||The valve seat is inlaid with engineering plastics plug-in by metal base, and is finished after assembling to form a sealing pair with the sphere. The plug-in is made of thermoplastic plastics and is pressed into the base by a hydraulic press to achieve tight fit.
||Tengbo base groove has a unique pre-tightening and anti-stripping design, so that the plug-in is locked in the groove, not blown out. By eliminating internal and external rolling and plate locking, not only the processing technology is reduced, but also the damage of coating is avoided, so that the valve seat is not only stable but also beautiful in appearance.
||This structure is recommended for medium and low pressure operation. Tengbo recommended size is DN50-DN600, pressure grade PN16-PN40, Class150-Class300.