产品结构特点Products design features ●阀体采用铸造结构。 The body uses a cast structure ●阀座采用O形密封圈密封和施加预紧力的浮动阀座结构，使阀门进出El双向密封；并且该结构的启闭力矩仅为普通阀门的l/2，能达到轻松开、关阀门。 The seat ring uses the floating seat ring structure with O-seal ting sealed and Pre-rightenmg fo rce apPIied to have mlet and outlet dual-way sealed；and the open-close moment wifh fhis structure is l/2 that of the common valves only，able to lightly open and close valves. ●阀座采用密封面上镶嵌PTFE，具有PTFE对金属和金属对金属的双重密封，PTFE密封面同时清除闸板脏物的作用。 The seat ring uses the sealing face inlaid with PTFE．so has dual seals of PTFE to metal and metal to metal，the PTFE sealing face also acts as removing the dirt on the wedge disc ●阀门的闸板，无论是全开或是全关始终与密封面吻合，密封面得到保护不受介质直接；中刷，从而延长使用寿命。 The wedge disc of the valve is always fitted with the sealing face whether in fullopen or fullclose status to have the sealing face Protected without being directly eroded by the medium so as to extend the duration. ●阀门在全开时，通道平滑为直线，流阻系数极小，无压力损失，可通毛球清扫管线。 When fully opened，the valve s channel is smooth and linear，with an extremely small flow resisting coefficient and no Pressure loss，and the Pipeline can be cleaned with hair-ball through it. ●阀门关闭时能自动卸掉内腔高压(详见工作原理图)，保证使用安全。 Automatic removal of the hlgh Pressure in the internal cavity when the valve is about to close(see the working Principle dlagram for the details)so as to ensure safety. ●采用封闭齿轮转动启闭指示机构，能长期清晰地反映阀门的启闭情况。 Use a sealed gear-driving open-close indicating mechanism，which is able to clearly show the open-close condition of the valvein along term. ●直埋式阀门外表面采用环氧煤沥青防腐处理，能与管线同寿命。 The external surface of the directly built-in valve is corrosion resisting treated with epoxy coal bitumen and can be the same duration as the Pipeline.
产品性能规范Products performance specification
压力等级 Pressure
常温试验压力(MPa) Testing pressure at constant ternperature(Mpa)
适用温度 Applicable temperature
适用介质 AppIicable medium
壳体试验 The shell testing
左密封 Left sealing
右密封 Right sealing
低压气密封Low Pressure air tightness
普通型 0rdinary type
抗硫型 Antisulphur type
公称压力(MPa) Nominal rating pressure (PN)
1.6
2.4
1.76
1.76
0.6
-29～121℃ 或按用户要求 -29～121℃ or upon the user requirement
石油、天然气、水 等非腐蚀性介质 Petroleum natural gas warer etc non- corroslve media
含H2S、C02的石油、天 然气、水等腐蚀性介质 Petroleum，natural gas， water etc，containing H2S， C02 corrosive media
