VACUUM
TEMPER FURNACES
The C.I. Hayes “VMH-T/R” Vacuum Temper Furnace is a vacuum purge inert atmosphere
furnace that is designed to provide excellent temperature uniformity, rapid heating and rapid
cooling performance in a single chamber design.
The furnace can process a wide range of materials for aging, annealing, brazing, joining, stress
relieving and tempering, in single or multiple step programmable cycles.
The VMH-T/R’s cold wall shell does not discharge heat into the room while ensuring vacuum
integrity.
Heating/Cooling Chamber
The combination heating and cooling chamber is
constructed of high density ceramic fiber board
insulation backed with fiber blanket material and
supported by a perforated steel cage structure.
Incorporated into the cage are movable rungs that
are opened during the cooling phase.
Heating Elements
Wire wound coil heating elements are mounted on
the inner cylindrical wall of the heating chamber in a
360° arrangement. The elements are supported by
ceramic insulators and constructed of heavy cross
section material yielding long life. The mounting
method allows for superior heat distribution to all
locations within the workload.
Circulating Fan
A vacuum tight fan is used to circulate inert
atmosphere throughout the workload during both
the heating and cooling cycles. It is the combination
of radiant and convective heat transfer to the work
that provides excellent uniformity. This assembly is
mounted as an integral part of the vacuum chamber
on the rear head.
Work Support Assembly
The hearth consists of either pier or roller rails that are
supported off the bottom of the vessel. The work and/
or work baskets are loaded on an alloy grid that is
rolled or placed into the furnace.
Cooling
At the completion of the heating portion of the cycle,
a rear “bung” and a front insulating panel open. This
allows the circulating atmosphere out of the heating
chamber, along the cold vessel walls for heat transfer,
and back through the heating chamber.
Component Design
Each component section of the furnace has been
engineered for ease of equipment operation,
maintenance and long life under full production
conditions.
F U R N A C E
The VMH-T/R Vacuum Temper Furnace
can be
provided in a variety of standard sizes to meet a variety
of production rates.
Standard options extend the performance of these
units and provide additional operator convenience.
33 Freeway Drive, Cranston, RI 02920 | 401.467.5200 | furnace-sales@cihayes.com | www.cihayes.com
G R O U
SPECIFICATIONS
Models:
VMH-T/R-242436
VMH-T/R-363648
Working Dimensions:
24”H x 24” W x 36”L
(609mm x 609mm x 914mm)
36”H x 36” W x 48”L
(914mm x 914mm x 1219mm)
Hearth Level:
40” (1016mm)
40” (1016mm)
Maximum Operating Temperature:
1450°F (787°C)
1450°F (787°C)
Uniformity:
20°F Spread (10°C)
30°F Spread (17°C)
Heating Elements:
Nickel-Chromium
Nickel-Chromium
Load Capacity (Nominal):
800# (362kg)
1500-3000# (680-1360kg)
Connected Load:
60KW
120KW
Heat-Up Rate:
800# Load of 1” (25mm) Diameter Steel Bars to:
1000°F in 75 mins or 350°F in 20 mins
(537°C in 75 mins or 176°C in 20 mins)
1600# Load of 1” (25mm) Diameter Steel Bars to:
1000°F in 75 mins or 350°F in 20 mins
(537°C in 75 mins or 176°C in 20 mins)
Operating Pressure:
0.5 PSIG Positive Pressure to Below 100 microns
0.5 PSIG Positive Pressure to Below 100 microns
Vacuum Components:
6” (152mm) Pneumatically Operated Vacuum Valve
Mechanical Pump 150 CFM (7.5HP Motor)
Roots Type Blower 850 CFM (3HP Motor)
6” (152mm) Pneumatically Operated Vacuum Valve
Mechanical Pump 150 CFM (7.5HP Motor)
Roots Type Blower 1285 CFM (10HP Motor)
Fan Assembly:
Vacuum Tight with 15HP Motor
Vacuum Tight with 10HP Motor
Cooling Water:
Steady State -10 GPM (37 LPM)
Quench Cycle - 30 GPM (113 LPM)
Steady State -10 GPM (37 LPM)
Quench Cycle - 30 GPM (113 LPM)
Cool Down Rate:
800# Load of 1” (25mm) Diameter Steel Bars from:
1000°F to 150°F in 45 mins
(537°C to 65°C in 45 mins)
1500# Load of 1” (25mm) Diameter Steel Bars from:
1000°F to 150°F in 60 mins
F U R N A C E
(537°C to 65°C in 45 mins)
Nitrogren Backfill:
144 ft (43 m )
330 ft (100 m )
Compressed Air Requirements:
Small Demand at 90 PSIG (0.62 MPa)
Small Demand at 90 PSIG (0.62 MPa)
Floor Space:
102”H x 210”W x 204”L
(2590mm x 5334mm x 5181mm)
115”H x 276”W x 203”L
(2921mm x 7010mm x 5156mm)
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33 Freeway Drive, Cranston, RI 02920 | 401.467.5200 | furnace-sales@cihayes.com | www.cihayes.com
G R O U
F U R N A C E
G R O U P
Product Listing
Continuous Belt Furnaces
Sintering Furnaces
Brazing Furnaces
Steam Treat Furnaces
Annealing Furnaces
Austempering Furnaces
Normalizing
Stress Relief Furnaces
Tempering Furnaces
Mesh Belt Furnaces
Solid Belt Furnaces
Cast Link Furnaces
Humpback Conveyor Furnaces
Other Continuous Furnaces
Pusher Furnaces (2000°-3000° F)
Pusher Furnaces (below 2000° F)
Roller Hearth
Walking Beam
Vacuum Furnaces
Continuous & Modular
Batch
Integral, Gas, Pressure & Oil Quench
Batch Furnaces
Sintering Furnaces
Carburizing Furnaces
Carbonitriding Furnaces
Normalizing Furnaces
Spheroidize Annealing Furnaces
Stress Relieving Furnaces
Brazing Furnaces
Annealing Furnaces
Tempering Furnaces
Box & Slot Furnaces (above 2000° F)
Steam Treat Furnaces
Bell (Carbon) Furnaces
Quenching Furnaces
Tip-Up Furnaces
Atmosphere Tip-Up Furnaces
Tempering Pit Furnaces
Carburizing Pit Furnaces
Nitriding Pit Furnaces
Car Bottom Furnaces
Tool Room Furnaces
Atmosphere Generators
Exothermic Gas up to 3000 CFH
Exothermic Gas up to 20000 CFH
Endothermic Gas up to 12000 CFH
Ammonia Dissociators up to 10000 CFH
Atmosphere Dryers
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Parts Washers
Charge Cars
Fabrications
Automation
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Accelerated Delubrication Units
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Powder Handling Equipment
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500# Barrel Dumpers
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Furnace Load/Unloaders
Rebuild Services
Spare Parts
Training
Field Service
KEY
A: Atmosphere
V: Vaccuum
www.gasbarrefurnacegroup.com
Sinterite
C.I. Hayes
J.L. Becker
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