1、 FCI 70-1-1993(R1999) FLUID CONTROLS INSTITUTE STANDARD STANDARD TERMINOLOGY AND DEFINITION FOR FILLED THERMAL SYSTEMS FOR REMOTE SENSING TEMPERATURE REGULATORS Fluid Controls Institute, Inc. Sponsor: Fluid Controls Institute, Inc. 1300 Sumner Ave Cleveland, Ohio 44115-2851 FCI 70-1-1993(R1999) FLUI
2、D CONTROLS INSTITUTE STANDARD Standard Terminology and Definition for Filled Thermal Systems of Remote Sensing Temperature Regulators Sponsor Fluid Controls Institute, Inc. iiFluid Controls InstituteThe Fluid Controls Institute is a non-profit trade association of manufacturers of fluid control and
3、conditioning equipment. The FCI is dedicated to the technical advancement of the industry that it serves. The members of the institute have developed standards to help users/purchasers understand and specify correctly Fluid Controls Institute scope products. FCI standards are voluntary standards, an
4、d their existence does not in any respect preclude anyone, whether he has approved the standard or not, from manufacturing, marketing, purchasing or using products, processes, or procedures not conforming to the standards. Fluid Controls Institute standards are subject to periodic review and users a
5、re cautioned to obtain the latest editions. CAUTION NOTICE: This Fluid Controls Institute standard may be revised or withdrawn at any time. The procedures of the Fluid Controls Institute require that action be taken to reaffirm, revise, or withdraw this standard no later than five years from the dat
6、e of publication. Purchasers of FCI standards may receive current information on all standards by calling or writing the Fluid Controls Institute. Sponsored and published by: FLUID CONTROLS INSTITUTE, INC. 1300 Sumner Avenue Cleveland, OH 44115-2851 Phn: 216/241-7333 Fax: 216/241-0105 E-Mail: fciflu
7、idcontrolsinstitute.org URL: www.fluidcontrolsinstitute.org Copyright 1999, 1993 by Fluid Controls Institute, Inc. All Rights Reserved No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher. Sug
8、gestions for improvement of this standard will be welcome. They should be sent to the Fluid Controls Institute, Inc. Printed in the United States of America iiiCONTENTS PAGE Foreword v 1. Scope and Purpose 1 2. Terminology and Definitions . 1-2 3. References and Acknowledgment . 2 FIGURES Figure 1 -
9、 Filled Thermal Systems for Remote Sensing Temperature Regulator 3 Figure 2 - Vapor Pressure Thermal System Class IIA .4 Figure 3 - Vapor Pressure Thermal System Class IIB .5 Figure 4 - Vapor Pressure Thermal System Class IIC.6 Figure 5 - Plain Bulb 7 Figure 6 - Union Connected 7 Figure 7 - Sensitiv
10、e, Immersion and Insertion Lengths .8 Figure 8 - Union Connected Bulb Assembly and Bulb and Well Assembly with Lagging Extension 8 ivForeword (The foreword is included for information only and is not part of FCI 70-1-1993(R1999), Standard Terminology and Definition for Filled Thermal Systems of Remo
11、te Sensing Temperature Regulators.) The following voluntary standard has been formulated by the Regulator Section of the Fluid Controls Institute, Inc. to assist and guide the manufacturers, specifiers and users of filled thermal systems of remote sensing temperature regulators. FCI recognizes the n
12、eed to periodically review and update this standard. Suggestions for improvement should be forwarded to the Fluid Controls Institute, Inc., 1300 Sumner Avenue, Cleveland, Ohio, 44115-2851. All constructive suggestions for expansion and revision of this standard are welcome. The existence of a Fluid
13、Controls Institute (FCI) standard does not in any respect preclude any member or non-member from manufacturing or selling products not conforming to this standard nor is the FCI responsible for its use. vFCI 70-1-1993(R1999) FLUID CONTROLS INSTITUTE STANDARD Standard Terminology and Definition for F
14、illed Thermal Systems of Remote Sensing Temperature Regulators 1. SCOPE AND PURPOSE 1.1 This standard applies to filled thermal systems of remote sensing temperature regulators. 1.2 The purpose of this standard is to establish uniform terminology and definition for filled thermal systems of remote s
15、ensing temperature regulators. 2. TERMINOLOGY AND DEFINITIONS 2.1 Filled Thermal Systems for Remote Sensing Temperature Regulators: A filled thermal system for remote sensing temperature regulators is a closed system containing a fluid fill (the temperature sensing medium) and comprising a bulb, an
16、expansion device (bellows, diaphragm, capsule, etc.) and a capillary tube operatively connecting the two (See Fig. 1). The following classes of thermal systems are in general use. 2.1.1 Liquid Filled Thermal Systems: A liquid filled thermal system (Class I) is a thermal system completely filled with
17、 a liquid and operating on the principle of liquid expansion. 2.1.2 Vapor Pressure Thermal System: A vapor pressure thermal system (Class II) is a thermal system partially filled with a volatile liquid and operating on the principle of vapor pressure. Three types are employed. a. Designed to operate
18、 with the measured temperature ABOVE the temperature of the rest of the thermal system (Class II A) (See Fig. 2). b. Designed to operate with the measured temperature BELOW the temperature of the rest of the thermal system (Class II B) (See Fig. 3). c. Designed to operate with the measured temperatu
19、re above and below the temperature of the rest of the thermal system (Class II C). This type normally requires a larger sensitive portion than Class II A or II B (See Fig. 4). 2.2 Bulb: A bulb is the sensing means of a thermal system comprising a sensitive portion and quite often a connector. Two co
20、mmonly used types are the plain bulb and the union connected bulb. 2.2.1 Bulb Diameter: The bulb diameter is the outside diameter of the sensitive portion. (See Figs. 5 and 6). 2.2.2 Bulb Length: The bulb length of a plain bulb is the overall length. The bulb length of a union connected bulb is the
21、length from the free end of the bulb to the underside of the seating part. (See Figs. 5 and 6). 2.2.3 Bulb Sensitive Portion: The bulb portion is that portion of the bulb enclosing the fluid fill intended to sense temperature (See Fig. 7). 2.2.4 Bulb Immersion Length - The bulb immersion length is t
22、he length from the free end of the bulb to the point of immersion in the medium, the temperature of which is being sensed (See Fig. 7). The bulb immersion length must equal or exceed the bulb sensitive portion. 2.2.5 Bulb Insertion Length - The insertion length is the length from the free end of the
23、 bulb to, but not including, the external threads or other means of attachment to a vessel (see Figs. 7 and 8). 2.2.6 Bulb Extension - An extension is that portion of a bulb which extends between the sensitive portion and the connector. This extension length is usually defined and will vary with the
24、 application (See Fig. 7). 2.2.6.1 Bendable Extension - A bendable extension is an extension designed to be bent at the time of installation. 2.2.6.2 Rigid Extension - A rigid extension is an extension not designed to be bent at the time of installation. 2.2.7 Bulb Extension Length - The extension l
25、ength is the length from the sensitive portion of the bulb to the connector. (See Fig. 7). 12.3 Plain Bulb - A plain bulb is a bulb not provided with a union connection or other means for attachment to a vessel. (See Fig. 5). 2.4 Union Connected Bulb - A union connected bulb is a bulb provided with
26、a pressure-tight union connection for installation (See Fig. 6). 2.4.1 Union Connected Bulb Assembly - A union connected bulb assembly is a union connected bulb and means, such as a bushing, flange, or well, for pressure-tight attachment to a vessel (See Fig. 8). 2.5 Coated Bulb - A coated bulb is a
27、 bulb coated with a corrosion resistant material not affected by the media in which it is to be immersed. 2.6 Sanitary Bulb - A sanitary bulb is a bulb for use where sanitary requirements must be met, designed to prevent introducing or retention of foreign matter and to facilitate cleaning. 2.7 Capi
28、llary - The capillary is a tubing, normally flexible and connects the bulb to the expansion device in the actuator. The energy of the fluid fill is transmitted through the capillary tubing to the expansion device with in turn positions the valve plug. 2.8 Armor - The armor is a heavy interlocked spi
29、ral metal which protects the capillary. 2.9 Union Connection - A union connection is that portion of a union connected bulb which comprises a seating part either rigidly attached to or adjustable along the extension and jam nut for attachment to a bushing, flange or well (See Fig. 6). 2.10 Bushing -
30、 A bushing is a fitting provided with external threads for pressure-tight attachment to a vessel and with internal threads or other seating means for mounting a union connected bulb (See Fig. 8). 2.11 Well - A well is a pressure-tight receptacle adapted to receive a union connected bulb and provided
31、 with external threads or other means for pressure-tight attachment to a vessel (See Fig. 8). 2.11.1 Well Length - A well length is the length of the bulb plus 1/4“. This is an inside measurement form the bottom of the bulb seat to the end of the well. 2.11.2 Lagging Extension - A lagging extension
32、is that portion of a bushing or well, above the external threads, intended to extend through the lagging (insulation) of a vessel or pipe (See Fig. 8). 2.11.3 Lagging Extension Length - The lagging extension length is the length from the lower end of the external threads of a bushing or well to the
33、upper end of the portion intended to extend through the lagging of a vessel, less one inch allowance for threads (See Fig. 8). NOTE: For purposes of uniform dimensioning, the allowance for thread length is one inch, regardless of pipe thread size. 2.12 External Threads For Bushings Or Well - Externa
34、l threads for bushings or wells shall be American Standard Taper Pipe Threads (NPT) of the American National Standards Institute. 2.13 Flange - A flange is a fitting provided with a flanged surface for attaching to a vessel and unless integrally fastened to the bulb by welding or seal brazing, shall
35、 have internal threads or other sealing means for mounting a union connected bulb. The flange dimensions shall conform to the appropriate ANSI Standard for the specified material. 3. REFERENCES AND ACKNOWLEDGEMENT 3.1 Much of the definition, terminology and wording in this standard agrees with that
36、found in Scientific Apparatus Manufacturers Association Standards PMC 6-10-1963. The Institute recognizes the enormous task performed by the Process Measurement & Control Section of Scientific Apparatus Manufacturers Association in preparing these standards. 2FIGURE 1 Filled Thermal Systems for Remo
37、te Sensing Temperature Regulator 3FIGURE 2 Vapor Pressure Thermal System Class II A (Measured Temperature Above the Temperature of the Rest of the Thermal System) 4FIGURE 3 Vapor Pressure Thermal System Class II B (Measured Temperature Below the Temperature of the Rest of the Thermal System) 5FIGURE 4 Vapor Pressure Thermal System Class II C 6FIGURE 5 Plain Bulb FIGURE 6 Union Connected 7FIGURE 7 Sensitive, Immersion and Insertion Lengths FIGURE 8 Union Connected Bulb Assembly and Bulb and Well Assembly with Lagging Extension 8
