Hardening and High Temperature F urnaces Model AY Furnaces Model AHS Heat Treating Furnaces Model MP Hardening Furnaces

Model AY Furnaces

Model AY furnaces feature the Diamond Block Atmosphere for simplified protection of tool steels during hardening and are designed for exceptional temperature uniformity and performance. Rugged industrial construction assures long life and low maintenance.

Features:

Furnace can accommodate simplified and effective atmosphere control with the Diamond Block atmosphere.

Work chamber formed by a full high heat conducting muffle. The muffle eliminates direct radiation from heating elements and dampens temperature fluctuations to provide unified temperature in the work area.

Heating elements are located above and below the work chamber and are spaced to control heat distribution.

Recessed door construction eliminates cold throat condition and increases the usable work area.

6 AY door, made of cast iron and refractories, is fully recessed into the furnace. Hand actuated lever operates pneumatic lift assembly. All AY doors can be elevated to any variable height setting.

Furnaces designed for fast heating. Heavily insulated for continuous operation up to 2500 Degrees F. Plus low heat storage insulation...ideal for intermittent use.

Sentry AY Furnace Operating Characteristics & Specifications
(all sizes 240 or 480 volts, 60 Hertz, 3 phase )

Size & Model		2AY	3AY	4AY	5AY	6AY
Work Chamber (Fully Useable)	Wide	4 1/2"	9"	6 1/8"	9"	12"
	High	4"	4"	6 1/8"	7"	8"
	Deep	11"	16"	13 3/4"	20"	25"
Sentry Diamond Block Sizes		1-4	11-14	6-10	11-17	18-20
Sentry Block Maximum Tool Size Capacity (in inches)		2 3/4"x3"x8"	2 1/2"x7"x12"	4 1/2"x4 3/4"x9"	5"x7"x14"	5"x8 1/2"x17"
Max. Operating Temperature		All sizes to 2500° F
Power Supply		All Sizes-220 Volts, 60 Hertz, 3 Phase
Rating (KW)		14.5	24	20	33	43
Avg. Power Used (KW)		3-7	5-12	4-10	6-14	16-27

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Model AHS Heat Treating Furnaces

Sentry Model AHS Electric Furnaces were designed for Industrial Heat Treating applications up to 2500°F, feature heavy industrial construction and have the ability to handle heavy loads.

Features:

Heavy steel furnace shell lined with high quality insulation, special formed refractories and silicon carbide shapes to give economy of operation, minimum maintenance and long life

Silicon carbide heating elements located above and below the work chamber are spaced for best temperature uniformity; Elements are arranged in 3 circuits for balanced connection to a 220 Volt, 3 Phase power supply without transformers

With new heating elements, each furnace will heat to 2200°F in approximately 90 minutes

Door located inside furnace shell eliminates cold throat and provides front insulation thickness nearly equal to side walls. Grooves are provided to seal the door on four sides when closed

Supplied with two silicon carbide hearths which can be arranged to form a semimuffle with a small loss in height; Advantage is improved temperature uniformity with elimination of direct heating element radiation on the work load

Standard equipment includes a pneumatic door lift assembly with foot actuated pedal for operator convenience

Insulated for continuous operation at 2500°F; Special models available for 2750°F or with longer chambers

Standard and special control systems are available on request. Furnaces are normally supplied with all controls mounted and wired and ready for connection to customer's supply.

Model AHS Specifications

Size & Model					4 "AHS"
Work Chamber Dimensions	Width				17 3/4"
	Depth				27"
	Height				10"
	Semi-Muffle Height				8"
Max. Operating Temp.					2500°F
Electrical Rating - KW					53
Normal Operating Consumption - KW					13-24
Number of Heating Elements					9
Power Supply: Both Sizes - 220 Volts, 60 Hertz, 3 Phase
Air Pressure Required for Door Mechanism					80 p.s.i.
Dimensions (Including Door Lift Mechanism)					-
Width					52"
Height					81"
Depth					56"
Hearth Height					36"
Approx. Weight (With Controls)					3840 lbs.

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Model MP Hardening and Tempering Furnaces

The Model MP Multipurpose furnace is an economical option for general purpose heat treating applications. It has an optional stainless steel muffle for controlled atmosphere heat treating. If desired, it can be mounted on a model HT furnace for a dual design.

Features:

1 1/2" thick hearth handles heavy loads

Recessed door for improved temperature uniformity.

MP-2000 has Silicon Carbide heating elements for fast heating.

Safety switch cuts furnace power when door is opened.

Optional Stainless Steel Muffle provides for heat treating in a protective atmosphere.
Features Include:
    - Direct stainless steel pipe access to muffle through rear of furnace.
    - Rear mounted system provides positive pressure of the muffle
       to the furnace door gasket, minimizing atmosphere loss.
    - Internal baffle system spreads atmosphere while purging.
       Removable supports elevate work.
    - Door mounted vent release valve allows quick effective purging of atmosphere.
       Also used to make temperature measurements.

Furnace available separately or can be mounted on Model HT Tempering Furnace for Dual Design.

Sentry Model MP Furnace Operating Characteristics & Specifications

Furnace Model		MP-2000	MP-1250
Max. Temperature		2000° F	1250° F
Chamber Without Muffle	Wide	12"	14"
	High	9 1/2"	10 1/2"
	Deep	22 3/4"	18"
Max. Piece Size		12" x 9" x 18"	8 1/2" x 10" x 17"
Muffle Chamber Size	Wide	8 3/4"	8 3/4"
	High	8 1/4"	8"
	Deep	24 3/4"	17"
Max. Piece Size		8 1/2" x 7" x 16"	8" x 6" x 15"
Power Supply		240 Volts, 3 Phase 18.5 KW, 49 Amps	240 Volts, 1 Phase 12 KW, 49 Amps
Overall Furnace Size	Wide	39"	30"
	High	64"	59"
	Deep	41"	28"
Weight		1100 lbs.	750 lbs.

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