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General Instrument products are made with fine precision, latest automation, and by qualified professionals. They are tested and certified as per industry standards' organizations. Our products are pre-approved on most large company procurements world-wide.

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Vanstone Type Thermowell


For high-pressure applications and where welding is to be avoided, Van Stone design thermowells are used. These are machined from a single bar stock, sandwiched between the nozzle flange and cover (companion) flange. The OD of the machined portion corresponding the raised face portion of the flange. Wake frequency calculations (in accordance with PTC 19.3) are performed where ever data is made available and are essential in order to suggest appropriate dimensions of thermowell 


Excellent Durability High Strength Standing High Pressure Standing High Tempreature Availibility In Different Material 


In-House Test Facilities for Thermowell 

•  Dimensional

•  Hydro Test

•  Bore Concentricity

•  Dye Penetration Test

•  Threading Check

•  PMI Test

•  WFC


Optional Test

•  Hardness Test

•  PWHT-Post weld heat treatment

•  Intra Granular Corrosion Test

•  Corrosion Test as per A293 Method C

•  Ferrite No. Test

•  Impact Test

•  Radiography for bore concentricity & weld joint as applicable

•  Physical, Chemical& Microanalysis as applicable

•  PMI Test

•  IBR Test 


Consultants, Instruments Manufacturers, Original Equipment Manufacturers, Cement, Pharmaceutical, Oil Exploration/Refineries/Petrochemicals Chemical Fertilizer Pulp & Paper Power Generation Metallurgy Synthetic Fiber 



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