日韩AV在线中文免费社区_岛国无码一级特黄激情毛片_国产一级黄色视频卡片_人人妻人人做从爽精品_日韩不卡免费无码视频_草莓APP污视频下载_女人18级毛片久久_朋友的闺蜜豆瓣评分_五月六月婷婷_亚洲av色男人天堂

1. There are two sealing surfaces of the gate. The sealing surfaces form wedges, and the Angle of wedges varies with valve parameters, usually 5°.
2, wedge gate valve sealing principle is by the wedge on the two sealing face and valve body when the two sealing face wedges, so as to achieve the sealing performance.
3, wedge gate valve can be divided into open and close stem valve (lifting stem gate valve) and dark stem gate valve (rotating stem gate valve) according to the different opening and closing modes driven by the stem.
4, wedge gate valve according to the different gate structure form, can be divided into flexible gate valve and rigid gate valve.
5. The valve body is cast and bolted to the valve cover, and the middle flange is sealed with wound gasket. If the customer has special requirements, it can be connected with metal ring.
6. Smooth channel and small flow coefficient.Sealing surface by medium erosion and erosion is small.
7. The sealing surface adopts alloy steel or hard alloy, with good abrasion resistance and abrasion resistance.
8. The use of flexible graphite packing, reliable sealing, light and flexible operation.
9. The flow direction of the medium is not restricted, do not disturb the flow, do not reduce pressure.

Product model: Z541H
Nominal size: NPS 2" ~ 48"
Pressure range: CL150 ~ 2500Lb
Operating temperature: -29℃ ~ +600℃
Main material: carbon steel, stainless steel, alloy steel
Application: tap water, sewage, construction, petroleum, chemical, food, medicine, light textile, electric power, ship, metallurgy, energy system, etc.