進口軸流式止回閥，貫流式逆止閥慨述 Express with regret

軸流式止回閥（貫流式逆止閥）具有一般止回閥的功能外，它還設計有減震彈簧，具有消聲，減震效果。獨特的軸流式結構具有流阻小流量大，外形尺寸小等特點，是油氣集輸管網系統，特別是輸油泵出口的優選閥門。它適用于油、氣、水漿液等管道系統，防止介質逆流使用 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

技術參數 Technical paramete

通徑:1”~12” (DN25~300)

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

適用溫度：-40~500℃

連接方式：法蘭、對焊

進口軸流式止回閥，貫流式逆止閥結構特點StructureFeatures

彈簧的的推力使閥瓣在即使用無介質壓力作用時，也能處理關閉位置 The thrust of the spring enables the disc to handle the closed position even when no medium pressure is applied

良好的支承方式使閥門無論處于什么安裝位置時閥瓣和閥座均能良好對中，故閥門可任意角度安裝  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

閥套外形的流線型設計與體腔流線型設計的組合構成了軸流式止回閥流線型流道，精確的計算和設計使流道的過流面積充分且保持一致，壓力損失小，流態穩定，無氣蝕。閥瓣在介質流動時產生負壓及彈簧推力下回座，無介質對閥瓣背面直接沖擊；因此，軸流式止回閥是低噪音閥門 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

閥瓣前后兩端支承和閥瓣軸的特殊表面處理及結構設計，克服了類似閥門使用過程中經常發生的卡阻現象，啟閉平穩同時避免了因重力因素造成閥瓣對中性差，密封副受力不均，兩次動作間密封副吻合部 位不一致而影響密封性能的缺陷，使密封副始終處于良好的受力和吻合狀態 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

精確的設計使用彈簧推力在閥瓣處于關閉位置時略大于閥瓣重力及閥瓣和前后支承間的磨擦力之和，閥瓣既可在低壓力及任意安裝時回座密封，又能實現低壓開啟，減低泵啟動載荷，保護泵的運行安全 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.

防火設計，符合API 6FA,閥門無介質外漏可能 The fire protection design conforms to API 6FA, and the valve has no possibility of medium leakage

主要零件與材質Main Parts and Materials