A photograph of a 20381 insulating top for series m, tm or stm heating mantles.

Insulating Top for Series M, TM or STM Heating Mantles

Item #: 20381

* Size:

Quantity:

$245.00

Normal Availability: 4-5 business days

Product Description

This unpowered insulating mantle top helps prevent vapor condensation in the upper half of a flask during distillation of high-boiling materials. The tops are designed for use with Series M, TM, or STM mantles. They protect the flask, the solutions, and the laboratory from:

Stray drafts, which would disturb the reflux ratio during fractionation;
Flying glass during flask implosions in high-vacuum distillations;
Falling objects;
Thermal strain between top and lower half of flask during high-temperature operations.

With a glass-fabric construction and laced-side opening, the elliptical hole accommodates 1-, 2-, and 3-neck flasks. Also available as a 115 or 230V heating top (pictured here). Custom tops are available by special order.

Flask Capacity (mL)	Flask Diameter (mm)	Heating Top Wattage	Outside Diameter (in)	Product Weight (lb)
250	83	140	4.77	0.6
300	86	140	4.89	0.6
500	101	140	5.48	0.6
1,000	130	140	7.12	0.6
2,000	170	200	8.70	1.0
3,000	183	200	9.20	1.8
5,000	220	300	10.66	2.8
12,000	293	590	14.53	4.4
22,000	347	650	16.66	6.8
50,000	456	1,000	20.95	10.8
72,000	522	1,000	23.35	11.8