This brief explanation of the current industry valve in the flow of industrial power in the industry are used. Sun plots of each

Cursor: The cursor is a service valve, in general, especially for the on - off mode, not standard. The valve is a flat disc holder, vertical or slipping down the block valves to stop the flow.

The valve closure: The effects of closing the valve with a plug with flat or rounded to a corresponding horizontal seat located in the center of the valve. Increasing the intake valve opens to let the liquid flow. The shutoff valve for service on - off and deals with limiting the applications.

Subject: The pinch valve is particularly suitable for applications of sludge and liquids with large amounts of suspended solids. The sealing of one or more flexible elements, such as a rubber hose, which in turn can take.

The valve membrane: the membrane is closed by a flexible membrane with a compressor. When the compressor is controlled by the valve stem is reduced to a dam, cutting off the flow dividers. The diaphragm valve handles corrosive services, erosive and dirty.

The needle valve, needle, a volume control valve, the flow is limited in small lines. The liquid passes through the valve is rotated 90 degrees and passes through an opening that is home to a rod with tapered tip. The aperture size is changed by the placement of the cone relative to the seat.
 
Task

Besides these standard products of the valve, valve manufacturers are many variations of custom valves and actuators developed for specific applications. The valves are available in a wide range of sizes and materials. Each model has its own advantages and select the right valve for a particular application is critical. The factors usually considered in the choice of a valve:

The substance in question and the required flow.
The requirement that the valve timing and / or detained in the requirements for application requirements.
The capacity of the valve to the maximum working pressure and temperature resistance.
The capacity of the valve that leads to erosion or corrosion resistance.
Requirements of the record in your case.
Maintenance and repairs.

Turn valves or rotary

Valve: The ball is mainly used for service on / off and regulating certain services. It controls the flow through a plug of cylindrical or conical with a hole in the center of the path of abandonment flow valve. A quarter turn in the blocks of the direction of the flow path.

The ball valve: The valve is similar in concept to use the ball, but a sphere that rotates with a hole through which the line through the allowable flow in the open position and move to the outlet when the ball is rotated 90 degree block the flow passage. It is used for switching and the service limit.

Registration: The throttle control flow through a circular disc or vane with its pivot axis perpendicular to the direction of flow in the pipe. The butterfly is suitable for on-off services and limited use.

Operating valves

The dual check valve: The valve is designed to prevent backflow. Flow in the desired direction opens the exhaust valve while the forces of the valve closed.

Safety Valve: The pressure relief valve is designed to provide protection against overpressure in the steam, gas, air and fluid lines. Valve "allowing the mind" when security pressures are exceeded, then closes when the pressure drops to a predetermined value.

CONTROL VALVE

Control valve: The valve is designed to ensure precise control of the dosing flow. Automatically varying the flow rate signal received from sensing devices in a continuous process. Some valves are designed as control valves.

However, most types of valves and control valves, both linear and rotary movements are used, dual check valve, addition of electric actuators, positioners and others.