进口低温蝶阀品牌推荐德国洛

进口低温蝶阀结构特点：

1 基于低温介质易燃易爆的特性，低温蝶阀设计了防火防静电的措施。

2 对于温度高于-50℃,一般不采用长颈结构，对于温度低于-50℃的蝶阀，颈部采用长颈结构。

3 低温蝶阀适用于低温液体贮运设备的管理系统，具有开关灵活、密封可靠的特点，也可用于其他低温和深冷介质的管理系统。

进口低温蝶阀规格参数：

公称通径                DN50～DN500(MM)

公称压力                PN0.6、1.0、1.6MPa

连接方式                对夹式、法兰

驱动形式                电源驱动AC220V、AC380V、DC24V(其它特制)

适用温度                -40℃～196℃

阀体材质                CF8、CF8M、CF3M

密封材质                PEFE、PPL、304、316

控制形式                开关型（开关两位控制）、调节型（定位器4-20mA模拟量控制）

进口低温蝶阀产品优势

1. 转动灵活方便

2. 紧密的金属密封系统

3. 长寿命阀座。通过消除阀座和阀盘密封之间的干扰，可防止阀座和密封破损

4.金属环阀座，自我温度调节

5. 材料选择范围广，包括能抵抗腐蚀的先进合金

6. 防火测试达到API607标准

7.耐低温,-425℉下零泄露

8.阀体符合ASME和MSS标准

防脱出阀轴符合API607标准

9.无干扰，卡死阀座设计

10. 优越的流量控制特性  

11. 阀座密封紧密

12. 零泄露－双向密封  确保紧闭密封

进口低温蝶阀产品简介：

德国洛克《DE LOCKE》进口低温蝶阀专用结构避免阀门泄漏阀门产生内漏主要原因是密封副在低温状态下产生变形所致当介质温度下降到使材料产生相变时造成体积变化，使原本研磨精度很高的密封面产生翘曲变形而造成低温密封不良。进口低温蝶阀把常规的平面密封改为锥面密封。阀座是一个斜圆锥椭圆密封面，与嵌装在蝶板上的正圆形弹性密封环组成密封副。密封环可在蝶板槽内径向浮动。

当阀门关闭时，弹性密封环首先和椭圆密封面的短轴接触，随着阀杆的转动逐渐将密封环向内推，迫使弹性环再和斜圆锥面的长轴接触，最终导致弹性密封环与椭圆密封面全部接触。它的密封是依靠弹性环产生变形而达到的。因此当阀体或蝶板在低温下产生变形时，都会被弹性密封环来吸收补偿，不会产生泄漏和卡死现象。当阀门打开时这一弹性变形立即消失，在启闭过程中基本没有相对磨擦，故使用寿命长。

Germany lok "DE LOCKE" imported special cryogenic butterfly valve structure to avoid the valve leakage valve leakage within the main reason is that sealing pair under low temperature condition caused by deformation produced when the medium temperature drop to make volume change was caused when the phase change material, make originally high sealing surface grinding precision warping deformations caused by poor sealing at low temperature. Imported low temperature butterfly valve to the conventional plane seal into a cone seal. The valve seat is an oblique conical elliptical sealing face, and a circular elastic sealing ring is embedded on the butterfly plate to form a sealing pair. The sealing ring can float radially in the disc groove.

When the valve is closed, the elastic sealing ring first contacts with the short axis of the elliptical sealing surface. As the valve stem rotates, the sealing ring is gradually pushed inward, forcing the elastic ring to contact with the long axis of the inclined conical surface, and finally causing the elastic sealing ring to contact with the elliptical sealing surface completely. Its sealing is achieved by the deformation of the elastic ring. Therefore, when the valve body or butterfly plate is deformed at low temperature, it will be absorbed and compensated by the elastic sealing ring, and there will be no leakage and stuck phenomenon. When the valve is opened, the elastic deformation disappears immediately, and there is basically no relative friction in the opening and closing process, so the service life is long.