Gemlab F-series Mini Muffle Furnace (Model M50-1700, M50-1800)
Gemlab's M50-1700 ("MINI MUFFLE") vertical muffle furnace is designed by Ted Themelis in response to the market demand for mini-size high temperature reliable furnace. Model M50 is the smallest possible vertical muffle furnace can be engineered which rubies-sapphires can be easily loaded-uloaded. The furnace is able to heat-treat about 1,500 cts of rubies-sapphires at teperatures between 1200oC to 1700oC (or 12000C to 1800oC model M50-1800) under various modes. The furnace is equipped with a alumina 99.96% tube OD=50 mm providing the desirable atmosphere conditions selected by the operator (reducing, oxidizing, or vacuum) with or without using chemical additives or in vacuum. The furnace may be used with/without muffle to increase loading capacity. |
Model M50-1700
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Features & specifications
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Bench-top, only 330 (D) x 330 (W) x 675 (H) mm |
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Gross weight is only 40 kgs |
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Oper temp.: 1200oC-1700oC (air); 1200oC-1500oC (vacuum) |
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Loading capacity: Depending the mode (see chart below) |
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Double steel shell design with dual cooling air fans |
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Full atmosphere control for reducing-oxizing (optional) |
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Vacuum pump with valve and vacuum gauge (optional) |
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Molybdenum desilicide 1800-grade elements. |
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51-step artificial intelligent temperature programmer/controller |
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SCR (Silicon Control Rectifier) |
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Long life Platinum/Rhodium “B” type thermocouple |
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High energy fiber-board 1900-grade lining throughtout |
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Analog voltmeter, ammeter, on-off switch, alarm-buzzer |
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Electric elevator control (UP, DOWN) for slow/rapid unloading |
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Power: 1 KVA, plugs to any 220 Vac 10 A (1 phase) |
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Very low power consumption, only 700 watts needed to maintain operating temp. at 1700oC (model M50) |
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Up gradable for 1800oC operation |
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Safe
and easy operation |
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Long-lasting
performance |
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Delivery 6-8 weeks, FOB Bangkok |
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One
year warranty on all electric, electronic parts |
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Four different modes of loading the crucible to heat-treat your gems (Model M50) |
OPTION A.
WITHOUT MUFFLE |
OPTION B.
WITH FULL MUFFLE
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OPTION C.
WITH HALF-MUFFLE
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OPTION D.
WITH HALF-MUFFLE
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Top or bottom loading |
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Slow cooling |
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With/without additives |
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air |
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No vacuum |
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Load: One cylindrical straight crucible
(OD=50 mm, H=95 mm) |
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Top or bottom loading |
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Slow or rapid cooling |
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With/without additives |
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Oxidizing, reducing,air |
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Vacuum operation |
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Load: One cylindrical straight crucible
(OD=40 mm, H=95 mm |
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Top loading |
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Slow cooling |
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With/without additives |
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Oxidizing, reducing, air |
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Vacuum operation |
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Load: One cylindrical straight crucible
(OD=40 mm, H=95 mm) |
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Bottom loading |
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Slow or rapid cooling |
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With/without additives |
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Oxidizing, reducing,air |
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Vacuum operation |
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Load: One cylindrical straight crucible
(OD=40), H=95 mm) |
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Standard items (Model M50-1700 |
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Optional items (Model M50-1700) |
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CAT# V. Vacuum package: pump (3.6 m3/h, 5 Pa, 150 W), vacuum gauge, fittings and vacuum hose to be used with the half muffle tube.
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1800-grade MoSi2 heating elements |
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CAT# W. Water re-circulating system. It is required for half or full-muffle heating processes over 1500oC. Includes built-in pump, motor 220Vac-3 A, 2.4 gallon tank hoses, ready to be installed into the muffle flange.
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B-type thermocouple |
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Two sets of flange covers: One set sealing hermetically the muffle ceramic tube at the top; and one set at bottom. For half muffle tube one set is required. |
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CAT# A.Atmosphere control module. Includes: two 65 mm flow flow-tubes for purging directly into the muffle oxygen, nitrogen or mixture of forming gas (8% hydrogen-balance nitrogen) or in any oxygen/nitrogen mixture in fully controllable atmosphere conditions to max.1700oC. It can be used with half-muffle or full muffle tube. |
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Crucible, disk, plugs, other ceramics |
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Muffle ceramic tube: One half (OD=50 mm, L=305 mm and one full (OD=50 mm, L=610m) |
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UPGRADING TO 1800oC (MODEL M50-1800)
Gemlab's furnace Model M50-1700 has been designed and engineered to be easily converted for 1800oC furnace temperature operation upon reconfiguration of the following:
1) Change to 1900-grade Kanthal heating elements
2) Change B-type to 20/40-type thermocouple
3) Change parameters in the existing temp.controller
Al other parts (insulation, etc) remained unchanged |
Standard package (Model M40-1800)
Order: Model M40-1800 as per above specs for model M40-1700 but supplied with 1900-grade elements, one 20/40 type and one B-type thermocouple, one pc half (L=305mm and one pcs full (L=610m) muffle tube; pair of muffle flange-set, crucible, re-circulating water cooling system; full atmosphere control.
Delivery: FOB Bangkok Thailand, 6-8 weeks |
Comparison features between all Gemlab models, setting up heat-treatment facility and consumable required
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