The globe valve, also known as the gate valve, is a forced sealed valve, so when the valve is closed, pressure must be applied to the valve disc to force the sealing surface not to leak. When the medium enters the valve from below the valve disc, the resistance that the operating force needs to overcome is the friction force of the valve stem and the filler and the thrust generated by the pressure of the medium. The force of closing the valve is larger than the force of opening the valve, so the diameter of the valve stem should be large, otherwise the failure of the top bend of the valve stem will occur. According to the connection method, it is divided into three kinds: flange connection, wire connection, welding connection. After the self-sealing valve appears, the medium flow of the stop valve changes from the top of the valve disc into the valve chamber, then under the action of the medium pressure, the force of closing the valve is small, and the force of opening the valve is large, and the diameter of the valve stem can be reduced accordingly. At the same time, under the action of the medium, this form of valve is also more tight. China’s valve “three to” has stipulated that the flow of the globe valve, all top-down. When the globe valve is opened, the opening height of the valve disc is 25% to 30% of the nominal diameter. The flow rate has reached the maximum, indicating that the valve has reached the full open position. Therefore, the full open position of the globe valve should be determined by the stroke of the valve disc.
The opening and closing part of the stop valve (Globe Valve) is a stop-shaped valve disc, which is flat or conical above the seal, and the valve disc moves in a straight line along the center line of the seat. The movement form of the valve stem, (common name: dark rod), and the lifting rotary rod type can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. Therefore, this type of cut-off globe valve is ideal for use as a cut-off or regulation as well as throttling. Because the stem opening or closing stroke of this type of valve is relatively short, and has a very reliable cutting function, and because the change of the valve seat port is directly proportional to the stroke of the valve disc, it is very suitable for the adjustment of the flow rate.
Our pinch valve sleeve materials currently include Linke’s patented 38-series Nadiflex composite rubber, Q-grade NR natural rubber jointly sourced from Lanxess and Mitsui, EPDM ethylene propylene rubber, SI6501 high molecular silicone rubber, and NBR nitrile rubber. Additionally, we offer specialized pinch valve sleeve materials such as Hypalon rubber, CR-grade chloroprene rubber, and B-grade IIR butyl […]
The fluorine-lined butterfly valve is engineered for aggressive chemical and ultra-pure applications. Its fluorine lining resists chemical attack from various compounds, while a flexible 360-degree backup liner ensures bubble-tight shut-off. This maintenance-free valve features redundant shaft seals, a 90-degree clockwise operation, and zero leakage. Main parts and materials Name/Material WCB CF8 CF3 CF8M CF3M Body […]
Y type Strainer is an indispensable filter device in the pipeline system of conveying media made by stainless steel. It is usually installed at the inlet end of pressure reducing valve, pressure relief valve, fixed level valve or other equipment to remove impurities in the media to protect the normal use of valves and equipment. The characteristics include advanced structure, low resistance, convenient blowdown and so on. Applicable media can be water, oil, gas. Generally, the water network is 18 to 30 mesh, the ventilation network is 10 to 100 mesh, and the oil network is 100 to 480 mesh. Main parts and materials Name/Material WCB CF8 CF3 CF8M CF3M Body WCB CF8 CF3 CF8M CF3M Screen SS304 SS304 SS304L SS316L SS316L Bolt/Nut B7/2H B8/8 B8/8 B8M/8M B8M/8M Gasket PTFE、NBR、Metal Wound Graphite Filter Fineness 10Mesh ~ 400Mesh Flange Standard JIS、ASME、DIN、BS、GB Pressure 0.6Mpa ~ […]
The stainless steel flanged ball valve operates using a spherical closure element (the ball) that rotates around its axis, enabling quick opening and closing actions. This valve features flanged connections, allowing it to be easily mounted to piping systems. Key Features Operation Mechanism Fluid Regulation and Control Hard Seal V-Type Ball Valve Multi-Pass Functionality Installation […]
