Store Inspection,Loss Prevention For Drugstore,Retail Audit Analytics For Drugstore,Retail Audit Analytics For Grocery Store OP Retail (Suzhou) Technology Co., Ltd , https://www.opretailtech.com
1. Gate valve Also called gate valve, is a widely used valve. Its closing principle is that the sealing surface of the gate plate and the sealing surface of the valve seat are highly smooth, flat and consistent, which can prevent the medium from flowing and enhance the sealing effect by means of the die shape of the top mold, the spring or the gate plate. It is mainly in the pipeline cut off. Its advantages are: small fluid resistance, easy opening and closing, can be used in the case of two-way flow of medium without directionality, the sealing surface is not easy to be eroded when fully open and the structure is short in length, which is not only suitable for making small valves but also suitable for making small valves Big valve Gate valve stem thread divided into two categories, one is bright rod type, the second is dark rod type. According to the gate structure points, also divided into two categories, one parallel, the second mode. 2. Globe valve Globe valve, also known as the cut-off, is the most widely used type of valve, the reason why it is widely popular, because the friction between the sealing surface during opening and closing process is small, more durable, Made easy, easy maintenance, not only for low pressure, but also for high pressure. Its closure principle is to rely on the valve stem pressure, so that the sealing surface of the valve flap and valve seat sealing surface close fit, to prevent the flow of media. Globe only one-way media flow, the installation of a directional. Its structure is longer than the gate valve, while fluid resistance, long-term operation, the sealing reliability is not strong. Globe valve is divided into three categories: Straight-through, right angle and DC oblique stop valve. 3. Butterfly valve Butterfly valve, also known as the name suggests, its key components like a butterfly windward, free maneuver. Butterfly valve disc is a disc, around the seat inside a shaft rotation, the size of the swing angle is the degree of opening and closing the valve. Butterfly valve has the characteristics of light, more than any other valve to save material, simple structure, opening and closing quickly, cutting and throttling can be used, fluid resistance is small, easy operation. Butterfly valve, can make a great caliber. Where the butterfly valve can be used, it is best not to make the gate valve because the butterfly valve is more economical than the gate valve and has good adjustability. At present, the butterfly valve in the hot water pipe is widely used. 4. Ball Valve Ball valve works by the love of the valve to make the valve unblocked or blocked. Ball valve switch is light, small size, can be made of large diameter, reliable sealing, simple structure, easy maintenance, sealing surface and the spherical surface is often closed, easy to be media erosion, widely used in various industries. Ball valve is divided into two categories, one floating ball, the second is fixed ball. 5. Stopcock Stopcock valve is to rely on the body around the valve body center line rotation, in order to achieve the purpose of opening and closing. Its role is to cut off, sub-field and change the flow of media. Simple structure, small size, the operation only need to rotate 90 degrees, the fluid resistance is not large. The disadvantage is the switch is laborious, sealing surface easy to wear, easy to get stuck at high temperatures, not suitable for regulating the flow. Plug valve, also known as cock, Cork, turn the heart door. It's a lot of types, there are straight-through, three-way and four-way. 6. Check valve Check valve is to rely on the power of the fluid itself automatically open and close the valve, its role is to prevent the media back. It's many names, such as check valve, check valve, single-flow gate and so on. According to the structure can be divided into two categories. (1) Lift: The valve flap moves along the vertical centerline of the valve body. There are two types of check valves: one is horizontal, mounted on a horizontal pipe, the valve body shape similar to the cut-off valve, and the other is vertical, mounted on a vertical pipe. (2) Swing type: Valve revolves around the pin axis rotation, this valve has a single flap, double flap and flap, but the principle is the same. The suction pipe at the end of the suction pipe of the suction pipe of the pump is the deformation of the check valve. Its structure is the same as that of the two types of stop valves except that the lower end of the pump pipe is open so that water can enter 7. Pressure reducing valve The pressure reducing valve is a Medium pressure is reduced to a certain value of the automatic valve, the general valve pressure is less than 50% of the pressure before the valve. Many types of pressure reducing valve, the main piston and spring film two. Piston pressure reducing valve is the role of decompression valve piston. Spring film pressure reducing valve, is to rely on the spring and the film to pressure balance. 8. Trap trap also called block steam trap, trap, trap, back to the water box, back to the water gate. Its role is to automatically drain continuously generated condensate, without allowing steam to come out. Traps many types, a buoy, float, bell-shaped float, pulse, thermodynamic, thermal expansion. Commonly used buoy, bell-shaped float and thermodynamic. (1) float trap, float trap, the main valve, shaft, conduit, buoy and shell components. When the condensate in the equipment or pipeline enters the steam trap under the pressure of steam and gradually increases to close to the filled floats, the throttle valve opens due to the weight of the float falling beyond buoyancy. In this way, the condensate in the cylinder is discharged through the conduit and the valve under the action of steam pressure. When the condensate in the pontoon is nearly discharged, the float rises upward due to the weight reduction of the pontoon, so that the throttle valve is closed and the condensate begins to accumulate in the pontoon. This cyclical work, both automatic discharge of condensate, but also to prevent steam escape. (2) bell-shaped float trap bell-shaped float trap, also known as bucket trap (mainly by the regulating valve, buckets, housings and filters and other components. Bucket traps inverted, initially in a descent position , The control valve is open.When the cold air and condensate in the equipment or pipeline enter the steam trap under the pressure of steam, then it is discharged by the regulating valve.On the one hand, when the steam and the small amount of air which is not discharged gradually fill the inner volume of the bucket, Condensate accumulates at the same time, the bucket rises due to the buoyancy, so that the control valve is closed to stop the discharge of condensate.On the other hand, a small portion of steam and air inside the bucket discharge from the top of the bucket, and most of the heat So that the buoyancy of the bucket gradually decreases and falls, so that the control valve is opened and the condensate is discharged, so that the cyclical work can automatically discharge the condensate and prevent the steam from escaping. (3) Thermodynamic Hydrophobic Valve When the equipment or pipe in the condensate into the choke valve, the transformer chamber followed by condensation of steam to reduce the pressure, the pressure under the valve is greater than the above force , So the valve top.As the condensation of steam than the viscosity of the steam, the flow rate is low, so the valve and valve bottom is not easy to cause negative pressure, while the condensation of water through the gap between the valve and the shell is not easy to flow into the transformer room, So that the valve remains open, the condensate flows through the ring groove discharge.When the steam in the equipment or pipe to the traps, because the steam condensate than the viscosity of the small, high flow rate, so easy to ask the valve and valve seat asked negative pressure , While part of the steam flow into the transformer room, so the valve above the force greater than the following force, the valve quickly closed. This cyclical work, either automatically discharge condensate, but also to prevent steam escape.