The shape of the valve opening and closing part and the valve flow path make the valve have certain flow characteristics. This must be taken into account when selecting the valve.
1. The valve used to cut off and connect the medium usually has a smaller flow resistance, and the flow path is a straight-through valve. This type of valve has a gate valve and a globe valve. Plunger valve. Down-closed valves are less preferred due to the tortuous flow path and higher flow resistance than other valves. However, closed valves can also be used where higher flow resistance is permitted.
2. Valves used to control flow are usually selected valves that are easy to regulate flow. Such as regulating valve, throttle valve, piston valve, because of its proportional relationship between the size of the seat and the opening and closing of the trip. Rotary (such as plug valves, ball valves, butterfly valves) and flexible valve (pinch, diaphragm valve) valves can also be used for throttling control, but are generally lighter than a limited range of valve diameters. In most cases, people usually use a change in the shape of the valve flap to throttle. It should be pointed out that it is extremely unreasonable to achieve a throttling effect by changing the opening height of a gate valve or a shutoff valve. Because, in the management of the medium in the throttling state, the flow rate is high, the sealing surface is washed and worn, and the seal is not cut off. Similarly, using the throttle valve as a cutting device is not unreasonable.
3, reversing diversion valve according to the need for commutation diversion, this valve can have three or more channels, issues in the use of plug valves to drink ball valve. Most of the commutating diverter valves use this type of valve. In some cases, other types of valves, suitably interconnected by two or more, may also be used as commutating diverts of the medium.
4. Valves for media with suspended particles If the media has suspended particles, it is best to use a sliding valve with wiper action along its sealing surface. Such as flat gate valve
1. The valve used to cut off and connect the medium usually has a smaller flow resistance, and the flow path is a straight-through valve. This type of valve has a gate valve and a globe valve. Plunger valve. Down-closed valves are less preferred due to the tortuous flow path and higher flow resistance than other valves. However, closed valves can also be used where higher flow resistance is permitted.
2. Valves used to control flow are usually selected valves that are easy to regulate flow. Such as regulating valve, throttle valve, piston valve, because of its proportional relationship between the size of the seat and the opening and closing of the trip. Rotary (such as plug valves, ball valves, butterfly valves) and flexible valve (pinch, diaphragm valve) valves can also be used for throttling control, but are generally lighter than a limited range of valve diameters. In most cases, people usually use a change in the shape of the valve flap to throttle. It should be pointed out that it is extremely unreasonable to achieve a throttling effect by changing the opening height of a gate valve or a shutoff valve. Because, in the management of the medium in the throttling state, the flow rate is high, the sealing surface is washed and worn, and the seal is not cut off. Similarly, using the throttle valve as a cutting device is not unreasonable.
3, reversing diversion valve according to the need for commutation diversion, this valve can have three or more channels, issues in the use of plug valves to drink ball valve. Most of the commutating diverter valves use this type of valve. In some cases, other types of valves, suitably interconnected by two or more, may also be used as commutating diverts of the medium.
4. Valves for media with suspended particles If the media has suspended particles, it is best to use a sliding valve with wiper action along its sealing surface. Such as flat gate valve
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