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| Product Name：Gas globe valve |
| Product Classification：Globe valve |
| Product Introduction： |
Valve is forced closed valve, so the valve is closed, the valve must exert pressure to force the sealing surface does not leak. When the medium from the bottom of the valve into the valve, the operating force required to overcome the resistance, is the stem and packing friction and pressure from the media generated by the thrust force than the valve off the valve opening force, Therefore, the diameter of the stem to a large, otherwise the top stem bending failure occurs. |
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| Description |
Parameters |
Size Chart |
Application |
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1, simple structure, manufacturing and maintenance more convenient.
2, the working stroke is small, open and close a short time.
3, sealing, and sealing surface between the friction force is small, longer life expectancy.
4, the valve body structure in the form of straight-through, DC-and right-angle type. Straight-through is the most common structure, but its resistance to most fluids. DC-type fluid resistance is small, used for containing solid particles or the viscosity of the fluid. Use more angled body forging, for smaller circulation, high pressure cut-off valve.
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Materials for main parts
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Body |
Stem,disc |
Sealing face |
Packing |
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Carbon
steel |
Stainless steel |
Stainless steel |
PTFE |
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Nylon |
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Performance Specifications
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Norminal pressure PN |
JIS10K |
JIS20K |
MPa |
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1.6 |
2.5 |
4.0 |
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Shell test pressurePN |
2.4 |
3.75 |
6.0 |
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High pressure seal test |
1.76 |
2.75 |
4.4 |
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Medium |
Liquefied petroleum gas,natural gas |
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Temperature |
-40∽+80℃ |
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Standard flange connection |
JB/T 79-94 | |
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Main dimensions and connection dimensions
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PN |
DN |
L |
H |
D |
D1 |
D2 |
b |
f |
Z-φd |
D0 |
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15 |
130 |
207 |
95 |
65 |
45 |
16 |
2 |
4-14 |
120 |
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20 |
150 |
217 |
105 |
75 |
55 |
16 |
2 |
4-14 |
140 |
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25 |
160 |
219 |
115 |
85 |
65 |
16 |
2 |
4-14 |
160 |
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32 |
190 |
280 |
135 |
100 |
78 |
18 |
2 |
4-18 |
180 |
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2.5MPa |
40 |
200 |
330 |
145 |
110 |
85 |
18 |
3 |
4-18 |
200 |
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4.0MPa |
50 |
230 |
350 |
160 |
125 |
100 |
20 |
3 |
4-18 |
240 |
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10K |
65 |
290 |
400 |
180 |
145 |
120 |
22 |
3 |
8-18 |
280 |
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20K |
80 |
310 |
430 |
195 |
160 |
135 |
22 |
3 |
8-18 |
320 |
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100 |
350 |
465 |
230 |
190 |
160 |
24 |
3 |
8-23 |
360 |
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125 |
400 |
502 |
270 |
220 |
188 |
28 |
3 |
8-25 |
400 |
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150 |
480 |
560 |
300 |
250 |
218 |
30 |
3 |
8-25 |
440 |
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200 |
600 |
580 |
360 |
310 |
278 |
34 |
4 |
12-25 |
480 |
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產(chǎn)品外形及結(jié)構(gòu)尺寸示意圖
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Working principal:
Globe valve, also called globe door, is the most widely used as a valve, the reason why it is popular is because the process of opening and closing the friction between the sealing surface is small, more durable, opening height is not easy to manufacture, easy maintenance, not only for low-voltage, and for high pressure.
Valve closure principle is to rely on bar valve pressure, the valve sealing surface and the valve seat sealing surface tightly, to prevent media circulation.
One-way valve can only medium flow direction when installing. Valve is greater than the gate length of the structure, and fluid resistance, long-term operation, sealing reliability is not strong.
globe valve installation and maintenance should note the following:
1, the hand wheel, lever operated valves can be installed in any position in the pipeline.
2, hand wheels, handles and Wei moving body does not allow for lifting purposes.
3, the flow of media should be consistent with the direction of the arrow shown in the valve body.
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