Oxygen Globe Valve
Oxygen Globe Valve
Oxygen globe valve belongs to the forced sealing type valve, so when the valve is closed, pressure must be applied to the valve flap to force the sealing surface not to leak. When the medium from below the valve flap into the valve six, the operating force to overcome the resistance, is the friction of the valve stem and packing and the pressure generated by the medium of the thrust, the force to close the valve is greater than the force to open the valve, so the diameter of the valve stem should be large, otherwise it will occur the stem top bending of the fault.
Technical Specifications
Structure than the gate valve is simple, manufacturing and maintenance are more convenient.
The sealing surface is not easy to wear and abrasion, good sealing, opening and closing of the valve flap and the valve body sealing surface without relative sliding, so the wear and abrasion are not serious, good sealing performance, long service life.
When opening and closing, the flap stroke is small, so the height of the globe valve is smaller than the gate valve, but the length of the structure is longer than the gate valve.
Opening and closing torque is large, opening and closing more laborious, opening and closing time principal.
Fluid resistance, because the valve body media channel is more zigzag, fluid resistance, power consumption.
Medium flow direction Nominal pressure PN ≤ 16MPa, generally used downstream, the media from the valve flap upward direction; nominal pressure PN ≥ 20MPa, generally used countercurrent, the media from the valve flap upward downward flow. To increase the sealing energy. When used, the cut-off valve medium can only flow in one direction, can not change the direction of flow.
Full open valve flap is often subject to erosion.
Main Parts Materials:
Body | Cover | Flap:
Copper Alloy | Cast Chrome Nickel Titanium Stainless Steel
Stem:
Chrome Nickel Stainless Steel
Stem Nut:
Bronze
Brand
Jitai
Customized Processing
Yes
Material
Copper
Applicable Medium
Oxygen
Pressure Environment
Atmospheric
Operating Temperature
Ordinary Temperatures
Flow Direction
Commutation
Driving Method
Manually Operated
Parts And Accessories
Valve Body
Morphological
Other
Sealing Form
Other
Shape
Medium Size
Design Standard:
Design And Manufacture:GB12235
Flange Size:GB9113
Structure Length:GB12221
Inspection And Experiment:GB/T13927
Operating Principle:
When the handwheel is turned clockwise, the valve stem moves downward, the valve flap drops to make the sealing surface close, and cut off the access. Reversal is open, the valve stem to the highest point on the sealing effect.
This valve adds an upper seal. In the open state of the valve, with the packing together with two sealing effect, and the packing has a certain degree of protection.
This valve adopts nylon products as sealing surface, packing for soft molding packing, the upper seal is also a soft material, sealing performance is better.
1.6MPa Connection Size And Weight:
| DN | L | D | D1 | D2 | b | f | Z-d | H | H1 | DO | L1 | 重量(kg) |
| 15 | 130 | 95 | 65 | 45 | 14 | 2 | 4~14 | 240 | 100 | 6 | ||
| 20 | 150 | 105 | 75 | 55 | 14 | 2 | 4~14 | 270 | 100 | 8 | ||
| 25 | 160 | 115 | 85 | 65 | 14 | 2 | 4~14 | 270 | 125 | 10 | ||
| 32 | 180 | 135 | 100 | 78 | 16 | 2 | 4~18 | 280 | 160 | 14 | ||
| 40 | 200 | 145 | 110 | 85 | 16 | 3 | 4~18 | 350 | 160 | 20 | ||
| 50 | 230 | 160 | 125 | 100 | 16 | 3 | 4~18 | 400 | 320 | 35 | ||
| 65 | 290 | 180 | 145 | 120 | 18 | 3 | 4~18 | 530 | 360 | 50 | ||
| 80 | 310 | 195 | 160 | 135 | 20 | 3 | 8~18 | 560 | 400 | 65 | ||
| 100 | 350 | 215 | 180 | 155 | 20 | 3 | 8~18 | 618 | 450 | 80 | ||
| 125 | 400 | 245 | 210 | 185 | 99 | 3 | 8~18 | 675 | 450 | 106 | ||
| 150 | 480 | 280 | 240 | 210 | 24 | 3 | 8~23 | 743 | 560 | 125 | ||
| 200 | 600 | 335 | 295 | 265 | 26 | 3 | 12~23 | 850 | 640 | 254 | ||
| 250 | 650 | 405 | 355 | 320 | 30 | 3 | 12~25 | 975 | 270 | 720 | 380 | 418 |
| 300 | 750 | 460 | 410 | 375 | 30 | 4 | 12~25 | 1115 | 270 | 800 | 415 | 502 |
| 400 | 950 | 580 | 525 | 485 | 36 | 4 | 16-30 | 1380 | 280 | 900 | 465 | 980 |
| 450 | 1050 | 640 | 585 | 545 | 40 | 4 | 20-30 | 1530 | 350 | 495 | 1200 | |
| 500 | 1150 | 705 | 650 | 608 | 44 | 4 | 20-34 | 1700 | 400 | 525 | 1300 |
Cause Analysis:
Rust, dust, welding slag in the pipeline and the pipeline wall or valve friction to generate high temperature combustion.
This situation is related to the type of impurities, particle size and air velocity, iron powder is easy to burn with oxygen, and the finer the particle size, the lower the ignition point; the faster the gas speed, the more likely to burn.
Pipes or valves in the presence of grease, rubber and other low-flammability substances, in the local high temperature ignition.
Specifications:
Structure than the gate valve is simple, manufacturing and maintenance are more convenient.
The sealing surface is not easy to wear and abrasion, good sealing, opening and closing of the valve flap and the valve body sealing surface without relative sliding, so the wear and abrasion are not serious, good sealing performance, long service life.
When opening and closing, the flap stroke is small, so the height of the globe valve is smaller than the gate valve, but the length of the structure is longer than the gate valve.
Opening and closing torque is large, opening and closing more laborious, opening and closing time principal.
Fluid resistance, because the valve body media channel is more zigzag, fluid resistance, power consumption.
Medium flow direction Nominal pressure PN ≤ 16MPa, generally used downstream, the media from the valve flap upward direction; nominal pressure PN ≥ 20MPa, generally used countercurrent, the media from the valve flap upward downward flow. To increase the sealing energy. When used, the cut-off valve medium can only flow in one direction, can not change the direction of flow.
Full open valve flap is often subject to erosion.
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