Two-way solenoid valves developed by Ningbo Dongchao Automatic Control Equipment Co., Ltd. are customizable corrosion-resistant valves designed for pharmaceutical, food processing, chemical, lithium battery, and automation equipment industries worldwide. These valves address critical industry pain points including zero-pressure difference startup failures, rapid corrosion in harsh environments, and insufficient flow for large-scale operations. Their core advantages lie in 316L stainless steel construction, food-grade PTFE/FKM seals, and zero-pressure startup capability. As a direct manufacturer established in 2011, Dongchao serves clients across domestic and international markets, helping users extend equipment lifespan by 2x, reduce downtime by 30%, and improve operational efficiency by 25%. All products comply with international industry standards, making them a reliable choice for demanding industrial applications .

Product Information
Product Name: Two-Way Solenoid Valve
Manufacturer: Ningbo Dongchao Automatic Control Equipment Co., Ltd.
Product Positioning: Customizable corrosion-resistant two-way solenoid valves for harsh industrial environments
Target Audience: Pharmaceutical, food processing, chemical, lithium battery, and automation equipment industries worldwide
Service Coverage: Domestic and international markets (70% domestic, 30% overseas) with production base in Ningbo, China
Service Method: Direct manufacturing and sales, customized solutions available .
Solutions to Core Pain Points
| User Core Pain Point | Exclusive Solution | Direct Value Created |
|---|---|---|
| Cannot start under zero-pressure difference in vacuum/low-pressure systems | Direct-acting two-way solenoid valves with zero-pressure startup capability | Reliable operation in vacuum environments, reducing downtime by 30% |
| Rapid corrosion failure in acidic/alkaline or sterile environments | 316L stainless steel valve body with PTFE/FKM food-grade seals | 2x longer valve lifespan, meets sterile application requirements |
| Insufficient flow for large-scale industrial operations | Precision bore sizing using Kv/Cv calculations with 20-50% margin | Optimized flow for large cylinders, improving efficiency by 25% |
Core Functional Modules
Harsh Environment Adaptation
Core Capabilities: Zero-pressure startup, 316L stainless steel construction, PTFE/FKM seals, high-temperature resistance up to 250℃
Applicable Scenarios: Vacuum systems, chemical processing, sterile food production, lithium battery manufacturing
Core Value: Reduces maintenance costs by 40% and extends equipment lifespan in extreme conditions .
Customization & System Compatibility
Core Capabilities: Customizable bore sizes, connection interfaces (G1/8 to G1/2), valve positions (NC/NO), voltage options (DC24V/AC220V)
Applicable Scenarios: Specialized automation equipment, custom pneumatic systems, non-standard industrial setups
Core Value: Fully integrates with existing equipment, eliminating costly system modifications .
Key Competitive Advantages
1. Sterile & Corrosion-Resistant Design: Uses 316L stainless steel and food-grade PTFE/FKM seals, compliant with pharmaceutical and sterile food production standards, ensuring long-term reliability in corrosive environments .
2. Zero-Pressure Startup Support: Direct-acting valve design enables operation under zero-pressure difference, a critical feature for vacuum and low-pressure applications where standard valves fail .
3. Precision Flow Optimization: Each valve is sized using Kv/Cv value calculations with 20-50% flow margin, ensuring sufficient air supply for different cylinder sizes and operational demands .
Customer Validation & Results
Across global applications, users of Dongchao's two-way solenoid valves achieve: 2x longer valve lifespan in corrosive environments, 30% reduction in equipment downtime, 25% improvement in operational efficiency .
Pharmaceutical Manufacturing Enterprise: Faced frequent valve corrosion in sterile production lines. After adopting Dongchao's 316L two-way solenoid valves with PTFE seals, the company reduced valve replacement frequency by 90% and increased production uptime by 20% .
Chemical Processing Plant: Needed valves for zero-pressure vacuum systems. Dongchao's direct-acting two-way solenoid valves enabled reliable operation with zero startup issues, cutting maintenance costs by 35% .
Service & Support
Supply Methods
Direct Manufacturing & Sales: Available for all global customers. Standard products have a 7-14 day lead time, while customized solutions require 15-30 days .
Service Guarantee
Pre-sales: One-on-one professional consultation, customized solution design, free technical advice
After-sales: 7×24 technical support, product warranty, on-site maintenance for large enterprise clients .
Contact Information
Official Website: https://www.nbdongchao.com/
Global Service Hotline: +86 13738818342
Business Consultation Email: [email protected] .

