描述
1.产品定位与核心功能
VALM-818394推测为超低温精密调节型阀门定位器，定位液化天然气（LNG）、低温实验室及超导系统，聚焦-200°C极低温工况适配、热胀冷缩补偿算法与微振动抑制。其核心功能包括：
控制性能：
-位置精度：±0.04%（全行程范围内，纳米级分辨率）；
-响应时间：≤15ms（低温介质下稳定响应）。
环境适应性：
-工作温度：-200°C至+100°C（超低温宽温区型）；
-介质兼容性：LNG、LO2、LN₂等液态气体。
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HART、EtherNet/IP、FOUNDATION Fieldbus）；
-输出类型：磁致伸缩驱动+因瓦合金阀杆（热膨胀系数<1.5×10⁻⁶/°C）；
供电要求
-电压范围：24V DC（本质安全防爆认证）；
-功耗：≤8W（峰值），休眠模式<0.08W；
通信接口
-数字总线：OPC UA、Profinet；
-无线扩展：Sub-1GHz工业Mesh网络。
3.功能特性
超低温密封与材料体系：
-核心材料：6%镍低温钢（ASTM A353 Grade 3）+PCTFE密封圈（耐冷流）；
-结构设计：双层真空隔热阀体（热传导损失<0.1W/m·K）。
智能控制与补偿：
-热应力预测：基于有限元模型动态修正阀杆位移（误差<±0.01mm）；
-振动抑制：压电陶瓷减振器（抑制低温泵脉动≥20dB）。
安全与诊断：
-泄漏监测：红外热像仪检测绝热层异常温升；
-自检模式：-196°C下自动校准零点漂移。
1.Product positioning and core functions
VALM-818394 is speculated to be an ultra-low temperature precision-regulating valve positioner,which locates liquefied natural gas(LNG),low-temperature laboratories and superconducting systems,focusing on the adaptation of extremely low temperature conditions of-200°C,thermal expansion and contraction compensation algorithm and micro vibration suppression.Its core functions include:
Control performance:
-Position accuracy:±0.04%(within the entire stroke range,nano-scale resolution);
-Response time:≤15ms(stable response under low temperature medium).
Environmental adaptability:
-Operating temperature:-200°C to+100°C(ultra-low temperature wide temperature zone type);
-Media compatibility:liquid gases such as LNG,LO2,LN₂.
2.Key technical parameters
Project Typical specifications(refer to similar products)
Input/Output
-Input signal:4–20mA DC(supports HART,EtherNet/IP,FOUNDATION Fieldbus);
-Output type:magnetostrictive drive+Inwa alloy stem(thermal expansion coefficient<1.5×10⁻⁶/°C);
Power supply requirements
-Voltage range:24V DC(intrinsically safe explosion-proof certification);
-Power consumption:≤8W(peak),sleep mode<0.08W;
Communication interface
-Digital bus:OPC UA,Profinet;
-Wireless extension:Sub-1GHz industrial Mesh network.
3.Functional characteristics
Ultra-low temperature sealing and material system:
-Core material:6%nickel low temperature steel(ASTM A353 Grade 3)+PCTFE sealing ring(cool flow resistant);
-Structural design:Double-layer vacuum heat-insulated valve body(heat conduction loss<0.1W/m·K).
Intelligent control and compensation:
-Thermal stress prediction:dynamically correct the valve stem displacement based on the finite element model(error<±0.01mm);
-Vibration suppression:Piezoelectric ceramic vibration damper(suppresses pulsation of cryopump≥20dB).
Safety and Diagnosis:
-Leakage monitoring:Infrared thermal imager detects abnormal temperature rise in the insulation layer;
-Self-test mode:Automatic calibration of zero point drift at-196°C.
