Tel: +1 908 500 7500 Stephen R. Parker, Sales Engineer
Ringoes, New Jersey
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SVE Catalytic Oxidizers

Soil Vapor Extractors

Hitemp Technology Corp (HTT) offers the world's first Catalytic Soil Vapor Extractor (SVE) System with the capability to operate as either an Electric or as a Gas Fired System featuring a basic core shell that can be setup with a catalyst module for 98% destruction efficiency and an integral Preheat Exchanger. The module incorporates a flange allowing an electric heating element or a gas burner to be mounted. Each heating system comes with a Nema-4 WP Panel and all necessary components for operation.

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300 SCFM Electric Systems
with Optional blower and Flame Arrester

What makes the HiTemp system unique is a design that uses the basic core shell, heat exchanger and catalyst modules for both Electric and Gas fired units. An electric unit can easily be changed over to a gas fired unit, or vice versa, in about 2 hours. The value for our customers is the ability to purchase a single system that can be used for both Electric and Gas applications.

The Electric system comes with Honeywell temp controls, SSR and shutoffs. Starters can be included for an integral blower or external controls upon request. The gas-fired system comes with a Nema-4 WP panel with temp controls; UL and FM combustion components including a Honeywell flame safety and valve train.

The system is designed with a vertical configuration to minimize the footprint and is mounted on a skid for ease of shipping and handling and the mounting of any optional components. The system is bolted together so no parts are hidden allowing easy access for inspection and repair of all heat exchanger welds and for easy cleaning or replacement of the burner and electric heating elements. A site-assembled scaffold with a chain fall is used to access the catalyst module.

Typical HTT Electric Catalytic Oxidizer System

HTT Fume Incineration System containing a gas burner, or electric heaters, to raise the temperature of the exhaust gases to the required operating temperature. This assures maximum destruction of the VOCs in the exhaust gas. The complete system is packaged with an integral preheat exchanger, Inconel-sheath, low watt density heating elements or gas burner, precious metal ceramic type catalyst module, refractory lined processing chamber and a field-installed stack.

Catalytic Oxidizer System Chamber

The Catox System is constructed of 304 stainless steel (Note: We use 316 L for HCl solvent applications) and insulated with a combination of Ceramic Fiber and high temperature insulating materials. The refractory is installed with stainless steel anchors to maintain integrity while the lower chamber is constructed of carbon steel and coated with an acid-resistant epoxy coating.

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300 SCFM Electric System

Catalyst Bed

Catalyst is supplied in modular sections in separate frames. The frames come complete with all mounting flanges and gaskets. The frames bolt directly to a stainless steel support grid inside the chamber of the retention zone. This allows the EZ-Bolt Catalyst modules to be easily accessed for removal and or maintenance.

Preheat Exchanger

The catalytic oxidizer system includes an integral preheat exchanger for raising the temperature of the exhaust gases prior to entering the firing chamber. The exchanger is a shell and tube-type unit manufactured using easy-clean 1 inch alloy tubes.

Electric Heating System (E Option)

Our catalytic oxidizer system includes a process air electric heater for raising the temperature of the gases to operating temperature as required. System comes complete with an Incalloy-sheathed, tubular heater rated at 10 to 20 watts per square inch and mounted on a stainless steel flange with a weather-proof terminal housing and screw type terminals.

Natural Gas Burner (G Option)

The system is available with a packaged gas-fired burner, for raising the temperature of the gases to operating temperature as required. System includes flame safety, controls and safeties along with a motorized modulating gas valve that regulates burner output using digital controllers. Burner train components are supplied separately for field installation. Customer is to supply gas regulators as needed.

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150 SCFM Catox Shell
with EZ-Bolt on Type Catalyst Module

Heating System Conversion

The top of the system contains a flanged connection for mounting either the electric or gas heating system. Choose the desired heat source and bolt either the burner or the electric elements to the flange. Each heat source comes complete with its own panel, which is mounted to the system base. Simply connect the thermocouples to the panel and the system is complete. Removal and reinstallation takes less than one hour, however, it's sometimes more cost effective to replace a troublesome component or panel with a new one than to spend time field-troubleshooting.

ID Blower (IDB Option)

The system includes one (1) dilution air blower for maintaining minimal air ratio and controlling chamber temperature. The blower includes a control damper and modulating actuator.

Spark Arrester (SA Option)

Included with the system is one (1) flame and spark arrester to reduce the possibility that gases and flame may flow back up the supply duct.

Data Logging (DL Option)

System package may include an optional Data Logging system manufactured by HOBO such as model H12-002 for a single channel type K TC. Other recorders are available that can accept T/C, MA, or DC inputs for required sensors.

Dillution Air Control T-valve (T Option)

The system includes one (1) waste gas diverting t-valve for closing off the stack during operation, or for closing off the waste gas to the oxidizer when the system is not operational. System package includes a spring-return actuator that diverts gases up the stack during a power failure.

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Tube-type Preheat Exchanger

Control Operation

The system operator has the ability to start and stop the system from the main panel, or from remote inputs. Start-up proves the blower, start burner, proves set temperature and signal to start fume injection. Blower pressure and customer safety limits must also be proven prior to burner ignition. Component failures can shut down the system and alert the operator. Indicator lights display any fault(s).

The system is designed to operate with variable waste-gas input while natural gas is controlled to maintain a preset temperature. The system self-regulates the fuel input to both maintain temperature and adjust conditions to match the flow of the waste gas stream.


The system package includes one (1) Hoffman Nema-4 control panel for remote control and monitoring. The system maintains a preset temperature utilizing a type K T/C and 4-20 ma digital controllers. System operation is monitored by Honeywell DC-3000 temperature controllers located in the main panel. All controls and safeties are also operated from the main panel. The controller modulates the heat input to maintain temperature. Contacts are provided for remote start and stop as well as a pressure-limit switch for the motor starter coil. PLC operation is optional.

Soil Vapor Extraction Catalytic System Design Data

System Flow Rate - 100 200 300 500 1000 1500 SCFM
Waste Gas Temp - 100 100 100 100 100 100 oF
Preheat Temperature - 415 415 415 415 415 415 oF
Catalyst Inlet Temperature - 550 550 550 550 550 550 oF
Temperature Rise From Elec - 135 135 135 135 135 135 oF
Temperature Rise From VOC - 200 200 200 200 200 200 oF at 8% LEL
Catalyst Outlet Temperature - 700 700 700 700 700 700 oF
Estimated Stack Temperature - 250 250 250 250 250 250 oF
Calculated Heat Input - 7.5 15 24 37.5 75 112 Kw at 0% LEL
- 4 8 16 20 40 60 Kw at 3% LEL
- 0 0 0 0 0 0 Kw at 6% LEL
Heating Element Rating - 12 24 36 60 120 180 Kw
Destruction Efficiency - 99 99 99 99 99 99 %
Pre-heat Efficiency - 70 70 70 70 70 70 %
Catalyst Volume - 0.5 0.5 1.0 1.5 2.0 3.0 Cubic Feet (ft3)


Typically takes 6 to 8 weeks following receipt of a valid purchase order, progress payments and all required approvals.

Click here for more information on typical HTT Systems and Terms of Sale.


Installation may require utilities be brought to the system from source prior to installation. If possible, the gas train, supply duct and main panel are best located indoors. Any additional components that may be required to complete the system installation are provided separately prior to shipment of the main system units and may require prior installation at the system site.

Select desired system from the list below for more information

Thermal Oxidizers(SVE)
100 - 4,000 SCFM
Enclosed Flares
5,000 - 20,000 SCFM
Catalytic Oxidizers
1,000 - 5,000 SCFM
Catox with Preheat
1,000 - 25,000 SCFM
Electric Catox with Preheat
100-1,000 SCFM