Sigma Engineering LLC
Sigma Engineering LLC is your source for quality HVAC/R parts and supplies. We are the proud supplier for Standard Refrigeration replacement parts for legacy and newly built products.
Discover WHY Sigma is the Right Choice
Sigma Engineering exists due to their overwhelming service. Yes they have incredible inventory, outstanding quality and yes they have great pricing, but it’s more than that. Every Wholesale counterperson knows what it’s like to have a customer standing in front of them with a valve and they need to know what is is….RIGHT NOW!! At Sigma, they actually answer their phones and attend to your technical needs……..RIGHT NOW!!!!
Exclusively sold thru over 2,500 Refrigeration Wholesalers, Sigma enjoys the status of reputation and loyalty with every customer that comes in contact with them.
It’s all about the service!!
OEM Replacement Parts & Other Products
Sigma Engineering is the exclusive supplier for Standard Refrigeration Replacement parts for new and legacy Chiller Barrels and Water Cooled Condenser Barrels. This includes all Gaskets, Valves, Endplates, Zinc Anodes and more. Standard Refrigeration is still producing quality Shell and Tube Heat Exchangers and can still be contacted directly for complete units for new and replacement applications.