The "8" character is a type of pipeline component, mainly for the convenience of maintenance. You can paint the upper half of the "8" character black to determine the specific shape. It's half a blind plate and half an iron ring. Commonly used for pipeline flanges that require process changes, the materials mainly include carbon steel, stainless steel, and alloy, which can be selected based on the pipeline pressure level and pipeline medium.
Item NO.:
XUVAL33-208Lead Time:
30 DaysProduct Orgin:
CHINABrand:
XUVALShipping Port:
ShanghaiMOQ:
100
As the name suggests, the eight shaped blind plate is shaped like an eight shaped blind plate. One end is a blind plate, and the other end is composed of a throttle ring. When transporting fluid, the throttle ring is used, and when cutting off, the blind plate is used, which is somewhat like a shut-off valve. It can be used to cut off when the valve leaks. Its sealing performance is relatively good. For systems that require complete isolation, it is generally chosen as a reliable means of isolation. There should be two shut-off valves before and after the 8-shaped blind plate, and when they are all closed, switch to the 8-shaped blind plate state. Common heat exchangers are put into operation and standby, reactors are put into operation and standby, and nitrogen pipelines and process pipelines are connected. Another characteristic is that the identification is clear and easy to identify its installation status.
The main function of the eight shaped blind plate is to completely isolate it, just like the function of a 100% reliable gate valve that will not be accidentally operated by people.
General purpose:
1. The system type medium pipeline, such as the pipeline for steam blowing and the pipeline for oil type process medium, plays a safe isolation role. In this case, the 8-shaped blind plate should be installed on the side near the system medium pipeline. Of course, for the online disassembly of the 8-shaped blind plate, there should be a gate valve isolation on the side near the process medium pipeline. Such 8-shaped blind plates are generally marked as normally closed.
2. Combustible or toxic medium pipelines entering and exiting the device should be equipped with double gate valves, and an 8-shaped blind plate should be installed on the double gate valve. Such 8-shaped blind plates are generally marked as normally open.
3. The device will be used during driving. Gate valves should be installed on pipelines that no longer pass through the medium after normal driving. The 8-shaped blind plate should be installed on the side of the pipeline that normally flows through the five medium. The 8-shaped blind plate is generally marked as normally closed.
When selecting an 8-shaped blind plate, attention should be paid to matching it with the flange used to clamp it. The length of the bolts used for clamping should be appropriately extended according to the thickness of the blind plate.
The purpose of installing an 8-shaped blind plate is only to achieve absolute cutting. That is, in important parts. Although there are many places with valves, the reliability of valves is difficult to grasp
DESCRIPTION:
Product | Neck welding flange; Flat welding flange with neck; Flat flange; Blind flange; Spectacle blind flange |
Technology | forge |
SIZE | 1/2”-120”; DN15-DN3000 |
Pressure rating | 150#;300#;600#;900#;2000#;3000#;6000#;9000# |
Material quality | ASTM A105N; A182Gr.F304/L; F316/L; A350LF2; A694F42 to F70;WP5; |
WP9;WP11;WP22;NACE MR-0175 | |
Standard | ASME B16.5; HG20592; DIN2527、2573、2627-2638、2673、2552、2653、2655、2656、2641、2642、2565-2569; GOST12820; JIS B2220 |
Paint-coat | Anti corrosion coating; Galvanizing |
application | Water treatment; Power plant accessories; Chemical engineering; Shipbuilding; Nuclear energy; Garbage disposal; Natural gas; petroleum |
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