Sour Service Capability—Materials are available for applications involving sour service. These materials comply with the requirements of NACE MR0175-2002.
Excellent Flow Control—The eccentrically mounted disc design provides an approximately linear flow characteristic and can be used for on/off or throttling control applications through 90 degrees of disc rotation. Optional disc stop on Type 8510B provides seal protection.
Improved Environmental Capabilities—The optional ENVIRO-SEAL® packing systems, are designed with very smooth stem surfaces, and live loading provides improved sealing, guiding, and loading force transmission. The seal of the ENVIRO-SEAL system can control emissions to below the EPA (Environmental Protection Agency) limit of 100 ppm (parts per million) for valves.
Lost Motion Minimized—For Type 8510, the taper pin/disc connection and the splined valve shaft with clamped lever and single pivot linkage reduce lost motion between the actuator and valve. For Type 8510B, the taper key/disc connection and the splined valve shaft with clamped lever and single pivot linkage reduce lost motion between the actuator and valve.
Greater Capacities and Lower Operating Torques—The contoured disc increases flow capacity and reduces operating torque at peak angles of disc opening. 