I. Product Overview
The encrypted anti-tamper resilient seated gate valve is a high-tech product developed to address issues such as unauthorized operation, water theft, and valve damage in fluid transmission systems (e.g., municipal water, gas, heating pipelines). Based on the traditional resilient seated gate valve, it integrates encryption and anti-tamper technology through specialized structural design and magnetic code control. This ensures that only authorized personnel can operate the valve, effectively preventing unauthorized opening, disassembly, or sabotage, while retaining the advantages of resilient seated gate valves such as zero leakage, corrosion resistance, and low flow resistance.
• Applicable Media: Clean water, wastewater, oil, neutral gases, natural gas
• Temperature Range: ≤120℃ (refer to product technical specifications for material-specific limits)
• Working Pressure: ≤1.6 MPa (PN16) or higher depending on model
• Typical Applications: Residential water inlet terminals, pre-meter gas valves, heating zone metering valves, industrial pipeline control points
II. Core Technology and Operating Principle
1. Encryption and Anti-Tamper System
• Magnetic Code Control: A magnetic-coded lock core is integrated into the top of the stem or actuator. Operation requires a dedicated tool (e.g., magnetic key or coded wrench), preventing unauthorized access via standard tools or forceful opening
• Self-Locking Function: The valve can automatically lock in any open or closed position, preventing accidental rotation or tampering
• One Valve One Key (Optional): Each valve is paired with a unique coded tool, enabling refined management and preventing tool misuse or duplication
2. Resilient Sealing Structure
• Fully Encapsulated Gate: The gate uses ductile iron as a structural core, vulcanized with high-quality rubber (e.g., NBR or EPDM) on both inner and outer surfaces. Elastic deformation compensates for minor deviations between the gate and valve body, achieving zero leakage sealing
• Flat-Bottom Seat: The valve body features a groove-free bottom design to prevent debris (e.g., sand, welding slag) accumulation, ensuring long-term sealing performance
• Triple O-Ring Seal: The stem is sealed with three O-rings, significantly reducing friction and allowing pressure-assisted seal replacement. Environmentally friendly and hygienic
3. Materials and Corrosion Protection
• Body / Bonnet: Made of ductile iron (corrosion-resistant, high strength) or cast steel (for high-pressure applications). Internal and external surfaces are electrostatically coated with non-toxic epoxy resin, offering excellent rust resistance and suitability for drinking water and wastewater systems
• Stem: Stainless steel (e.g., 2Cr13), wear-resistant and corrosion-resistant, ensuring long-term reliable operation
III. Key Features
• Dual Protection: Resilient sealing ensures zero leakage, while encryption and anti-tamper design prevent unauthorized operation—providing comprehensive system safety and resource control
• Ease of Operation: – Once unlocked, operation is smooth with low torque – Compatible with manual, electric, pneumatic, and other actuation methods – Some models support remote monitoring (requires smart actuator), enabling centralized management
• Long Service Life and Low Maintenance: – Rubber seals are wear-resistant and aging-resistant, reducing replacement frequency – Flat-bottom design minimizes clogging by debris, lowering failure rates – Anti-corrosion coating extends valve lifespan, especially in humid or corrosive environments
• Bidirectional Sealing: No need to distinguish flow direction during installation, adaptable to complex pipeline layouts
• Compact Structure: Smaller and lighter than traditional gate valves, saving installation space and cost
• Security Design: Lock housing is made of robust materials (e.g., stainless steel or hardened steel), resistant to prying and forceful disassembly
IV. Main Standards
The valve’s design, manufacturing, and performance comply with the following national and industry standards:
• Design and Manufacturing: – GB/T 12236 (General Valves – Steel Swing Check Valves) – GB/T 12238 (Flanged and Wafer Type Resilient Seated Butterfly Valves) – Proprietary enterprise encryption and anti-tamper technology standards
• Face-to-Face Dimensions: – GB/T 12221 (Metal Valves – Face-to-Face Dimensions), ensuring compatibility with pipeline systems
• Flange Connections: – GB/T 9113 (Integral Steel Pipe Flanges, PN10/PN16) – ASME B16.5 and other international standards
• Inspection and Pressure Testing: – GB/T 13927 (Industrial Valves – Pressure Testing), including strength test (≥1.5×working pressure) and sealing test (≥1.1×working pressure), ensuring zero leakage
• Hygiene Requirements: – GB/T 17219 (Safety Evaluation for Drinking Water Distribution Equipment and Protective Materials) – WRAS, NSF and other international certifications for potable water applications
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