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- For removal of valve stem seal and lower valve spring guide. 可用于拆卸汽门油封或降低汽门弹簧。
- lower stem seal 下阀杆密封
- Backseat ? machined bonnet stem bushing provides back-up stem seal. 后座-经过精密加工的阀盖阀杆衬套实现后座阀杆密封。
- Maintenance-free O-ring stem seal with additional stem scrapper. 转柄具O形密合环,不需维护。并另有转柄清洁器。
- Two O-Rings in gland follower provide additional stem seal protection to assure tightness of less than 1 ppm. 密封压盖随动件内的两个O形环为阀杆提供更加安全的密封保护,以确保泄漏率不会超过百万分之一。
- The lower stem is encased in a spring which forces the stem away from the seat when the valve is opened. 下阀杆包裹在一个弹簧内部,当阀门开启时,弹簧迫使阀杆离开阀座。
- The lower stem pierces the diaphragms and is sealed to the diaphragms by e-beam welding. 下阀杆穿透横膈膜,通过电子束焊接来同横膈膜密封在一起。
- If necessary, the stem and stem seal may be removed from the bonnet by removing the retainer ring and handle and screwing the stem out the under-side of the bonnet. 如果必要的话,阀杆和阀杆密封可能要从阀帽上拆卸下来,要在阀帽的下方先拆卸挡圈和手柄,以及阀座上的螺丝。
- Remove spring cage, spring and washer. Remove bottom plug. Grasp upper and lower stem lock nut with wrench and loosen. Clean or replace any damaged or worn parts. 拆卸弹簧笼,弹簧和垫圈。拆卸底部塞。用扳手抓住上部和下部阀杆锁紧螺母并且松开。清洗或更换任何损坏或磨损部件。
- Replaceable hose filter and valve stem seals for field reliability. 可更换软管过滤器和阀门阀杆密封,使得现场应用可靠行更高。
- The upper stem mechanically connects to the lower stem, providing positive lift without the use of a spring. (See Figure 6. 上阀杆机械地同下阀杆连接在一起,不使用弹簧就提供了正的升力。
- Lower stem leaves 1- or 2-pinnately compound, leaflets few. Middle lobe of lower corolla lip obcordate, margin crenulate, apex emarginate. 下部茎叶1或2羽状复叶,小叶很少。倒心形的下部花冠唇,边缘具细圆齿,先端微缺的中部裂片。
- Petiole of lower stem leaves less than 3 cm; leaf blade broadly cuneate to attenuate at base; pedicels of lowermost flowers less than 2(-3.2) cm. 下部茎叶少于3厘米的叶柄;对渐狭的在基部宽楔形的叶片;最下的花少于2(-3.;2)厘米的花梗(22
- Safer and tighter stem seal. 更安全、更紧密地阀杆密封。
- Low stem head in wedge cavity reduces height and weight of valve. Design pioneered by Velan. 楔腔内的低阀杆头,降低了阀门的高度,减少了阀门的重量。这些结构设计也是由Velan首创。
- When the handwheel is rotated to the closed position the upper stem pushes on the diaphragms, which deflect downward, forcing the lower stem against the valve seat. 当手轮旋转到关闭位置,上阀杆推动横膈膜,横膈膜下垂,迫使下阀杆接触阀座。
- Monoecious.Leaves alternate on upper stems or opposite on lower stems. 雌雄同株在上面茎或对生在下部茎上的叶互生。
- The point of penetration through the diaphragms is sealed by E-beam welding. When the upper stem rides up and down on its threads it now moves the lower stem by a mechanical connection. 通过横膈膜的穿透点用电子束焊接来密封。当上阀杆沿着它的螺纹上下运动时,通过机械连接带着下阀杆一起运动。
- It has two stem sealing:one is stuffing box and another is toroidal sealing ring (O-ring). 本阀阀杆密封分为两种形式:一为填料密封;一为O型密封环密封。
- The upper stem is threaded into the diaphragm retainer nut. When the handwheel is rotated to the closed position the upper stem pushes on the diaphragms, which deflect downward, forcing the lower stem against the valve seat. 上阀杆通过丝口旋在横膈膜止动螺母里。当手轮旋转到关闭位置,上阀杆推动横膈膜,横膈膜下垂,迫使下阀杆接触阀座。