3902026 05.14 Product Information

Economizer VHX 1-30 DescriptionThe VHX, Vortex Heat Exchanger is a unique and highly efficient economizer with a built-in bypass. It is extremely compact compared to traditional economizers as it utilizes a radiator style heat exchanger. The design creates a turbulent flow across the heat exchanger surface, thus maximizing heat transfer. When combined with a mechanical draft fan (TDF, IPVB or RSV), a single economizer can serve multiple boilers no matter whether they are of atmospheric, fan-assisted or forced draft design. The heat exchanger is mounted on an internal rail system that allows it to slide in and out for service or cleaning. The all 316L stainless steel construction allows it to be used for both condensing and non-condensing applications.A dual-damper design provides by-pass capabilities for use with dual fuel applications, and also prevents over-heating of the heat exchanger.When combined with a mechanical draft system, it becomes an EcoFlex system, which can be used to properly draft multiple boilers and allows to use a single economizer with multiple boilers.

ApplicationsThe VHX can serve a number of purposes:• Lower stack temperature• Preheat boiler feed water• Process water heating• Sanitary water heating• Increase boiler efficiency by at least 3-5%• Reduce fuel consumption• Reduce emissionsAnd can be used for a variety of applications:• Single or multiple boilers• Forced draft or atmospheric boilers• Condensing or non-condensing boilers• Baking Ovens• Process Applications• Chillers• Thermal oxidizers• Engine and turbine exhaust systems• Other high-temperature exhaust applications

MaterialHousing and heat exchanger tubes and fins is made in 316L (1.4404) stainless steel. The fins have a thin copper coating.

CapacitiesAvailable for steam boiler systems up to 1000 HP (33,000 MBH) or for other applications with flow rates up to 25,000 CFM. For optimal performance the economizer can be combined with a mechanical draft fan controlled by a modulating draft controller (EBC 30/31/35).

ConnectionsTapered (optional) or straight with proprietary bolt flanges. An exhaust fan can be attached to the mating bolt flange.

Warranty• Two-year factory warranty • 10-year warranty against corrosion perforation• Manufactured at ISO9001 certified plant

3902026 05.14 Product Information

ENERVEX Inc.1685 Bluegrass Lakes Pkwy.Alpharetta, GA 30004

P: 770.587.3238F: 770.587.4731T: 800.255.2923info@enervex.comwww.enervex.com

Fast acting damper actuator controls the by-pass damper position.

Specifications (Subject to Change without Notice)

Model VHX 1 VHX 2.5 VHX 5 VHX 8 VHX 14 VHX 20 VHX 25 VHX 30Boiler Input, Max. 1) MBH 1,000 2,500 5,000 8,000 14,000 20,000 25,000 30,000Air flow, Max 2) SCFM 400 1,000 2,000 3,200 5,600 8,000 10,000 12,000Housing Material ASTM 316LHeat Exchanger Material ASTM 316L / 1.4404 ASTM 316LHeat Exchanger Surface Ft2 45 52 104 473 834 1,224 1,483 2,343Operating Pressure, Max PSI 230 230 230 302 302 302 302 302Water Connection NPT 1.00 1.25 1.25 1.25 1.25 1.25 1.25 2.00Weight (Dry) lbs 73 92 128 232 367 512 616 724

kg 33 42 58 105 166 232 279 328Dimensions Length in 23.06 28.06 38.96 39.81 51.06 63.56 66.06 54.00

mm 586 713 990 1011 1297 1614 1678 1372ID in 10.00 20.00 20.00 24.00 28.00 30.00 36.00 42.00

mm 254 508 508 610 711 762 914 1067OD incl flange in 13.00 23.00 23.00 27.00 31.00 33.00 39.00 45.00

mm 330 584 584 686 787 838 991 1143No. of flange bolt holes 8 8 8 8 8 8 8 8

1) Based on 80% efficient boiler. Actual maximum may be higher.2) Based on 0.75 inch WC pressure drop. Actual maximum may be higher if a mechanical draft fan is used.

Accessories:• Circulating Pump • Relief Valve• Flow Control Valve • Pump Controller• Check Valve • Thermometers

The compact, radiator style heat exchanger showing the cross flow stainless steel fins with the copper coating.

Water connections on the side of the housing. The eight bolts can be removed, which allows for the heat exchanger to slide out for service.

The by-pass damper in the neutral position which allows free flow through the housing and the heat exchanger.