Push the gasket on the sealing surface between the two flanges, align the center of the two flanges and the center of the bolt hole, insert the bolt, screw on the nut, and tighten the nut diagonally several times with even force. The bolt extends out of the nut The length of 2-3 pitches is appropriate. After the flange gasket is installed, it should be tested by working pressure and no leakage is …

The function of non-return valve is to limit the flow of fluid through it one direction.They are also called check valves.They may be manually operated or may be automatic operated.Automatic valves are designed for particular pressure, when pressure (of fluid) exceeds that limit , valve opens allowing the fluid to flow through it.…

Gate ValveIn gate valve, a gate slides between the seats of the valve. Movement of the gate is at right angle to the flow of fluid. By opening the valve, flow path is enlarged in a highly non-linear manner with respect to percentage of opening.Gate valve is normally used for isolation application where only fully close or fully open position is required. …

There are five types of cryogenic valves that are ideal for cryogenic media. Each of these types has its own set of characteristics that make them suitable in some applications and unsuitable in others. 1.Globe Valves.  Called such due to their spherical shape, these valves have an internal movable disc -- the obturator -- that rotates at 90 degrees to the plane of its coordinated body seat. Thes…

1. By structure According to the structure, it can be divided into trunnion ball valve, floating ball valve and flexible ball valve.According to the installation location,can be divided into top entry ball valve and side entry ball valve. 2. By actuator According to the ball valve actuator, can be divided into electric actuated ball valve,hydraulic actuated ball valve,pneumatic actuated ball va…

How do Crogenic Valves work? As its name suggests, cryogenic valves are designed to be used in very cold applications. They are thus most popularly used by companies that work with Liquefied Natural Gas (LNG) or Compressed Natural Gas (CNG). For instance, the oil and gas industry frequently uses cryogenic temperature ranges starting at -238 degrees Fahrenheit (-150 degrees Celcius). Additional…

Wafer butterfly valves and flanged butterfly valves are two common types of butterfly valves. Both types of butterfly valves have a very wide range of applications, but many friends cannot distinguish the difference between a wafer butterfly valve and a flange butterfly valve…

Single eccentric butterfly valve: In order to solve the problem of squeezing between the butterfly plate and the valve seat of the concentric butterfly valve, the single eccentric butterfly valve is produced. …