D-Series — D2 (7 SCFM) through D54 (2,000 SCFM) single-tower deliquescent dryers, covering small portable packages to large mining and marine installations. Charged with Dry-O-Lite, Van Air's proprietary hygroscopic salt tablet. The F200 coalescing after-filter ships with each dryer. Dry-O-Lite tablets are sold as a recurring 30-90 day consumable.
Coverage Single product family — the D-Series single-tower deliquescent line spans D2 (7 SCFM) through D54 (2,000 SCFM), one family covering small portable packages up to large mining/marine installations. No specialty variant — standard configuration only; deliquescent drying is inherently power-free and the same single-tower design serves remote, off-grid, portable, and hazardous-location use without a separate variant. (For Class 1 Div 1 desiccant-class drying Van Air offers the separate HLSXA explosion-proof line — a different product type.)
Van Air Systems has manufactured deliquescent dryers in Pennsylvania since 1944 and is the originator of Dry-O-Lite, the salt-tablet desiccant that became the industry reference for this technology. The D-Series spans the full deliquescent flow range in a single product family — D2 (7 SCFM) through D54 (2,000 SCFM) — so one brand covers a small job-site package and a large mine-air installation. Every unit ships with the mandatory F200 after-filter as a matched set, removing the guesswork of pairing a separate coalescing filter. The Dry-O-Lite consumable establishes a standing reorder relationship on every installed unit. Van Air also carries the HLSXA explosion-proof desiccant line, giving SPC a single source for both remote/off-grid and Class 1 Division 1 hazardous-location air.
Why Van Air Systems here Van Air Systems originated salt-tablet deliquescent drying and has built it in the USA since 1944 — the deepest track record in the category. The D-Series covers the entire deliquescent flow range from one product family, and every dryer arrives as a complete package with its matched F200 after-filter, so the installation is right the first time. Dry-O-Lite is the tablet the rest of the industry is measured against. For remote, portable, and very-wet-inlet jobs, Van Air is the specialist who knows this technology better than anyone.
HL / MHL
Coverage Heatless twin-tower regenerative across two size tiers: MHL compact line (MHL-3 through MHL-50) for small flows in a tight footprint, and HL line for 200-2,000 SCFM, both -40°F PDP standard (-100°F with molecular sieve fill), design pressure 60-150 PSIG. Hazardous-location variant offered as the HLSXA explosion-proof series, certified Class 1 Division 1 Groups C & D, 55-800 SCFM, 250 PSIG design pressure. No heated-purge or blower-purge variant in Van Air's regenerative line; no high-temperature variant offered.
HL heatless twin-tower regenerative desiccant dryers (200-2,000 SCFM, 60-150 PSIG design pressure) and the MHL compact heatless line (MHL-3 through MHL-50). -40°F PDP standard with activated alumina; -100°F achievable with molecular sieve fill. Van Air also offers the HLSXA explosion-proof regenerative desiccant dryer, certified for Class 1 Division 1 hazardous locations (Groups C & D), 55-800 SCFM.
Why Van Air Systems here Van Air's MHL line packs full heatless regenerative drying into a compact footprint — the right answer where panel space or skid real estate is tight. Van Air also uniquely brings explosion-proof (Class 1 Div 1) regenerative desiccant to the SPC line through the HLSXA series, opening hazardous-location accounts most competitors cannot quote.
HLSXA Series — explosion-proof regenerative (twin-tower) heatless desiccant dryers, certified for Class 1, Division 1, Groups C & D per the National Electric Code (NEMA 4/7). 55-800 SCFM at 100 PSIG; 250 PSIG design pressure; -40°F PDP.
Coverage HLSXA is itself the hazardous-location specialty variant of Van Air's heatless desiccant line — explosion-proof controls and enclosure certified Class 1 Division 1, Groups C & D (NEMA 4/7). Covers 55-800 SCFM at 100 PSIG, 250 PSIG design pressure, -40°F PDP. Catalog-standard product, not an engineered special. No high-pressure or high-temperature sub-variant offered; for natural-gas (vs compressed-air) service Van Air directs to the separate HLSXG line.
Van Air's HLSXA units carry hazardous-location certification on the electrical components and enclosure (Class 1 Division 1, Groups C & D, NEMA 4/7), so the dryer can be installed inside a classified area where standard equipment is excluded. They cover 55-800 SCFM at 100 PSIG with a 250 PSIG design pressure and reach desiccant-class drying down to roughly -40°F pressure dew point. Critically, the HLSXA is a standard catalog product rather than a one-off engineered special, which means a defined, fast lead time. Like any desiccant dryer it requires a coalescing pre-filter upstream — and in a classified area that pre-filter and the rest of the air train must carry matching hazardous-location ratings. For natural-gas service rather than compressed air, Van Air directs to the separate HLSXG line. Van Air has manufactured compressed-air drying equipment in the USA since 1944.
Why Van Air Systems here Van Air Systems is one of the few manufacturers that offers an explosion-proof desiccant dryer as a standard, catalog product — most of the industry treats hazardous-location units as long-lead engineered specials. That makes Van Air the brand that lets SPC quote a Class 1 Division 1 job with a real, fast lead time and a known specification. Backed by US manufacturing since 1944, it gives SPC genuine credibility with hazardous-location accounts in oil & gas, chemical, petrochemical, and mining.
