Globe valve overview

Cut-off valve, also called sectional door, is the most widely used type of valve. Its popularity is due to the small friction between the sealing surfaces in the process of opening and closing. It is relatively durable, the opening height is not large, and it is easy to manufacture and maintain. Convenient, not only for medium and low pressure, but also for high pressure.

The principle of closure of the shut-off valve is to rely on the pressure of the valve rod so that the sealing surface of the valve flap and the sealing surface of the valve seat fit closely and prevent the flow of the medium.

The cut-off valve can only allow the medium to flow in one direction and has directionality when installed. The structural length of the cut-off valve is greater than the gate valve, and the fluid resistance is large. In long-term operation, the sealing reliability is not strong.

Shutoff valves are divided into three categories: straight-through shut-off valves, right-angle shut-off valves and direct-flow diagonal cut-off valves.

The most obvious advantage is that during the opening and closing process, the friction between the valve flap and the sealing surface of the valve body is smaller than that of the gate valve, so that it is wear-resistant. The opening height is generally only 1/4 of the diameter of the seat channel and is therefore much smaller than the gate valve. Usually there is only one sealing surface on the valve body and the valve flap, so the manufacturing process is better and it is easy to maintain.

Nominal pressure or pressure level of the stop valve: PN1.0-16.0MPa, ANSI CLASS 150-900, JIS10-20K Nominal diameter or bore diameter: DN10～500, NPS 1/2～36" Closing valve connection method: flange, pair Welding, thread, etc. Applicable temperature: -196 °C ~ 700 °C Closing valve Drive: Manual, bevel gear transmission, pneumatic, electric, hydraulic, gas-liquid linkage, electro-hydraulic linkage Body material: WCB, ZG1Cr18Ni9Ti, ZG1Cr18Ni12Mo2Ti, CF8 ( 304), CF3 (304L), CF8M (316), CF3M (316L), Ti. Globe valves are made of different materials and can be applied to water, steam, oil, nitric acid, acetic acid, oxidizing medium, urea, etc. medium.