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HVAC design, why is less than DN50 of pipe gate valve and cut-off valve,
- I don't know why it was designed. Provide you with some information you refer to, I do not know if it works for you1, stop valve and gate valve are very expensive, more than DN50 can make a lot of money2, butterfly valve is only more than DN50, no small, there may be, but I almost can not see the market.3, like DN150, DN200 such cut-off valve, gate valve is very large, and the butterfly valve is relatively light, installation can save the cost of the block, the valve itself saves too much money.4, but most of the butterfly valve used for a long time are closed.s
Why does the fire hydrant box in the air defense area need to be added with gate valves?
- 3, protective valve should be used for stainless steel or copper gate valve or cut-off valve;4, air defense enclosure structure, the distance from the proximal end of the valve should not be greater than 200mm. Valve should have obvious signs of opening and closing.s
What does valve qz45x - 10q mean?
- Crown valve pressWhat does Q stand for? I'm not sure. It's probably made of ductile iron"Z" means "gate valve"4 represents flange connection5 represents the dark bar (1 represents the Ming pole)X stands for rubber seal and soft seal10q stands for 10 pressures
The legend of gate valve and stop valve
- Compared with the cut-off valve, the main advantage is that the flow resistance is small, the flow resistance coefficient of ordinary gate valve is about 0.08~0.12, while the ordinary cut-off valve resistance coefficient is about 3.5~4.5. Opening, closing force is small, the medium can flow in two directions. The disadvantage is that the structure is complex and the height is large. The sealing surface is easy to wear. The sealing surface of the valve must be forced to close the valve to achieve sealing, in the same caliber, work pressure and the same drive device, the drive valve torque is 2.5~3.5 times the gate valve. This point should be noticed when adjusting the torque control mechanism of the electric valve.The sealing surface of the stop valve contacts each other only when the valve is completely closed, and the relative sliding amount between the valve core and the sealing surface is very small, so that the wear of the sealing cover is very small. The sealing surface of the valve cover, mostly due to the spool and sealing surface before the debris, or because of the closed state is not tight, causing the medium of high-speed erosion caused by.s
What does Z941H-25DN250 mean by electric gate valve (excluding electric equipment)?
- Cast steel flanged gate valve 25 pressure bore 250s
What does gate z41t-10 150 mean?
- According to JB/T308-2004 "valve type programming method"Z gate valve4 flange connection1 Ming wedge single gateT sealing cover material is copper alloy10 nominal pressure PN10PN16 below no marked valve body code, body material is gray cast iron150 nominal size DN150s
What is the difference between gate valve and gate valve? Is it the same valve?
- The same, very few people call gate valve, all call gate valve.s
What does P54100V mean in power station gate valve Z960Y-P54100V?!
- P work pressureP54 temperature at 540 degrees of work pressureThe pressure at P54 100 is 540 at the temperature of 100barV valve for chromium molybdenum vanadium steelP54 pressure 140V temperature at 540 DEG C for 140bar valve for chromium molybdenum vanadium steelP54 pressure 170V temperature at 540 DEG C for 170bar valve for chromium molybdenum vanadium steelFrom the JB/T4018 "valve type model preparation method"The standard unit is MPa, but it is usually used in bars
How about the market of truck air compressors
- There is no doubt that truck air compressors are widely used in many construction fields, mining fields and so on. They are playing an increasingly important role in the industry. ...
Cordless air compressors are very important for aquarium
- Cordless air compressors represent the air pumps used in the aquarium, they can provide enough and consistent air for these aquarium, so as to ensure good conditions and living env...
What does clump meter measure
- The invention of clump meter provides us with a lot of convenience. If we would like to use clump meter in perspective, We should know that what does clump meter measure. Apart fro...
Introduction to structure and working principle of air compressor filters
- Air compressor filters are important metering pumps. They are now widely used in many places. For example, in industrial construction fields, we can use air compressor filters to c...
Maintenance precautions of electric air pumps for inflatables
- Electric air pumps for inflatables are now becoming more and more popular among the public. We can use electric air pumps for inflatables in many fields, such as construction field...