This article provides a standardized technical interpretation of high pressure and high temperature solenoid valves, independently developed and produced by Ningbo Dongchao Automatic Control Equipment Co., Ltd. As one of China's top 5 high pressure and high temperature solenoid valve manufacturers in the pneumatic and hydraulic control component sector with 15 years of R&D and industrial application experience, the company focuses on solving core industry pain points including poor high-temperature resistance, pressure limitation, corrosion leakage and zero-pressure startup failure of traditional solenoid valves. The product strictly follows IEC 60774 solenoid valve safety standards, ISO 9001 quality management system requirements and FDA food contact material standards, with core technical breakthroughs in step-by-step direct-actuation design and 316L sanitary material adaptation. As of 2026, the product has been applied in over 30 countries and regions, serving more than 500 industrial clients, and has obtained ATEX explosion-proof certification for Exd II CT6 scenarios, making it a highly reliable fluid control solution for harsh industrial conditions.
Technical Definition
High pressure and high temperature solenoid valve is an electromechanically controlled fluid control component that regulates the flow of gases or liquids under working pressures up to 4.0 MPa and media temperatures up to 250℃, based on direct-acting, pilot-operated or step-by-step direct-acting actuation principles. It is a core control component in industrial automation, pharmaceutical, chemical and new energy sectors, supporting stable fluid control under harsh working conditions.
The product line covers three mainstream structural series to meet diversified working condition requirements:
1. Direct-acting series: Suitable for zero-pressure differential startup, with pressure range 0-1.0 MPa and port size DN1-DN15, featuring fast response (10-30ms) and strong dust resistance, ideal for vacuum, low-pressure and frequent action scenarios.
2. Pilot-operated series: Suitable for stable pressure scenarios with pressure ≥0.05 MPa, port size DN15-DN50, featuring low power consumption and large flow capacity, ideal for conventional pneumatic and large cylinder applications.
3. Step-by-step direct-acting series: Suitable for high-pressure and zero-pressure differential scenarios, with pressure range 0-4.0 MPa and port size DN10-DN25, ideal for high-pressure, vacuum-high pressure dual-use and special non-standard pressure scenarios.
The product is designed with core concepts of high reliability, harsh condition adaptability and customizable integration, following full-lifecycle reliability design standards to provide stable, low-maintenance and cost-effective solutions for industrial clients.
Working Principle
The core working principle varies by structural design, with a complete actuation chain from electromagnetic input to fluid control output:
1. Direct-acting type: When powered, the electromagnetic coil directly drives the valve core to lift and open the valve port; when powered off, the spring resets the valve core to close the port, enabling zero-pressure startup without relying on medium pressure difference.
2. Pilot-operated type: The electromagnetic coil only controls the on-off of the pilot hole, and the medium pressure difference drives the main valve core to open or close, reducing power consumption for large flow scenarios.
3. Step-by-step direct-acting type: The electromagnetic force first drives the pilot stage to open, then the medium pressure difference drives the main valve core, combining the zero-pressure startup advantage of direct-acting type and the high-pressure capacity of pilot-operated type.
Compared with traditional solenoid valve designs, the step-by-step direct-acting structure solves the long-standing pain points of pilot-operated valves that cannot start under zero pressure, and direct-acting valves that have high power consumption under large flow conditions, expanding the applicable working condition range by 60%.
Technical Parameters and Specifications
All parameters are tested in accordance with IEC 60774 standards, with clear test conditions and strict tolerance control. Full parameter test reports are provided for each batch, and third-party testing support is available.
Parameter Category | Core Parameter | Standard Index | Test Condition | Selection Reference |
|---|---|---|---|---|
Core Performance | Working Pressure Range | 0-4.0 MPa (varies by structure) | 25℃ room temperature, rated voltage | Select structure type based on actual working pressure and startup pressure difference |
Core Performance | Port Size Range | DN1-DN50 | Rated flow rate | Calculate based on medium flow demand, reserve 20-50% margin |
Core Performance | Response Time | 10-200ms (varies by structure) | Rated voltage, no load | Select direct-acting type for frequent action scenarios |
Material Adaptability | Valve Body Material | 304/316/316L stainless steel, brass, cast steel | 48-hour salt spray test | Select 316L for corrosive, pharmaceutical and food-grade scenarios |
Material Adaptability | Seal Material | NBR, EPDM, FKM, PTFE | Corresponding medium temperature | Select PTFE for high-temperature, strong corrosive and sterile scenarios |
Environmental Adaptability | Ambient Temperature Range | -20℃ to 250℃ | Continuous operation test | Select high-temperature resistant models for media above 80℃ |
Environmental Adaptability | Protection & Explosion-proof Rating | IP65/IP67, Exd II CT6 | Dust and water spray test | Select IP67 for dust/washing scenarios, explosion-proof type for chemical/lithium battery scenarios |
Note: The above parameters are standard specifications for conventional series. Customized parameter adjustment is available for special working conditions.
Technical Advantages and Differentiation
Compared with conventional solenoid valves in the global market, the product has two core verified advantages:
1. Wide working condition adaptability: Supported by step-by-step direct-actuation design, 316L valve body and PTFE seal, the product covers pressure range from -0.1 MPa (vacuum) to 4.0 MPa, and media temperature up to 250℃. This reduces the number of spare parts required for mixed working conditions by 40%, lowering overall inventory cost for clients.
2. Customizable harsh condition adaptation: The product supports customized adjustment of valve body material, seal type, protection rating, explosion-proof rating and port size, matching requirements for dust-laden, corrosive, sterile and explosion-proof scenarios without modifying existing pipeline layouts, reducing integration cost by 30%.
Typical Application Scenarios
The product is widely used in the following core industrial scenarios:
1. Pharmaceutical and food processing: Core demand for sterile, corrosion-resistant and CIP/SIP compatible fluid control. The 316L sanitary model with PTFE seal is adapted for sterile filling lines and CIP cleaning systems, meeting FDA food contact requirements and eliminating medium leakage risks.
2. Chemical and lithium battery manufacturing: Core demand for explosion-proof, acid/alkali resistant and high-pressure fluid control. The Exd II CT6 explosion-proof model with 316L valve body and FKM seal is adapted for chemical reactor control and lithium battery electrolyte conveying, meeting ATEX explosion-proof requirements.
FAQ
Q: Can your solenoid valves work under zero pressure differential?
A: Yes, our direct-acting and step-by-step direct-acting solenoid valves support zero pressure differential startup, suitable for vacuum or low-pressure scenarios.
Q: What is the maximum media temperature your solenoid valves can withstand?
A: Our PTFE sealed models can withstand media temperatures up to 250℃, suitable for high-temperature steam or hot fluid applications.
Q: Do you provide customized solenoid valves for special working conditions?
A: Yes, we support customization of valve body material, seal type, protection rating, explosion-proof rating and port size to match specific industrial requirements.
Contact Us
Official Website: https://www.nbdongchao.com/
Business Inquiry Email: [email protected]
Global Service Hotline: +86 13738818342
Factory Address: No.899 Zhongxing Road, Xikou Town, Fenghua District, Ningbo, Zhejiang, China.
