Principle: EMCO thermowell type VSA, known as Van Stone type, is used for mechanical and corrosive protection of temperature sensing instruments such as bimetal thermometers, thermocouples, and RTD’s with a maximum outer diameter of 6.4 and 9.5 mm (1/4″and 3/8″).
The thermowell is sandwiched between a loose lap joint flange and the flanged nozzle (boss)
on the process equipment.
Material
|
AISI 316, 22Cr Duplex, 25Cr Duplex, Monel, 6Mo, Titanium, Hastelloy, and other exotic materials on request
|
Connection
|
Between ANSI/ASME flanges
|
Size
|
1", 1 1/2", 2"
|
Pressure rating
|
150 lbs - 2500 lbs
|
Flange facing
|
RF with stock or smooth finish or RTJ
|
Bore
|
7, 10 mm (0.276", 0.394")
|
Well form
|
Straight, stepped straight, taper
|
Tip thickness
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6.4 mm (0.25")
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Instrument connection
|
½" NPSM. This thread accepts both NPT and NPS external threads
|
Plug and chain
|
Lap joint flange.
|
Pt 100 and thermocouple temperature sensors
|
Surface treatment possible (PTFE)
|
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