Innovative NEW EDGE ESS4 Series Heavy Duty Regulators Offer Safety and Advanced Design Victor has been the leader in gas equipment for close to a century, and its tradition of unparalleled safety remains a cornerstone of the brand today. With the Victor Professional EDGE ESS4 Series Regulators, Victor continues to offer the safest, most reliable and highest quality gas control technology, giving you more value for your purchase. In addition, standardized designs and components throughout the EDGE ESS4 regulators greatly simplify regulator service and repair.