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For conventional valves supplier, due to the quality of the conventional valves difference from other valves has advantages of light, corrosion resistance, fouling, coefficient of thermal conductivity small, long service life and can be connected to the integration of plastic pipe, conventional valves’ application advantages in some areas cannot be replaced in industrial water and other liquid plastic pipeline system. At present in domestic production and electric actuators application of conventional valves, there are no reliable rules of its control, industrial water and other liquid conventional valve product quality is uneven, causing serious engineering application of closed lax and leakage phenomenon, and affecting the overall development of plastic pipe application. At present, its product standards and methods standards are formulated according to the international standard.
For conventional valves supplier, international conventional valves difference from other valves adopts the main type of ball valve, butterfly valve, cut-off valve, diaphragm valve and gate valve, etc.; Raw materials are using acrylonitrile - butadiene - styrene (ABS), the plasticized polyvinyl chloride (PVC -u), chlorinated polyvinyl chloride (PVC - C), poly butylene (PB), polyethylene (PE), polypropylene (PP) and polyvinylidene fluoride (PVDF); The electric actuators connection way involves connection socket binding. And standards of conventional valve sealing test, body long-term performance test, the whole valve test, fatigue test and operating torque and so on all the rules, also gives the conventional valve used for industrial conveying fluid design for 25 years of service life requirements.
For conventional valves supplier, the biggest difference for conventional valves from other valves is the acid and alkali resistance, and characteristics that some metal materials do not have. They are generally applicable for pipe pressure less than 6 kg; different plastic materials have different corrosion degrees. 1. Polyvinyl chloride (PVC): it is thermoplastic, which has excellent corrosion resistance, acid, alkali, and salt, organic matter. 2. Nylon, polyamide, it is a thermoplastic, which has good resistance to corrosion. It has electrical resistance, flame resistance, weather resistance, dimension stability, therefore, this kind of material has been widely used in the automotive, electrical equipment, the pneumatic actuators structure, transportation equipment, textile, paper making machinery, etc. 3. Polypropylene is a thermoplastic plastics, its corrosion resistance is quite the same as polyethylene. It can deal with most organic acid, inorganic acid, salt, but for nitric acid, fuming sulfuric acid, nitro chloroform acid and other strong oxidizing acid corrosion ability is poor. 4. Polyethylene: have excellent corrosion resistance, it has good corrosion resistance of hydrochloric acid, thin sulfuric acid, hydrofluoric acid and other non-oxidizing acid and dilute nitric acid and many other kinds of solvent. 5. Chlorinated poly-ether, also called polyvinyl chloride ether, it is linear, high degree of crystallinity of thermoplastic plastics.