Heavy Duty Threaded Thermowell for 3/8 Inch Diameter Elements

SERIES 385HL

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Available in Carbon Steel and Stainless Steel
Standard Insertion Lengths from 2 1/2 to 19 1/2 Inches
1 Inch External Diameter

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Descrição

Application:
Standard length, 3/8" stem, bimetal thermometers. #14 gage thermocouple elements. Armored liquid-in-glass test thermometers. Other temperature-sensing elements having .377 in. maximum diameter.

Connection Size:
1" NPT is standard. Other thread sizes are available upon request.

Materials:
Brass (ASTM B-16), Carbon Steel (C-1018), Stainless Steel A.I.S.I. 304 & A.I.S.I. 316, Monel. Wells are also available in special materials; prices on request.

Series 385HL—Lagging Extension Type External Thread “P”– 1" NPT
All dimensions in inches.

* NPSM internal pipe thread will accept both NPT and NPS male threads.

External Thread P	Model No.	Lag. Ext. T	Elem. Lgth. A	Insert. Lgth. U	Shank Dia. Q
1" NPT	1-385HL-U 2 1/2 -U 4 1/2 -U 7 1/2 -U10 1/2 -U13 1/2 -U19 1/2	2 3 3 3 3 3	6 9 12 15 18 24	2 1/2 4 1/2 7 1/2 10 1/2 13 1/2 19 1/2	1 1/16 1 1/16 1 1/16 1 1/16 1 1/16 1 1/16

Maximum Fluid Velocity—feet per second

Well Type	Material	Insertion Length – “U”
Well Type	Material	2 1/2	4 1/2	7 1/2	10 1/2	13 1/2	16 1/2	19 1/2	22 1/2
1" - 385H and 1" - 385HL	Brass	321 (150)	129 (83.5)	46.8	23.6	14.5	9.6	6.9	5.1
	Carbon Steel	410 (270)	249 (150)	90.3	45.6	27.8	18.5	13.2	9.8
	A.I.S.I. 304 & 316	483 (350)	272 (208)	97.3	49.7	30.4	20.3	14.5	10.7
	Monel	396 (300)	214 (167)	77.5	39.2	23.8	16	10.3	7.7

Where single values appear in the velocity tables, these may be considered safe for water, steam, air or gas. In the shorter insertion lengths, consideration is given to the velocity pressure effect of water flowing at higher velocities. The values in parentheses, therefore, represent safe values for water flow, while the unbracketed values may be used for steam, air, gas and similar density fluids.
See 385H Thermowell Page for Pressure-Temperature Ratings