精品人妻人人爽av网址,亚洲区二区三区无码久久,夜夜嗨av一区二区三区,黄色av免费电影一区二区

Triple eccentric butterfly valve

Triple eccentric butterfly valve

Triple eccentric butterfly valve

Dual directional pressure zero leakage, low torque sealing torque, dynamic sealing without locking, dual axis structure resistant to high temperature, high interchangeability and versatility

  • Detail

Stable operation without jamming at ultra-high temperature

Triple eccentric structure

To cope with high temperature conditions, the valve adopts a double short shaft design, which connects the upper and lower shafts to the valve plate, effectively releasing temperature deformation and avoiding through shaft design. Under high temperature, the valve shaft undergoes creep, causing abnormal switching phenomena.

 

A reasonable flow channel design and a turtle back style valve plate are adopted, avoiding the design of reinforcing ribs in the shape of a well, preventing vortex and vibration, making it more suitable for high-temperature structures.

Material selection

ASTM A439 D4 is an austenitic ductile iron material that can withstand temperatures up to 1200 ℃. Especially under high temperature conditions, ASTM A439 D4 not only has the corrosion resistance and heat resistance of stainless steel, but also has the advantages of high strength, high toughness, and good wear resistance of ductile iron, with good impact resistance. Therefore, ASTM A439 D4 is a good choice for making shaft sleeves under high temperature conditions. The ASTM A439 D4 shaft sleeve has also been applied in various high-temperature working conditions and has been verified by actual working conditions.

 

Structural optimization

The connection between the valve body and actuator is made using a raised high-temperature bracket and a concave convex flange structure coupling.

1. The high-temperature bracket effectively isolates the thermal radiation effect of the pipeline medium on the actuator from a spatial distance, and adds insulation pads to the upper and lower planes of the bracket, effectively isolating the pathway of upward conduction of pipeline medium temperature through the bracket.

2. The axial connection adopts the method of connecting with a concave convex flange structure coupling without two upper sections. At the same time, an insulation pad is added to the contact surface of the two couplings, effectively isolating the path of pipeline medium temperature conduction through the valve axial direction and reducing the dead zone range of the regulating valve.

The above two measures have solved the problem of general actuators not being able to withstand high temperatures (high-temperature actuators can withstand temperatures of -20-150 ℃), improved the stability and service life of actuators, and this connection is suitable for use in high-temperature working conditions.

秋霞鲁丝片无码一区二区| 大乳大屁股videos| 好大好粗啊啊啊啊好爽啊| 浓精揉捏奶h女友| 国产成人无码18禁午夜| 狠狠爱五月丁香亚洲综合| 中文在线无码高潮潮喷| 日韩 av 在线 电影| A久久久久免费大片毛片| 亚洲日本aⅤ片在线观看| 丁香五月六月啪| 久久精品毛片| 深夜福利丝袜美腿精品一区| 成人女人爽到高潮的a片| 久久亚洲国产成人影院av| 奇米777米影视第4色| 被黑人中出美女在线观看| 你懂的欧美视频在线观看| 日本美女操大逼| 哈啊~嗯啊插我咿呀视频| 欧美性生交18xxxxx无码| 美女视频在线观看草草草| 丁香婷婷激情综合五月激情| 风韵多水老熟妇视频一区| 女大乳黄啪啪啪| 操进美女的骚逼| aaaaaaa黑人欧美| 飘花影院午夜片理论片| 特级做A爱片毛片免费看| 国产高潮又爽又刺激视频| 用肉棒艹我在线观看视频| 黑人操日本美女| 国产日韩一区二区东京热| 成 人 色综合 综合网站| 人妻系列无a v码专区| 大鸡巴猛插小穴在线观看| 日本亚洲精品资源在线观看| 鸡吧捅鸡鸡视频在线观看| 欧美乱妇狂野欧美在线视频| 69堂最新国产在线视频| 男人疯狂日女人小穴视频|