WhatsApp: +86 16626708626
Email: 
Phone: +86 16626708626Description
- Key Technical Specifications
| Parameter | Specification |
| Model Number | SG15RQ/220T (SG15RQ/220) |
| Nominal Diameter (DN) | DN15 (1/2 Inch Threaded Connection) |
| Operating Voltage | 220 V AC (50/60 Hz) |
| Valve Action | Normally Closed (NC) – Fast Opening / Fast Closing |
| Media Compatibility | Natural Gas, LPG, Town Gas, Non-corrosive Gases |
| Maximum Operating Pressure | 200 mbar (20 kPa) / 360 mbar (depending on coil rating) |
| Body Material | Die-cast Aluminum Alloy |
| Sealing Material | NBR Rubber |
| Ambient Temperature Range | -15°C to +60°C |
| Response Time | < 1 second (Fast Shut-Off) |
| Protection Rating | IP54 / IP65 |
- Product Introduction
The SINON SG15RQ/220T is a high-reliability DN15 industrial gas solenoid valve designed for automatic safety cut-off in gas burner systems, industrial kilns, boiler pipelines, and thermal process lines. Operating on a standard 220 V AC control voltage, the valve remains normally closed when unpowered, ensuring immediate gas line isolation during power interruptions or safety system interlocks.
Constructed with a lightweight die-cast aluminum body and durable synthetic seals, the SG15RQ/220T provides rapid opening and shut-off action under standard distribution pressures. Automation and combustion engineers specify the SG15RQ series for reliable over-pressure protection, flame failure shut-off, and leak detection sequences in automated combustion control panels.
SG 15RQ220T
SG 15RQ220T
- Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
| Valve fails to open when energized | Coil burnt out or control signal under-voltage | ✅ High | Measure voltage across coil terminals; check coil AC resistance with a multimeter | Verify 220 V AC control signal is present. If voltage is correct but coil shows open circuit (∞ Ω), replace the 220V solenoid coil. |
| Gas leakage across closed valve seat | Debris/sediment lodged on the valve seat seal | ✅ High | Isolate gas line, depressurize, and inspect internal seat seal for particulate buildup | Clean the internal valve seat. Install a gas pipeline filter upstream of the valve to prevent particle contamination. |
| Excessive coil humming or overheating | Supply voltage fluctuation or incorrect AC frequency | ✅ High | Measure line voltage under operating load with a true-RMS multimeter | Ensure coil supply remains within ±10% of 220 V AC. Inspect for loose coil securing nuts or physical damage. |
| Delayed or erratic valve actuation | Debris buildup on solenoid plunger or mechanical binding | ✅ High | Disassemble coil assembly unpowered; check plunger movement manually | Clean plunger core tube. Ensure line pressure does not exceed the maximum rated inlet pressure of the valve. |
- Frequently Asked Questions (FAQ)
Q: What does the “DN15” designation mean for the SG15RQ/220T?
A: “DN15” indicates a nominal diameter of 15 mm, which corresponds to standard 1/2-inch female pipe threads (NPT or BSP depending on regional standard) for gas line connection.
Q: Is the /220T suitable for continuous duty cycle operation?
A: Yes. The valve coil is rated for 100% ED continuous duty cycle under specified ambient temperature limits, making it suitable for continuous process heating applications.
Q: Can this valve be installed vertically?
A: The valve can generally be installed in horizontal or vertical pipe runs. However, for maximum operational life and to prevent debris settling on the seal, installing the solenoid coil upright (vertical position above the pipe axis) is recommended.
Q: What is the main difference between the and larger models like the SG25RQ or SG50RQ?
A: The primary difference is physical size and flow capacity. While the uses a DN15 (1/2″) connection, larger models like the SG25RQ (DN25 / 1″) or SG50RQ (DN50 / 2″) are sized for higher volumetric gas flow rates in larger industrial burners.
Q: How is the valve tested before shipment?
A: Each unit undergoes a standard quality control inspection, including a 220V coil resistance and insulation test, a pneumatic seat-leakage pressure test at rated working pressure, and a functional coil actuation test.
