Bolt cover, plug 90 degree around, its sealing is realized by the sealing face acround the sleeve, it have unique 360 degree metal degree edge for protection and fixing of the sleeve, there is no cavity in the valve for accumulation of medium, Metal edge provides the function of self-cleaning when the plug rotated, applicable to the operation condition that is glutinous and apt to smudge. Double direction
Standard compliance:
Design and manufacture: API6D, API599
Face to face: ANSI B16.10
Flange connection: ANSI B16.5
Test and inspection: API 598, API6D