How to select valves in the water supply network?

Cast Iron Check Valve Supplier shares that water supply pipe network is composed of pipes, valves and other pipe  accessories. According to different needs (water volume of pipe network, water  pressure scheduling and deployment, maintenance and repair of water needs, new  and old pipe line connection, pipeline flushing, etc.), every day to open and  close the valve. The service life and quality of the valve determine the normal  operation of the pipe network.

Since the pipe network is the bridge between the water supply enterprises and  the majority of users, it can be said as follows: the management of a water  supply enterprise is reflected in the normal operation of the pipe network; The  normal operation of water supply pipe network is closely related to the service  life and quality of the valve.

Safety of water supply

Not affecting water quality is an important indicator of valve selection. The  part that the valve contacts with water directly basically is valve body inside,  sealing part, valve plate to wait, at present the sealing part of the valve that  a lot of manufacturer produce USES rubber material. The commonly used rubber  materials are NBR, CR or EPDM. These rubber are synthetic rubber. Cast Iron Gate Valve China points that in the process  of synthesis, more than ten kinds of raw materials and additives such as  anti-aging agent should be added into the natural rubber. Whether the final  synthetic rubber can be used for the sealing of water supply valves must be  determined by whether the rubber is non-toxic and meets the hygienic standard of  drinking water. As to valve inside reach the place such as valve plate, a lot of  manufacturers use the method that paints in the past, consider rustproof problem  only, and do not consider toxic. In practice, we found that: in the water supply  pipe network, the pipeline lining corrosion problem has been solved, and the  pipe network valve has no lining, due to the phenomenon of water precipitation  and iron bacteria in water on the valve chamber and valve plate erosion and  deposition, resulting in some of the valve body inner wall hilly accumulation  phenomenon. It not only affects the water quality, but also is one of the main  reasons why some valves are not closed tightly. Accordingly, we ask, these and  water contact place directly, should spray avirulent coating, had better be to  use the method of electrostatic spraying to spray avirulent epoxy powder. When  we are choosing a valve, should check above all whether to have the avirulent  proof of rubber and coating and examine eligible certificate, have the valve of  afore-mentioned conditions only, ability assures water quality is not polluted,  assure the safety that supplies water.