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EMCO Thermowell type VSA for sandwitch mounting between flanges

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.

Images & drawings

AISI 316, 22Cr Duplex, 25Cr Duplex, Monel, 6Mo, Titanium, Hastelloy, and other exotic materials on request
Between ANSI/ASME flanges
1", 1 1/2", 2"
Pressure rating
150 lbs - 2500 lbs
Flange facing
RF with stock or smooth finish or RTJ
7, 10 mm (0.276", 0.394")
Well form
Straight, stepped straight, taper
Tip thickness
6.4 mm (0.25")
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)