Victaulic® Series 608N butterfly valves are designed for pressures ranging from full vacuum to 300 psi/2065 kPa and for bi-directional, dead end services to full working pressure. This grooved end valve is joined to a copper tube system by utilizing Style 607 couplings. The valve features a patented seat design that creates full 360 deg sealing. The pressure-enhanced seat compresses to form a larger sealing area as the pressure increases. The seat design also contributes to low breakaway torque.