cast inline CIRCULATION HEATERS

All circulation heaters from STS feature isolated flow-paths. Several models are ideal for heating flammable media or are appropriate for applications where purity must be maintained.

Cast Inline Circulation Heaters Summary Sheet

CAST-X Circulation Heaters

Offered in 6 sizes to 60 kW, CAST-X Heaters feature 316 SST flow-tubes with multiple enclosures & options.

casT-X HIGH TEMPERATURE CIRCULATION HEATERS

With a temperature range to 1112°F (600°C), our CAST-X High Temp Circ. Heaters feature bronze bodies.

PUR-X CIRCULATION HEATERS

Perfect for heating caustic solvents or semi gases, PUR-X Heaters feature replaceable PFA flow-tubes.

SPECIALTY CIRCULATION HEATERS

The Universal Solvent Heater and PUR-Therm Gas Delivery Heater meet specialized semi applications.

Circulation heater with Stainless Steel Tubes

CAST-X 500 Circulation Heaters

Power Range: 300 – 1500 Watts	Max Pressure: 5100 psi (351 bar)
Flow-Tube: OD: .250” (1/4″) (6.3 mm) Wall: .035” (.89 mm) Seamless Stainless Steel (316L grade)	Enclosures and Max Temps.: No Enclosure392°F (200°C) NEMA 1 (general purpose)250°F (121°C) NEMA 4 (water resistant)250°F (121°C) NEMA 7 (explosion proof)392°F (200°C)
No. of Tubes: 1 Tube	Download Cast-X 500 Brochure
	Download STEP Cast-X 500 Drawing

CAST-X 1000 Circulation Heaters

Power Range: 750-3000 Watts	Max Pressure: 2100 psi (144 bar)
Flow-Tube: OD: .313” (5/16″) (7.9 mm) Wall: .020” (1.7 mm) Seamless Stainless Steel (316L grade)	Enclosures and Max Temps.: No Enclosure662°F (350°C) NEMA 1 (water resistant)608°F (320°C) NEMA 1 with thermostat250°F (121°C) NEMA 4 (water resistant)777°F (555°C) NEMA 4 with thermostat250°F (121°C)
No. of Tubes: 1 Tube	Download Cast-X 1000 Brochure

CAST-X 2000 Circulation Heaters

Power Range: 1 – 5 kW	Max Pressure: 5100 psi (351 bar)
Flow-Tube: OD: .50” (1/2″) (12.7 mm) Wall: .065” (1.7 mm) Seamless Stainless Steel (316L grade)	Enclosures and Max Temps.: NEMA 1 (general purpose)482°F (250°C) NEMA 1 with standoff662°F (350°C) NEMA 1 with thermostat250°F (121°C) NEMA 4 (water resistant)350°F (175°C) NEMA 4 with standoff662°F (350°C) NEMA 7 (explosion proof)482°F (250°C)
No. of Tubes: 1 Tube	Download Cast-X 2000 Brochure

CAST-X 2500 Circulation Heaters

Power Range: 2.4 – 15 kW	Max Pressure: 4000 psi (275 bar)
Flow-Tube: OD: .625” (5/8″) (15.9 mm) Wall: .065” (1.7 mm) Seamless Stainless Steel (316L grade)	Enclosures and Max Temps.: NEMA 1 (general purpose) 662°F (350°C) NEMA 4 (water resistant)572°F (300°C) NEMA 7 (explosion proof)482°F (250°C) ATEX (explosion proof)482°F (250°
No. of Tubes: 2 Standard, 1 as Custom	Download Cast-X 2500 Brochure

CAST-X 3000 Circulation Heaters

Power Range: 2.6 – 27 kW	Max Pressure: 3300 psi (228 bar)
Flow-Tube: OD: .750” (3/4″) (19.1 mm) Wall: .065” (1.7 mm) Seamless Stainless Steel (316L grade)	Enclosures and Max Temps.: NEMA 4 (water resistant)572°F (300°C) NEMA 7 / ATEX (explosion proof)482°F (250°C)
No. of Tubes: 2 Standard, 1 as Custom	Download Cast-X 3000 Brochure

Circulation Heaters for Natural Gas Heating

CAST-X 4000 Circulation Heaters

Power Range: 2.6 – 27 kW	Max Pressure: 3100 psi (214 bar)
Flow-Tube: OD: .750” (3/4″) (19.1 mm) Wall: .065” (1.7 mm) Seamless Stainless Steel (316L grade)	Enclosures and Max Temps.: NEMA 4 (water resistant)572°F (300°C) NEMA 7 / ATEX (explosion proof)482°F (250°C)
No. of Tubes: 2 Standard, 1 as Custom	Download Cast-X 4000 Brochure

CAST-X High Temperature Circulation Heaters

CAST-X 500 High Temperature Circulation Heaters

Power Range: 565 – 1500 Watts	Max Pressure: 10700 psi (737 bar)
Flow-Tube: OD: .250” (1/4″) (6.3 mm) Wall: .035” (.89 mm) Seamless Stainless Steel (316L grade)	Enclosures and Max Temps.: No Enclosure 1112°F (600°C) NEMA 7 (explosion proof)1112°F (600°C)
No. of Tubes: 1 Tube	Download High Temperature Brochure

CAST-X 2000 High Temperature Circulation Heaters

Power Range: 1.2 – 6 kW	Max Pressure: 6800 psi (468 bar)
Flow-Tube: OD: .50” (1/2″) (12.7 mm) Wall: .065” (.89 mm) Seamless Stainless Steel (316L grade)	Enclosures and Max Temps.: NEMA 4 (water resistant)1112°F (600°C) NEMA 7 (explosion proof)1112°F (600°C)
No. of Tubes: 1 Tube	Download High Temp Brochure

pur-x Circulation Heaters

PUR-X 1000 Circulation Heaters

Power Range: 1.5 – 4.6 kW	Max Pressure: 70 psi (5 bar)
Flow-Tube: OD: .375” (3/8″) (9.52 mm) Wall: .031” (.80 mm) PFA (PerFluoroAlkoxy)	Enclosures and Max Temps.: NEMA 7 (explosion proof)392°F (200°C)
No. of Tubes: 1 Tube	Download Pur-X 1000 Brochure

PUR-X 2000 Circulation Heaters

Power Range: 5 – 7.9 kW	Max Pressure: 70 psi (5 bar)
Flow-Tube: OD: .375” (3/8″) (9.52 mm) Wall: .031” (.80 mm) PFA (PerFluoroAlkoxy)	Enclosures and Max Temps.: NEMA 7 (explosion proof)392°F (200°C)
No. of Tubes: 1 Tube	Download Pur-X 2000 Brochure

Universal Solvent Heater

universal solvent heater

Power Range:
6 – 8 kW

Max Pressure:
Solvent Tube: 3300 psi (228 bar)
Cooling Tube: 5100 psi (351 bar)

Flow-Tube:
OD: .750” (3/4″) (19.1 mm) Wall: .065” (1.7 mm) (Seamless 316 SST)

Cooling-Tube:
OD: .250” (1/4″) (6.3 mm) Wall: .035” (0.9 mm) (Seamless 316 SST)

Enclosures and Max Temps.:
NEMA 7 (explosion proof)392°F (200°C)

No. of Tubes:
1 Flowtube, 1 Cooling Tube

Download Universal Solvent Brochure

pur-therm gas delivery heaters

PUR-Therm Gas Delivery Heaters

Power Range: 400 – 1500 Watts	Max Pressure: 5100 psi (351 bar)
Flow-Tube: OD: .250” (1/4″) (6.3 mm) Wall: .035” (.89 mm) High-Purity Electropolished Seamless Stainless Steel (316L grade)	Enclosures and Max Temps.: Standard Max: 392°F (200°C)
No. of Tubes: 1 Tube with VCR Fittings	Download Pur-Therm Brochure

GET A QUOTE

Calculators

Power Flow Rate Temp Calculator

Calculate the electrical power, flow rate or temperature requirement.

airflow in standard cubic feet per minute

SCFM

temperature rise in degrees F from the inlet to the exhaust

ΔT

Watts = SCFM x ΔT/2.5

Watts

Temperature Conversion Calculator

Calculate the electrical power, flow rate or temperature requirement.

°F = ((( °C * 9) / 5 ) + 32)

°F

°C = ((( °F - 32) * 5 ) / 9)

°C

Three-Phase Unit Calculator

Fill in two values to find the 3rd.

W = LC * (V * √2)

Watts

V = (W / LC) / √2

Voltage

LC = W / (V * √2)

Line Current

Single Phase Unit Calculator

Fill in two values to find the 3rd.

W = LC * V

Wattage

V = LC * W

Voltage

LC = W / V

Line Current

Ohms Law Calculator

Fill in two values to find the other two.

O = V / A

O = V² / W

O = W / A²

Ohms

V = A * O = A * (V/A)

V = √(W * O)

V = W / A

Volts

A = V / O

A = W/ V

A = √(W / O)

Amps

W = A * V

W = V² / O

W = A² * O

Watts

Heat Transfer Through Convection Calculator

ρ = density (lb/ft3)

V = volume flow rate (ft3/hour)

Cp = specific heat (Btu/lb°F)

Ta-Tb = temperature differential (°F)

Q = ρ x V x Cp x (Ta-Tb)

Fill in four values

ρ = density (lb/ft3)

V = volume flow rate (ft3/hour)

Cp = specific heat (Btu/lb°F)

Ta-Tb = TD (°F)

Ta-Tb

Q = ρ x V x Cp x (Ta-Tb)

ACFM to SCFM

ACFM = airflow in actual cubic feet per minute

P = gage pressure (psi)

T = gas temperature °R = 460 + °F

SCFM = airflow in standard cubic feet per minute

Find Standard Cubic Feet per Minute based on data from your Actual Cubic Feet per Minute Rotameter

airflow in actual cubic feet per minute

ACFM

gage pressure (psi)

gas temperature °R = 460 + °F

T (°R)

airflow in standard cubic feet per minute

SCFM

Standard Flow Rate (SCFM) Calculator

Calculate the SCFM.

Actual cubic feet per minute

CFM

Actual pounds per square inch at Gauge

PSI

Actual temperature in °F. °R = 460 + °F

CFM * (PSI actual / 14.7psi)*(528°R / T actual)

SCFM

Pressure Conversion

Fill in one value to calculate the other.

PSI = Bar * 14.504

PSI

Bar = PSI / 14.504

Bar

Mass Flow to volume Metric Flow

Fill in one value to calculate the other two

kg/h = Kilogram Per Hour (lb/min multiply by 27.216)

kg/h

Lbs/min = Pounds per minute (kg/h divide by 27.216)

lbs/min

SCFM = Standard cubic feet per minute

SCFM