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ＦＵＬＬ ＢＯＲＥ
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ＦＵＬＬ
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Thank you very much for purchasing our safety valves.
Please read this instruction manual thoroughly before using the safety valve, so that
you may do so correctly and safely. Please carefully store this manual in a handy place.
－－－－－－The following safety symbols are used in this manual.－－－－－
Warnings
Cautions
1 . F e a t u r e s ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ 1
2 . S p e c i f i c a t i o n s ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ 1
3 . D i m e n s i o n s a n d w e i g h t s ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ 2
4 . S t r u c t u r e ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ 3
5 . O p e r a t i o n ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ 4
6.1 For Steam (Pressure vessel structure specifications
・ B o i l e r s t r u c t u r e s p e c i f i c a t i o n s ) ･ ･ ･ ･ ･ 4
6.2 For Air (Pressure vessel structure specifications )･･････4
7 . 1 E x a m p l e o f p i p i n g ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ 5
8 . 1 D a i l y i n s p e c t i o n ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ 6
8.2 Operational inspection････････････････････････････････ 7
8.3 Pe riodic inspe ction･ ･････ ･･････････････････ ･･･････････ 7
8.4 Troubleshooting ･･････････････････････････････････････ 7
A f t e r s a l e s s e r v i c e
ＡＦ−７・７Ｍ
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ＢＯＲＥ ＳＡＦＥＴＹ
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Instruction Manual
This symbol indicates a potentially hazardous situation that, if not avoided,
could result in death or serious injury.
This symbol indicates a hazardous situation that, if not avoided, may result in
minor or moderate injury. ("Caution" may also be used to indicate other unsafe
practices or risks of property damage.)
Contents
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ＳＡＦＥＴＹ ＶＡＬＶＥ
ＳＡＦＥＴＹ
ＳＡＦＥＴＹ
ＶＡＬＶＥ
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Table of Contents
Related Manuals for Yoshitake AF-7
Summary of Contents for Yoshitake AF-7
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Page 1: Table Of Contents
ＡＦ−７・７Ｍ ＡＦ−７ ・７Ｍ ＡＦ−７ ＡＦ−７ ・７Ｍ ・７Ｍ ＦＵＬＬ ＢＯＲＥ ＦＵＬＬ ＢＯＲＥ ＳＡＦＥＴＹ ＳＡＦＥＴＹ ＶＡＬＶＥ ＶＡＬＶＥ ＦＵＬＬ ＦＵＬＬ ＢＯＲＥ ＢＯＲＥ ＳＡＦＥＴＹ ＳＡＦＥＴＹ ＶＡＬＶＥ ＶＡＬＶＥ Instruction Manual Thank you very much for purchasing our safety valves. Please read this instruction manual thoroughly before using the safety valve, so that you may do so correctly and safely. -
Page 2: Overview･･･････････････････････････････････････････････1
Overview Suited for installation on steam boilers, various pressure vessels, instrumentation apparatus, and the secondary side of pressure reducing valves. Yoshitake’s Safety Relief Valves prevent accidents due to the abnormal rise in piping pressure. 1. Features The product is designed according to JIS B 8210 for spring loaded safety relief valves for steam boilers and gas pressure vessels. -
Page 3: Dimensions And Weights
(mm (mm) (mm) (mm) AF-7 AF-7M Outlet 200.9 25×32 40×50 490.6 50×65 803.8 65×80 1256.0 10.0 80×100 1962.5 12.5 100×125 3316.6 16.3 ＊ All values for types AF-7 and AF-7M are identical except dimension of H - 2 - ■EＰＤＴ－１６８a■... -
Page 4: Structure
4. Structure Figure 2 Structure No. Name of parts No. Name of parts Body Valve seat Spring Drain plug (R3/8) Spindle Seat ring Spring chamber Valve Lever (on Model AF-7) Valve holder Name plate Guide Seal - 3 - ■EＰＤＴ－１６８a■... -
Page 5: O P E R A T I O N
5．Operation Discharge When the pressure at the inlet side of the safety valve rises and approaches the set pressure, the fluid pressure which pushes the valve ⑦ approaches the pressure of the spring ⑮ which is holding down the valve ⑦. Pre-leaking which is as low as 3% of the discharge pressure occurs at this point. -
Page 6: Installation
(9) Please ensure that the piping connections are secure. ＊Improper connections can result in leaking from the joints with vibrations, and scalding from the fluid. (10) Since the fluid leaks from model AF-7 upon operation, please take measures to prevent soiling of other equipment. - 5 -... -
Page 7: M A I N T E N A N C E
●Cleansing the inside of the piping (1) Please cleanse the inside of the pipe thoroughly and remove any dust or scales before installing the product. Please note that all repairs for disorders due to foreign matters shall be charged. ●Installation pipe mount for the safety valve (1) The pipe mount for the safety valve should have sufficient strength and rigidity against compression, shear and bending stress that is caused in the reaction against the exhaust flowing up through the exhaust pipe attached to the safety valve. -
Page 8: Operational Inspection
(2) In case of model AF-7 (lever type), raise the fluid pressure to 75% of the set pressure or higher, raise the lever, and check to see that the fluid blows out. In case of type AF-7M (closed type), raise the fluid pressure to the set pressure, and confirm that the product operates.