原文：
该标准适用于公称压力为PN1.0MPa－PN4.0MPa，公称通径为DN50mm－DN1200mm的多功能水泵控制阀。 　　现将标准技术要求介绍如下： 　　1　压力——温度度级 　　多功能水泵控制阀的压力——温度等级由壳体、内件及控制管系统材料的压力——温度等级确定。多功能水泵控制阀在某一温度下的{zd0}允许工作压力取壳体、内件及控制管系统材料在该温度下{zd0}允许工作压力值中的小值。 　　1.1　铁制壳体的压力—— 温度等级应符合GB/T17241.7的规定。 　　1.2　钢制壳体的压力——温度等级应符合GB/T9124的规定。 　　1.3　对于GB/T17241.7、GB/T9124未规定压力——温度等级的材料，可按有关标准或设计的规定。 　　2　阀体 　　2.1　阀体法兰 　　法兰应与阀体整体铸成。铁制法兰的型式和尺寸应符合GB/T17241.6的规定，技术条件应符合GB/T17241.7的规定；钢制法兰的型式和尺寸应符合GB/T9113.1的规定，技术条件应符合GB/T9124的规定。 　　2.2　阀体结构长度见表1。 　　2.3　阀体的最小壁厚 　　铸铁件阀体的最小壁厚应符合GB/T13932－1992中表3的规定，铸钢件阀体的最小壁厚应符合JB/T8937－1999中表1的规定。 　　3　阀盖　膜片座 　　3.1　阀盖与膜片座、膜片座与阀体的连接型式应采用法兰式。 　　3.2　膜片座与阀体的连接螺栓数量不得少于4个。 　　3.3　阀盖与膜片座的最小壁厚按2.3的要求。 　　3.4　阀盖与膜片座的法兰应为圆形。法兰密封面的型式可采用平面式、突面式或凹凸式。 　　4　阀杆、缓闭阀板、主阀板 　　4.1　缓闭阀板与阀杆应连接紧固、可靠。 　　4.2　缓闭阀板与主阀板的密封型式应采用金属密封的型式。 　　4.3　主阀板与阀杆必须滑动灵活、 可靠。 　　4.4　主阀板与主阀板座的密封可采用金属密封和非金属密封两种型式。 　　5　膜片 　　5.1　膜片性能应符合表2(见下页)的规定。 　　5.2　膜片的外观质量应符合HG/T3090的规定。 　　5.3　当应用于生活饮用水时，膜片材料的安全性应符合GB/T17219的规定。 　　6　控制管系统 　　控制管系统的各元件应能承受阀门的{zg}工作压力，各部位不得发生泄漏。 　　7　材料 　　7.1　主要零部件材料的选用 宜按JB/T5300的规定。 　　7.2　铜合金铸件应符合GB/T12225的规定；灰铸铁铸件应符合GB/T12226的规定，其抗拉强度应不小于200MPa；球墨铸铁铸件应符合GB/T12227的规定；碳素钢铸件应符合GB/T12229的规定；奥氏体钢铸件应符合GB/T12230的规定。 　　7.3　钢制多功能水泵控制阀铸件外观质量应符合JB/T7927的规定，铁制多功能水泵控制阀铸件外观质量参照JB/T7927的规定。 　　8　壳体强度 　　多功能水泵控制阀的壳体强度应符合GB/T13927的规定。 　　9　密封性能 　　多功能水泵控制阀的密封性能应符合GB/T13927的规定。 　　10　清洁度 　　多功能水泵控制阀的清洁度应符合JB/T7748的规定。 　　11　涂装 　　当应用于生活饮用水时，多功能水泵控制阀内腔涂装材料的安全性应符合GB/T17219的规定。外表面涂装不作规定，特殊要求在订货合同中注明。

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This standard applies to nominal pressure PN1.0MPa-PN4.0MPa, nominal diameter as DN50mm-DN1200mm multifunctional pump control valve. Now the standard technical requirements are described below: 1 Pressure - temperature degree-level Multifunctional pump control valve of the pressure - temperature rating from the shell, internal parts and control tube system material pressure - temperature rating determined. Multifunctional Pump Control Valve in a temperature maximum allowable working pressure to take the shell, internal control management system of material parts and the temperature at the maximum allowable working pressure values of the small value. 1.1 iron shell of the pressure - temperature rating shall comply with the provisions of GB/T17241.7. 1.2 The steel shell of the pressure - temperature rating shall comply with the provisions of GB/T9124. 1.3 for GB/T17241.7, GB/T9124 does not provide the pressure - temperature rating of the material, according to the relevant standards or design requirements. 2 body 2.1 Valve Flange The whole body should be cast flange. Iron flange type and size shall comply with the provisions of GB/T17241.6, technical terms should be consistent with the provisions of GB/T17241.7; steel flange types and sizes should be consistent with the provisions of GB/T9113.1 and technological conditions shall comply with the provisions of GB/T9124. 2.2 The valve body length in table 1. The minimum wall thickness of 2.3 body The minimum wall thickness of cast iron body should comply with the provisions of GB/T13932-1992 Table 3, the minimum wall thickness of cast steel valve body should comply with the provisions of JB/T8937-1999 Table 1. Diaphragm valve cover 3 seat 3.1 valve cover and the diaphragm seat, diaphragm valve seat and the connection type should be flanged. 3.2 diaphragm and valve seat shall not be less than the number of connection bolts 4. 3.3 valve cover and the diaphragm seat minimum wall thickness requirements in accordance with 2.3. 3.4 valve cover and the diaphragm seat flange should be rounded. Flange sealing surface of the type can be used planar face or style or uneven type. 4 stem, slow closing valve plate, the main valve plate 4.1 board and slow closing valve stem should be connected tightening and reliable. 4.2 slow closing valve plate and the main valve plate seal type metal sealing type should be used. 4.3 The main valve plate and valve stem must slide a flexible and reliable. 4.4 The main valve seat plate and the main valve plate metal seal and the seal can use two types of non-metallic seal. 5 Diaphragm 5.1 patch performance should be consistent with Table 2 (see next page) requirements. 5.2 patch quality should meet HG/T3090 appearance requirements. 5.3 When used in drinking water, the membrane material should be consistent with GB/T17219 security requirements. 6 Control Management System Control management system, each component should be able to withstand the maximum working pressure valve, each part shall not leak. 7 Materials 7.1 The main components of materials used should by JB/T5300 requirements. 7.2 copper alloy castings shall comply with the provisions of GB/T12225; GB/T12226 gray iron castings shall meet the requirements, its tensile strength shall be not less than 200MPa; ductile iron castings shall meet the requirements GB/T12227; carbon steel castings should be consistent GB/T12229 requirements; austenitic steel castings shall comply with the provisions of GB/T12230. 7.3 Multifunctional Pump Control Valve casting steel surface quality should be consistent with the provisions of JB/T7927, multifunctional pump control valve cast iron appearance quality of the light JB/T7927 requirements. 8 shell strength Multifunctional Pump Control Valve GB/T13927 shell strength should be consistent with the requirements. 9 sealing performance Multifunctional Pump Control Valve sealing performance should be consistent with the provisions of GB/T13927. 10 Cleanliness Multifunctional Pump Control Valve JB/T7748 cleanliness should meet the requirements. 11 Painting When applied to drinking water, the multi-pump control valve cavity coating material should be consistent with GB/T17219 security requirements. Outer surface coating is not provided for special requirements in order the contract.
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