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Wessels is a manufacturer and marketer of pressure vessels for fluid control applications. Wessels was founded in 1908 and has emerged as a leading provider of ASME (American Society of Mechanical Engineers) and non-ASME pressure vessels to the heating, ventilating, and air conditioning (HVAC) market. Wessels' diverse product offering includes hydropneumatic tanks, expansion tanks, air separators, and other specialty and custom tanks.

To meet customer demand, Wessels offers its vessels in sizes ranging from 2 to 10,000 gallons. Most of Wessels' pressure vessels are designed using a pre-pressurized vessel with an internal bladder or diaphragm to manage fluids under pressure. The majority of Wessels products are standard catalogue models. Over 6000 tanks are carried in inventory for immediate shipment. Custom tanks are produced to customer specifications, for high pressures and/or special materials for severe duty applications.

Wessels' has developed a sterling reputation for delivering high quality products primarily for hot or chilled water HVAC systems. Wessels is recognized for delivering a wide breadth of high quality pressure vessels that are cost competitive and delivered on a timely basis.

The combination of its ability to offer high quality products and deliver outstanding customer service has allowed the Company to foster long-term relationships with many of its customers. Wessels products are manufactured in it's 110,000 sq./ft. facility in Greenwood, Indiana, a suburb of Indianapolis. Sales are made worldwide