Texas Thermowell - Precision Fitting & Gauge > …

1 Texas ThermowellThermowells, Protection Tubes, Sample Probes, Flange ConnectorsCatalog 4240 October 2009iiParker Hannifin CorporationInstrumentation Products DivisionBeaumont, TX 4240 Introduction Copyright 2009 Parker Hannifin Corporation. All Rights are recommended for temperature instruments in process systems where pressure, velocity, or viscous, abrasive, and corrosive materials are present individually or in combination. A properly selected Thermowell will protect the temperature instrument from damage result-ing from these process variables. Additionally, a Thermowell enables removal of the temperature instrument for replacement, repair, or testing without affecting the process Texas Thermowell specializes in the design and manufacture of all types of thermowells. The 21 Series Thermowell designs shown in this guide are styles that are popular throughout industry. Special designs, as well as modifications of our standard offerings, are also Texas Thermowell is dedicated to unsur-passed quality, on-time delivery, and competitive pricing.

2 This commitment has been recognized by the International Standards Organization (ISO). Our ISO 9001:2008 certification is additional assurance to our customers that their buying decisions can be made every day with a higher level of supplier confidence, and affirms our ongoing commitment to our quality policy Parker Texas Thermowell will deliver products, services and information that meet or exceed customer requirements and expectations every time. This product guide is intended to provide technical data to deal with most applications. For severe applications not adequately covered here, please contact the factory for of Contents21 Series Thermowells ..122 Series Protection Tubes ..1123 Series Sample Probes ..15FC Series Flange to Compression Connectors ..18 Offer of Sale ..19 Offer of SaleThe items described in this document are hereby offered for sale by Parker-Hannifin Corporation, its subsidiaries or its authorized distributors.

3 This offer and its acceptance are governed by the provisions stated in the detailed Offer of Sale elsewhere in this document or available at USER RESPONSIBILITYFAILURE OR IMPROPER SELECTION OR IMPROPER USE OF THE PRODUCTS DESCRIBED HEREIN OR RELATED ITEMS CAN CAUSE DEATH, PERSONAL INJURY AND PROPERTY document and other information from Parker-Hannifin Corporation, its subsidiaries and authorized distributors provide product or system options for further investigation by users having technical expertise. The user, through its own analysis and testing, is solely responsible for making the final selection of the system and components and assuring that all performance, endurance, maintenance, safety and warning requirements of the application are met. The user must analyze all aspects of the application, follow applicable industry standards, and follow the information concerning the product in the current product catalog and in any other materials provided from Parker or its subsidiaries or authorized the extent that Parker or its subsidiaries or authorized distributors provide component or system options based upon data or specifications provided by the user, the user is responsible for determining that such data and specifications are suitable and sufficient for all applications and reasonably foreseeable uses of the components or Hannifin CorporationInstrumentation Products DivisionBeaumont, TX 424021 Series Thermowells21 Series ThermowellsSpecificationsMaterialsParker Texas Thermowell thermowells are available in virtually any material to fit your application.

4 Contact the factory regarding availability of materials not listed in the Ordering Information guide on pages 4 and strength of a Thermowell depends on several parameters that relate Thermowell construction to the installation environment. For most industrial applications, standard Parker Texas Thermowell thermowells provide the necessary strength if the material, style, and length are correctly specified for the application parameters: fluid type, temper-ature, pressure, and fluid velocity. It is important to note that most Thermowell failures are caused by vibration that is induced by fluid addition to providing this selection guide, Parker Texas Thermowell offers assistance in correctly selecting thermowells, given the application parameters. This service is available for a nominal charge. Contact the factory for more 21 Series Thermowell bodies are machined from bar stock. Flange mounts are welded to the Thermowell body.

5 The serial number and material are etched on each Thermowell . Additional tagging for specific customer requirements is StandardsBar StockMill Standard + " to -1/32"Shank " U Dimension "Overall Length "Tip Thickness1/4" " (unless otherwise specified)Shank Surface FinishPolished to 16 RMSBore "2 Parker Hannifin CorporationInstrumentation Products DivisionBeaumont, TX 424021 Series ThermowellsThermowell TerminologyProcess Connection: External means to connect Thermowell to process system. Wells can be threaded, bolted (to matching flange), clamped, or welded in Connection: Internal threads to con-nect temperature instrument to Thermowell . U Dimension: Length of Thermowell immersed into process system. Measured from the base of the process connection to the end tip of the well. T Dimension: Also called lag length or lagging extension. Extends length between the instrument and process connections to accommodate vessel or piping insulation.

6 A Dimension: Instrument insertion length into Thermowell . Equal to bore length. D Dimension: Also called tip diameter. Diameter of Thermowell shank at the end tip of the Thermowell . This dimension may vary with process connection, shank design, or bore diameter. Q Dimension: Also called root diameter. Diameter of Thermowell shank below the process connection. This dimension may vary with process connection, shank design, or bore Diameter: Dimension of internal bore to match the diameter of the instrument inserted into the Thermowell . Stepped Shank: Also called reduced tip. The shank is reduced over the last 2-1/2" of the U dimension from the standard root diameter to 1/2" Straight Shank: Shank is the same from the root diameter ( Q dimension) to the tip diameter ( D dimension). The straight shank is generally used with a " or larger bore diameter, but is also available with a " Shank: Shank is gradually reduced from the root diameter ( Q dimension) to the tip diameter ( D dimension).

7 The tapered shank is recommended for heavy duty applications characterized by high vibration, pressure, temperature, and/or ConsiderationsImmersion Length ( U Dimension)For best temperature measurement accuracy, the U dimension should be long enough to permit the entire temperature-sensitive part of the measur-ing instrument to project into the medium being temperature measurement: A properly designed Thermowell will extend into the fluid an amount equal to the length of the temperature-sensitive zone plus one inch or temperature measurement: A properly designed Thermowell will extend into the fluid an amount equal to the length of the temperature-sensitive zone plus three inches or temperature-sensitive zone for thermo- couples and thermistors is short (right at the tip of the device), enabling measurement accuracy with limited immersion into the process thermometers, resistance temperature detectors (RTDs), and liquid-in-glass thermome-ters have bulbs with temperature-sensitive zones between one and two inches thermometer bulbs may have temperature-sensitive zones from one to several inches in DiameterWhile Parker Texas Thermowell offers thermo-wells with bore diameters up to ", the most common are as " bore: Bi-metal Thermometers (1/4" stem) Thermocouples (1/4" sheath) RTDs (1/4" sheath) Liquid-in-glass Test Thermometers (unarmored) Other elements having " maximum " bore.

8 Bi-metal Thermometers (3/8" stem) Thermocouples (8 and 14 gage) Liquid-in-glass Test Thermometers (armored) Other elements having " maximum diameter3 Parker Hannifin CorporationInstrumentation Products DivisionBeaumont, TX 424021 Series ThermowellsShank StyleTapered shank wells provide greater stiffness for the same sensitivity. The higher strength to weight ratio gives these wells higher natural frequency than for equivalent straight shank wells, thus per-mitting operation at higher fluid RatingsIn most cases, Thermowell failures are not due to the effects of pressure and temperature. The calculations necessary to provide adequate strength under given conditions are familiar enough to permit proper choice of wall thickness and familiar are the vibrational effects to which thermowells are subjected. Fluid flowing past the well forms a turbulent wake (the Von Karman Trail), which has a definite frequency based on the diameter of the well and the velocity of the fluid.

9 The Thermowell must have sufficient stiffness so that the wake frequency will never equal the natural frequency of the Thermowell itself. If the natural frequency of the well were to coincide with the wake frequency, the well would vibrate to destruction and break 1 provides recommended maximum velocity ratings for common well length and material com-binations. To reduce the complexity of present-ing this information, the ratings given are based on operating temperatures of 1000 F for carbon steel, 304 SST, and 316 SST wells. Ratings for brass wells are based on 350 F service. Ratings for Monel wells are based on 900 F service. Slightly higher velocity is possible at lower velocity ratings provided are extremely conservative and intended primarily as a guide. Wells are safe from vibrational destruction if the resonant frequency is well below the wake frequency, or if the fluid velocity is constantly fluctuating through the critical velocity point.

10 Nevertheless, if the installation is not hampered by a sufficiently stiff well, it is recommended that the values given not be 1. Maximum Fluid Velocity Ratings (ft/sec)Shank StyleRoot FluidImmersion Length U Dimension Q "4-1/2"7-1/2"10-1/2"13-1/2"16-1/2"19-1/2 "22-1/2"Stepped3/4" , 316 " , 316 , 316 , 316 Hannifin CorporationInstrumentation Products DivisionBeaumont, TX 424021 Series ThermowellsOrdering InformationExample Model Number: 21A105F43A30 ACC-D MaterialCode304 SSA310 SSC316 SSD347 SSE321 SSFA lloy 20 GCS-1018 HCS-A105 IHastelloy CJHastelloy BKAlloy 800 LInconel 600MF-5NF-9 OMonel 400PF-91QF-11RF-22 SNickel 200 TDuplex 2205U446 SSVT itaniumWBrassYAluminumZOther (please specify)X Material A Series 21 Mounting StyleF43105 Immersion Length ( U Dim.)(Continued on the following page)Mount StyleStyleCodeThreadedTFlangedFRing JointRSocket WeldKWeld-inWVan StoneVSanitarySFlat FaceNProcess ConnectionConnectionCodeThreaded Only1/2" NPT13/4" NPT21" NPT31-1/4" NPT41-1/2" NPT5 Flanged Only1" Class 15011-1/2" Class 15022" Class 15031" Class 30041-1/2" Class 30052" Class 30061" Class 60071-1/2" Class 60082" Class 60091" Class 900/1500A1-1/2" Class 900/1500B2" Class 900/1500C1" Class 2500D1-1/2" Class 2500E2" Class 2500 FSocket Weld & Weld-in3/4" pipe ( )11" pipe ( )21-1/4" pipe ( )31-1/2" pipe ( )41-1/2" Actual ( )5 Van Stone Only1"11-1/2"22"3 Sanitary Only1-1/2" Tri-Clamp12" Tri-Clamp22-1/2" Tri-Clamp33" Tri-Clamp4 Other(please specify)XShank StyleStyleCodeStepped2 Straight3 Tapered4 Length ( U ) (in inches) Hannifin CorporationInstrumentation Products DivisionBeaumont, TX 424021 Series Thermowells Bore " " " " " "FOther (please specify)XLag (in inches)