U41SM, U41H, U41Y type plunger series of products is the valve flap and seat according to the plunger principle design, rely on the plunger and the ring to achieve sealing, sealing is good, can be used for high and low temperature media can be used, widely used in steam pipelines and other requirements of sealing high conditions.

The sealing vice of U41SM soft sealing structure plunger valve is composed of upper and lower two soft sealing rings and the plunger. When the plunger is inserted into the inner hole of the sealing ring, the sealing ring around the plunger is pressed firmly by the load exerted by the nut of the bonnet on the bonnet, so as to ensure the sealing, and the sealing ring material restores to the original state under the elasticity when the valve is opened and withdrawn from the plunger. The plunger is connected to the valve stem after precision grinding and polishing. The sealing ring is made of new non-toxic non-metallic material, which has the functions of pressure resistance, wear resistance and self-lubrication, good sealing performance and long service life.

The sealing vice of U41H and U41Y hard seal structure piston valves is composed of precision ground and polished piston and hard seat surface after surfacing. The plunger is roughly machined and then carburized, high-frequency quenching and nitriding and other chemical treatments, and the hardness can be as high as HRC58-64. The sealing ring on the plunger valve is made of a new type of non-toxic non-metallic material, which is pressure-resistant, abrasion-resistant and self-lubricating, and the sealing is reliable and durable.