Founded in 2003, Xinhaosi has established itself as one of the most influential and reliable brands in the gas safety industry. We provide customer-focused products and services to safeguard the operations of factories, municipal utilities, commercial spaces, and residential homes worldwide.
By utilizing cutting-edge electronic detection technology, we make unknown gas leak risks visible and controllable. Our automated 4-inch solenoid valves stand at the frontline of source protection, integrating directly with gas detector controllers to mitigate threats instantly.
Protecting industrial infrastructure from gas hazards requires more than isolated components. We offer cohesive, full-chain monitoring and automated shutdown arrays.
Precision sensing arrays configured for explosive hazards, toxic leaks, and flame-source localization in complex processing yards.
Compact, highly reliable gas detector controllers and shut-off valves designed for high-density multi-family properties and kitchens.
Protecting networks from the source with automated, fast-response DN100 (4-inch) emergency shut-off valves built to handle critical flow loads.
Low-latency telemetry nodes and high-performance valves optimizing pressure regulation and leak response in metropolitan networks.
For procurement directors and EPC contractors, selecting a 4-inch (DN100) solenoid valve requires evaluating detailed parameters. In heavy-duty pipeline setups, these valves serve as emergency shut-off elements. The following data table details the manufacturing and performance baselines followed in our OEM factories.
| Parameter / Option | Technical Baseline (DN100 / 4 Inch Valve) | OEM Customization Range |
|---|---|---|
| Valve Body Material | Cast Aluminum Alloy / Carbon Steel (WCB) | Stainless Steel (CF8 / CF8M) for corrosive zones |
| Operation Mode | Normally Open / Auto-closing with Manual Reset | Normally Closed, direct-acting or pilot-operated |
| Seal / Diaphragm | NBR (Nitrile Rubber) | FKM (Viton) for high-temperature chemical media |
| Working Pressure | 0 to 100 kPa / 0 to 6 Bar (High-pressure class) | Up to 16 Bar (PN16 Class) for transmission lines |
| Coil Protection | Flameproof / Explosion-Proof (Ex d IIC T6 Gb) | Intrinsically Safe (Ex ia) option with IP67 enclosure |
| Response Time | < 1.0 second (Emergency Trip) | < 0.5 seconds for critical shut-down lines |
| End Connections | Flanged (ANSI B16.5 / DIN EN 1092-1) | Threaded, custom flange patterns |
Note for Design Engineers: In hazardous commercial boiler rooms and chemical storage locations, a 4-inch solenoid valve must be interlocked with certified gas monitoring control loops. Xinhaosi DN100 valves feature low power consumption coils to prevent overheating during long-term standby operation.
Industrial and municipal gas networks rely heavily on large-diameter pipelines to transport natural gas, liquefied petroleum gas (LPG), and synthetic fuel gases. As pipelines expand to 4-inch (DN100) diameters and beyond, the dynamics of flow control alter dramatically. The pressure drop, flow velocity, and kinetic energy of the media require solenoid valves with high structural integrity and swift response speeds.
Global energy consumption trends indicate a consistent transition toward natural gas as a transition fuel, alongside the deployment of green hydrogen blends. This shift has placed immense pressure on OEM factories to produce valves that can withstand varying chemical compositions and fluctuating operating pressures. A 4-inch solenoid valve functions as the primary emergency barrier; it must offer zero-leakage performance over a lifecycle spanning hundreds of thousands of cycles.
The central challenge of building a 4-inch (DN100) solenoid valve lies in the force balance. In small valves, the magnetic field generated by the solenoid coil is sufficient to lift the plunger directly. However, in a 4-inch line, the pressure of the gas acting across the large seal area generates forces that direct solenoid actuators cannot overcome without consuming excessive power.
To address this, OEM factories utilize pilot-operated mechanisms. In this configuration, the solenoid controls a small pilot port. By venting this port, the line pressure itself is harnessed to lift the main piston or diaphragm. Xinhaosi engineers optimize this pilot path, incorporating self-cleaning internal orifices to prevent clogging from pipe scale or particulate matter, ensuring reliability even in harsh, unfiltered fuel lines.
Solenoid valves installed in gas pipelines operate in zones where explosive gas mixtures may accumulate. Consequently, the electrical coil of the valve must be designed to prevent ignition. Our OEM manufacturing lines produce coils certified under various standard frameworks, including China's GB3836 standards and international explosion-proof benchmarks like ATEX and IECEx (e.g., Ex d IIC T6 Gb).
By utilizing heavy, flameproof enclosures, any internal spark or explosion is contained within the coil housing, preventing it from igniting the surrounding atmosphere. Furthermore, compliance with localized pressure equipment regulations (such as the EU’s PED or ASME codes in North America) guarantees that the structural pressure-containing envelope remains robust under cyclic stress.
Our DN100 (4-inch) valves are deployed across diverse applications:
The future of pipeline safety lies in integration. Tomorrow’s 4-inch solenoid valves will not simply open and close; they will report their status in real-time. By embedding pressure sensors, temperature sensors, and position feedback switches directly into the valve body, operators can monitor pipeline health.
Integrating valve diagnostics with intelligent edge gateways (like our OEM FDG-X304SE) enables predictive maintenance. By tracking coil resistance, temperature changes, and mechanical actuation speed, the system can flag wear before a valve failure occurs.
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