Globe valve selection principle
Activated Alumina,Activated Alumina Balls,Alumina Desiccant,Alumina Adsorbent Ningbo Cijie Chemical Equipment Co., Ltd. , https://www.shengjie-tower.com
Cut-off valve is also called the cut-off, is the most widely used type of valve, the reason why it is popular because of the friction between the sealing surface during opening and closing process is small, more durable, open height, easy to manufacture, easy maintenance , Not only for low pressure, but also for high pressure. Closing valve closing principle is to rely on valve stem pressure, so that valve disc sealing surface and seat sealing surface close fit, to prevent the circulation of media. Globe only one-way media flow, the installation of a directional. Shut-off valve structure is greater than the gate valve length, while fluid resistance, long-term operation, the sealing reliability is not strong. Globe valves fall into three categories: Straight-through globe valves, right angle globe valves, and straight-flow diagonal globe valves. The most obvious advantage is that during the opening and closing process, the valve plate is wearable because of the lower friction between the sealing surfaces of the valve body and the gate valve. The opening height is only 1/4 of the diameter of the valve seat passage, so it is much smaller than the valve. Usually there is only one sealing surface on the valve body and the valve disc, so manufacturing technology is relatively good and easy to maintain. Nominal pressure of the globe valve or pressure level: PN1.0-16.0MPa, ANSICLASS150-900, JIS10-20K, nominal diameter or diameter: DN10 ~ 500, NPS1 / 2 ~ 36 ", stop valve connection: flange, butt welding , Thread, etc. Suitable temperature: -196 ℃ ~ 700 ℃, stop valve Driving mode: manual, bevel gear, pneumatic, electric, hydraulic, gas and liquid, electrohydraulic linkage, valve body material: WCB, ZG1Cr18Ni9Ti, ZG1Cr18Ni12Mo2Ti, The valve is made of different materials and can be applied to water, steam, oil, nitric acid, acetic acid, oxidizing media, urea, etc. A variety of media. Cut-off valve selection principle Cut-off valve is the closing piece (valve) moves along the valve seat center line valve.According to the valve flap in this form of movement, valve seat opening change is proportional to the valve stroke Because of the valve stem opening or closing stroke is relatively short, but also has a very reliable cut-off function, but also because the valve seat opening changes in direct proportion to the valve stroke, very suitable for the regulation of flow. Therefore, this type of valve The door is well suited for shut-off or regulation and throttling purposes. 1. Shut-off valves are suitable for use on high temperature, high pressure medium lines or installations such as high temperature and high pressure lines in thermal power plants, nuclear power plants, petrochemical systems. 2. Convection on pipelines Resistance requirements of the pipeline on the lax, that is, the pressure loss is not considered little place. 3 small valve optional needle valve, valve, sampling valve, pressure gauge valve, etc .. 4. Flow adjustment or pressure adjustment, but the adjustment Precision requirements are not high, and the pipeline diameter is relatively small, such as the nominal pass through the pipeline ≤50mm, should be selected. 5. Synthetic industrial production of small chemical fertilizers and large-scale fertilizer should be used Nominal pressure PN160 Nominal pressure 16MPa or PN320 Nominal pressure 32MPa high pressure angle type stop valve or high pressure angle type stop valve 6. Aluminosilicate Bayer process in the production of desiliconization workshop, easy coking pipe, easy to use separate valve body, seat removable, carbide seal Deputy of the DC-stop valve or DC-type shut-off valve 7. Urban construction of water supply and heating works, the nominal pass through the smaller pipe, the choice of globe valve, balance valve or plunger , Such as less than 150mm nominal pass through the pipeline this article keyword search: more technical articles valve