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Industry expert: How to choose excellent valve?
From;    Author:Stand originally
Of all kinds valve chooses guidance

Brake a powerful person

Brake a powerful person is to regard as end medium is used, whole when a standard-sized sheet current and direct, the pressure loss that right now medium runs is the smallest. Brake a powerful person is applied to normally do not need to often be opened shut, and the operating mode that maintain flashboard a standard-sized sheet or shuts completely. Unwell be used at regarding as to adjust or reduce expenditure is used. To the medium that high speed flows, flashboard can cause the vibration of gate below local open state, and the sealing surface that vibration may injure flashboard and valve base again, and what reduce expenditure can make flashboard suffers medium is erosive. From configuration, main distinction is the form of uses sealed cell. According to the form of sealed component, often separate brake a powerful person into a few kinds of different types, be like: Brake of double flashboard of type of a powerful person of a powerful person of a powerful person of wedge formula switch, parallel form switch, brake of parallel double flashboard, wedge. The most commonly used form is a powerful person of wedge formula switch and a powerful person of parallel form switch.

Shut-off valve

The axes of lever of a powerful person of shut-off valve and valve base sealing surface are perpendicular. Open of lever of a powerful person or shut the journey opposite shorter, have very reliable cut off a movement, make this kind of valve very comfortable collaboration reachs reduce expenditure to use to cut off or adjust of medium. Once the valve of a powerful person of shut-off valve is in open state, between its valve base and sealing surface of valve of a powerful person no longer contact, have very reliable cut off a movement, close this kind of valve is very just to cooperate to reach reduce expenditure to use to cut off or adjust of medium.

Once shut-off valve is in open condition, there is a contact no longer between its valve base and sealing surface of valve of a powerful person, its sealing surface mechanical wear is consequently lesser, be repaired more easily as a result of the valve base of major shut-off valve and valve of a powerful person or change when sealed component need not tear open whole valve from cop come down, this solders to valve and cop the circumstance of an organic whole is very applicable. The direction of going from place to place when medium passes this kind of valve produced change, the obstruction of going from place to place because of this shut-off valve relatively valve of prep above other.

Commonly used shut-off valve has the following kinds: 1) horny pattern shut-off valve; In horny pattern shut-off valve, the fluid needs to change way only, the shut-off valve that as a result compares groovy structure at falling through the pressure of this valve is small. 2) open flow shut-off valve; In open flow or Y form shut-off valve, the flow path of body of a powerful person and mainstream path become one oblique line, the destruction of such flow condition degree wants than groovy shut-off valve small, the pressure loss that carries valve consequently is corresponding also small. 3) shut-off valve of force plunger type: The shut-off valve of this kind of form is groovy shut-off valve change model. In this valve, valve of a powerful person and valve base are based on design of force plunger principle normally. Valve of a powerful person burnishs force plunger and photograph of lever of a powerful person join, sealed be by what cover the implementation of two stretch sealing ring on force plunger. Two stretch sealing ring are separated with a ringer, the load that brings to bear on to go up in lid of a powerful person through building nut by a powerful person presses the sealing ring all round force plunger prison. Stretch sealing ring can change, can use various data to be made, this valve basically is used at " " or " close " , but stock is tailor-made formal force plunger or special ringer, also can use at moving section discharge.
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