## MACHINED PLATE HEATERS

#### HEATED PLATENS

Please contact engineering for assistance

704-399-4248
sales@sethermal.com

STS offers a unique high temperature platen heater to extend the range available for a machined heater. The heater body is typically constructed of stainless steel, however other materials such as Nickel, Inconel®, or Copper can be used. The assembly is provided as a single component. A precise groove is machined into the heater body determined by the heat profile requirements of the surface. A mineral insulated heating element is press fit into the groove to guarantee intimate contact with the heater body, which optimizes heater life and temperature uniformity of the working surface. An available vacuum braze treatment is also available. In addition to high temperature platens, these units can be manufactured as pedestals and welded as vacuum tight.

Please contact engineering for assistance

Please contact engineering for assistance

Precision plate and component heater assemblies are designed for a wide range of extrusion, molding and packaging applications. The rugged, high performance assemblies provide exceptional performance in the heating of extrusion profile dies, blow-molding manifolds and die heads, wire cross head dies, extruder barrels, polymer pumps, and injection molds.

Cast-in plate(n) heaters are used in a wide variety of applications, which require a uniform heat source such as plastics, packaging, foodservice, and medical applications. Due to the flexibility of design parameters, these heaters are can be developed to suit specific sizes and heat patterns as the application dictates. The platens can be supplied with a thickness as small as ½” with surface finishes that range from “as cast” to a ground finish. Other options include mounting holes or bosses, threaded holes, cast-in stud terminals, recessed terminal exits, or special machined patterns on the platen surface. Special termination options such as lead wire extensions, quick disconnect plugs, or terminal boxes can be adapted to platen designs. Although aluminum is the predominant material used in heated platens, bronze alloys can be used for applications, which require higher temperatures. In addition, cooling tubes can be added for liquid cooled temperature control.

Various types of plating and coatings can be added to Durex platen heaters to increase the hardness of the working surface or comply with specifications required for the application. Teflon® coating can be applied for lower temperature applications that require wear resistance or chemical resistance. Electroless Nickel plating can be applied to add a durable finish for higher temperature applications. Anodized finishes can also be provided for increased hardness and improved surface quality. As with all engineered products, coatings must be selected carefully based on the individual application. Factors such as maximum operating temperature, handling of the working surface, and secondary cleaning operations must be considered before specifying a particular coating or process.

Calculate the electrical power, flow rate or temperature requirement.

airflow in standard cubic feet per minute

temperature rise in degrees F from the inlet to the exhaust

Watts = SCFM x ΔT/2.5

Calculate the electrical power, flow rate or temperature requirement.

°F = ((( °C * 9) / 5 ) + 32)

°C = ((( °F - 32) * 5 ) / 9)

Fill in two values to find the 3rd.

W = LC * (V * √2)

V = (W / LC) / √2

LC = W / (V * √2)

Fill in two values to find the 3rd.

W = LC * V

V = LC * W

LC = W / V

Fill in two values to find the other two.

O = V / A

O = V² / W

O = W / A²

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

V = √(W * O)

V = W / A

A = V / O

A = W/ V

A = √(W / O)

W = A * V

W = V² / O

W = A² * O

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)

Q = ρ x V x Cp x (Ta-Tb)

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

gage pressure (psi)

gas temperature °R = 460 + °F

airflow in standard cubic feet per minute

Calculate the SCFM.

Actual cubic feet per minute

Actual pounds per square inch at Gauge

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

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

Fill in one value to calculate the other.

PSI = Bar * 14.504

Bar = PSI / 14.504

Fill in one value to calculate the other two

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

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

SCFM = Standard cubic feet per minute

Calculate the electrical power, flow rate or temperature requirement.

airflow in standard cubic feet per minute

temperature rise in degrees F from the inlet to the exhaust

Watts = SCFM x ΔT/2.5

Calculate the electrical power, flow rate or temperature requirement.

°C = ((( °F - 32) * 5 ) / 9)

°F = ((( °C * 9) / 5 ) + 32)

Fill in two values to find the 3rd.

W = LC * (V * √2)

V = (W / LC) / √2

LC = W / (V * √2)

Fill in two values to find the 3rd.

W = LC * V

V = LC * W

LC = W / V

Fill in two values to find the other two.

O = V / A

O = V² / W

O = W / A²

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

V = √(W * O)

V = W / A

A = V / O

A = W/ V

A = √(W / O)

W = A * V

W = V² / O

W = A² * O

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)

Q = ρ x V x Cp x (Ta-Tb)

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

gage pressure (psi)

gas temperature °R = 460 + °F

airflow in standard cubic feet per minute

Calculate the SCFM.

Actual cubic feet per minute

Actual pounds per square inch at Gauge

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

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

Fill in one value to calculate the other.

PSI = Bar * 14.504

Bar = PSI / 14.504

Fill in one value to calculate the other two

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

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

SCFM = Standard cubic feet per minute