FurnacePros LA-309, Owner'S Manual

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Product Specification
Page 13 of 18 1303090MS01
LA-309 Controlled Atmosphere Infrared Furnace April 15, 2009
16.0 DESCRIPTION OF STANDARD AND SPECIAL FEATURES
Table 16-1 describes standard features which may be included on the specified furnace. See section
3.3 for list of items included in the base bid and section 3.4 for those offered as options.
Table 16-1. Base Equipment Features
KEY DESCRIPTION
AR1 Gas Reservoir (Belt Tensioner). Pressurized gas system with tank, check valve and separate regulator to maintain
constant pressure on belt even during short term failure or disconnect of the supply gas. Standard on all furnaces.
AR10 Air Reservoir, System Purge. Adds 30-56 L (8-15 gal) reservoir for supplying process gas in adequate quantity to
assure purging the furnace chamber of volatile or toxic gas in the event of a plant power failure. System includes
pressure switch and alarm integrated with the OI.
Standard on some applications, option available on most furnaces.
BE Entrance Baffle with Eductor. The Entrance Baffle/Exhaust Eductor is a 38.1 cm (15 inch) long section that serves
to isolate the furnace atmosphere from the facility atmosphere. The entrance baffle is housed inside an aluminum
shell lined with ceramic fiber insulation and includes a metal air rake to introduce a gas curtain above the belt. This
gas curtain purges the baffle and a series of four equally spaced hanging baffle gates prevents ambient air from
entering the furnace chamber. A venturi-assisted exhaust stack (eductor) draws gases from the entrance of furnace
zone 1, across a drip tray and out of the furnace to prevent exhaust condensation from falling into the entrance baffle.
Proper operation of this system keeps the furnace interior clean.
Standard on most furnace models.
BNV Belt, Ni-Chrome V. The high temperature belt is a balanced spiral weave of 18 gauge wire wound with 16 gauge
cross wire of Nichrome V, 80%Ni/20%Cr alloy (<1% Fe). Because of the balanced construction, it is 50% stronger
than conventional weave and any belt tendency toward side travel is greatly reduced.
Standard on high temperature
furnaces (>550 C), option available for most furnaces.
BSS Belt, Stainless Steel. The standard furnace conveyor belt is a balanced spiral weave of 18 gauge wire wound with
16 gauge cross wire made of type 316 stainless steel. Because of the balanced construction, it is 50% stronger than
conventional weave and any belt tendency toward side travel is greatly reduced.
Standard on low temperature (<550
C) furnaces.
BX Exit Baffle with Eductor. The Exit Baffle/Exhaust Eductor is a 38.1 cm (15 inch) long section that serves to isolate
the heating chamber from the ambient atmosphere at the furnace exit. The exit baffle is housed inside a metal shell
lined with ceramic fiber insulation and is fully insulated so that it will lose heat gradually. The baffle includes a metal
air rake to introduce a gas curtain above the belt to purge the baffle and a series of four (4) equally spaced hanging
baffle gates to effectively isolate the high temperature furnace section from the ambient atmosphere at the furnace
exit. A venturi-assisted exhaust stack draws furnace gases from the last zone, across a drip tray and out of the
furnace to prevent exhaust condensation from falling into the exit baffle. Proper operation of this system keeps the
furnace interior clean.
Standard on most furnace models.
BXO Exit Baffle. The Exit baffle is a 38.1 cm (15 inch) long section that serves to isolate the closed atmosphere cooling
section from the ambient atmosphere at the furnace exit. The exit baffle is housed inside an aluminum shell lined with
ceramic fiber insulation. The baffle includes a metal air rake to introduce a gas curtain above the belt to purge the
baffle and a series of four equally spaced hanging baffle gates to effectively isolate the controlled atmosphere cooling
section from the ambient atmosphere at the furnace exit.
Standard on some furnace configurations.
CACT Closed Atmosphere Cooling Tunnel. The CACT is a 76.2 cm (30 inch) long, high efficiency heat exchanger that
reduces the temperature of the product. Inside the CACT, process gas flows through air rakes arranged two above
the belt to cool the product to a safe temperature. To expedite heat removal, fans outside the chamber force ambient
room air over the heat sink finned surfaces on the outside of the tunnel. Multiple tunnels may be joined end-to-end to
obtain required cooling.
Standard on many furnace configurations, option available on most furnaces.
CAWC Closed Atmosphere Water Cooled Tunnel. The CAWC is a 76.2 cm (30 inch) long, high efficiency heat exchanger
that reduces the temperature of the product, but without externally mounted heat sink cooling fans. Instead, water
flowing through chambers above and below the tunnel removes heat from the tunnel walls without adding to the heat
load in the clean room. Includes OI integrated outlet water temperature sensors and alarms. Requires water supply
and drain. Multiple tunnels may be joined to obtain required cooling. Upgrade from CACT.
Standard on many
furnace configurations, option available on most furnaces.
CFL Cabinet Fans, Lower. Provides a high air volume impeller fan, located below the belt, to remove excess heat from
the product and cabinet interior. Used with CMB30 and CMB45 Cross-flow Fan Cooling Modules. Standard on all
furnace configurations with CMB30 or CMB45 modules.
CM Turbulent Air Cooling Module. Provides a 76.2 cm (30 inch) long, fan-driven cooling module consisting of two rows
of 3 m
3
/min (106 cfm) fans that force ambient air over all surfaces of the product. This module can be used to bring
massive or high-speed product to handling temperature quickly. Controlled atmosphere processes should be reviewed
to assure that the product is below its oxidation temperature before reaching the air cooling. The fan speed is
controlled via the control console.
Standard on some furnace configurations, option available on most furnaces.