The effective sealing of pumps and valves depends on the overall condition of each component. Before installing the packing, make sure that the equipment which needs to be replaced has been effectively separated according to the site and system. This article is used to guide the maintenance personnel,...
The fully enclosed structure of high temperature and high-pressure ball valves with zero leakage as well as selection methods and working principles of shielded electric devices are introduced in this article. The structural characteristics of the shielded control...
Valves made from nickel based alloy materials can work well on pipeline equipment in fine chemical engineering, metallurgical and smelting industries. They are very reliable corrosion resistant valves with good performance such as high strength, good toughness, high temperature...
The general valve selection is based on functions and characteristics. If the body material of the valve used for natural gas is not matched, it may cause leakages or internal leakages of the valve body and seal. The mechanical properties, strength and rigidity of the parts cannot...
Characteristics of the shipping industry The shipyard is very simple. Therefore, there is very little space on board. The operator must reduce the volume to make the natural gas tank as small as possible. Liquefied natural gas or LNG is adopted to realize this purpose. Natural gas is liquidized by...
Test processes The matching relationship test between pressure of the hydro-cylinder and pressure of the medium and temperature is relatively complicated, and the specific test procedures are implemented according to technical requirements. (1) First, put the valve in a semi-closed...
Abstract This article introduces a heat insulation effect test of high-pressure and ultra-high temperature valve body and the test device and operation method of the matching relationship between the pressure of the hydraulic actuator and the medium temperature and pressure. Overview...
Installation and flow directions Gate valves flow in both directions with the same effect. Inlet or outlet direction is not required in the installation and the medium can flow from both directions. Globe valves should be installed strictly based on the arrow on the valve body. There is a clear regulation...
Valves such as globe valves, gate valves, butterfly valves, check valves and ball valves are all indispensable control components in various piping systems. Each valve is different in appearance, structure and even functional purpose. However, the globe valve and the gate valve have some similarities...
Selection of valves Valves are generally selected according to factors such as characteristics of media, operating conditions and valve requirements. The major Chinese valve manufacturer can manufacture various types of valves according to the above standards to meet the needs of refining and chemical...
A valve is an important component of refining and chemical pipeline systems and plays an important role in petroleum processing. Valves are used to connect and cut off the medium, prevent the medium from flowing backwards, adjust the medium's pressure and flow rate and distribute the medium. Selection...
The introduction of corrosion fatigue 1. The definition of corrosion fatigue Corrosion fatigue is a kind of corrosion that occurs under the combined effect of cyclic stress of equipment and the corrosive environment, involving many industrial sectors such as propeller, shaft, rudder, aircraft...