Explore our premium select range of gas detection controllers, explosion-proof units, and industrial solenoid valves designed to comply with global structural parameters.
A Global Standard Bearer in Industrial Safety, Combustible Gas Control, & Intelligent Systems Integration
Founded in 2003, Xinhaosi has risen to become one of the most influential and trusted brands in the global gas safety and control valve industry. Over the past two decades, we have built a robust and comprehensive production ecosystem. Our platform seamlessly integrates cutting-edge R&D with intelligent manufacturing processes, leveraging advanced automation and digital execution models.
Our diversified product portfolio covers industrial & residential gas detection & alarm systems, industrial & household gas solenoid valves (including specialized 3/4 NPT configurations), and urban gas pipeline network monitoring systems—all engineered to adapt to complex working environments and strict safety requirements. We produce and sell tens of millions of units annually, catering to a wide range of industries that demand reliable gas detection solutions.
Guided by the core mission of “Making Gas Safety Accessible Everywhere,” we consistently deliver high-performance, reliable products and customized solutions tailored to each client’s unique needs. Every item we manufacture undergoes rigorous quality control tests, and every service we provide is backed by our professional technical team, fully embodying our unwavering commitment to safeguarding gas safety across both industrial workplaces and residential environments.
Chengdu Factory & Office
Deyang Factory
Demonstrating decades of industrial gas safety leadership and scale.
Advanced R&D Frameworks and Rigorous International Compliance Standards
Adhering strictly to ISO9001 quality management standards, Xinhaosi's core products have obtained a full range of authoritative certifications. These include the China National Compulsory Product Certification (3C), explosion-proof certification, fire product certification, CPA measurement instrument type approval certificate, and international approvals such as CE and SIL (Safety Integrity Level).
Additionally, Xinhaosi has been recognized as a "National Quality Integrity Benchmark Enterprise" and a "National Quality Leading Enterprise in the Gas Alarm Industry." As a member of the China Fire Protection Association and a main drafting organization for the national standard of solenoid valves, we remain at the forefront of policy, safety regulations, and manufacturing standardizations.
Our in-house calibration and testing laboratory is accredited by the China National Accreditation Service for Conformity Assessment (CNAS), recognized both widely within China and globally under the ILAC-MRA framework. Guided by ISO/IEC 17025 standards, it guarantees that every 3/4 NPT solenoid valve and gas safety monitor undergoes traceable, uncompromising testing routines before distribution.
A comprehensive technical matrix showcasing electrical, structural, and performance variables for global procurement officers.
Within hazardous environments and high-precision gas installations, the selection of the correct connection and control profile is critical. The 3/4 NPT (National Pipe Thread) standard is widely preferred for medium-flow pipelines, providing a secure, tapered seal that minimizes the risk of hazardous gaseous leaks. When evaluating factories and sourcing partners, engineering teams must cross-reference technical thresholds to ensure process safety.
| Technical Parameters | Normally Closed (NC) Valves | Normally Opened (NO) Valves | Explosion-Proof Options |
|---|---|---|---|
| Operating Media | Natural Gas, LPG, Methane, Non-corrosive Gases | Combustible Gases, Coal Gas, Propane | Explosive Gas Atmospheres, Hydrogen Blends |
| Pressure Ranges | 0 - 0.5 MPa (Medium Pressure) | 0 - 0.1 MPa (Low Pressure Shut-off) | High Pressure Custom Specs up to 1.6 MPa |
| Connection Style | 3/4 NPT Female Tapered Thread | 3/4 NPT (ANSI/ASME B1.20.1) | Flanged or 3/4 NPT Options |
| Power Configurations | DC 24V, AC 220V, AC 110V | DC 9V - 12V Pulse Trigger | Intrinsically Safe / Encapsulated Coils |
| Body Materials | Cast Brass / Cast Aluminum Alloy | Forged Brass, Stainless Steel 304/316 | SS316 Heavy Duty Corrosion Resistant |
| Response Time | < 1 Second (Instantaneous Control) | < 0.5 Seconds (Emergency Shut-Off) | < 0.3 Seconds (Safety Standard Compliant) |
Our solenoid valves implement an innovative internal seal structural configuration using specialized synthetic rubbers (NBR/FKM) that resist degradation when exposed to dry and wet methane lines. Designed with anti-vibration features, these valves prevent accidental shut-offs caused by line pulsations or minor ground tremors, resolving a major issue common in residential and commercial infrastructure projects.
How Xinhaosi's dual-base manufacturing framework mitigates global supply chain friction.
In today's volatile economic landscape, procurement managers face significant risks, including logistics bottlenecks, variable metal costs, and sudden component shortages. Xinhaosi addresses these issues through its dual-location production facility system located in Chengdu and Deyang, Sichuan.
Unlike standard assembly workshops that source cheap components from third parties, Xinhaosi manages the entire product lifecycle in-house. From raw brass extrusion, high-precision multi-axis CNC machining of valve blocks, to automatic copper coil winding and final polyurethane potting—every stage is supervised directly. This vertical integration ensures a stable cost basis and helps insulate clients from rapid raw material price shifts.
Our Deyang smart factory operates on a fully digitalized MES framework. Every batch of 3/4 NPT solenoid valves is tagged with a unique digital identifier. This allows us to track component batches, temperature variations during casting, coil resistance values, and test parameters back to the specific assembly line. If field issues ever occur, we can rapidly identify the root cause within minutes, drastically reducing customer liability.
Aligning valve hardware engineering with complex multi-domain environments.
A standard solenoid valve is not universally applicable. Different industrial applications require distinct safety features. Below, we examine the typical operational conditions and requirements for key sectors:
Requires robust explosion-proof capabilities (Ex d IIC T6). The 3/4 NPT solenoid valves used here must withstand corrosive salty atmospheres, outdoor weathering, and operate reliably during sudden voltage drops on remote networks.
Requires rapid closure times (under 1 second). These valves are connected to household gas leak alarms (such as our JT-AT2007 series). In the event of a gas leak, the controller triggers a pulse signal to shut off the gas flow, protecting lives and property.
Demands low-power configurations and long-term durability. Often buried underground or housed in localized cabinets, these valves must remain open for years without coil failure, yet close instantly during line ruptures or seismic events.
When sourcing 3/4 NPT solenoid valves from China factories, procurement directors should verify the following capabilities:
Analyzing the shift towards smart valves and alternative fuel compatibility.
The flow control sector is undergoing significant change driven by digital transformation and the energy transition. At Xinhaosi, we are steering our R&D efforts to address these industry shifts:
Traditionally, solenoid valves act as binary execution components—either completely open or closed. Our upcoming product roadmap includes AI-integrated safety valves. These systems incorporate micro-flow and differential pressure sensors within the valve housing. By tracking pressure changes in real time, the valve can identify micro-leaks downstream and signal an alert before the main gas alarm detects ambient gas. This predictive safety approach helps reduce overall system risk.
As the energy sector moves toward decarbonization, gas utility networks are increasingly testing hydrogen-blended natural gas. Hydrogen molecules are significantly smaller than methane molecules, increasing the risk of leakage and embrittlement in standard materials. Our technical roadmap focuses on developing specialized elastomer compounds and surface treatments for stainless steel bodies to ensure zero leakage in high-pressure hydrogen applications.
Over two decades of safety engineering innovation and market leadership.
The Start-Up Phase
Initial Scale Achievement
Rapid Market Growth
Technology Leadership
Steady Infrastructure Development
Embracing the Future
Answering crucial technical questions and design queries from engineers and global sourcing directors.
A Normally Open (NO) valve remains in an open flow state through physical spring action without needing power. It closes only when it receives an electrical signal, typically a short DC pulse from a gas detector. This is standard for emergency kitchen and utility line safety. A Normally Closed (NC) valve requires continuous electrical power to stay open. It shuts off automatically if power is lost, making it ideal for systems where failsafe closure during power outages is required.
NPT (National Pipe Thread) features a 60° thread angle and a 1° 47" taper. This design creates a metal-to-metal seal by wedging the threads together, requiring thread sealant to ensure zero-leak gas performance. It is the dominant engineering standard in North America and related industrial supply chains. In contrast, BSP threads feature a 55° angle. Splicing or mismatching the two can lead to cross-threading and dangerous gas leaks.
For hazardous environments containing combustible gases (Zone 1 and Zone 2), solenoid valves must feature certified explosion protection, such as ATEX (Europe), IECEx (Global), or national equivalents. Additionally, systems requiring high reliability should have SIL 2 or SIL 3 (Safety Integrity Level) certificates. These certifications verify the probability of failure on demand, ensuring the valve functions correctly during critical shut-off events.
Xinhaosi provides comprehensive OEM and ODM services. This includes modifying electrical coil voltages, custom threads (NPT, BSP, or Metric), specialized body materials (such as SS316 for offshore oil applications), and custom packaging or labeling. All designs are validated in our CNAS-accredited laboratory to ensure they meet the specific performance requirements of your local market before mass production.
Complete your instrumentation setup with certified gas transmitters, controllers, and industrial valves.
