Installation 1. Before valve installation, you should carefully check the model used by the valve, and design specifications are consistent; 2, depending on the model and the factory manual check valve controls whether the valve under the conditions required by the application; 3, when the valve lifting, rope should be tied in body and bonnet flange connections, do not place tied to the wheel or the valve stem, so as not to damage the stem and hand wheel; 4, the installation of valves in...

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Test and inspection standards: GB / T13927-2008 American Standard valve test pressure: Test and inspection standards: API598 20 # steel test pressure temperature - pressure stage Note: 1, when the operating temperature is the temperature level intermediate values in the table, the available interpolation method to determine the maximum operating pressure. 2, when the main valve parts are made of plastic or non-metallic materials such as rubber mechanical properties and temperature limits...

试验与检验标准：GB/T13927-2008 美标阀门试验压力： 试验与检验标准：API598 20#钢的试验压力温度-压力级 注：1、当工作温度为表中温度级中间值时，可用内插法决定最大工作压力。 2、当阀门的主要零件有采用塑料橡胶等非金属材料或力学性能和温度极限低于表中的材料时，不能使用此表。 3、如用户需要详细技术资料及尺寸，请向生产厂家索取。

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1, the valve should pay attention to the storage environment, should be stored in dry and ventilated room, and blocked both ends of the path. 2, the valve should be checked regularly and remove dirt on it, apply anti-rust oil coating on its surface. 3. Install the valve after application, should carry out regular maintenance to ensure proper operation. 4, you should check the valve sealing surface wear, and according to the situation for repair or replacement. 5, check the stem and stem nut...

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The sealing performance of the valve is the valve part of the sealing ability to prevent media leaks, it is the valve of the most important technical performance indicators. Sealing valve has three parts: opening and closing pieces and valve seat sealing surface contacts between the two; and with the Department filler stem and the stuffing box; junction body and bonnet. Which is called before a leak within the leak, which is commonly known as Guan lax, it will affect the ability of the valve...

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GB / T 1047-2005 standard, the valve nominal diameter just a logo, represented by a combined symbol "DN" and numbers do not represent the nominal size of the valve diameter measured values, the actual diameter value of the valve consists of the standards-related provisions generally found (in mm) not less than 95% of the nominal value of size. Nominal size fraction Metric (symbol: DN) and imperial (symbol: NPS), GB valves metric, the US standard valve to English. Metric DN values ​​are as...

GB/T 1047-2005标准规定，阀门的公称通径只是一个标识，由符号“DN”和数字的组合表示，公称尺寸不能代表实测的阀门口径值，阀门的实际口径值由相关的各标准规定，一般实测值（单位mm）不得小于公称尺寸数值的95%。公称尺寸分公制（符号：DN）和英制（符号：NPS），国标阀门采用公制，美标阀门为英制。公制DN数值如下： 优先选用的DN数值如下： DN10 DN15 DN20 DN25 DN32 DN40...