进口轴流式止回阀，贯流式逆止阀慨述 Express with regret

轴流式止回阀（贯流式逆止阀）具有一般止回阀的功能外，它还设计有减震弹簧，具有消声，减震效果。独特的轴流式结构具有流阻小流量大，外形尺寸小等特点，是油气集输管网系统，特别是输油泵出口的优选阀门。它适用于油、气、水浆液等管道系统，防止介质逆流使用 RETZ The axial flow check valve has the function of a general check valve. Besides, it is also designed with a damping spring, which has the effect of noise elimination and shock absorption. The unique axial flow structure has the characteristics of small flow resistance, large flow and small overall dimensions. It is the optimal valve for oil and gas gathering and transportation pipeline system, especially for the outlet of oil pump. It is applicable to oil, gas, water slurry and other pipeline systems to prevent the medium from being used against the current

技术参数 Technical paramete

通径:1”~12” (DN25~300)

压力等级：ANSI/ASME 150Lb~600Lb(PN1.6~10.0 Mpa)

适用温度：-40~500℃

连接方式：法兰、对焊

进口轴流式止回阀，贯流式逆止阀结构特点StructureFeatures

弹簧的的推力使阀瓣在即使用无介质压力作用时，也能处理关闭位置 The thrust of the spring enables the disc to handle the closed position even when no medium pressure is applied

良好的支承方式使阀门无论处于什么安装位置时阀瓣和阀座均能良好对中，故阀门可任意角度安装  Good support mode enables the valve disc and valve seat to be well aligned no matter where the valve is installed, so the valve can be installed at any angle

阀套外形的流线型设计与体腔流线型设计的组合构成了轴流式止回阀流线型流道，精确的计算和设计使流道的过流面积充分且保持一致，压力损失小，流态稳定，无气蚀。阀瓣在介质流动时产生负压及弹簧推力下回座，无介质对阀瓣背面直接冲击；因此，轴流式止回阀是低噪音阀门 The streamline design of the valve sleeve shape and the streamline design of the body cavity constitute the streamline flow passage of the axial flow check valve. Accurate calculation and design make the flow passage have sufficient and consistent flow area, small pressure loss, stable flow pattern and no cavitation. When the medium flows, the valve clack will generate negative pressure and spring thrust to reseat, and no medium will directly impact the back of the valve clack; Therefore, the axial flow check valve is a low-noise valve

阀瓣前后两端支承和阀瓣轴的特殊表面处理及结构设计，克服了类似阀门使用过程中经常发生的卡阻现象，启闭平稳同时避免了因重力因素造成阀瓣对中性差，密封副受力不均，两次动作间密封副吻合部 位不一致而影响密封性能的缺陷，使密封副始终处于良好的受力和吻合状态 The special surface treatment and structural design of the supports at the front and rear ends of the valve clack and the valve clack shaft have overcome the blocking phenomenon that often occurs during the use of similar valves. The valve clack can be opened and closed smoothly, and at the same time, the valve clack can avoid the neutral difference caused by gravity, the uneven force on the sealing pair, and the defects that affect the sealing performance due to the inconsistent fitting position of the sealing pair between two actions, so that the sealing pair is always in a good stress and coincidence state

精确的设计使用弹簧推力在阀瓣处于关闭位置时略大于阀瓣重力及阀瓣和前后支承间的磨擦力之和，阀瓣既可在低压力及任意安装时回座密封，又能实现低压开启，减低泵启动载荷，保护泵的运行安全 Precise design uses spring thrust which is slightly greater than the sum of the gravity of the valve flap and the friction between the valve flap and the front and rear supports when the valve flap is in the closed position. The valve flap can not only be reseated and sealed at low pressure and at any time of installation, but also be opened at low pressure to reduce the starting load of the pump and protect the safe operation of the pump.

防火设计，符合API 6FA,阀门无介质外漏可能 The fire protection design conforms to API 6FA, and the valve has no possibility of medium leakage

主要零件与材质Main Parts and Materials