描述
1.产品定位与核心功能
VALM-818407推测为超低温智能阀门定位器，定位LNG储运、空分设备及科研低温系统，聚焦-196°C极低温工况适配、零泄漏密封设计与热应力补偿。其核心功能包括：
控制性能：
-位置精度：±0.02%（全行程范围内，抗低温介质冷缩形变）；
-响应时间：≤8ms（液氮环境稳定响应）。
环境适应性：
-温度范围：-196°C至+80°C（兼容液氮、液氩等介质）；
-压力范围：0–10MPa（超低温动态平衡）。
2.关键技术参数
项目典型规格（参考同类产品）
输入/输出
-输入信号：4–20mA DC（支持EtherCAT、POWERLINK）；
-输出类型：奥氏体不锈钢316L阀体+低温级PTFE阀座（马氏体相变补偿冷缩）；
供电要求
-电压范围：24V DC（防爆认证Ex ia IIIC T6）；
-功耗：≤6W（峰值），休眠模式0.01W；
通信接口
-数字总线：OPC UA、Modbus TCP/IP；
-无线扩展：Sub-1GHz（超低温环境抗干扰通信）。
3.功能特性
超低温材料体系：
-核心材料：LN-0.5Ni低温钢（韧脆转变温度<-150°C）+镀银铜焊缝（防止冷焊）；
-密封设计：多层缠绕垫片+氦检漏验证（泄漏率<1×10⁻⁸Pa·m³/s）。
热应力管理：
-结构优化：双金属膨胀节（补偿±50°C温差形变）；
-自加热模块：电阻丝嵌入阀杆（预热时间<3min）。
安全与诊断：
-冻结监测：光纤布拉格光栅检测阀体应变（灵敏度±0.1με）；
-真空兼容：背压阀联锁（防止热失控）。
4.典型应用场景
能源与化工：
-LNG液化厂BOG（蒸发气）控制阀（耐-162°C甲烷）；
-液氢储罐进出阀（兼容NASA低温标准）。
工业与科研：
-空分装置氩气调节阀（抗氧氮低温腐蚀）；
-超导实验室液氦阀（耐1.5K极端低温）。
1.Product positioning and core functions
VALM-818407 is speculated to be an ultra-low temperature intelligent valve positioner,which locates LNG storage and transportation,air separation equipment and scientific research low-temperature systems,focusing on the-196°C extremely low temperature operating conditions adaptation,zero leakage seal design and thermal stress compensation.Its core functions include:
Control performance:
-Position accuracy:±0.02%(within the entire stroke range,resisting cold shrinkage and deformation of low-temperature medium);
-Response time:≤8ms(stable response to liquid nitrogen environment).
Environmental adaptability:
-Temperature range:-196°C to+80°C(compatible with liquid nitrogen,liquid argon and other media);
-Pressure range:0–10MPa(ultra-low temperature dynamic equilibrium).
2.Key technical parameters
Project Typical specifications(refer to similar products)
Input/Output
-Input signal:4–20mA DC(supports EtherCAT,POWERLINK);
-Output type:austenitic stainless steel 316L valve body+low temperature PTFE valve seat(martensite phase change compensation cooling);
Power supply requirements
-Voltage range:24V DC(Explosion-proof Certified Ex ia IIIC T6);
-Power consumption:≤6W(peak),sleep mode 0.01W;
Communication interface
-Digital bus:OPC UA,Modbus TCP/IP;
-Wireless expansion:Sub-1GHz(Ultra-low-temperature environment anti-interference communication).
3.Functional characteristics
Ultra-low temperature material system:
-Core materials:LN-0.5Ni low-temperature steel(tough and brittle transition temperature<-150°C)+silver-plated copper weld(prevent cold welding);
-Seal design:multi-layer winding gasket+helium leakage detection verification(leakage rate<1×10⁻⁸Pa·m³/s).
Thermal stress management:
-Structural optimization:bimetal expansion joint(compensated for temperature difference deformation of±50°C);
-Self-heating module:Resistor wire is embedded in the valve stem(preheating time<3min).
Safety and Diagnosis:
-Freezing monitoring:fiber Bragg grating detects valve body strain(sensitivity±0.1με);
-Vacuum compatible:Backpressure valve interlock(prevents thermal runaway).
4.Typical application scenarios
Energy and Chemical Industry:
-LNG liquefaction plant BOG(evaporated gas)control valve(resistance to-162°C methane);
-Liquid hydrogen storage tank inlet and outlet valve(compatible with NASA low temperature standard).
Industry and scientific research:
-Argon gas regulating valve for air separation device(anti-oxidation nitrogen low temperature corrosion);
-Superconducting laboratory liquid helium valve(resistant to 1.5K extreme low temperature).
