The 60 Series valve is very reliable for general purpose uses and is also efficient in steam or other thermal uses. It has a working pressure of up to 3000 psi and works for a temperature range of -65 to 450 degrees Fahrenheit.
The coned-disc, spring-loaded seat design, along with the support ring, compensates for seat wear and pressure and temperature changes. The support ring contains the seat and protects against premature wear and deformation. The coned-disc spring provides a spring-load to the seat, creating a seat seal regardless of pressure changes. It also reduces seat wear from pressure surges.
The two-piece, live-loaded chevron packing design supports the axial load radially from the stem nut along the length of the chevron. This reduces the operating torque of the valve and compensates for stem wear, creating a tight seal of the stem and bonnet.
By comparison, conventional packing designs require higher force for the packing to work, so the axial load is transmitted with higher force and uneven distribution. It creates unnecessary wear on the stem, lowers the cycle life and requires higher actuation torque.
Under high pressure the ball in the 60 Series is forced downstream which flexes the downstream seat and creates a seal. The upstream seat also flexes with the ball movement and maintains a seal. As pressure forces the seat downstream, the seat spring compresses, which reduces the force on the ball. This reduces wear and lengthens the cycle life.
By comparison, in conventional valve seat design, pressure acts on the full area of the inlet seal when valve shut off occurs. The seats only support on the inside is the ball. Seat failure can occur because the segment of the seat exposed to the ball orifice is entirely unsupported on the inside. The lack of support allows pressure to deform the seat into the opening of the ball.