Hard facings on the plug and body seats are not required due to the unique, non-contact turning motion of the Wedgeplug and can be furnished to customer request.

• 由于楔塞独特的、无润滑旋转运动，使得阀塞和阀体阀座并不需要坚硬的表面，但是也可以根据用户的要求配置坚硬的表面。