cress furnaces - eps ovens · pdf file · 2017-12-16cress furnaces meeting your...

Cress FurnacesMeeting your needs in diff erent applications:

Metal, Glass and Quartz

Cress Manufacturing Co.

Bringing you years of

experience in the

heat treating industry.

Quality low cost

with a fast turnaround.

Let us help you with your heat processing needs.

Cress Manufacturing Company Inc. • 4736 Convair Drive • Carson City, Nevada 89706-0493 2 Call Us 800-862-7377 • 775-884-2777 • Fax 775-884-2991 • Visit our website www.cressmfg.com or e-mail us at [email protected]

Cress Manufacturing Company Inc., is a leader in the industry of manufacture of electric furnaces. We are an organization that provides services and goods for the heat treating industry. Our goal is to achieve an excellent product to satisfy the needs and requirements of our customers. Cress was founded in 1973, as a company with a simple concept to provide exceptionally high quality products and services. With this goal in mind, Cress has evolved into a very important manufacturer and distributor of heat treating furnaces, in the United States and many other countries. We manufacture, export and distribute heat treating furnaces for the metal industry, quartz glass, industrial ceramics, jewelry, porcelain, pottery, ornamental ceramics and many other applications.

Furnace Selection Our industrial furnaces can be classified as one of two basic types, “Heat Treating Furnaces” also known as

hardening furnaces and “Draw Furnaces” also known as annealing, tempering or forced convection furnaces.

Heat treat (Hardening) furnaces have higher heat output power than draw furnaces due to the elevated

temperatures at which they operate. Heat transfer to the tool steel is accomplished by a very efficient

process called direct radiation. Temperature uniformity in these furnaces is best in the red heat range.

Normal maximum temperature is 2250 °F (1232 °C). Optional 2400 °F (1316 °C) maximum temperature

versions are available.

Draw furnaces are used for tempering and other low temperature processes. They normally operate

at temperatures below red heat range where heat transfer to the tool steel is accomplished by the process

of convection heat transfer. To increase convection efficiency, these furnaces are equipped with a fan in

the heating chamber to move air (Forced Convection). This delivers a temperature uniformity of ± 10 °F

(± 6 °C) or better. Maximum temperature is 1250 °F (677 °C). Optional 2000 °F (1093 °C) maximum

temperature versions are available.

Heat treating processes consist of two basic steps, hardening and tempering.

Hardening processes occur at high temperatures that are well into the red heat range. Drawing, tempering

and annealing processes normally occur at temperatures below red heat range.

When a part is hardened, it is heated to a high temperature, held there for a required time period, then

removed from the furnace to be quenched (Cooled). This is usually accomplished by submerging the part into a

liquid quenching material or by placing the part on a cooling rack in still air. The part should only be cooled to

about 150 °F (66 °C), and then placed into a furnace at the tempering temperature. Due to the heat treat furnace

not being able to cool as fast as the part, it is best to have a separate furnace for each step of the process.

For our company, innovation is essential to transform a good idea into a product or service of high value to our customers. We can adapt to the needs of our customers; therefore, if you have something in mind we can build it for you. With these ideas in mind, we strive to provide better services and products that will last and provide years of service.

Call Us 800-862-7377 • 775-884-2777 • Fax 775-884-2991 • Visit our website www.cressmfg.com or e-mail us at [email protected] 3

Digital temperature controls fall into two basic types, process controllers and high limit controls (over temperature controls). Process Controls handle the temperature and time requirements of the heat treat processes. Th ese controls come in two types, non-programmable (single set point) and programmable. Non-Programmable controls such as the model 935 are a single set point control, you simply input the desired temperature, along with a length of time to hold this temperature once achieved. Th e furnace heats to the desired temperature as fast as possible, holds for the amount of time, then ends the process. At the end of the process, the control can either hold the temperature or let the furnace cool down. Th e timer can be disabled. When disabled the control only requires a temperature setting input. Th e furnace will stay at the set temperature until changed or turned off . Th is is the least expensive standard control. Programmable Controls such as the models SD4R

and the F4H allow the heat up rate to be controlled, temperature can be ramped down as well as ramped up, multi-step heat treating can be input as a single process, and heat treat process programs can be stored in the controls memory for easy and accurate repeatability. In manual mode (non-program), the controls work the same as the model 935 with the timer disabled. High Limit Controls such as the model LV help protect the furnace and load in the case of a failure in the primary (process) control or other related primary control loop components. Th e high limit control loop is completely independent of the primary control loop. All control types are available with an optional audible alarm feature, which can signal a given process point or end of process. Th e programmable process controls are available with an optional data communication package which allows full control interface with a computer.

Digital Temperature Control Selection

WATLOW 935 CONTROLSMicroprocessor based single set-point control with soak timer.Interface: Membrane front panel, single four digit LED’s

WATLOW SD4 STANDARD CONTROLFOUR 10 STEP PROGRAM MEMORY FILESMicroprocessor-based, ¼ DIN programmable ramping control providing four, 10 step program memory fi les, or easy to use non-ramping set point operation. Th e SD4 is designed to operate in the most demanding industrial environments.Interface: Front panel push buttons, LED displays

WATLOW F4H CONTROL 250 STEP RAMPING CONTROL

This microprocessor based ¼ DIN ramping control providing 250 steps of programmability

within up to 40 nameable profi les.Control over broad temperature ranges using

the four sets of PID parameters.Interface: Membrane front panel, single four

digit LED’s with second four line LCD display.

WATLOW HIGH LIMIT CONTROL OPTIONAL ADDITION

TO PRIMARY CONTROL Th is FM approved limit control is operated using a separate thermocouple. Mechanical relays break

power to the elements when tripped. A High Limit Control

gives added assurance at a small cost that the furnace and materials fi red do not exceed the temperature indicated.


USES: Th ese models are designed for those users who require automatic temperature controlled furnaces from 250° F to 2000° F (Model C-601) or up to 2250° F (Model C401H) at a low cost. An ideal unit for many of the small jobs found in Tool rooms, Production Shops or Laboratory.TEMPERATURE CONTROL: Auto tuning Microprocessor – Based controller.ELEMENTS: C-601 chrome nickel wire. C401H — High Temperature iron-aluminum wire.WIRING: Furnace is completely wired and equipped with cord ready to plug into a 115 Volt outlet. Control, relay and wiring connections are enclosed on the base.GENERAL CONSTRUCTION: Furnace case of sheet steel is assembled by use of electrical welding and sheet metal screws. Th e spring counter-balance door rises vertically on lever arrangement keeping the hot face away from operator. Th e C401H walls and door are constructed of high quality insulating brick backed by 1800° F block insulation. Furnace is fi nished in heat resistant hammer tone gray. SAFETY SWITCH: Th ese models come equipped with a door safety switch. When door is opened, power is disconnected from the heating elements.

MODEL

CHAMBER SIZE

W L H

OVERALL SIZE

W L H

MAXIMUM IN-TERMITTENT

TEMPERATURE

MAXIMUM CONTINUOS

TEMPERATUREKW

INPUT WEIGHT / LBSC401H 6.5” 9” 5.5” 15.5” 17.5” 22” 2250˚ F 2000˚ F 1.6 100

C601 8.5” 10” 6.5” 15.5” 17” 22” 2000˚ F 1800˚ F 1.4 100

MODELCHAMBER SIZE

W L HOVERALL SIZEW L H

MAXIMUM INTERMIT-TENT TEMPERATURE

MAXIMUM CONTINUOUS TEMPERATURE

KW INPUT

WEIGHT LBS

C133 11.5” 13” 8” 26” 28” 24” 2250˚ F 2000˚ F 3 200C136 11” 13” 8” 15.5” 17” 22” 2250˚ F 2000˚ F 3 200

Models C-601 and C401H

Options:Dual chamber • Stainless steel case

Audible process alarm.

Model C 133 and C136USES: Th ese furnaces are designed for general use in the shop, laboratory or factory where temperatures from 300˚ F to 2250˚ F are required. Th ey are used for heat treating metal, assaying and all types of testing.TEMPERATURE CONTROLS: Auto tuning Microprocessor-based controller.ELEMENTS: High temperature iron-aluminum alloy wire elements are coiled and mounted on the side walls in porcelain plates. THE C133 has a bottom element mounted in groves in fl oor and covered by refractory heart plate.MODEL C136 assaying furnace has no bottom element and the side elements are raised 1.75” above the fl oor to prevent burnout due to spillage.GENERAL CONSTRUCTION: Case is constructed of heavy gauge sheet steel and fi nished in gray hammertone. Th e easily operated, counter-balanced door is always away from operator. All walls and door are constructed of the fi nest quality insulating fi re brick backed by 1800˚ F block insulation. Comes complete with cord and plug.SAFETY SWITCH: Th ese models come equipped with two door safety switches. When door is opened, elements are disconnected from power source. Solid state zero voltage switching of power to elements.

OPTIONS:C136 available as a dual chamber furnace • Assaying, includes, embedded elements and a clean air exhaust system installed

Stainless steel port option for protective inert atmosphere • Audible process alarm


HEAT TREAT FURNACES

MODEL

CHAMBER SIZE

W L HOVERALL SIZE

W L H

MAXIMUM INTERMITTENT TEMPERATURE

MAXIMUM CONTINUOUS TEMPERATURE KW INPUT

WEIGHT LBS

C1228 12” 20” 8” 25” 34” 28” 2250˚ F 2000˚ F 8 300

C1232 12” 32 ” 8” 25” 45” 28” 2250˚ F 2000˚ F 5 350

C1240 12” 40” 8” 25” 54” 28” 2250˚ F 2000˚ F 5 600

C1250 12” 50” 8” 25” 64” 28” 2250˚ F 2000˚ F 11.5 650 C122012 12” 20” 12” 25” 34” 32” 2250˚ F 2000˚ F 5 450 C162010 16” 20” 10” 29” 34” 31” 2250˚ F 2000˚ F 9 400

C162012 16” 20” 12” 29” 34” 33” 2250˚ F 2000˚ F 9 550

C163210 16” 32” 10” 29” 46” 31” 2250˚ F 2000˚ F 11.5 500

C163212 16” 32” 12” 29” 46” 33” 2250˚ F 2000˚ F 11.5 550

Heat treat with the inimitable Cress C1228 Furnace, amazingly accurate. The ultimate Furnace-Control Combination that insure precisely repeatable results.

Bench Top Heat Treating FurnacesUSES: These furnaces are designed for general use in the shop, laboratory or factory where temperatures from 300˚ F to 2250 °F are required. They are used for heat treating metal, assaying and all types of testing. 2400˚ F Maximum temperature option available at additional cost.TEMPERATURE CONTROLS: Auto tuning Microprocessor-based controller.HEATING ELEMENTS: Alloy wire elements are coiled and mounted on the side walls in easy to change porcelain plates. GENERAL CONSTRUCTION: The furnace case is constructed of heavy gauge sheet steel and finished in gray hammertone. The walls and door are constructed of the finest quality insulating fire brick backed up by 1800˚ F block insulation. SAFETY SWITCH: These models come equipped with dual door safety switches. When the door is opened, power is disconnected from the heating elements. DOOR: The counter balanced easy to operate door, opens up and away from the furnace, keeping the hot side away from the operator. A KAOWOOL® rope seal is installed on the door where it meets the chamber.

Options:Stands and quench tanks for these model furnaces are available for an additional cost

Optional inlet port for protective inert atmosphere is availableOptional high limit control available • Audible process alarm


MODEL

CHAMBER SIZE

W L HOVERALL SIZE

W L H


MAXIMUM CONTINUOUSTEMPERATURE

KW INPUT WGHT/LBS

C1228 DW 12” 17” 8” 25” 43” 28” 1250˚ F 1000˚ F 3.5 400 lbs

C1232DW 12” 29” 8” 25” 54” 28” 1250˚ F 1000˚ F 5 500 lbs

C1240DW 12” 37” 8” 25” 62” 28” 1250˚ F 1000˚ F 5 700 lbsC1250DW 12” 47” 8” 25” 63” 28” 1250˚ F 1000˚ F 7 850 lbs

C122012DW 12” 17” 12” 25” 43” 32” 1250˚ F 1000˚ F 3.5 550 lbs

C162010DW 16” 17” 10” 29” 43” 31” 1250˚ F 1000˚ F 6 500 lbs

C162012DW 16” 17” 12” 29” 43” 31” 1250˚ F 1000˚ F 6 650 lbs

C163210DW 16” 29” 10 ” 29” 54” 31” 1250˚ F 1000˚ F 7 600 lbs

DRAW UNITS: These models are equipped with a stainless steel fan and motor for forced convection temperature uniformity.USES: These furnaces are designed for general use in the shop, laboratory or factory where temperatures from 300-1250˚ F. ±10 °F are required. They are used for such purposes as tempering, annealing and stress relieving. 2000˚ F maximum temperature option is available for all models at additional cost.TEMPERATURE CONTROLS: Auto tuning Microprocessor-based controller and solid state relays for precise temperature control.HEATING ELEMENTS: Alloy wire elements are coiled and mounted on the side walls in easy to change porcelain plates. GENERAL CONSTRUCTION: The furnace case is constructed of heavy gauge sheet steel and finished in gray hammertone. The walls and door are constructed of the finest quality insulating fire brick backed up by 1800˚ F block insulation. Comes complete with cord and plug.SAFETY SWITCH: These models come equipped with dual safety switches. When the door is opened, power is disconnected from the heating elements and fan motor. DOOR: The counter balanced easy to operate door, opens up and away from the furnace, keeping the hot side away from the operator. A KAOWOOL® rope seal is installed on the door where it meets the chamber.

Bench Top Tempering Furnaces

OPTIONS:Stands and quench tanks for these

model furnaces are available for an additional costAudible process alarm

Optional high limit controls available


HEAT TREAT FURNACES

MODELCHAMBER SIZE

W L HOVERALL SIZE

W L HMAXIMUM INTERMITTENT

TEMPERATUREMAXIMUM CONTINUOUS

TEMPERATURE KW

INPUTWEIGHT

LBSAC136 11” 13 ‘ 8” 23.5” 32” 27 2250˚ F 2000˚ F 3 200

AC1228 12” 20” 8” 25” 34” 28” 2250˚ F 2000˚ F 8 300

AC1232 12” 32 ” 8” 25” 45” 28” 2250˚ F 2000˚ F 5 350

AC1240 12” 40” 8” 25” 54” 28” 2250˚ F 2000˚ F 5 600

AC1250 12” 50” 8” 25” 64” 28” 2250˚ F 2000˚ F 11.5 650 AC122012 12” 20” 12” 25” 34” 32” 2250˚ F 2000˚ F 5 450 AC162010 16” 20” 10” 29” 34” 31” 2250˚ F 2000˚ F 9 400

AC162012 16” 20” 12” 29” 34” 33” 2250˚ F 2000˚ F 9 550

AC163210 16” 32” 10” 29” 46” 31” 2250˚ F 2000˚ F 11.5 500 AC163212 16” 32” 12” 29” 46” 33” 2250˚ F 2000˚ F 11.5 550

Assaying Bench Top Furnaces

OPTIONS:Stands and quench tanks for these model furnaces

are available for an additional cost.Optional inlet port for protective inert atmosphere is available.

Optional high limit control available. Audible process alarm.

USES: These furnaces are designed for assaying use in the shop, laboratory or factory where temperatures from 300˚ F to 2250°F are required. They are used for assaying, heat treating metal and all types of testing. TEMPERATURE CONTROLS: Auto tuning Microprocessor-based controller.SPECIAL FEATURES: Embedded elements and clean air exhaust system is installed. GENERAL CONSTRUCTION: The furnace case is constructed of heavy gauge sheet steel and finished in gray hammertone. The walls and door are constructed of the finest quality insulating fire brick backed up by 1800˚ F block insulation. Alloy wire elements are coiled and mounted on the side walls in easy to change porcelain plates. SAFETY SWITCH: These models come equipped with dual door safety switches. When the door is opened, power is disconnected from the heating elements. DOOR: The counter balanced easy to operate door, opens up and away from the furnace, keeping the hot side away from the operator. A KAOWOOL® rope seal is installed on the door where it meets the chamber.


USES: Designed for those who desire a hardening furnace, a quench tank plus a separate furnace for tempering or drawing all within a Minimum floor space. The two chambers allow for immediate tempering or drawing after quench without waiting for the hardening furnace to cool to the lower temperature required.Controls: Both chambers are equipped with their own electronic control, thermocouples and solid state relays. Auto tuning microprocessor based controls are accurate to ± 1/4 of 1%. Each chamber is equipped with door safety switches that remove power from that chambers heating elements and fan blower.HEATING ELEMENTS: Alloy wire elements are coiled and mounted on the side walls in easy to change porcelain plates. GENERAL CONSTRUCTION: Case is constructed of galvanized sheet metal and mounted in angle steel frame. Space is provided for air circulation between chambers, the quench tank is stored beneath the lower chamber and can be rolled out for use. The control panel face is attractive brushed stainless steel.The upper chamber door rises vertically, the lower chamber door swings to the side. A heavy duty chrome plated latch is used to hold the lower door closed. The lower chamber is equipped with a stainless steel, centrifugal type fan to circulate the air and provide very close temperature gradients. The fan is operated by a 1/4 HP motor.Easy access to controls and wiring is provided by removable side panel on control cabinet.Welded steel plate quench tank on caster is standard on most dual units.Door seal is standard for inert protective atmosphere on 2250˚F chambers.

MODEL

UPPER CHAMBER

SIZE W L H

LOWERCHAMBER

SIZEW L H

OVERALL SIZEW L H

MAXIMUM TEMPERATURE

UPPER CHAMBER

MAXIMUM TEMPERATURE

LOWERCHAMBER

KW INPUT

WEIGHTLBS

C136D 10.5” 13” 8” 10.5” 10” 8” 25” 43” 28” 2250˚ F 1250˚ F 6 400

C2121 12” 20” 8” 12” 17” 8” 36” 38” 56” 2250˚ F 1250˚ F 8.5 800C122012D 12” 20” 12” 12” 17” 12” 37” 38” 64” 2250˚ F 1250˚ F 8.5 950

C1232D 12” 32” 8” 12” 29” 12” 36” 50” 56” 2250˚ F 1250˚ F 8.5 900

C1240D 12” 40” 8” 12” 37” 8” 36” 58” 56” 2250˚ F 1250˚ F 516 1400

C163210D 16” 32” 10” 16” 29” 10 ” 43” 60” 62” 2250˚ F 1250˚ F 18.5 1400C163212D 16” 32” 12” 16” 29” 12” 43” 60” 66” 2250˚ F 1250˚ F 18.5 1400

OPTIONS:High limit controls available.

Inlet port for protective inert atmosphere is available.480 volts.3 phase.


Dual Furnace


AE Furnaces Single ChamberUSES: These furnaces are designed for heavy duty, larger volume jobs requiring controlled temperatures up to 2100 ºF continuous or 2250 ºF intermittent.CONTROLS: These furnace come standard with a digital programmable main control and a digital high limit safety control. Solid state power switching to the heating elements, and dual door limit safety switches that interrupt power to the elements when the door is opened. ELEMENTS: High temperature alloy wire elements are mounted in porcelain plates on the walls and floor and in grooves in the brick door, this provides all around heating and close gradients throughout the furnace chamber. A ceramic hearth plate covers the floor element.GENERAL CONSTRUCTION: Case is finished in a pleasing gray hammertone. The counter-weighted vertical rising door keeps the hot face away from the operator, it opens easily, remains securely in both the open and close positions and includes a Kaowool® rope seal. All walls and door are constructed of 4 ½” of the finest quality insulating fire brick backed up by 2” of 1800 ºF block insulation. This combination of insulation and wall thickness helps to give fast heat up and excellent heat retention for economical operation. All Standard 240 VAC, 3 Phase.

Options:Side opening door.

DW models for drawing include stainless steel fan to circulate air and provide very close temperature gradients.

Quench tanks for AE models are available for an additional cost.Stainless steel port option for protective inert atmosphere operation is available.

Optional 208 or 480 VAC, 3 Phase.Draw units available with an optional 2000˚ F Maximum temperature fan.


AE HEAT TREAT FURNACES SPECIFICATIONS

MODEL

CHAMBER SIZE

W L HOVERALL SIZE

W L H


MAXIMUM CONTINUOUS TEMPERATURE

KW INPUT WEIGHT/LBS

AE1520 15” 20” 15” 33” 46” 76” 2250˚ F 2100˚ F 9 1200

AE1824 18” 24” 18” 36” 50” 70” 2250˚ F 2100˚ F 14 1400

AE1836 18” 36” 18” 36” 62” 70” 2250˚ F 2100˚ F 20 1800

AE1848 18” 48 ” 18” 36” 74” 70” 2250˚ F 2100˚ F 23 2200

DRAW UNITSAE1520DW 15” 15” 15” 33” 46” 67” 1250˚ F 1200˚ F 9 1400

AE1824DW 18” 19” 18” 36” 50” 70” 1250˚ F 1200˚ F 14 1600

AE1836DW 18” 31” 18” 36” 62” 70” 1250˚ F 1200˚ F 20 2050 AE1848DW 18” 43” 18” 36” 74” 70” 1250˚ F 1200˚ F 23 2400


AE DUAL FURNACES SPECIFICATIONS

MODEL

UPPER CHAMBER

SIZE W L H

LOWERCHAMBER

SIZEW L H

OVERALL SIZEW L H

MAXIMUM TEMPERATURE

UPPER CHAMBER

MAXIMUM TEMPERATURE

LOWERCHAMBER

KW INPUT

WEIGHTLBS

AE1520D 15” 20” 15 ” 15” 15” 15 ” 33” 46” 67” 2250˚ F 1250˚ F 18 2000

AE1824D 18” 24” 18” 18” 19” 18” 36” 50” 70” 2250˚ F 1250˚ F 27 2500AE1836D 18” 36” 18” 18” 31” 18” 36” 62” 70” 2250˚ F 1250˚ F 36 3200

AE1848D 18” 48” 18” 18” 43” 18” 36” 74” 70” 2250˚ F 1250˚ F 41 4000

AE Dual FurnacesModels: AE1520D, AE1824D, AE1836D and AE1848D

OPTIONS: Both doors side opening • 2000 ºF lower chamber

Stainless steel port option for protective inert atmosphere operation for upper chamber.

Quench tanks for AE models are available for an additional cost.Audible process alarm.

Optional 208 or 480 VAC, 3 Phase.

USES: Designed for those who desire a large hardening furnace plus a separate furnace for tempering or drawing, all within a Minimum floor space. The two chambers allow for immediate tempering or drawing after quench without waiting for the hardening furnace to cool to the lower temperature required.CONTROLS: These furnaces come standard with two sets of individual digital programmable control and a digital high limit safety control. Solid state power switching to the heating

elements. Each chamber is equipped with dual door limit safety switches that interrupt power to the elements when the door is opened. Fan stops when lower door is opened. (Note: door blocks view of the lower set of controls)ELEMENTS: High temperature alloy wire elements are mounted in porcelain plates on the walls and floor and in grooves in the brick door, this provides all around heating and close gradients throughout the furnace chamber. A ceramic hearth plate covers the floor element.

GENERAL CONSTRUCTION: Furnace frame is constructed of heavy steel angle with 18 gauge sheet steel metal panels to form exterior case. Door of upper unit rises vertically and the door of the lower unit swings to the side. A Kaowool® rope seal is installed on the upper and lower doors where it meets the chamber. A chrome refrigerator latch is used to hold the lower door closed. Lower unit is equipped with an stainless steel, centrifugal type fan to circulate the air and provide very close temperature gradients. The fan is operated by a 1 HP motor. All Standard 240 VAC, 3 Phase.


SPECIFICATIONS

MODELCHAMBER SIZE




KW INPUT

WEIGHTLBS

C30FH 24” 24” 30” 52” 40” 67” 2250˚ F 2000˚ F 14 1400C36FH 24” 24” 36” 52” 40 ” 73” 2250˚ F 2000˚ F 14 1600C30FHDW 24” 24” 30” 24” 24” 30” 1250˚ F 1050˚ F 14 1400

C36FHDW 24” 24” 36” 24” 24” 30” 1250˚ F 1050˚ F 14 1600

Models C30FH and C36FH

USES: Th ese large capacity furnaces can be used for various types of heat treatment processes which require temperatures up to 2100 ºF continuos temperature or 2250 °F intermittent.CONTROLS: Th ese furnaces come standard with a digital programmable main control and a digital high limit safety control. Solid state power switching to the heating elements, and dual door limit safety switches that interrupt power to the elements when the door is opened. All wiring is complete and ready to be connected to your power source. Input controls allow operator to adjust temperatures of various zones so that uniform temperatures can be had throughout the chamber.ELEMENTS: High temperature alloy wire elements are mounted in grooves on the walls and door, this provides all around heating and close gradients throughout the furnace chamber. GENERAL CONSTRUCTION: Furnace frame is constructed of 2½” x 2½” x 3/16” angle steel with 18 gauge sheet steel panels. Th e door is mounted on heavy hinges on the side and secured in the closed position with a heavy duty latch. A Kaowool® rope seal is installed on the door where it meets the chamber. Th e exterior is fi nished in a hammertone gray enamel. Walls are constructed of 4½” of insulating brick backed up by 2” of 1800 °F block insulation.Th e 24” x 24” x 30” chamber in the C30FHWC gives you 10 cubic ft. of space, and the 24” x 24” x 36” chamber in the C36FH gives you 12 cubic ft. of space.Standard 240 VAC, 3 Phase . 208 or 480 VAC optional. Also available with an optional vertical rising door.

OPTIONS:Vertical opening door.

Stainless steel port option for protective inert

atmosphere operation is available.

Draw units available with an optional

2000˚ F Maximum temperature fan

Quench tanks are available for an additional cost

Audible process alarm


Models C336 and C444

SPECIFICATIONS

MODEL

CHAMBER SIZE



TEMPERATURE


KW INPUT WEIGHT/LBS

C336 36” 36” 36” 52” 65” 78” 1950˚ F 1750˚ F 27 2400C444 48” 48” 48” 64” 77” 90” 1950˚ F 1750˚ F 72 3000

USES: These large capacity furnaces can be used for various types of heat treatment processes which require temperatures from 200 ºF to 1950 ºF. The 6 bladed axial flow fan mounted in the roof circulates the air within the chamber resulting in close gradients throughout. OPTION: 2250 ºF rating using a 4 zone control package.CONTROLS: These furnaces come standard with a digital programmable main control and a digital high limit safety control. Solid state power switching to the heating elements, and dual door limit safety switches that interrupt power to the elements when the door is opened. All wiring is complete and ready to be connected to your power sourceELEMENTS: Heavy chrome-nickel wire elements are coiled and mounted in grooves in walls and door to provide all around heating which also helps produce close gradients throughout the chamber. GENERAL CONSTRUCTION: Furnace frame is constructed of heavy steel angle with 18 gauge sheet metal panels to form exterior case. Case is finished in a pleasing gray hammertone. The vertical rising door is mounted on heavy levers and is opened by lifting up on a wide handle. The counterweight holds the door up in the raised position and the weight of the door gives a good brick seal in the lowered position. A Kaowool® rope seal is installed on the door where it meets the chamber. This door protects the operator from burns because the hot surface always faces away from him. Door opens manually very smoothly and easily. All walls and door are constructed of 4½” of the finest quality insulating brick backed up by 1½” of block insulation. The roof is arched giving added strength and providing space for fan. This combination of insulation and wall thickness helps to give fast heat up and excellent retention for economical operation.

OPTIONS:480 Volt, 3 Phase.

2250 ºF Maximum Temperature Option.Optional Heating Coils In Plate.

Optional Embedding Of Heating Coils In PlateOptional Temperature Recorders Are Available

Audible Process Alarm

C444, shown with optional embedded heating

elements in plates.


Glass and Quartz Annealing Furnaces

USES: These furnaces are designed primarily for annealing glass, and use as a bake out oven. However, it can be used for any purpose requiring controlled temperatures of up to 2250 ºF. When inquiring, please state temperature desired.CONTROLS: These furnaces come standard with a digital programmable main control and a digital high limit safety control. Solid state power switching to the heating elements, and dual door limit safety switches that interrupt power to the elements when the door is opened. ELEMENTS: High temperature alloy wire elements are mounted in grooves in the brick walls. The design of the heating coils provides all around heating and close gradients throughout the furnace chamber.GENERAL CONSTRUCTION: Heavy angle steel frame with 18 gauge sheet metal panels form the case. The walls are constructed of 4.5” of the finest quality insulated firebrick backed up by 1800 ºF block insulation. Counterweight lid opens easily. The lid is insulated with ceramic fiber or brick. This combination of insulation and wall thickness helps to give fast heat up and excellent heat retention for economical operation.

SPECIFICATIONS G SERIES FURNACES

MODELCHAMBER SIZE

W L HOVERALL SIZE

W L HMAXIMUM INTERMITTENT

TEMPERATUREMAXIMUM CONTINUOUS

TEMPERATURE KW

INPUTWEIGHT

LBSG4H 12” 12” 48” 71” 34” 75” 2250˚ F 2100˚ F 15 790

G5H 12” 12” 60” 71” 34” 87” 2250˚ F 2100˚ F 18 990 G6H 12” 18” 48” 70” 40” 75” 2250˚ F 2100˚ F 18 1185

G7H 18” 18” 36” 80” 40” 63” 2250˚ F 2100˚ F 16 1035G8H 12” 12” 96” 71” 34” 123” 2250˚ F 2100˚ F 20 1685

G9H 18” 18” 48” 80” 40” 75” 2250˚ F 2100˚ F 20 1150

G11H 18” 18” 60” 80” 40” 87” 2250˚ F 2100˚ F 14 1200G18H 18” 18” 96” 80” 40” 123” 2250˚ F 2100˚ F 30 1600

G22H 18” 18” 120 ” 80” 40” 147” 2250˚ F 2100˚ F 34 2200

OPTIONS:480 volt 3 phase power. Audible process alarm.

Data communications package.


SPECIFICATIONS

MODELCHAMBER SIZE



TEMPERATURE


KW INPUT WEIGHT/LBS

R24S 36” 36” 21” 57.5” 112” 158” 1200˚ F 1000˚ F 30 2400R36S 36” 36” 36” 57.5” 112” 158” 1200˚ F 1000˚ F 45 3000

USES: These bottom opening quick quench furnaces, are designed for aluminum heat treatment to a maximum temperature of 1200 ºF. Temperature gradients are ± 5 ºF or less.CONTROLS: These furnaces come standard with a Model SD, digital LED readout microprocessor programmable control mounted in a separate free standing control cabinet. There is an independent digital high limit safety control and independent contactor and dual door limit safety switches that interrupt power to the elements and fan when the door is opened.ELEMENTS: Elements are heavy gage chrome-Nickel mounted in grooves on all four sidewalls of the furnace behind the stainless steel baffle. The design of the heating coils provides all around heating and close gradients throughout the furnace chamber. GENERAL CONSTRUCTION: Heavy angle steel frame with 18 gauge sheet metal panels form the case. The walls are constructed of 4.5” of the finest quality insulated firebrick backed up by 1800 ºF block insulation. This combination of insulation and wall thickness helps to give fast heat up and excellent heat retention for economical operation. The furnace door can be opened and the load rack lowered into the quench tank within six seconds. The door rolls easily on casters mounted on an inclined track. Air assist is used to raise and lower loads up to 1000 lbs. easily. The uniform temperature is accomplished by a 15” stainless steel fan mounted in the roof, which circulates air down the sidewalls and up through the load. A full stainless steel baffle within the furnace directs airflow. The insulated quench tank is mounted on V groove casters with a track so it can be rolled back out of the way.

Aluminum Drop Bottom

OPTIONS:Quench tank heater and circulation pump system

Stainless steel load basket480 volts 3 phase powerAudible process alarm

Data communications package


USES: Th ese bottom opening furnaces, are designed for heat treatment at temperatures up to 2250 ºF. Temperature gradients are ± 5 ºF or better.CONTROLS: Th ese furnaces come standard with an easy to use digital programmable 4 zone system and a high limit backup system. Mounted in a separate free standing control cabinet. Dual safety switches that interrupt the power to the heating coils when the unit is raised.ELEMENTS: Special PM elements for long life at low and high temperatures. Elements are heavy gage, mounted in grooves in all sidewalls of the furnace. Th e design of the heating coils provides all around heating and close gradients throughout the furnace chamber.

GENERAL CONSTRUCTION: Heavy angle steel frame holds the body of the furnace, the walls are constructed of 3” of the fi nest quality insulated fi rebrick. Th e furnace is bottom opening by means of a counterweight which lifts the entire furnace vertically above the base of the frame. A kaowool rope seal is installed in the bottom.. Close temperature uniformity tolerances are maintained during dynamic heat up, as well as top temperature soaks using matched thermocouples and four zone control.

Options:Stainless steel ports • 480 volts 3 phase power

Audible process alarmData communications package

2400°F Optional

SPECIFICATIONS

MODEL CHAMBER SIZE OVERALL SIZEMAX. INTERMITTENT

TEMPERATUREMAX. CONTINUOUS

TEMPERATUREKW

INPUTBT29 29” H X 23 3/8”

DECAGON 48” W, 50” L, 83” H 2250˚ F 2000˚ F 13.5

BT28 29” H, 28” DODECAGON

54” W, 57” L, 83” H 2250˚ F 2000˚ F 16.3

Cress Manufacturing Company Inc. • 4736 Convair Drive • Carson City, Nevada 89706-0493 16

QUENCH TANKS:W L H17 17 1717 34 17.

STANDS FOR BENCH TOP FURNACESAvailable for: C133, C136, C1228, C122012, C1232, C1240, C1250, For other models please ask us

TONGS: 45° 31.5” long and 37° are 39.25” long.

REFERENCE BOOK.Heat Treatment, Selection and Application of Tool SteelsBy William E. Bryson.

TOOL WRAP STATION.Foil wrap 24” width - 50 ft rolls 2000 °F Foil wrap 24” width - 100 ft roll 2000 °FFoil wrap 24” width - 50 ft roll high temperature 2240 °F

Accessories

cress furnaces - eps ovens · pdf file · 2017-12-16cress furnaces meeting your...

Documents