prodSingleMainImgPlchldr Uni-DRAW® Batch Tempering Furnaces, companion furnace to the Allcase® Batch Integral Quench Furnace, designed for pre-heating and tempering

Uni-DRAW® Batch Tempering Furnaces

Uni-DRAW® Batch Tempering Furnaces, companion furnace to the Allcase® Batch Integral Quench Furnace, designed for pre-heating and tempering
Uni-Draw® Batch Tempering Furnace is made for pre-heating and tempering. Round design leads to a circular wind flow pattern
Uni-Draw® Batch Tempering Furnace is made for pre-heating and tempering. Round design leads to a circular wind flow pattern
Uni-Draw® Batch Tempering Furnace
Uni-Draw® Batch Tempering Furnace has a wind flow circular pattern gives great wind distribution. Made for pre-heating, tempering

The Uni-DRAW® batch tempering furnace is a companion furnace to the Allcase® Batch Integral Quench Furnace. Designed for pre-heating and tempering, the Uni-DRAW can also be used as a stand-alone heat-treating system. The unique round design results in an efficient circular wind flow along the inside of the furnace wall and is covered by the U.S Patent No. 4,963,091.

Uni-DRAW® Batch Tempering Furnaces - Product Description

The patented circular wind flow pattern of the Uni-DRAW® provides excellent wind distribution throughout the effective work zone without the need for movable baffles. Wind from the rear-mounted high capacity recirculating fan moves out along the walls to the front of the furnace. The wind then travels back through the work zone to the fan inlet. Fast heating and excellent uniformity of +/-10°F during the soak period results.

Built to Surface’s exacting standards of ruggedness and reliability, the Uni-DRAW is designed for decades of useful life with minimal maintenance and adjustment. The furnace casing is manufactured with gas-tight welded heavy steel plate supported by structural steel shapes. The insulation package is balanced to be energy efficient, allow rapid temperature changes and ease of maintenance. Surface’s proprietary soft-seal door design also helps promote rapid heating, low heat losses and excellent temperature uniformity. The furnace may be loaded with simply a fork truck or an advanced automated charging system. Multiple furnace hearth designs are available to support light or heavy workloads and enable automation. Work zone sizes and hearth capacities are the same as the Allcase batch integral quench furnace.

Standard Uni-DRAW furnaces are available with maximum temperatures of 900 and 1400°F. Surface offers four different heating systems for the Uni-DRAW. Electric elements, gas-fired radiant tubes or Surface’s proprietary Ported TubeTM direct-fired burner system are rear wall mounted and spaced around the load envelope for even heating. Our base model offers an economical side mounted tangentially fired package burner system.

Nitrogen Uni-DRAW

Nitrogen atmosphere may be added to electrically heated and radiant tube models to reduce oxidation and work discoloration. Purge and process nitrogen flow may be automatically set in the furnace controller. Each Nitrogen Uni-DRAW has an external cooling package to rapidly reduce load temperature to a prevent discoloration when the door opens and air enters the furnace at the end of the cycle. Radiant tube furnaces have the added benefit of plunge cooling to add to the cooling rate of the furnace.

The Nitrogen Uni-DRAW uses the same patented windflow as the Uni-DRAW. It also comes in the same standard sizes, load capacities and temperature ratings as the Uni-DRAW.

P/M Uni-DRAW

The P/M Uni-DRAW is designed specifically to temper or draw powder metal parts after oil quenching.  Due to the porosity of the powder metal parts, oil is retained from quenching. This oil is released in the form of smoke during the temper cycle. The P/M Uni-DRAW is designed to capture and remove much of the smoke generated.

The furnace is direct-fired. Smoke from the burners and the parts is released through a stack opening at the top of the furnace through customer provided ductwork to an electrostatic precipitator specifically designed and sized for the furnace. The electrostatic precipitator’s controls are integrated and interlocked with the furnace control system. Within the electrostatic precipitator, smoke is converted to oil for collection and disposal, reducing the visible effluent from the stack.

The furnace design uses a unique “inside/out” construction, consisting of an internal steel casing with external fiber insulation and a light gauge sheet metal covering. This design provides rugged construction and protects the insulation from oil impregnation and contamination. The internal steel casing may be easily cleaned of any residual oils.

The P/M Uni-DRAW uses the same patented windflow as the Uni-DRAW. It also comes in the same standard sizes and load capacities of the Uni-DRAW. Maximum temperature rating for the P/M Uni-DRAW is 800°F and temperature uniformity is +/-10°F during the soak

A Uni-DRAW can be designed to stand alone or be part of a new or existing furnace line. Surface provides a wide range of companion equipment, advanced controls and support services for single source responsibility. This allows you piece of mind that your installation will run smoothly, and your equipment will be taken care of for the long term.

Standard Sizes

Width24″30″36″36″42″
Length36″48″48″72″72″
Height24″30″36″36″42″

Electric, direct gas fired, Ported TubeTM, and radiant tube heating systems available

Ceramic fiber or mineral wool insulation for low heat storage and heat loss

Surface’s proprietary soft seal door design reduces heat losses

Stationary or roller rail hearth systems for loading with a forklift type loader or a charge car

Rear wall mounted high capacity recirculation fan

Nitrogen atmosphere available with electric and radiant tube heating systems

External cooling systems available to reduce cycle time

Designed as a companion temper/draw furnace to the Allcase® Batch Integral Quench Furnace

Design can be automated

Aerospace Components

Aluminum

Cast Iron

Casting

Chain

Copper

Fasteners

Forgings

Gears

Hand Tools

Pinions

Powdered Metal

Rock Bits

Shaft Bearings

Stainless Steels

Steel

Partial material and component list shown. Looking for something specfic Contact Us.

Washers and Dunk Tanks

Loading Cars

Material Handling Solutions

Gas Generators

Loading System

Load/Unload Tables

Charge Car

Air Cool Station

Partial companion equipment list shown. Looking for something specfic Contact Us.

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  • furnace cyclecycle
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Please call us when you are ready to do discuss a new furnace, maintain, upgrade or replace your furnace or any part of your furnace. At Surface, we look forward to helping you with any thermal processing needs.

For Parts and Service have one or more of the following details regarding your furnace if possible:

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(800) 537-8980