A21H is applicable to the equipment or pipeline of water, air, steam and other media with working temperature ≤200℃; A27Y is applicable to the equipment or pipeline of corrosive media with working temperature ≤200℃ as an overpressure protection device; A28H(Y) is applicable to the equipment or pipeline of air, steam, water, nitrogen-hydrogen mixture and other media with working temperature ≤200℃; A28Y-P/R is suitable for equipment or pipeline with working temperature ≤200℃ and corrosive medium as overpressure protection device.
Read moreHow to use the manual and automatic brass ball valves? 1. Normally closed models energized to open, power failure to close. 2. Operation time is generally 6-15 seconds. What if there is a sudden power failure? 1. Switch the automatic mode button to manual mode. 2. Manually operate the switch. What are the advantages of manual automatic integrated brass ball valve? 1. Strong corrosion resistance: suitable for piping systems with corrosive media. 2. Good thermal conductivity: for systems that require a rapid response to temperature changes. 3. High temperature resistance: copper ball valve is suitable for relatively high temperature working environment. 4. Good sealing performance: The one-piece design reduces the risk of leakage and improves sealing performance. 5. Ease of operation: Copper ball valves can be operated manually or automatically, making it easy for users to control them as needed.
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Read moreThis is the fire pump room. Behind it is the fire fighting pool. This pipe is the suction pipe of the fire pump. The suction pipe is equipped with an rising stem gate valve. How can you tell if it's open or closed? Now that the rod is leaking. It's open. The valve plate is now lifted up and the water is flowing freely. When the handwheel is turned. The stem is not leaking out. The valve plate slams down like a guillotine. And the water is blocked. The valve is in a closed position. So we require this valve to be normally open.
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