Explore our wide selection of certified gas safety components, including low-voltage controllers, industrial gas detectors, and custom OEM modules.
Founded in 2003, Xinhaosi is one of the most influential and trusted brands in the global gas safety industry. Over the past two decades, we have steadily built a robust and comprehensive production and service system, which integrates cutting-edge R&D, intelligent manufacturing with advanced automation equipment, digital marketing across global channels, professional after-sales support with an experienced technician team, flexible OEM/ODM services, as well as CNAS-Accredited laboratory calibration services that meet international standards.
Our diversified product portfolio covers industrial & residential gas detection & alarm systems, industrial & household gas solenoid valves, 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, including oil & gas exploration and production, petrochemicals, urban gas distribution, automotive manufacturing, pharmaceuticals, new energy, steel production, and beverage processing.
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.
Adhering to ISO9001 quality management system standards, Xinhaosi's core products have obtained a full range of authoritative certifications, including national compulsory Products Certification, explosion-proof certification, fire product certification, CPA measurement instrument type approval certificate, and international approvals such as CE and SIL. Additionally, Xinhaosi holds honors such as "National Quality Integrity Benchmark Enterprise" and "National Quality Leading Enterprise in the Gas Alarm Industry," is a member of the China Fire Protection Association, and serves as the main drafting organization for the national standard of solenoid valves.
In the field of intellectual property, Xinhaosi has built a robust innovation system with over 50 patents and software copyrights. These patents cover core technological areas, including a graphical monitoring system for gas detection and alarm, which enables predictive maintenance based on historical data to reduce equipment failure rates by over 30%, and a solenoid valve with flow monitoring functionality that integrates flow detection and alarm capabilities. The company also pioneered China's first networked bus-type gas leakage monitoring system, demonstrating its leading position in cutting-edge technological research.
Our in-house laboratory is accredited by the China National Accreditation Service for Conformity Assessment (CNAS), recognized both domestically and internationally under the ILAC-MRA framework. It operates in accordance with ISO/IEC 17025, the international standard for testing and calibration laboratories. It provides reliable and traceable testing services for gas detection and alarm products, solenoid valves, and related safety equipment. Test reports issued by the CNAS-accredited laboratory are widely accepted by regulatory authorities, certification bodies, and customers in China and overseas, helping to ensure product quality, safety compliance, and market access.
A comprehensive overview of nominal dimensions, flow calculations, and international regulatory cross-references for industrial engineers.
In pipeline systems, sizing a gas valve correctly is paramount to maintaining structural safety, ensuring correct pressure drop, and preventing leakage. Standard terminology refers to NPS (Nominal Pipe Size) in North America and DN (Diameter Nominal) in European and international systems. Underestimating the required valve size leads to choked flow, excessive gas velocity, and pressure drops that can impair industrial burners, regulators, and HVAC systems. Overestimating size leads to valve seat wear, control hunting, and unnecessary installation costs.
Gas valve flow calculations rely heavily on the Flow Coefficient (Cv or Kv), which dictates the rate of flow (in GPM or m³/h) of a medium through the valve at a specified pressure drop. Our manufacturing facility designs and calibrates valves to meet precise Cv/Kv values across all major metric and imperial pipe sizes, satisfying both high-flow requirements and rapid-shutoff protocols.
Global operations require compatibility across multiple piping standards. The table below represents the standardized correlation values for gas solenoid valves and emergency shutoff valves produced in our Deyang smart facility.
| Nominal Size (ANSI - Inches) | Nominal Diameter (DN - mm) | Thread/Flange Rating Options | Standard Flow Coefficient (Cv) Range | Primary Application Areas |
|---|---|---|---|---|
| 1/2" | DN15 | NPT, BSPT, Flanged PN16 | 1.2 - 2.5 | Residential boilers, smart domestic shut-off lines |
| 3/4" | DN20 | NPT, BSPT, Flanged PN16 | 3.0 - 5.5 | Commercial kitchens, light industrial burner feeds |
| 1" | DN25 | Flanged ANSI 150#, PN16 | 6.5 - 12.0 | District heating stations, intermediate gas lines |
| 1-1/2" | DN40 | Flanged ANSI 150#, PN16/40 | 15.0 - 28.0 | Industrial kilns, boiler rooms, HVAC loops |
| 2" | DN50 | Flanged ANSI 150# / 300#, PN16 | 30.0 - 45.0 | Main distribution manifolds, chemical plant feeds |
| 3" | DN80 | Flanged ANSI 300#, PN16/25/40 | 70.0 - 110.0 | Petrochemical processing, heavy duty furnaces |
| 4" | DN100 | Flanged ANSI 300#, PN16/25/40 | 130.0 - 190.0 | Urban gas gate stations, transmission pipeline manifolds |
Gas valve size criteria shift dramatically based on environmental conditions and localized codes:
Why Xinhaosi's vertically integrated supply chain in Sichuan delivers unmatched cost, quality, and lead-time advantages.
Our newly established Deyang manufacturing complex represents a major leap in production capability. By integrating advanced casting facilities, CNC high-precision machining centers, and automated assembly loops, Xinhaosi exerts complete control over the gas valve manufacturing lifecycle. This reduces lead times for complex, custom valve sizes by up to 40% compared to traditional OEM suppliers.
We leverage local, highly-developed raw material supply networks for copper, brass, and stainless steel in Sichuan. This guarantees stable pricing and high resilience against global market fluctuations, ensuring that volume commitments are honored without interruption.
Unlike standard factories, every production batch of Xinhaosi valves and detectors is validated in our CNAS-Accredited testing laboratory. This ensures that wall thickness, thread accuracy, and pressure containment meet global benchmarks including CE, SIL, and national fire safety requirements. Our testing processes simulate extreme ambient temperatures and cycle stress, ensuring reliability over decades of service.
Tracing our path from a safety products startup to a global leader in AI-driven gas safety technology.
● Established on April 17th, 2003.
● Launched the 1st generation of gas leak alarm and fire fighting products, laying the foundation for our safety-oriented brand ethos.
● Started dedicated gas safety valve production lines.
● Expanded OEM business for global safety brands.
● Relocated headquarters and R&D divisions to the Longtan Industrial Park office building.
● Achieved milestone of 10 million units of gas detectors sold.
● Relocated manufacturing base to the state-of-the-art Chengdu factory facility.
● Established a comprehensive sales and after-sales support network across China.
● Rolled out innovative fire power monitoring systems.
● Self-developed IoT Platform launched for remote monitoring.
● Introduced automatic fire alarms, emergency lighting, and evacuation systems.
● Formally recognized as a National High-Tech Enterprise.
● Became an official qualified vendor for China's top 5 gas suppliers.
● Commenced construction on the Deyang smart manufacturing base.
● Formed the Petrochemical and International Business Division to drive export growth.
● Awarded the prestigious Sichuan Provincial Technology Center title.
● Deyang smart factory reached full operation.
● Rolled out intelligent urban pipeline network monitoring lines.
● Released wireless detection products and next-generation AI-enabled safety solenoid valves.
Navigating global compliance standards can be complex for engineering and procurement departments. Xinhaosi simplifies this by manufacturing products conforming to EN 161, ANSI Z21.21, and AS 4617. Our technical teams assist with design integration, layout consulting, and custom flange drillings (JIS, ANSI, and DIN) to ensure seamless installation into localized distribution systems.
Whether you require standard BSPT threads for European regions or custom NPT threads for the Americas, our automated machining lines adapt to customer requests without compromising manufacturing lead times.
Modern commercial infrastructure demands real-time oversight. Our wireless intelligent terminals, including the GT-AT0636 and smart pressure monitors like the AT0635, communicate directly with valve safety systems. Utilizing LoraWAN, NB-IoT, and 4G networks, these systems provide real-time pressure, flow, and safety status to remote platforms, enabling rapid shut-off and predictive maintenance.
Detailed engineering answers to the most common queries regarding industrial gas valve sizing and manufacturing standards.
A1: Industrial sizing requires calculating the total gas flow capacity (in SCFH or m³/h) under the lowest operating inlet pressure. You must cross-reference this flow rate with the valve's Flow Coefficient (Cv/Kv) to ensure the pressure drop across the valve remains within allowable safety thresholds. Selecting a valve purely based on pipeline diameter can result in improper control and system instability.
A2: ANSI (Nominal Pipe Size - NPS) is measured in inches and is typical in North American systems, whereas DN (Diameter Nominal) is the metric equivalent used in European and international ISO-based pipeline layouts. Our factories accommodate both standards, offering flanged connections according to ANSI B16.5 and EN 1092 standards.
A3: Since combustible gas lines present high hazard potential, any electrical component (like the solenoid actuator) must be enclosed to prevent sparks from igniting surrounding atmosphere. Xinhaosi’s explosion-proof series, like the GTYQ-AT0505, carry rigorous international certifications for Zone 1 and Zone 2 safety applications.
A4: Yes, we provide full OEM and ODM customization services. We configure thread forms (NPT, BSPT, BSPP), flanged dimensions, body materials (aluminum alloy, brass, stainless steel), and voltage options for our global customer base.
A5: Our safety valves utilize rapid-acting electromagnetic triggers that trip and close the valve within 1 second. Once shut, they require manual resetting to ensure operations only resume after safety inspections, adhering to safety integrity level (SIL) protocols.
Enhance system reliability with our specialized wireless terminals, smart pressure sensors, and digital control panels.
