產品特點：
閥芯均為不銹鋼材料、活塞式結構，活塞環用特殊耐溫、耐磨材料制作；活塞與金屬閥腔不產生直接摩擦，閥體

Applications:
It is widely used in aerospace, shipbuilding Heavy Industry, chemical industry, boiler, heating equipment, drying equipment, food and medical equipment, cleaning equipment, such as heating pipe system.

Features: 
Are all stainless steel valve, piston structure, piston ring with a special temperature, wear-resistant material; piston valve chamber with the metal does not have a direct friction, the valve mounting direction unlimited; special coil, not easy to burn; a long time to stop action Restart the action as sensitive

安裝方向無限制；特制線圈，不易燒毀；長時間停止動作重新啟動，動作同樣靈敏。

主要技術參數：

Main technical parameters:

工作原理：
常閉：當線圈通電時，先導閥芯吸合，先導孔打開，閥上腔卸壓，活塞靠下腔介質壓力推動，電磁閥打開；當線圈斷電時，先導閥芯靠彈簧復位，先導孔關閉，閥上腔由活塞節流孔增壓和復位彈簧的推力，電磁閥關閉。
常開：當線圈通電時，先導孔關閉，閥上腔由活塞節流孔增壓和復位彈簧的推力，電磁閥關閉。當線圈斷電時，先導閥芯靠彈簧復位，先導孔打開，閥上腔卸壓，活塞靠下腔介質壓力推動，電磁閥打開。

How it works:
NC: When the coil is energized, the pilot spool pull the pilot hole to open, pressure relief valve on the chamber, the piston on the lower chamber medium pressure to promote, the electromagnetic valve is opened; When the coil power, the pilot valve by the spring return, pilot hole closed, the valve chamber and pressurized by the piston return spring throttle thrust, the electromagnetic valve is closed.
Normally Open: When the coil is energized, the pilot hole closed, the valve chamber and pressurized by the piston return spring throttle thrust, the electromagnetic valve is closed. When the coil power, the pilot valve by the spring return, pilot hole open, pressure relief valve on the chamber, medium pressure piston push the lower chamber, the electromagnetic valve is opened.