Metso Valm-818402

1.产品定位与核心功能

VALM-818402推测为超低温耐震型阀门定位器,定位液化天然气(LNG)、航天低温推进剂及深冷化工系统,聚焦-200°C极端低温密封、抗机械振动与热应力补偿。其核心功能包括:

控制性能:

-位置精度:±0.04%(全行程范围内,抗低温热滞后);

-响应时间:≤15ms(液态介质下快速调节)。

环境适应性:

-温度范围:-200°C至+150°C(深冷至高温切换);

-介质兼容性:LNG、液氧、液氮、液态甲烷等。

描述

1.产品定位与核心功能

VALM-818402推测为超低温耐震型阀门定位器,定位液化天然气(LNG)、航天低温推进剂及深冷化工系统,聚焦-200°C极端低温密封、抗机械振动与热应力补偿。其核心功能包括:

控制性能:

-位置精度:±0.04%(全行程范围内,抗低温热滞后);

-响应时间:≤15ms(液态介质下快速调节)。

环境适应性:

-温度范围:-200°C至+150°C(深冷至高温切换);

-介质兼容性:LNG、液氧、液氮、液态甲烷等。

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、CC-Link IE);

-输出类型:超低温镍铬奥氏体阀芯+钛合金阀杆(韧脆转变温度<-196°C);

供电要求

-电压范围:12–36V DC(宽压设计,抗电磁干扰);

-功耗:≤9W(峰值),休眠模式<0.03W;

通信接口

-数字总线:SpacePack(航天器控制协议);

-无线扩展:Sub-1GHz(穿透低温绝缘材料信号传输)。

3.功能特性

超低温材料体系:

-核心材料:Inconel 718合金(屈服强度≥1200 MPa -196°C)+石墨烯复合密封;

-绝热设计:多层铝箔+真空绝热层(冷损失<0.5 W/m²)。

动态应力补偿:

-算法集成:基于热-力耦合模型的预扭曲补偿(变形误差<±0.01mm);

-振动抑制:压电陶瓷减振器(衰减幅度≥20dB 50–2000Hz)。

安全与诊断:

-冷泄漏监测:激光干涉仪检测阀体微变形(灵敏度<0.1μm);

-自加热模块:电阻丝+相变材料(快速升温至操作温区)。

1.Product positioning and core functions

VALM-818402 is speculated to be an ultra-low temperature shock-resistant valve positioner,which locates liquefied natural gas(LNG),aerospace cryogenic propellant and deep-cooled chemical system,focusing on-200°C extreme low-temperature sealing,anti-mechanical vibration and thermal stress compensation.Its core functions include:

Control performance:

-Position accuracy:±0.04%(within the entire stroke range,resisting low temperature and thermal hysteresis);

-Response time:≤15ms(rapid adjustment under liquid medium).

Environmental adaptability:

-Temperature range:-200°C to+150°C(switching from deep cooling to high temperature);

-Media compatibility:LNG,liquid oxygen,liquid nitrogen,liquid methane,etc.

2.Key technical parameters

Project Typical specifications(refer to similar products)

Input/Output

-Input signal:4–20mA DC(supports EtherCAT,CC-Link IE);

-Output type:Ultra-low temperature nickel-chromium austenitic valve core+titanium alloy stem(tough and brittle transition temperature<-196°C);

Power supply requirements

-Voltage range:12–36V DC(wide voltage design,anti-electromagnetic interference);

-Power consumption:≤9W(peak),sleep mode<0.03W;

Communication interface

-Digital bus:SpacePack(spacecraft control protocol);

-Wireless expansion:Sub-1GHz(signal transmission through low temperature insulation material).

3.Functional characteristics

Ultra-low temperature material system:

-Core material:Inconel 718 alloy(yield strength≥1200 MPa -196°C)+graphene composite seal;

-Insulation design:Multi-layer aluminum foil+vacuum insulation layer(cold loss<0.5 W/m²).

Dynamic stress compensation:

-Algorithm integration:pre-distortion compensation based on thermal-force coupling model(deformation error<±0.01mm);

-Vibration suppression:Piezoelectric ceramic vibration damper(attenuation amplitude≥20dB 50–2000Hz).

Safety and Diagnosis:

-Cold leak monitoring:laser interferometer detects micro-deformation of the valve body(sensitivity<0.1μm);

-Self-heating module:resistive wire+phase change material(quickly heat up to the operating temperature zone).