The Signature Fugitive Emission Valve incorporates the latest break-through technology from Severe Service Technology, Inc. The patented, Triple Redundant Sealing Stem design was developed for use in lethal gas applications where safety and performance are critical. The elongated packing box eliminates the possibility of leakage. SSS Signature Fugitive Emission Valves range from 0.50 inches to 24 inches and can be built to a wide array of materials for bodies and trim. Optional features include bi-directional flow, dual solids excluders, coatings and shut-off classes up to Class VI (bubble tight).