines, wastewater emergency cut‑off, and small steam heat exchange equipment.
4. Industrial Project Case Study
A lithium battery energy storage park in Linyi, Shandong, adopted the motorized ball valve auto return across its cooling pipeline system. Under high‑temperature battery operation, any plant‑wide power outage would trigger the valves to automatically cut off the cooling water circuit, preventing the risk of battery overheating and fire. The project selected the SS304 stainless steel 2‑wire auto‑reset model, compatible with ethylene‑glycol coolant. Over a full year of service, no leakage or safety incidents occurred, fully meeting the park’s ESD emergency shutdown requirements.
5. Selection & Core Advantages
Compared with ordinary non‑reset electric ball valves, the safety benefits are clear: conventional valves maintain their last position upon power failure, which can lead to media overflow or explosion hazards. This auto‑return design achieves line self‑protection without requiring an external UPS. For compact systems, the 2 wire auto return motorized ball valve offers simpler wiring and lower cost.
For chemical and gas high‑risk lines, the spring‑reset fail safe motorized ball valve is recommended for its larger energy reserve and faster response. Body material selection: brass for water and gas, 316 stainless steel for corrosive chemicals, and WCB cast steel for high‑temperature steam and high‑pressure services.
The product carries CE industrial certification and is manufactured in strict compliance with fluid safety valve standards. For overseas engineering contractors and OEMs, we support customisation of size, reset mode, and explosion‑proof actuators, and provide comprehensive wiring diagrams and application‑specific selection manuals to simplify project commissioning.