KingWay series electric operated ball valves have been designed with advanced structure of Japan and United States etc, It is machined in accordance with GB，JIS and API standards. The electric rotary actuator assembled by KingWay Company are all from Dynamic Corp. Ltd. The important part----Forged stainless steel ball or Structure ceramics ball have been machined in accordance with equipment and techniques of advanced whet, The ball is very round and highly precision ; The surface airproof of valves have been machined numerical control lathe, Products have high quality and good function. In addition，KW series ball valves have the following construction and features: The body is made from precision casting and has very nice show. The body has mount flat root which can install facilely the pneumatic, pneumatic---spring return, electric equipment etc. Lever which permits neither wrong visual determination of Open-Close position nor improper installation. Blow-out proof stem: When the pressure running through the valve in the body cavity has risen, the stem may blow out .To prevent such danger from taking place, the valve is provided with a stem flange in the lower part of the stem and so constructed that the stem may not blow out upwards. Even if the packing has burnt out in a fire or for any other reason, the internal pressure will bring the stem flange into close contact with the back seat of the valve body. Thus the fluid may be positively prevented from leaking through the packing so burnt out. If the pressure in the body cavity should abnormally rise or a gland bolt should be loose or missing anyway, an ordinary stem held with packing will blow out and the fluid will burst out. Besides, there are possibilities that such accident may take place upon maintenance. If the gland packing has burnt out in a fire, in particular, the back seat at the stem flange will be a requirement essential to the fire safety of the valve. Effective seat seal: Our seat is a new seat born out of long yeas?experience of KingWay. This seat is featured by its high capability of sealing against either high or low pressure as well as vacuum. Fire-Safe: With the valve heated in a fire, such non-metal parts as seat, gland packing, gasket or the like, may burnt out. Then，an excessive leakage will result so that the fire will gain headway. To prevent such situation from arising, the KW type ball valve is provided with a fire-sate mechanism. Once the seat has burnt out, the ball comes in close contact directly with the metal seat located on a pare of the body. Thus, the KW ball valve maintains its sealing property.