| ： Product name : || Stainless steel pneumatic emergency shut-off valve || ： Product model : || QDQ421F |
： Driving method : || pneumatic || ： Connection form : || Flange |
| ： Structure form : || Straight-through || ： Sealing material : || Fluoroplastic |
| ： Pressure range : || 1.6-4.0MPa || ： Nominal diameter : || DN25-DN300 |
| ： Common materials : || stainless steel || ： Technical consultation : || 021-31007323 |
是国内著名〖 QDQ421F不锈钢气动紧急切断阀 〗制造商，也是国内大型【 切断阀 】生产商之一，公司自成立以来始终围绕客户的需求并持续创新，为广大的代理商和企业客户提供〖QDQ421F不锈钢气动紧急切断阀 〗解决方案，质量可靠，价格实惠，故畅销全国各地，欢迎新老客户来电，来函，我们将为您提供最优质的服务。 Hushan Valve Manufacturing (Shanghai) Co., Ltd. is a well-known domestic manufacturer of [ QDQ421F stainless steel pneumatic emergency cut-off valve ] and one of the large domestic [ cut-off valve ] manufacturers. Since its establishment, the company has always focused on customer needs and continued innovation for the majority Agents and corporate customers provide the "QDQ421F Stainless Steel Pneumatic Emergency Shut-off Valve" solution, which is reliable in quality and affordable, so it sells well all over the country. Welcome new and old customers to call us and email us.
-- 简介： I. Stainless steel pneumatic emergency shut-off valve -- Introduction:
不锈钢气动紧急切断阀 安装在燃气管道的出口处，在设备故障、腐蚀破坏、密封失效 , 出现大量危险物料泄漏 , 酿成 ( 或可能酿成 ) 火灾、或中毒事故时 , 用以切断上游危险物料来源 , 避免事故范围扩大 , 控制事故影响 , 减少事故损失。 QDQ421F stainless steel pneumatic emergency shut-off valve is installed at the outlet of the gas pipeline . It is used to cut off the upstream danger in the event of equipment failure, corrosion damage, seal failure , a large number of dangerous material leakage , causing ( or possibly causing ) fire or poisoning accidents. Material sources , to avoid the expansion of the accident scope , control the impact of the accident , and reduce accident losses.
不锈钢气动紧急切断阀是自动化系统中执行机构的一种阀门，采用截止阀的升降结构和止回阀防止介质倒流的原理，由多弹簧气动薄膜执行机构或浮动式活塞执行机构与调节阀组成，接收调节仪表的信号，控制工艺管道内流体的切断、接通或切换。 QDQ421F stainless steel pneumatic emergency cut-off valve is a valve of the actuator in the automation system. It adopts the lifting structure of the stop valve and the principle of the check valve to prevent the medium from flowing backward. It consists of a multi-spring pneumatic diaphragm actuator or a floating piston actuator and a regulating valve. ， Receive the signal of regulating instrument to control the cut-off, connection or switching of fluid in the process pipeline. It has the characteristics of simple structure, sensitive response and reliable movement. Can be widely used in petroleum, chemical, metallurgical and other industrial production sectors.
不锈钢气动紧急切断阀具有极佳的技术性能，低负荷损失和高可靠性，安装在液化气，天燃气，液氨与气相管路上，与远距离气源配套使用，利用气源控制阀门开启 - 关闭 , 以便在管道或储罐上发生大量泄漏甚至起火时，工作人员迅速通过控制室触动开关，电磁阀瞬间通电，气源快速通过关闭阀门。 QDQ421F stainless steel pneumatic emergency shut-off valve has excellent technical performance, low load loss and high reliability. It is installed on liquefied gas, natural gas, liquid ammonia and gas phase pipelines. It is used with long-distance gas sources to control the valve opening. -Shut down so that when a large amount of leakage or even fire occurs on the pipeline or storage tank, the staff quickly touches the switch through the control room, the solenoid valve is instantly energized, and the gas source quickly passes through the closed valve.
不锈钢气动紧急切断阀 -- 工作要求： Second, stainless steel pneumatic emergency shut-off valve - working requirements:
天燃气紧急切断阀气源入口按装一只二位三通电磁阀，利用远程电器控制台控制阀门开关。 1. The natural gas emergency shut-off valve is equipped with a two-position, three-way solenoid valve at the inlet of the gas source, and the valve is controlled by a remote electrical console.
电磁阀通电进气 , 阀门自动关闭 . 2.The solenoid valve is energized and the valve is closed automatically .
手动控制电磁阀 ( 按下红色卡子 ) 进气 , 阀门迅速关闭 . 3.Manually control the solenoid valve ( press the red clip ) to feed air , and the valve closes quickly .
阀门安装方向 : 高进低出 4. Valve installation direction : high-in and low-out
不锈钢气动紧急切断阀 -- 规范标准： Three, stainless steel pneumatic emergency shut-off valve - normative standards:
1.6/4.0Mpa Pressure rating: 1.6 / 4.0Mpa
≤2.0Mpa Cylinder working pressure: ≤2.0Mpa
Operating temperature -40~+80 ℃ : -40 ~ + 80 ℃
Cylinder using medium: ` 无水空气 Nitrogen`anhydrous air
Use of media: Natural gas, liquefied gas, gas
≤5 秒 Closing time: ≤5 seconds
≥0.4-0.8Mpa Cylinder closing pressure: ≥0.4-0.8Mpa
Body: Cast steel, stainless steel. 304,316,316L
50CrVA( 弹簧钢 ) Spring: 50CrVA ( spring steel )
Cylinder, piston: ductile iron
O 型圈：聚四氟乙烯，丁晴橡胶 Sealing ring, O -ring: Teflon, NBR
-- 操作规程： Four, stainless steel pneumatic emergency shut-off valve - operating rules:
、紧急切断阀气缸开启压力 ≥0.3-0.6Mpa ，气缸的日常工作压力，不得低于 0.4MPa, 保证阀门的正常工作。 1. The opening pressure of the emergency shut-off valve cylinder is ≥0.3-0.6Mpa . The daily working pressure of the cylinder must not be lower than 0.4MPa to ensure the normal operation of the valve.
、阀门在日常工作中处于常开状态，电磁阀线圈处于断电状态，不消耗电能。 2. The valve is normally open in daily work, and the solenoid valve coil is in a power-off state, which does not consume power.
、当事故发生时，阀门线圈瞬时通电，触发阀门快速关闭，进入自锁状态。 3. When the accident occurs, the valve coil is energized instantaneously, triggering the valve to close quickly and enter the self-locking state.
、当工作人员处理完事故，电磁阀线圈断电 , 重新开启阀门，才会恢复供气。 4. When the staff has finished handling the accident, the solenoid valve coil is powered off and the valve is reopened to resume the gas supply.
、工作环境温度： -15 ～ 60 ℃ 5. Working environment temperature: -15 ～ 60 ℃