Page 6 of Services

Electric butterfly valve is made up by butterfly valve and electric actuator, therefore, after the butterfly valve is determined, how to correctly choose electric actuator to meet the engineering need in practical use is becoming important. 1. Allowed value of stem diameter For lifting lever valve,...

 Usually, when calibrating the locator of small valves, you can use the automatic calibration function of hand operator directly. But sometimes, it may have something wrong. In this case, you can use the manual calibration function instead.  But if both of the functions don not work, you need...

These following factors will have an influence on how to choose the material of valve components. 1. The pressure, temperature and feature of working medium. 2. The force situation of this component and the role it plays in valve structure. 3. Good manufacturability. 4. When meeting the conditions above,...

Screwed connection valve:  This kind of connection is usually carried out by processing the valve inlet and outlet into taper or straight pipe thread so as to connect it to the tapered pipe thread or pipeline. However, this connection may lead to large channel leakage, so you have to use sealants,...

For flange leakage, you need to tight the bolt again. If not yet, open the flange to see if there is any damage to the flange gasket. For packing leakage, you need to compress the packing gland. If the packing is too loose, then add more packing. If the leakage is directly on the body, weld it (only...

1. Anti-corrosion. “Corrosion” is the process where the seal surfaces are eroded by medium. If the surfaces are destroyed, their seal ability will become poor. Therefore, the materials of seal surfaces must resist corrosion. Their anti-corrosion ability depends on their chemical stability....

Decompression valves are newly invented and applied to practice in recent years. They achieve extensive attentions in construction and fire-control water supply fields.   Decompression valves are installed on the outlet pipes of fire pumps. They are closed in normal times and automatically open...

There are various kinds of valves and many complicated working conditions. To choose the most suitable valves for pipe system, you should know:  First, the characters of valves;  Second, the steps and reasons to select valves;  Third, the principles of choosing valves for oil and chemical...

Nuclear power valves, due to their special, complex and harsh service conditions, coupled with large amount and wide range, have higher requirements.   1. Working Conditions of Nuclear Power Valves. Transport medium of nuclear power valves mainly contains: saturated steam, condensate, radioactive...