Stainless Steel Tanks
The rapid growth of data centers is increasing the demand for stainless steel hydronic equipment that can handle continuous operation and challenging water conditions. As systems become larger and more critical, operators are prioritizing materials that offer superior corrosion resistance, durability, and long-term reliability. Stainless steel tanks and components, often designated as SS- Series, are well suited for these environments where performance and system protection are essential.
Wessels Company supports this need with a range of stainless steel products designed for high-performance applications. SS-WVA and High Velocity (HV) air and dirt separators remove entrained air and particulate that can cause noise, reduce efficiency, and damage system components. Stainless steel air purgers and separators use internal flow patterns to efficiently eliminate air, helping maintain quiet and stable operation while protecting equipment from corrosion. These solutions are especially valuable in systems using glycol or treated water where material integrity is critical.
Maintaining water quality is also a key concern in data center cooling systems. WesFlo bag and cartridge filtration vessels provide high-efficiency particulate removal to keep systems clean and operating at peak performance. Together with stainless steel expansion tanks, storage, buffer, and separation equipment, these products help ensure reliable operation, reduced maintenance, and long service life in the most demanding commercial and industrial applications.
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Air Elimination Equipment
Stainless Steel AP Air Purgers
The SS-AP Stainless Steel Series air purgers:

- ASME certified
- 304 stainless steel (316L stainless steel available)
- Rated to 450°F and 150 PSI
- Heavy-duty fixed Butyl diaphragm

Stainless Steel Air & Dirt Separator Series
The SS-WVA Stainless Steel series:
- 304 stainless steel construction
- 316L stainless steel available
- Removable cartridge style air and dirt separation media
- Built in accordance with ASME code
- Rated to 250°F and 150 PSI
- SS-WVA-HV high velocity models available for higher flow applications

SS-WVA:
SS-WVAN Non-Removable:

SS-WVAN-HV Non-Removable High Velocity:

Tangential / Vortex Air Separator
The Stainless Steel SPA Series:
- 304 stainless steel (316L stainless steel available)
- Offered in sizes from 56 to 17000 GPM
- Rated to 450°F and 125 PSIG
Tangential / Vortex Air Separator with Strainer
The Stainless Steel SPA Series:
- 304 stainless steel (316L stainless steel available)
- Offered in sizes from 56 to 17000 GPM
- Rated to 450°F and 125 PSIG
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Expansion Compression Tanks
Stainless Steel NA Series
SS-NA Series Stainless Steel vessels:
- Fabricated from 304 stainless steel
- Sizes range from 15 to 400 gallons.
- 316L stainless steel available
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Expansion Bladder Tanks
Stainless Steel FXA Series
SS-FXA Series Stainless Steel vessels are:
- 304 stainless steel (316L stainless steel available)
- Heavy-duty replaceable butyl bladder
- Sizes range from 10 to 792 gallons
- Factory pre-charged to 30 PSI and field adjustable and can be installed in the horizontal position with the system connection located below the tank horizontal center line
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Stainless Steel WesFlo Filtration
Stainless Steel Filter Vessels
Wessels Company WesFlo stainless steel filtration vessels help protect data center cooling loops and heat transfer equipment by removing particulate from mission-critical hydronic systems.
- Built in accordance with the ASME boiler and pressure vessel code
- Available in 304 or 316L stainless steel
- BF bag filter vessels accept standard #1 and #2 bag filters
- BF Series maximum flow up to 1,440 GPM
- GB multi-round bag filter housings available for flows up to 4,200 GPM
- CF cartridge filter vessels available for fine particulate filtration with flows up to 2,040 GPM
- Maximum design temperature up to 500°F, depending on model
