Contact Yonglong
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Mobile: 15900658318 -
Fax: 021-57568296 -
Email: 1257073858@qq.com -
Address: Nanting Highway, Fengxian District, Shanghai -
2788
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twenty-five 2022-11 P11H-16P Installation and setting of automatic exhaust valve The stainless steel floating ball P11H-16P automatic exhaust valve produced by Shanghai Nanyuan Machinery Co., Ltd. (formerly Shanghai Fengxian Machinery Factory) is used for exhaust of pipes in independent heating systems, centralized heating systems, heating boilers, central air conditioners, floor heating and solar heating systems -
twenty-four 2022-11 Working principle of lever extrusion electric pipe clamp valve The two ends of the rubber inner sleeve inside the GJ941X-06L lever extrusion electric pipe clamp valve are connected with the pipeline and become a part of the material delivery pipeline. The two sides of the middle part of the inner sleeve are equipped with extrusion levers. When the upper and lower levers are squeezed together, the pipe clamp valve will be flattened to close the channel, and the channel will open after the lever is released -
fifteen 2022-05 Selection method of stop valve under different working conditions The stop valve, also known as throttle valve, adopts the form of low inlet and high outlet. Through the mechanical pressure of the valve stem, the valve disc is pressed against the valve seat, and the angular plane at the bottom of the valve stem is mechanically wedged against the ball to make it tightly pressed against the valve seat, so as to achieve complete sealing -
twenty-seven 2022-03 Working principle of liquid ammonia safety valve Liquid ammonia safety valve is also called ammonia safety valve and ammonia gas safety valve. The common structure types are A42F full open type and A41F micro open type, which belong to closed spring type safety valve. The closed type means that the discharged medium does not leak out, and it is discharged along the specified outlet. It is generally used for toxic, combustible and corrosive media -
twenty-three 2022-03 Butterfly valve knowledge: working principle of pneumatic butterfly valve The pneumatic butterfly valve is composed of a pneumatic actuator and butterfly valve, solenoid valve coil, air filtration pressure reducing valve, signal feedback device, and manual handwheel device. With compressed air as the power source, the actuator drives the valve stem to rotate, and the valve stem drives the disc butterfly plate to rotate to open and close -
ten 2022-03 Common sense of shut-off valve: selection of pneumatic shut-off valve and types of accessories Introduction to the Technical Manual of the Shanghai Shut off Valve Manufacturer During the use of the pneumatic shut off valve (full name: pneumatic emergency shut off valve), it is usually necessary to configure some auxiliary accessories to improve the performance of the pneumatic shut off valve, or improve the use efficiency of the shut off valve -
01 2022-03 Advantages of RPTFE sealing ring for high-performance double eccentric butterfly valve The RPTFE sealing ring of high-performance double eccentric butterfly valve is a new sealing material developed to replace the application scenario of PPL, which can replace the sealing ring of imported double eccentric butterfly valve and high-performance butterfly valve. In several cases of high temperature conditions where problems occurred in the use of PPL products by customers, carbon fiber RPTFE products were used to solve the problem -
twenty-two 2022-02 Precautions for installation of high-performance double eccentric butterfly valve The double eccentric butterfly valve is also called high-performance butterfly valve. Its structural feature is that the axis of the valve stem deviates from both the center of the butterfly plate and the center of the body, greatly eliminating unnecessary excessive extrusion and scraping between the butterfly plate and the valve seat, reducing the opening resistance, reducing wear, and improving the service life of the valve seat -
twenty-one 2022-02 Difference between positive and negative actions of regulating valve The small edition of the Shanghai regulating valve manufacturer introduces the difference between the positive action and the reaction of the regulating valve: the positive action reaction of the regulating valve is relative to the actuator of the pneumatic diaphragm regulating valve. When the upper part of the diaphragm head enters the air and the push rod moves downward, it is called the positive action. The lower air intake and the upward movement of the push rod are called reaction -
twenty-one 2022-02 Pressure test method of emergency shut-off valve and ammonia shut-off valve The emergency stop valve and ammonia stop valve belong to industrial valves. Before leaving the factory, the valve strength test and valve sealing test shall be conducted on the valve pressure test bench. The media commonly used for pressure test include water, air, nitrogen, etc., which can only be packaged and warehoused after passing the test
