Riggio officially became an authorized Velan Modification/Service Shop on March 25, 2020. The authorization was granted after an extensive on-site audit of Riggio’s valve rebuilding, modification, testing capabilities and history restoring Velan valves to like-new condition.
For critical service valves, the Riggio capability to rebuild delaminated/damaged hard-faced seats and plugs is a key component for Velan to grant high-level authorization. Innovative methodology and tooling includes a robotic TIG process for hard-facing restoration employing approved ASME welding procedures with respective qualifications for Inconel butter-layers. The layers are followed by Stellite #6 hard-facing overlay in preparation for final finish surface/seat grinding and lapping.
Velan is a world leader in the design and production of a wide range of cast and forged steel gate, globe, check, ball, triple-offset butterfly, knife gate, highly engineered severe service valves, and steam traps offering superior performance across all major industrial applications.