Entries by Perfect Manufacturing

How to prevent valve cavitation?

The disc and seat and other parts of the internal of the control valve and the reducing valve will appear friction, groove and other defects, most of these are caused by cavitation. Cavitation is the whole process of bubble accumulation, movement, division and elimination. When the liquid passes through the valve partially open, the static […]

How to choose valve for oxygen pipeline?

Oxygen has typically active chemical properties. It is a strong oxidizing and a combustibility substance and can combine with most elements to form oxides except for gold, silver and inert gases such as helium, neon, argon and krypton. An explosion occurs when oxygen is mixed with combustible gases (acetylene, hydrogen, methane, etc.) in a certain […]

Why is the anti-static design essential for ball valve?

Static electricity is a common physical phenomenon. When two different materials friction, the transfer of electrons produces electrostatic charge, this process is called friction electrification. In theory, two objects of different materials can produce static electricity when they rub together, but two objects of the same material cannot. When the phenomenon produced in the valve […]

What is the difference between a relief valve and safety valve?

Safety valves and relief valves have similar structure and performance, both of which discharge internal media automatically when the pressure exceeds the set value to ensure the safety of the production device. Because of this essential similarity, the two are often confused and their differences are often overlooked as they are interchangeable in some production […]

Nitrogen blanketing system for storage tanks

Nitrogen blanketing system is complete of devices to maintain a constant pressure state by injecting N2 gas, that is, inert gas to the upper room of the tank storage. It is composed of a series of Nitrogen high pressure reducing valve (supplying valves/bleeding valves), breather valves, pressure gage and other piping system and safety device, […]

What are breather valves?

Sometimes referred to as pressure and vacuum relief valve, the breather valve is an important part for atmospheric tanks & vessels in which solvents are filled and drawn at a high flow rate. This type of valve is installed in the in-and out-breathing lines of tanks, vessels and process equipment to retain toxic vapors and […]