Circulation Heaters

Circulation Heaters

Circulation Heaters are used when a pressurized, circulating fluid needs to be heated. A flanged immersion, or a screw plug immersion heater is inserted into a into a pressure vessel. This vessel may also be called a pipe body. The fluid passing though this circulation heater will rise to the desired temperature. This heating approach greatly enhances normal immersion heaters by offering a method to give you heat on demand. Many temperature control options give you can get the exact temperature control of the heated fluid.

Circulation Heaters are often called electric fired heat exchangers, they generate there own heat, perform at 100% efficiency, and are adaptable to general purpose terminal enclosures, weather/moisture resistant terminal enclosure, or hazardous location and explosion proof locations.

The pressure vessel, also called a pipe body, is normally mild steel or stainless steel. When design specifications require ASME approved construction, ASB circulation heaters can be stamped with the applicable Code "U", "UM", "S" or "H" Stamp. An insulated metal jacket prevents unwanted heat loss. Multi stage units are pre- piped and mounted on a support frame. Final kilowatt output is unlimited.

Once the correct immersion heater is selected, the pipe body is designed to house the heater, connect to your piping system and heat your product.

Flanged Immersion Heaters for Circulation Heaters:
Immersion heaters come in a wide variety of configurations, styles, and shapes. Our goal is create a simple yet effective design to solve any fluid heating environment you have. By selecting the best sheath material, choosing the optimum fitting method and manufacturing the elements to any desired watt density, you can expect the optimum engineered heating solution for your requirements. Fast delivery gets you this perfect heater almost immediately.

Flanged immersion heaters normally have many individual heater elements, or blades, either welded or brazed into the flange. Elements arranged in multiples of 3 for balancing the load to your 3-phase power supply

Most Common Flanges:
• mild steel or a full range of 300 series stainless steel
• Other materials available
• 150# and 300# ANSI flange ratings are most common
• can offer you up to 2500# rating

Most Common Sheath Material:
• copper
• steel
• stainless steel
• Incoloy 800 & Incoloy 840
• Inconel 600
• Other sheath materials also offered

Most Common Terminal Enclosures
• General Purpose NEMA1
• Weather Resistant NEMA 4, NEMA 4X
• Hazardous Location NEMA 7

Most Common Sheath Materials, Application, and Watt Densities

Sheath Material	Application	Watt Density Watt.in2
copper	to heat potable water	40-72
steel	oil hydraulic oil	20-25 12-15
stainless steel	process water, mild acid, de-ionized water	20-60
Incoloy 800	water, mild alkaline solutions, air and gases maximum sheath temperature 1400ºF	10-125
Incoloy 600	water, very alkaline solutions, high temperature air and gases maximum sheath temperature 1500ºF	10-50

Most Common Built-in Control Options
• "K" calibrated thermocouple for high limit sheath protection
• "J" calibrated thermocouple for temperature control
• mechanical thermostats:

Power Ratings
• up to 240 volts, 25-amp single pole, single throw
• up to 240 volts, 25-amp double pole, single throw
• up to 600 volts, 15-amp triple pole, single throw

Temperature Ranges
• -16 to 40°C (0-100°F)
• 10 to120°C (50-250°F)
• 70 to 280°C (160-540°F)
• 160 to 370°C (320-700°F)

Screw Plug Immersion Heaters for Circulation Heaters:
Immersion heaters come in a wide variety of configurations, styles, and shapes. Our goal is create a simple yet effective design to solve any fluid-heating environment you have. By selecting the best sheath material, choosing the optimum fitting method and manufacturing the elements to any desired watt density you can expect the optimum engineered heating solution for your requirements. Fast delivery gets you this perfect heater almost immediately.

Screw plug immersion heaters can have from 1 to 4 elements, or blades, either welded or brazed into the screw plug. Screw plug heaters have lower pressure ratings than available with flanged immersion heaters. For high pressure application please go the the flanged immersion heater section.

Most Common Screw Plugs:
• Brass, mild steel or 316 series stainless steel
• Other materials available
• 1", 1 ¼", 1 ½", 2', and 2 ½" NPT are most common sizes
• Other sizes or metric and British thread sizes can be made

Most Common Sheath Material:
• copper
• steel
• stainless steel
• Incoloy 800 & Incoloy 840
• Inconel 600
• Other sheath materials are also offered

Most Common Terminal Enclosures
• General Purpose NEMA1
• Weather Resistant NEMA 4, NEMA 4X
• Hazardous Location NEMA 7

Most Common Sheath Materials, Application, and Watt Densities

Sheath Material	Application	Watt Density Watt.in2
copper	to heat potable water	40-72
steel	oil hydraulic oil	20-25 12-15
stainless steel	process water, mild acid, de-ionized water	20-60
Incoloy 800	water, mild alkaline solutions, air and gases maximum sheath temperature 1400ºF	10-125
Incoloy 600	water, very alkaline solutions, high temperature air and gases maximum sheath temperature 1500ºF	10-50

Most common built-in control Options - Thermostats

Mechanical Thermostats:
Power Ratings
• up to 240 volts, 25-amp single pole, single throw
• up to 240 volts, 25-amp double pole, single throw
• up to 600 volts, 15-amp triple pole, single throw

Temperature Ranges
• -16 to 40°C (0-100°F)
• 10 to120°C (50-250°F)
• 70 to 280°C (160-540°F)
• 160 to 370°C (320-700°F)

Other Available Features
• "K" calibrated thermocouple for high limit sheath protection
• J" calibrated thermocouple for temperature control