The SSDJ-FZ-F/C-RQZ series gas safety shut-off valve is a precision-engineered safety component designed for critical gas transmission and distribution systems. It provides advanced monitoring and automatic cut-off functions to protect against over-pressure or pressure loss, utilizing the internal pipe network pressure to operate without the need for external power sources. This ensures an immediate and reliable response to system failures, safeguarding infrastructure and personnel from potential hazards.
Engineered for versatility and durability, this series is compatible with natural gas, coal gas, LPG, and other non-corrosive gases. Featuring a sophisticated fifth-generation cut-off mechanism, it separates the cut-off membrane from the sliding mechanism to achieve high response sensitivity. Whether operating in clean or dirty gas mediums, the SSDJ-FZ series guarantees high-precision operation and rapid closure, making it an essential safety barrier for industrial and commercial gas applications.
Detailed Parameters
| Working Pressure Range | ≤ 6.4MPa | Operating Pressure Range | 0.005MPa - 1.6MPa |
|---|---|---|---|
| Operating Temperature | -20°C to +60°C | Response Time | ≤ 1 second |
| Cutting Accuracy | AG 2.5 | Available Sizes | DN50, DN80, DN100, DN150, DN200, DN250, DN300 |
| Connection Mode | Flange Connect PN1.6MPa | Standard Compliance | HG/T20592-2009 |
| Applicable Medium | Natural Gas, LPG, Coal Gas | Reset Type | Manual Reset |
Key Advantages
Self-Powered Safety
Utilizes existing pipe network pressure for operation, eliminating the need for electricity and ensuring reliability during power outages.
Rapid Response
Achieves a critical response time of ≤ 1s, cutting off the gas source instantly when over-pressure is detected.
High-Precision Cut-off
Features an AG2.5 accuracy rating and a 5th generation trip brake release mechanism for pinpoint operational control.
Dirty Gas Compatibility
Specially designed to maintain normal operation and high reliability even when working in contaminated or dirty gas mediums.
Easy Maintenance
Simplified installation and debugging process with a design focused on ease of operation and routine maintenance.
Robust Construction
Built with high-strength, corrosion-resistant materials to withstand harsh industrial environments and high pressures.
Product Gallery
Management Platforms
Inventory Control
Efficiently manage your valve stock levels and specifications across multiple warehouses.
Pressure Monitoring
Integrate with control systems to monitor real-time pressure thresholds and valve status.
Safety Alerts
Receive instant notifications when a safety cut-off event is triggered in the pipeline.
Maintenance Scheduling
Automated reminders for periodic inspection and testing as per ASME and NFPA codes.
Asset Tracking
Track every valve by serial number to ensure full traceability and compliance documentation.
Remote Diagnostics
Utilize electronic position sensors for remote verification of valve open/closed status.
Investment Return Comparison
| Feature | Standard Valves | SSDJ-FZ Series |
|---|---|---|
| Power Req. | External Electricity | Self-Powered (Pipe Pressure) |
| Response Speed | Variable/Slow | Ultra-Fast (≤ 1s) |
| Medium Tolerance | Clean Gas Only | Clean & Dirty Gas Mediums |
| Safety Risk | Higher failure risk | Redundant Safety Mechanism |
| OpEx Cost | High (Energy/Wiring) | Low (Passive Operation) |
Frequently Asked Questions
Q: How can I tell if the gas safety shut-off valve is open or closed?
Visual indicators are the primary method. For ball valves, the handle parallel to the pipe is open, while perpendicular is closed. For industrial valves like the SSDJ series, you can check the rising stem position or utilize integrated pressure gauges to compare upstream and downstream pressure.
Q: What makes the SSDJ-FZ series different from standard shut-off valves?
The SSDJ-FZ series uses a 5th generation cut-off mechanism where the membrane and sliding mechanism are separated. This allows for significantly higher response sensitivity and the ability to function reliably in dirty gas environments without external power.
Q: Which gases are compatible with this safety valve?
The valve is designed for non-corrosive gases, including natural gas, liquefied petroleum gas (LPG), and coal gas, making it suitable for a wide range of industrial and commercial applications.
Q: Does this valve require electricity to trigger the cut-off?
No. The SSDJ-FZ series is a passive safety device that utilizes the pressure of the pipe network itself to trigger the shut-off mechanism, ensuring the system remains protected even during a total power failure.
Q: How often should the gas safety shut-off valve be tested?
Regular testing is essential. Following NFPA or ASME codes, we recommend periodic inspections to ensure the valve is free from corrosion and mechanical wear, ensuring the trip mechanism remains responsive.
Q: What is the reset process after the valve has tripped?
The SSDJ-FZ series features a manual reset function. Once the cause of the over-pressure or pressure loss has been identified and rectified, an operator must manually reset the valve to resume gas flow.
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