Process Water & Corrosive Solution Circulation Heaters
Durable Design
Long service life in hostile environments
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Support and spares available around the world
Process Water & Corrosive Solution Circulation Heaters
Water Heaters are ideal for heating municipal water for industrial washing and rinsing processes, as well as purified deionized and demineralized water. Sturdy 0.475" diameter copper and Incoloy® sheath elements provide superior strength and rigidity. Chromalox elements utilize high quality resistance wire for coil construction. All stock and assembly stock heaters come with mechanical AR thermostats. These thermostats are suitable for most applications. Explosion-resistant and liquid-tight thermostats are provided on E2 and E4 units, respectively. Other applications include indirect heating of viscous liquids and temperature maintenance of storage tanks.
NWHIS Deionized Water & Corrosive Solution Applications
NWHOIS Light/Medium Weight Oil & Corrosive Solution Applications
NWHOISR Light/Medium Weight Oil & Corrosive Solution Applications
Terminal Enclosures — Standard stock heater terminal enclosure E1 General Purpose. Moisture Resistant/Explosion Proof E2 or Moisture Resistant E4 Enclosures are available as assembly stock.
Elements — Sturdy 0.475" Dia. Stainless Steel or INCOLOY® sheath elements provide superior strength and rigidity. Chromalox elements utilize high quality resistance wire for coil construction. The coil is surrounded with high purity magnesium oxide which is compacted to a dense solid to ensure high thermal conductivity and dielectric strength.
Corrosion Resistance — NWHIS and NWHOIS pipe bodies and all Stainless Steel heating elements are passivated to provide additional resistance to corrosion.
Flanges — Type 304 Stainless Steel flanges are standard on 3" and larger circulation heaters. Flange dimensions conform to ANSI B16.5 standards.
Vessels — Pipe body and nozzles are type 304 ASTM A312 ERW Stainless Steel pipe. The end disks are type 304 ASTM A240 Stainless Steel plate. Provided with thermal insulation and painted sheet metal jacket.
Baffle Assemblies — Internal baffle assemblies are provided for model GCHISB-18 heaters to increase the velocity of the air, gas or steam as it passes through the vessel. Increasing the velocity of the gas helps reduce the temperature of the element sheaths and the vessel walls in critical applications.
Wiring — Wiring terminals are spaced to provide proper arcing and creepage clearances. Termination insulators provide electrical isolation between the terminals and the grounded metal sheath to enhance personnel safety and equipment service life. Heavy duty jumper straps and other terminal parts assure tight connections and an extra margin of current carrying capacity.
Controls — All stock and assembly stock heaters, Series MTSS, 03 and 06, come equipped with mechanical AR thermostats. These thermostats are suitable for most applications. Explosion-resistant and liquid- tight thermostats are provided on E2 and E4 units, respectively. Individual product pages list other types of thermostats and controls available for each heater. For heaters listed without controls, refer to the Overview on Mechanical and Electrical Control Options in this section.
Precision Temperature Control and Control Panels — For larger kW heaters and precise control of gas temperatures in high temperature applications, Chromalox recommends the use of thermocouple sensors, electronic PID temperature controls and SCR power panels for circulation heater applications. The use of electronic and SCR controls will minimize overshoot and reduce the possibility of heater damage from overtemperature operation. Integral or remote mounted control panels with electronic controls and solid state (SCR) or contactor power controllers can be provided using virtually any combination of control devices. Consult the Controls section for details.
CVCHS Corrosive Solutions
Terminal Enclosure — E1 General Purpose is standard.
Elements — INCOLOY® sheath elements rated 75 W/In2.
Flange — Stainless steel flange for corrosion resistance.
Vessel — CPVC pipe body material is resistant to many corrosive solutions and is ideal for water applications. Pipe body material provides good thermal insulation, reducing heat loss.
Thermostat — Integral thermostat with 60 to 200°F temperature range, located inside the terminal enclosure.
High Limit Control — Integral automatic cutout (over-temperature control) protects against fluid or element overheat (set to open at 195°F).
Vibration Resistant — Vibration resistant construction to withstand vibrations typically experienced on many types of operating equipment (i.e., engines).
Easy to Install — Minimal size and light weight, no supporting brackets are required.
Technical Resources
Circulation Heater Design Guide
Circulation Heater Specification Data Sheet
NWHIS Deionized Water & Corrosive Solution Applications
NWHOIS Light/Medium Weight Oil & Corrosive Solution Applications
NWHOISR Light/Medium Weight Oil & Corrosive Solution Applications
NWHIS, NWHOIS & GCHIS Series Catalog Page
CVCHS Corrosive Solutions
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From high temperature gas heating to superheated steam and super-critical water processing, Chromalox is the leading partner for all process heating solutions.
