This document, in conjunction with ISO 10297 and ISO 14246, specifies design, type testing, marking and manufacturing tests, and examinations requirements for quick-release cylinder valves intended to be fitted to refillable transportable gas cylinders, pressure drums and tubes which convey: — non-toxic; — non-oxidizing; — non-flammable; and — non-corrosive; compressed or liquefied gases or extinguishing agents charged with compressed gases to be used for fire-extinguishing, explosion protection, and rescue applications. NOTE 1 The main application of such quick-release cylinder valves is in the fire-fighting industry. However, there are other applications such as avalanche airbags, life raft inflation and similar applications. NOTE 2 Where there is no risk of ambiguity, gas cylinders, pressure drums and tubes are addressed with the collective term "cylinders" within this document. This document covers the function of a quick-release cylinder valve as a closure. This document does not apply to quick-release cylinder valves for cryogenic equipment and for liquefied petroleum gas (LPG). This document does not apply to quick-release cylinder valves if used as the main closure of portable fire extinguishers because portable fire extinguishers are not covered by transport regulation. Quick-release cylinder valves of auxiliary refillable propellant gas cylinders used within or as part of portable fire extinguishers are covered by this document, if these cylinders are transported separately, e.g. for filling (see UN Model Regulations, Chapter 3.3, Special Provision 225, second note[1]).
EN ISO 17871:2020由欧洲标准化委员会 IX-CEN 发布于 2020-08-19,并于 2020-11-30 实施,于 2021-02-28 废止。
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性能与优点介绍 滑动部件之间配有无油润滑轴承和导向环减少活塞与气缸的摩擦 避免密封圈与气缸的粘连,即使长时间不用也不会发生 插槽、阀套和拨叉都是不锈钢的,硬度超过50HRC能有较抵抗执行器内在的动力磨损 插槽与活塞间是滚动摩擦减少了摩擦 销轴的滚动摩擦使活塞与轴承间的直线运动变成圆周运动而无需齿轮减少了活塞与轴承间的摩擦,也因此减少了零部件的损耗 增强了阀门开启与关闭过程的扭矩...
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产品名称:QDY421F-25 液动紧急切断阀,液动切断阀结合了截止阀,止回阀和液动阀门的优点,采用截止阀的升降结构和止回阀防止介质倒流的原理。切断阀具有的技术性能,低负荷损失和高可靠性,与远距离手摇油泵配套使用,利用手动液压控制阀门开启-关闭。...
压力显示:每个气缸都有安全阀和压力表,直观的显示每级的工作压力,使保养和故障排除 更简单 8. 充气接口 1:两条 420BAR 高压充气软管,并配有泄气阀的充气阀(可选配三条充气软管, 同时充三只气瓶) 9. 接口规格:充气阀配有两种规格的接口,G5/8 和 M22*1.5,可同时充巴固和依格的气瓶. 10. ...
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