Three piece ball valve and gate valve are belong to the same type of valve, the difference in its closure is a sphere, the sphere around the center line of the body to achieve the opening and closing of a valve. Three piece ball valve in the pipeline is mainly used to do the cutting, distribution and change the direction of the flow of media.
Note: parameters are for reference only, or are not full. Valve can be used in accordance with the requirements of different pressure, material, caliber. Specific please contact or online advisory contact.
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Serial number
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Part name
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Texture of material
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|
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Stainless steel
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carbon steel
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1
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valve body
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Stainless steelCF8M
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carbon steel WCB
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2
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Seal ring
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Teflon PTFE
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Teflon PTFE
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3
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Valve cover
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Stainless steelCF8M
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carbon steel WCB
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4
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sphere
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Stainless steelSS316
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Stainless steelSS304
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5
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The stem
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Stainless steelSS316
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Stainless steelSS316
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6
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Nut
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Stainless steelSS304
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FCD45
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7
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Washer
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Stainless steelSS304
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FCD45
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8
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Handle sleeve
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Plastic
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Plastic
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9
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Handle
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Stainless steelSS304
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Stainless steelSS304
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10
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Stem nut
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Stainless steelSS304
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B7
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11
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Washer
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Stainless steelSS304
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Stainless steelSS304
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12
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Packing gland nut
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Stainless steelSS304
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FCD45
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13
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filler
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Teflon PTFE
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Teflon PTFE
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14
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Thrust washer
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Teflon PTFE
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Teflon PTFE
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15
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filler
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Teflon PTFE
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Teflon PTFE
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16
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Bolt
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Stainless steelSS304
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B8
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Nominal pressure application specification: applicable temperature range: -20~232 DEG ~350 DEG 1.6-6.4MPa suitable medium: water, oil, gas and some corrosive liquid (W.O.G): G NPT.BSPT.BSP.DIN259/2999 three screw type ball valve, three ball valve manufacturers, three valve price.
Three piece ball valve has the following advantages:
1 fluid resistance is small, and its resistance coefficient is equal to that of the same length.
2 simple structure, small size, light weight.
3 close and reliable, ball valve sealing surface material widely used plastic, good sealing, in the vacuum system has also been widely used.
4 easy operation, open and close rapidly, from fully open to fully closed as long as 90 degree rotation, facilitate remote control.
5 maintenance convenient, simple structure, the sealing ring is generally active, demolition and replacement are more convenient.
6 in the fully open or fully closed, the ball and valve seat sealing surface and the dielectric isolation, the media through, will not cause the valve sealing surface erosion.
7 wide range of applications, from small to a few millimeters diameter, large to a few meters, from high vacuum to high pressure can be applied. Flange ball valve, flange gate valve, knife gate valve
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SIZE
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1/4″
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3/8″
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1/2″
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3/4″
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1″
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11/4″
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11/2″
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2″
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21/2″
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3″
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4″
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D
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11.6
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12.7
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15
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20
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25
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32
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38
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50
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65
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80
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100
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L
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68
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68
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72
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85
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90
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112
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120
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145
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185
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210
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268
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H
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100
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100
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130
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130
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165
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165
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190
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190
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250
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250
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280
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E
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100
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100
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130
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130
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165
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165
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190
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190
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250
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250
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280
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Weight WT（g）
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400
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405
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640
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890
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1160
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2195
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2940
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4865
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7000
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10700
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19350
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According to the structural form of the ball valve can be divided into:
A floating ball ball valve: ball valve ball is floating in the medium pressure, the ball can produce a certain displacement and pressure in the export side of the sealing surface, to ensure that the export side seal. Floating ball valve is simple in structure, good sealing, but the sphere to bear the load of the working medium to all pass to the outlet of the sealing ring, so to consider whether the sealing ring material can withstand the work load of the sphere medium. This structure is widely used in medium and low pressure ball valve.
Two, fixed ball valve: ball valve ball is fixed, the pressure does not produce movement. Fixed ball valve with a floating seat, by the media pressure, the valve seat to move, so that the sealing ring on the ball, in order to ensure that the seal. Usually with the ball in the upper and lower shaft with bearings, operating torque, suitable for high pressure and large diameter of the valve. In order to reduce the valve operating torque and increase the reliability of the seal, the valve seal, the sealing surface between the pressure injection of special lubricating oil, to form a layer of film that enhances the sealing, and reduce operating torque, more suitable for large-diameter high-pressure valve.
Three, elastic ball valve: ball valve ball is elastic. Sphere and valve seat ring are made of metal materials, sealing pressure is very large, depending on the pressure of the medium itself has reached less than the requirements of the seal must be applied. This valve is suitable for high temperature and high pressure medium. An elastic ball is provided with an elastic groove at the lower end of the inner wall of the ball. When the channel is closed, the ball is opened and the valve seat is pressed to seal by the wedge head of the valve rod. Before turning the ball to loosen the wedge head, the ball will be restored to the original shape, so that a small gap between the ball and the seat, you can reduce the friction of the sealing surface and operating torque.
Ball according to their channels can be divided into straight through position three and right angle type. After two kinds of ball valve for the distribution of media and change the flow of media.
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