產品特點Features：
頂裝手輪，當自動控制失效時可以手動控制。Manual override for easy operation in the event of air supply failure
采用活塞式執行器，推力大，性能穩定。Piston actuator provides stable and high thrust.
采用楔式石墨環加蝶形彈簧的填料組合，對填料的預緊提供動態補償，避免填料失效。High quality graphite packing with Belleville spring provides a continuous and stable sealing force.
自密封閥蓋設計，壓力增大密封力同時增強，確保閥蓋處密封無泄漏。The pressure seal bonnet design ensures that there is no external leakage as the sealing force increases with increasing system pressure.
多孔式閥籠具有減緩流速作用，并能避免介質直接沖刷閥座密封，使汽蝕閃蒸發生在閥籠的中心，避免對密封面的直接破壞。Multi hole cage provides velocity control and reduces the effects of flashing across the valve seat.
