YQ98002 type filtering piston type safety pressure relief valve upstream pressure P1 through the constant pressure pilot valve and control valve into the upper part of the piston control room, and then through the constant pressure pilot valve to the outlet. Adjusting the positioning pilot valve can be set to open the pressure, when the pressure exceeds the set value, the constant pressure pilot valve open, the main valve is also followed to open, so as to discharge system pressure to ensure the safety of the system. Safe pressure relief function.
The valve is widely used in water supply and drainage, fire, power plants and other industries in the water pipeline, pressure fluctuations can be rapid response and rapid discharge, to prevent a sharp increase in pressure and damage to the pipeline and

零件名称	材质
阀体、阀盖	铸铁、铸钢、不锈钢
阀座	锡青铜、不锈钢
阀瓣	碳钢、不锈钢+丁腈橡胶
阀杆	铝青钢、铬不锈钢
活塞	铬不锈钢+丁腈橡胶
过滤网	不锈钢
弹簧	不锈钢

公称压力PN（MPa）	1.6	2.5
公称通径DN（mm）	40 50 65 80 100 150 200 250 300
强度试验压力（MPa）	2.40	3.75
密封试验压力（MPa）	1.76	2.75
整定压力范围	0≤1.6MPa	0≤2.5MPa
适用温度	0～100℃
环境温度	-30～350℃
适用介质	水

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    1. 设定压力准确，能长期稳定，一旦超压能迅速泄压。
    2. 弹性软密封，确保可靠，滴水不陋。
    3. Y形宽体腔筏，流阻小、抗汽蚀性强，无噪音。
    4. 活塞传动，平稳可靠。
    5. 可任何角度安装。
    6. 内外表面均喷涂环保涂层，确保产品确保产品防腐蚀及安全性。