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Ningbo RMI Plastic Co., Ltd.

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  • PP Butterfly Valve Wafer Type DIN PN10
    PP Butterfly Valve Wafer Type DIN PN10
  • PPH Diaphragm Valve JIS 10K
    PPH Diaphragm Valve JIS 10K
  • PPH Ball Valve Flange End Lever Handle
    PPH Ball Valve Flange End Lever Handle
  • PVC True Union Ball Valve Socket End
    PVC True Union Ball Valve Socket End
  • PVDF Ball Check Valve ANSI
    PVDF Ball Check Valve ANSI
  • PVC Bottom Valve Flange End ANSI CL150
    PVC Bottom Valve Flange End ANSI CL150
  • PVDF Swing Check Valve Flanged PN10
    PVDF Swing Check Valve Flanged PN10
  • Plastic Diaphragm Valve Pneumatic Actuatored
    Plastic Diaphragm Valve Pneumatic Actuatored
  • PVC Vanstone flange PN16
    PVC Vanstone flange PN16
  • Plastic Shell Motorized Actuator Rotary Switch Type
    Plastic Shell Motorized Actuator Rotary Switch Type

ABOUT US

Ningbo RMI Plastic Co., Ltd. is a professional manufacturer and exporter of plastic valves and piping materials, provide consult service and supply high quality piping materials for industrial application, water treatment system, irrigation systems, etc. RMI products cover full range of plastic valves, pipes, fittings and accessories by different materials of PVDF, PVC, PVC-C, PP, PP-H, PP-GF, FRP, EPDM, VITON, PTFE. Over 30 kinds different valves include Diaphragm Valve, Ball Valve, Check Valve, Butterfly Valve, Foot Valve, Globe Valve, etc. Size from 1/2" up to 32", following standard of DIN, JIS, ANSI, CNS, ISO. 8 different materials of pipes and fittings diameter from 16mm to 600mm. With high quality products and professional technical support, we serve more than 200 customers in different industries and areas all around the world, and win good reputation. Especially in steel industrial, chloride alkali industry, metallurgical industry, paper making industry, pharmaceutical factory, electroplating factory, mining plant, fish farm, etc. We are continual working for the target of quality improving, technical innovation and service satisfied. Aim to provide customer durable and efficient products to ensure the piping system working safer and longer.
  • 24
    24 H Online Service No Time Difference.
  • 2006
    It is a Chinese brand established in 2006.
  • 5
    Our Factory Have More Than 5 Employees.
  • 5000
    More Than 5000 Square Meters Technical R&D Building.
News
  • 1. Concentric butterfly valve Concentric butterfly valve stem axis, disc center, valve center in the same position. Its structure is simple and easy to manufacture. Now the common rubber lined butterfly valve belongs to this kind of structure. Its disadvantages are that the butterfly plate and the valve seat are always in the state of extrusion and scraping, large resistance distance and fast wear. Because of these shortcomings, the butterfly valve of this kind of structure basically adopts flexible rubber or fluoroplastic and other soft sealing forms. But it's also limited by temperature. 2. Single eccentric butterfly valve In order to solve the extrusion problem between the butterfly plate and the valve seat of concentric butterfly valve, the single eccentric butterfly valve is produced. The structure that the shaft axis of the valve rod deviates from the center of the butterfly plate is adopted, so that the upper and lower ends of the butterfly plate no longer become the rotary axis, disperse and reduce the excessive extrusion between the upper and lower ends of the butterfly plate and the valve seat. However, due to the single eccentric structure in the whole process of valve opening and closing, the scraping phenomenon between butterfly plate and valve seat has not disappeared, and the application range is similar to that of concentric butterfly valve, so it is not used much. 3. Double eccentric butterfly valve Double eccentric butterfly valve is further improved on the basis of single eccentric butterfly valve, which is the most widely used double eccentric butterfly valve at present. The structure feature is that the shaft center of the valve rod deviates from the center of the butterfly plate and the center of the body. The effect of double eccentricity makes the butterfly plate break away from the valve seat immediately after the valve is opened, which greatly eliminates the unnecess
    2020-08 01
  • Sealing schematic diagram of double eccentric sealing butterfly valve On the basis of single eccentric butterfly valve, the rotary center of butterfly plate (i.e. the center of valve shaft) is offset with the center line of valve body to form dimension B. during the opening process of butterfly valve, the sealing surface of butterfly plate will break away from the sealing surface of valve seat faster than that of single eccentric sealing butterfly valve. When the butterfly plate is rotated to 8 ° to 12 °, the sealing surface of butterfly plate will completely break away from the valve seat seal. When the butterfly plate is fully opened, the shape between the two sealing surfaces will be formed The design of this kind of butterfly valve greatly reduces the mechanical wear and extrusion deformation between the two sealing surfaces, and improves the sealing performance of the butterfly valve. Since the rotating center (i.e. the center of valve shaft) of butterfly plate and the sealing section of butterfly plate are set eccentrically according to a, the sealing surface of butterfly plate is gradually separated from the sealing surface of valve seat during the opening process of butterfly valve. When the butterfly plate is rotated to 20 ° to 25 °, the sealing surface of butterfly plate is completely separated from the sealing surface of valve seat. When the butterfly plate is fully opened, a gap x is formed between the two sealing surfaces, which makes the two sealing surfaces of butterfly valve in the process of opening and closing The relative mechanical wear and extrusion are greatly reduced, thus ensuring the sealing of butterfly valve. 3. Sealing principle of triple eccentric sealing butterfly valve Sealing schematic diagram of triple eccentric sealing butterfly valve Because the center line of the valve seat and the center line of the valve body form a β angle of
    2020-07 20
  • service life: The butterfly valve can still be closed "airtight" after being used for more than 10000 times. Pressure drop: If the pressure drop is too large, it will increase the energy consumption. However, it should be noted that the valve is not the only factor causing pressure drop in the pipeline system, and the following factors also cause pressure drop. The fluid section of the pipe. Friction on the inner wall of the pipe. A change in flow direction as it passes through a component. The flow characteristics of butterfly valves are three times or more than that of globe valves and 75% of those of gate valves of the same size generality: Butterfly valve controls and regulates the piping system by opening / closing and throttling / balancing. Butterfly valves are more versatile than gate or globe valves. Because butterfly valve can adopt various surface treatment technology and choose elastic material pipeline, so butterfly valve has strong chemical anti-corrosion performance. Weight: Light duty butterfly valves cost less than cast iron valves: for example, a 10 inch butterfly valve weighs 55 pounds, while a 10 inch cast iron gate valve weighs 490 pounds. For the whole pipeline system, the installation cost saved by using butterfly valve is very considerable. In addition, the heavier the piping system, the stronger the pipe support base is, which makes the whole piping system more expensive. Therefore, considering the weight of the val
    2020-07 07
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