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1、JIS JAPANESE INDUSTRIAL STANDARD Wafer type rubber-seated butterfly valves Translated and Published by Japanese Standards Association UDC 621.646.25 Printed in Japan 10 s - JIS B*i2032 75 W 4733b08 0531798 034 W In the event of any doubt arising, the original Standard in Japanese is to be final auth
2、ority Errata for TIS (English edition) are printed in Standardization Journal, published monthly by the Japanese Standards Association. Errata will be provided upon request, please contact: Business Department, Japanese Standards Association 4-1-24, Akasaka, Minato-ku, Tokyo, JAPAN 107 TEL. 03-3583-
3、8002 FAX. 03-3583-0462 Errata are also provided to subscribers of JIS (English edition) in Monthly Information. J I S BX2032 95 = 4933608 0533799 T70 UDC 621.646.25 JAPANESE INDUSTRIAL STANDARD J I S Wafer type rubber-seated butterfly valves B 2032-1995 1. Scope This Japanese Industrial Standard spe
4、cifies the wafer type rubber- seated butterfly valves (hereafter, referred to as “valves“.) to be used for pipings for general equipments such as mechanical equipments, building equipments and water treatment. However, this does not apply to those for ships and water works. Remarks 1. The standards
5、cited in this Standard are as follows. JIS B O100 JIS B 2002 JIS B 2003 JIS B 2004 JIS B 2210 JIS B 8270 JIS G 3101 JIS G 3201 JIS G 3202 JIS G 3214 JIS G 4303 JIS G 4304 Glossary of terms for valves Face-to-face and end-to-end dimensions of valves General rules for inspection of valves General rule
6、s for marking on valves Basic dimensions of ferrous material pipe flanges Pressure vessels (General standard) Rolled steels for general structure Carbon steel forgings for general use Carbon steel forgings for pressure vessels Stainless steel forgings for pressure vessels Stainless steel bars Hot ro
7、lled stainless steel plates, sheets and strip JIS G 4305 JIS G 5101 JIS G 5121 JIS G 5151 JIS G 5501 JIS G 5502 JIS G 5702 JIS H 3250 JIS H 5111 JIS H 5114 JIS H 5302 Cold rolled stainless steel plates, sheets and strip Carbon steel castings Stainless steel castings Steel castings for high temperatu
8、re and high pressure service Grey iron castings Spheroidal graphite iron castings Blackheart malleable iron castings Copper and copper alloy rods and bars Bronze castings Aluminium bronze castings Aluminium alloys die castings -,-,- 2 B 2032-1995 2. The International Standard corresponding to this S
9、tandard is given in the following: IS0 5752 : 1982 Metal valves for use in flanged pipe systems - Face-to-face and centre-to-face dimensions 3. The units and numerical values given in 1 in this Standard are in accordance with traditional units and are appended for informative reference. 2. Definitio
10、ns O100 apply, and others are in accordance with the following: For the purposes of this Standard, the definitions in JIS B (1) central type The structural type of which outer periphery of valve disc is on the same plane as the centre of valve stem (see Fig. 1). Fig. 1. Example of central type , I ,
11、 0 Valve body h Rubber seat o Valve disc Valve stem (2) eccentric type The structural type of which outer periphery of valve disc is not on the plane containing the centre line of valve stem and is on a plane parallel to it (see Fig. 2). Fig. 2. Example of eccentric type Where rubber seat is attache
12、d to valve body Where rubber seat is attached to valve disc 0 Valve body 0 Rubber seat 0 Valve disc 0 Valve stem - (3) minimum inner diameter In the case where the rubber seat is attached to valve body the minimum inner diameter of rubber seat, and where it is attached to valve disc, the minimum inn
13、er diameter of valve body (see Fig. 4). -,-,- J I S Ba2032 95 W 4933608 053L80L 459 W l P. 1 I 3 B 2032-1995 (4) rubber seat The rubber constitutes the valve seat being attached to valve body or valve disc. (5) face-to-face and end-to-end dimensions These shall be in accordance with JIS B 2002. The
14、dimensions between the valve end faces under piping condition of the valve. (6) trim Main parts inside of valve and other parts. Remarks: In this Standard, it means the valve stem, rubber seat, seat surface to contact the rubber seat, connecting part of valve stem with valve disc and bush. 3. Classi
15、fication following. The classification of the valves shall be as given in the Types type. Nominal pressures 16 K. Nominal diameters 65 mm, 80 mm, 100 mm, 125 mm, 150 mm, 200 mm, 250 mm, 300 mm, 350 mm, 400 mm, 450 mm, 500 mm and 600 mm. Working ranges The types shall be two types of the central type
16、 and eccentric The nominal pressures shall be two types of 10 K and The nominal diameters shall be 14 types of 50 mm, The working ranges of the valves shall be as given in the following. (1) Pressure and temperature The maximum permissible working pressures and working temperature ranges of the valv
17、es shall be in accordance with Table 1. -,-,- J I S BX2032 95 = Y933b08 0533802 395 Working temper- ature range “C 4 B 2032-1995 Rubber seat material Table 1. Maximum permissible working pressures and working temperature ranges O to 70 Nominal pressure Acrylonitrile butadiene rubber (NBR), chloropre
18、ne rubber (CR) 10 K 1.5716) O to 70 o to 90 l.lO(11.2) 120 max. 16 K NBR, CR EPDM Maximum permissible working pressure MPa kgf/cm2) 0.98101 0.697 o to 90 Ethylene propylene rubber (EPDM) 120 max. Remarks 1. The vacuum specifications shall be as agreed between the parties concerned. 2. The rubber sea
19、t material other than specified in Table 1 and the use under 0C shall be as agreed between the parties concerned. 3. As to the EPDM, refer to the Pressure - temperature charac- teristics of Fig. 3. 4. The EPDM shall not be used for the oils as mineral oil, vegetable oil, etc. Fig. 3. Pressure - temp
20、erature characteristics of EPDM - Temperature “C -,-,- 5 B 2032-1995 (2) Flow velocity The informative values of the maximum flow velocities in pipe at the time when the valve opened fully are given in Informative reference Table 1. Informative reference Table 1. Maximum flow velocity in pipe when t
21、he valve opened fully unit: Ids Fluid Nominal pressure Gas I 30 5. Performances the following. The performances of the valves shall be in accordance with Pressure resistance of valve body itself After the hydraulic pressure of three times the maximum permissible working pressure has been applied to
22、the valve body for ten minutes, there shall be no abnormality on the valve body. Sealing property of valve seat pressure or hydraulic pressure of 1.1 times the maximum permissible working pressure was applied for one minute, no leakage from the seat part shall be found. However, for that with restri
23、ction on flow direction, apply the pressurize from the specified direction. Close the valve, and after the pneumatic Further, in the case where the pneumatic pressure is used, nitrogen gas may also be used instead of air. Required force for operation of manual valve Close the valve, and after the hy
24、draulic pressure of the maximum permissible working pressure was applied from one side, it shall be capable of being opened and closed at 392 N(40 kgB or under. Measurement shall be carried out by pulling the outer end of lever or handle by a spring balance. Durability working pressure under fully c
25、losed state, using the clean water of ordinary temperature, and after 10000 times of full closing and full opening opera- tions of valve have been carried out repeatedly, the performance of (2) shall have been sustained. Apply the hydraulic pressure of the maximum permissible Pressure resistance of
26、valve disc and valve stem measures to prevent the seat leakage, and after the hydraulic pressure of 1.5 times the maximum permissible working pressure was applied to the valve disc and valve stem for one minute, the performances of (2) and (3) shall have been sustaiDed. However, for that with restri
27、ction on flow direction, pressurize from the specified direction. Close the valve, take -,-,- I l 6 B 2032-1995 JIS Br2032 95 4933bO 053LOY Lb H StrengtLl of transferring part of opening-and-closing force disc fixed, after applying three times the maximum value of the open-close operation torque und
28、er the maximum permissible working pressure applied to the torque operating part, the opening and closing shall be made smoothly, as well as the performances of (2) and (3) shall be maintained. With the valve 6. Construction following. The construction of the valves shall be as given in the The valv
29、e body shall be provided with a pair of bearings confronting in bore diameter direction to be of a structure to support the valve stem, and shall be so constructed as to be capable of attaching the driving apparatus at its one end. The rubber seat shall be so constructed as to be attached to either
30、of the valve body side or valve disc side. The attaching method of the rubber seat shall be as agreed between the parties concerned. In the case where the seat face with the rubber seat is of cast iron or carbon steel, the seat face shall be subjected to the surface treatment having durability as pl
31、ating, or the like. The valve disc shall be so made as to be parallel to the flow direction of the fluid at the time of full opening. The valve disc and valve stem shall be connected by an appropriate method, shall transmit the opening and closing operation force of the valve securely, as well as sh
32、all have sufficient strength. The valve stem penetrating part of the valve body shall be of such structure that the inner fluid does not leak to the outside. The structure of the driving apparatus shall be of manual or automatic type, and shall be as given in the following. As to the opening and clo
33、sing of the valve, the counterclockwise turning of the handwheel shall be defined as the “opening“, and the clockwise turning as the “closing“. The driving apparatus shall be provided with an apparatus capable of identifying the opening and closing of the valve. The driving apparatus shall be provid
34、ed with a stopper so that the valve disc stops correctly at the prescribed position of the “open“ or “close“. For the valve to be used at the intermediate opening, it should preferably be provided with a locking device. However, except where the driving apparatus itself has the locking function. Whe
35、n the driving apparatus other than the manual type is to be attached, it shall be as agreed between the parties concerned. -,-,- JIS BX2032 95 4933608 053L805 OT4 W 46 43 46 46 52 56 56 60 68 78 78 102 114 127 154 I. 47 - - 49 56 64 70 71 76 83 92 102 114 127 154 7 B 2032-1995 diameter 7. Dimensions
36、 ing. The dimensions of the valves shall be as given in the follow- 65 80 100 125 150 200 250 300 350 400 450 500 600 - (i) The face-to-face and end-to-end dimensions of the valves shall be in accord- ance with any one of the series number 46, 47 or 48 of Table 2. The tolerances on the face-to-face
37、and end-to-end dimensions shall be f 2 mm. Table 2. Face-to-face and end-to-end dimensions Unit: mm Series number - 48 43 46 64 64 70 76 89 114 114 127 140 152 152 178 Remarks: The series numbers 46, 47 and 48 shall be in accordance with the basic series dimensions of IS0 5752. Informative reference
38、: The series numbers given in Table 2 conform to JIS B 2002. (2) The connections with the pipe flanges shall be those conforming to the 10 K flanges or 16 K flanges of JIS B 2210. (3) In order to prevent the interference with the pipings, when the valves have been opened fully, the valve disc shall
39、have clearances given in Table 3 in respect to the bores of the pipes of schedule 40. Table 3. Clearaces with pipings Unit: mm 150 Max. Remarks: The clearance means the dimension given in Fig. 4. -,-,- 31s BX2032 95 4933b08 0533806 T30 Eccentric type 8 B 2032-1995 Nominal diameter x 0.85 Fig. 4. Cle
40、arance between pipe bore and valve disc Maximum outer Clearance (4) The minimum bores shall be in accordance with Table 4. Table 4. Minimum bores Unit: mm _ _ Central type I Nominal diameter x 0.9 8. Materials The materials of the valves shall be as given in th folla ring. (i) The materials of the v
41、alve body, valve disc, valve stem and rubber seat shall be selected from Table 5. In this case, the materials suitable to the working fluid and working conditions shall be selected as agreed between the parties concerned. -,-,- 9 B 2032-1995 Table 5. Materials of valve body, valve disc, valve stem a
42、nd rubber seat Name of part Valve body Valve disc Valve stem Rubber seat Division of materials Iron castings Steel forgings Steel castings Stainless steel Copper alloy Aluminium Iron castings Steel forgings Steel castings Steel plates and sheets Stainless steel Stainless steel plates and sheets Copp
43、er alloy Stainless steel Copper alloy Rubber Materials FC200 of JIS G 5501 or superior, or FCD370, FCD400, FCD450 of JIS G 5502 or FCD-S of JIS B 8270 or FCMB340 of JIS G 5702 or superior SF440 of JIS G 3201 or superior, or SFVC2A or SFVC2B of JIS G 3202 SC480 of JIS G 5101 or superior, or SCPH1 of
44、JIS G 5151 or superior SUS300 series of JIS G 3214 or JIS G 4303, or austenitic series of JIS G 5121 BC6 of JIS H 5111 or superior, or AlBC2 of JIS H 5114 or superior ADC12 of JIS H 5302 (However, applies only to central type.) FC200 of JIS G 5501 or superior, or FCD370, FCD400, FCD450 of JIS G 5502
45、 or FCD-S of JIS B 8270, or FCMB340 of JIS G 5702 or superior SF440 of JIS G 3201 or superior, or SFVCBA or SFVC2B of JIS G 3202 SC480 of JIS G 5101 or superior, or SCPH1 of JIS G 5151 or superior SS330 of JIS G 3101 or superior SUS300 series or SUS400 series of JIS G 3214 or JIS G 4303, or austenit
46、ic series of JIS G 5121 SUS300 series of JIS G 4304 or JIS G 4305 BC6 of JIS H 5111 or superior, or AlBC2 of JIS H 5114 or superior SUS304, SUS316, SUS403, SUS42OJ2, SUS431 or SUS630 of JIS G 4303 C6161 of JIS H 3250 or superior NBR, CR or EPDM Remarks: “Superior“ in material shown in Table 5 means
47、the material of the same standard number specified in the Japanese Industrial Standard and equi- valent or superior to the material specified in Table 5 in tensile strength. -,-,- J I S BX2032 95 = 4933608 053L606 603 10 B 2032-1995 (2) The materials of the trims shall be those suitable to the worki
48、ng conditions. (3) The permissible stress, in the case of iron castings and aluminum, shall be 1/5 the minimum tensile strength, and in the case of iron and steel series and copper alloy series, shall be of 1/3. (4) The materials to be used for other parts shall be those suitable to the working conditions. 9. Inspections carried out. Prior to shipment of valves the following inspection shall be (i) Shell inspection Slightly open the valve, fix the valve by suitable method such