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Van điện từ, van khí,ZCRB electromagnetic emergency shut-off valve gas emergency shut-off valve DN25 32 40 50 65 80 100
Tình trạng sản phẩm:
First, the gas emergency shut-off valve - an overview
ZCRB series gas emergency shut-off valve is a new type of safety matching device for gas pipeline engineering, mainly used in the following occasions:
1. Connect to the flammable gas leak monitoring instrument. When the instrument detects the leakage of flammable gas, it automatically closes the main gas supply valve, cuts off the supply of gas, and timely stops the occurrence of a vicious accident.
2. Connect to the limit temperature (or pressure) safety controller of the thermal equipment. When the temperature or pressure of the detection point in the equipment exceeds the set limit value, the air supply valve is automatically closed quickly to stop the supply of fuel.
3. Connect to the central fire alarm system of the high-rise building. When a fire occurs in the building, the gas supply in the building is automatically cut off to prevent the gas explosion.
4. Set BZCK gas emergency shut-off valve in the gas supply pipe network of the city or factory, which can be centrally controlled in the central control room, remotely remotely controlled, and emergencyly shut down the pipeline at the accident site.
This series of products has excellent technical performance, low load loss and high reliability. It is suitable for flammable gases such as gas, natural gas and liquefied petroleum gas. It is widely used in gas supply pipe network systems, gas heat plant workshops, gas boiler rooms and residential facilities.
Second, the valve function and working principle
This series of valves is a normally open pulse-trigger type solenoid valve with accident self-locking and manual reset function.
1. The valve is in the normally open state during daily work, and the solenoid valve coil is in a power-off state and does not consume electrical energy.
2. When the accident occurs, the valve coil is energized instantaneously, triggering the valve to close quickly and enter the self-locking state. At this time, even if the power is removed, the valve is still in the self-locking closed state and will not automatically re-open.
3. This valve adopts pilot-operated valve flap, which is easy to open. Even if the pressure reaches 6bar, it is very easy to open. The diameter is larger than DN125. The lever handle is used to make the valve reach the target switch with low effort and speed.
4. When the staff handles the accident and manually restarts the valve, the gas supply will be resumed.
A normally closed emergency shut-off valve with a power-off shut-off is also available upon request.
Third, the gas emergency shut-off valve - technical parameters:
1. Applicable to gas, natural gas and liquefied petroleum gas.
2, valve specifications: threaded connection G1/2 ", G3 / 4", G1 "; flange connection DN25 ~ 350
3, working pressure: 0.5bar ~ 6bar
4, electrical protection level: CEI IP65/IP67
5, explosion-proof grade: Eexm II T4 / Eexm II T5
6, working voltage and electric power: AC AC220V, 50Hz/14V; DC DC12V/8.5W, DC24V/8.5W
7, operating coefficient: uninterrupted output or pulse type
8, electrical connection: plug-in (regardless of positive and negative)
9, coil power: ≤ DN100, AC AC 220V at 20 ° C, 50Hz / 24VA DC DC24V, / 24W coil model: MF-1 (2 ≥ DN100, AC AC220V at 20 ° C, 50Hz / 90VA DC DC24V, / 85W coil model: ZCLF-1(2)
10, working environment temperature: -15 ~ 60 ° C
11, sealing material: NBR rubber
12, valve body material: brass, stainless steel, carbon steel
13, valve closing time: less than 1 second
Fourth, the manual reset operation process
When the valve is cut off and the pipeline leak is removed, the staff needs to manually pull up the manual reset lever when the manual reset is required. When the “click” is heard, the valve is completely opened.At this time, even if you release your hand, it will not be cut off. (unless the valve coil is energized again).
Note: Manual reset must be operated when the solenoid valve coil is de-energized.
Five, gas emergency shut-off valve - performance specifications:
| Pressure Level | Normal temperature test pressure | |||
| case | seal | Low pressure seal | ||
| Nominal pressure (MPa) | 1.6 | 2.4 | 1.76 | 0.6 |
| 2.5 | 3.75 | 2.75 | 0.6 | |
| 4.0 | 6.0 | 4.4 | 0.6 | |
| proper temperature | -15~60°C | |||
| | ||||
Sixth, gas emergency shut-off valve - main parts and materials:
| Part Name | material | |
| "-1 thread" | DN25-DN350 (flange) | |
| Valve body | brass | Carbon steel (stainless steel) |
| Self-locking body | Brass (aluminum alloy) | |
| Valve stem | stainless steel | stainless steel |
| Sealed river | NBR rubber | |
Seven, gas emergency shut-off valve - specifications and installation size table
| Specification (DN) | L | H | D | D1 | D2 | Z-¤d | Remarks |
| | | | | | | | |
| | | | | | | | |
| | | | | | | | |
| 25 | 160 | 180 | 115 | 85 | 65 | 4-¤14 | Flange connection |
| 32 | 180 | 200 | 135 | 100 | 78 | 4-¤18 | |
| 40 | 200 | 200 | 145 | 110 | 85 | 4-¤18 | |
| 50 | 230 | 220 | 160 | 125 | 100 | 4-¤18 | |
| 65 | 290 | 255 | 180 | 145 | 120 | 4-¤18 | |
| 80 | 310 | 320 | 195 | 160 | 135 | 8-¤18 | |
| 100 | 350 | 380 | 215 | 180 | 155 | 8-¤18 | |
| 125 | 400 | 405 | 245 | 210 | 185 | 8-¤23 | |
| 150 | 480 | 458 | 280 | 240 | 210 | 8-¤23 | |
| 200 | 600 | 530 | 335 | 295 | 265 | 8-¤23 | |
| 250 | 650 | 600 | 390 | 350 | 320 | 12-¤23 | |
| 300 | 750 | 650 | 440 | 400 | 368 | 12-¤23 | |
| 350 | 850 | 750 | 500 | 460 | 428 | 12-¤23 |
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