Chinese Flameproof Solenoid Valve Service Providers Specs Compliance and Use Cases

This article provides a standardized technical interpretation of flameproof solenoid valves, independently developed and produced by Ningbo Dongchao Automatic Control Equipment Co., Ltd. As a professional manufacturer of pneumatic control components with 15 years of R&D and industrial application experience, the company serves customers across 30% of global markets, focusing on reliable fluid control solutions for harsh industrial conditions. Flameproof solenoid valves are designed for industries with explosive gas or dust risks, solving core pain points including unsafe fluid control in hazardous areas, poor corrosion resistance of conventional valves, and inability to adapt to zero differential pressure or high-pressure working conditions. The products strictly follow IEC 60079 explosive atmosphere standards, ISO 9001 quality management requirements, and FDA food contact material standards, with core breakthroughs in integrated explosion-proof and corrosion-resistant design, and flexible non-standard adaptability. Currently, the valves have been verified in applications including chemical manufacturing, lithium battery production, pharmaceutical processing, food production, and environmental protection equipment, with Exd II CT6 and Exia explosion-proof certifications to meet global market access requirements.

Technical Definition

A flameproof solenoid valve is an electromagnetic-driven fluid control component with a specialized explosion-proof enclosure design, which prevents internal ignition of explosive media from spreading to the external hazardous environment. It operates based on the principle of electromagnetic coil actuation to drive core displacement, realizing on-off or directional control of gas, liquid, or other media. As a core component in hazardous area automation systems, it is an indispensable support for industrial upgrading and safe production in explosive environments.

To meet diverse working condition requirements, the product line covers three mainstream structural series, with customizable solutions for special scenarios: 1. Direct-acting flameproof solenoid valves: Positioned for zero differential pressure, frequent action, and small-to-medium flow scenarios, with a pressure range of 0 to 1.0MPa and port size DN1 to DN15, featuring fast response and strong anti-pollution performance.
2. Pilot-operated flameproof solenoid valves: Positioned for medium-to-large flow and stable air source scenarios, with a pressure range of ≥0.05MPa and port size DN15 to DN50, featuring low power consumption and compact volume.
3. Step-by-step direct-acting flameproof solenoid valves: Positioned for high-pressure and zero differential pressure dual-use scenarios, with a pressure range of 0 to 4.0MPa and port size DN10 to DN25, suitable for non-standard special pressure conditions.

The product is designed with the core concept of high reliability, corrosion resistance, and easy integration, adopting CNC precision machining and Parker sealing components to meet full lifecycle reliability requirements for harsh industrial conditions.

Working Principle

The core working principle of the flameproof solenoid valve is electromagnetic actuation, with a complete operation chain as follows: 1. When the coil is energized, it generates a magnetic field that drives the movable core to move, opening or closing the valve orifice to control medium flow.
2. When power is cut off, the spring reset mechanism returns the core to its original position, cutting off or restoring medium flow to realize automatic control.

Core innovative designs include a reinforced flameproof enclosure that meets Exd II CT6 requirements, preventing internal explosion from igniting external hazardous media, and optional stainless steel valve bodies with PTFE or FKM seals to adapt to corrosive media. Compared to conventional non-explosion-proof solenoid valves, this product solves the dual pain points of explosion risk and corrosion failure in harsh environments, while direct-acting and step-by-step direct-acting models support zero differential pressure startup, filling the gap of conventional pilot valves that cannot operate without pressure difference.

Technical Parameters and Specifications

All parameters are tested in accordance with IEC international standards, with clear test conditions and strict tolerance control. Full parameter test reports are available for each batch, supporting third-party authoritative inspection.

Note: The above parameters are for conventional series. Customized parameters and functions are available for special working conditions.

Core Technical Advantages

Compared to conventional solenoid valves in the global market, the product has formed verified competitive advantages through independent R&D and long-term industrial application: 1. Integrated explosion-proof and corrosion resistance: The product meets Exd II CT6 explosion-proof standards, with optional 316L stainless steel valve bodies and PTFE/FKM seals, adopting Parker sealing components. It can adapt to corrosive media with pH 1-14, and operate stably in both hazardous and corrosive environments, reducing the need for multiple valve types and lowering procurement and maintenance costs.
2. Flexible non-standard adaptability: Three structural series cover zero differential pressure, high pressure, and large flow requirements, with a pressure range of 0-4.0MPa and port size DN1-DN50. Customizable parameters including special ports, voltages, and temperature ranges reduce development cycles for non-standard automation scenarios.
3. High reliability and long service life: CNC precision machining and Class H insulation coils support over 10 million operation cycles, reducing equipment downtime and improving production stability.

International Standards and Compliance

All R&D, production and testing processes strictly follow international standards and industry specifications, with a complete compliance system to meet global customer procurement requirements: 1. Core international standards: The product complies with IEC 60079 explosive atmosphere standards, ISO 9001 quality management system requirements, and FDA food contact material standards.
2. Compliance certifications: The product has Exd II CT6 and Exia explosion-proof certifications, and supports RoHS and REACH environmental compliance. 3.1 material test certificates, factory inspection reports, and third-party test reports are available upon request.

Application Scenarios and Selection Guide

Based on 15 years of industry experience and global customer service cases, a step-by-step selection guide is provided to avoid selection errors: 1. Confirm working conditions: Clarify medium type, working pressure range, zero differential pressure requirement, ambient temperature, and explosion-proof requirements first.
2. Select structural type: Choose direct-acting for zero differential pressure and frequent action, pilot-operated for large flow and stable air source, and step-by-step direct-acting for high-pressure dual-use scenarios.
3. Select materials: Choose valve body and seal materials based on medium corrosiveness and temperature, with 316L and PTFE preferred for pharmaceutical and food scenarios.
4. Confirm compliance: Provide required certification documents based on target market and industry regulatory requirements.

Typical application scenarios include: 1. Chemical and lithium battery manufacturing: Meet explosion-proof and corrosion resistance requirements for electrolyte and chemical fluid control, improving production safety.
2. Pharmaceutical and food processing: Meet sterile and CIP/SIP requirements for filling and fluid control, avoiding medium contamination.
3. Industrial automation and environmental protection: Meet high reliability requirements for dust removal equipment and automated production lines, reducing maintenance costs.

FAQ

Q: What explosion-proof ratings do your flameproof solenoid valves support?
A: Our valves support Exd II CT6 and Exia explosion-proof ratings, suitable for Zone 1 and Zone 2 hazardous areas with explosive gas or dust.

Q: Can your flameproof solenoid valves work under zero differential pressure?
A: Yes, our direct-acting and step-by-step direct-acting models support zero differential pressure startup, with a working pressure range of 0 to 4.0MPa.

Q: What materials are available for corrosive media applications?
A: We offer 304, 316 and 316L stainless steel valve bodies, with seal options including NBR, EPDM, FKM and PTFE to adapt to different corrosive media and temperature ranges.

Q: Do you provide customized solutions for non-standard working conditions?
A: Yes, we support customized parameters including special flow rates, port sizes, voltages, temperature ranges and explosion-proof ratings to meet specific application requirements.

Q: What certifications do your products have for global market access?
A: Our products comply with IEC 60079 explosion-proof standards, ISO 9001 quality management requirements, and FDA food contact material standards, with available test reports and material certificates for global customers.

Contact Us

Official Website: https://www.nbdongchao.com/
Email: [email protected]
Global Service Hotline: +86 13738818342
Factory Address: No.899 Zhongxing Road, Xikou Town, Fenghua District, Ningbo, Zhejiang, China