Yoshitake AF-10EN Product Manual Download Page 1

EPDT-395

 

MODEL AF-10EN 

FULL BORE SAFETY VALVE 

 

PRODUCT MANUAL

 

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Thank  you  very  much  for  choosing  the  Yoshitake’s  product.    To  ensure  the  correct  and  safe  use  of  the 

product, please read this manual before use.    This manual shall be kept with care for future references. 
The symbols used in this manual have the following meanings. 

 

          Warning 

This symbol indicates a potentially hazardous situation that, if not avoided, may 
result in death or serious injury. 

          Caution 

This symbol indicates a potentially hazardous situation that, if not avoided, may 
result in minor or moderate injury or may result in only property damage. 

 

 

Table of Contents 

 

1. Specifications ···························································· 1 

2. Dimensions and structure ············································ 2 

3. Operation   ······························································· 3 

4. Nominal size selection table ········································· 4 

5. Installation   ······························································ 5 

6. Precautions for use ···················································· 7   

7. Maintenance ····························································· 8 

7.1 Daily inspection ··················································· 8 

7.2 Periodic inspection ··············································· 8 

7.3 Troubleshooting ··················································· 9 

Warranty Information 

 

 

 

 

 

 

 

 

 

 

 

 

Summary of Contents for AF-10EN

Page 1: ...s symbol indicates a potentially hazardous situation that if not avoided may result in death or serious injury Caution This symbol indicates a potentially hazardous situation that if not avoided may r...

Page 2: ...pressure MPa 1 6 1 55 1 47 1 39 Note Intermediate values may be obtained by linear interpolation Caution 1 Please do not use this product for equipment or device which does not allow the valve seat l...

Page 3: ...Parts No Name of Parts 1 Body 10 Spindle B 2 Spring Chamber 11 Spring 3 Cap 12 Adjusting Screw 4 Lever 13 14 Stud Bolt 5 Valve 15 Hexagon Nut 6 Valve Seat 16 Square Head Plug 7 Valve Cover 17 Name Pl...

Page 4: ...e 2 Start to discharge As the inlet pressure increases the force pushing up the valve becomes closer to the spring force pushing down the valve and the product starts to discharge 3 Discharge When the...

Page 5: ...7328 18469 19604 80A 17501 19229 20945 22658 24368 26086 27803 29513 100A 27195 29881 32547 35208 37866 40535 43203 45859 For Air 20 C EN ISO 4126 1 2013 kg h Nominal size Pressure MPa 0 1 0 2 0 3 0 4...

Page 6: ...ations Ensure that the piping can flow all the discharged fluid sufficiently When the fluid is being discharged from several safety valves by means of one common pipe the flow passage area of such com...

Page 7: ...unt should be equal to or larger than that of the product inlet 2 Discharge pipe 2 1 Install a discharge pipe and drip pan elbow to ensure that the product is free from the stress caused by the therma...

Page 8: ...lowing through the product with using the lever 4 Moving the lever causes loosening of spring pressure and thus allows minimum lift of valve and blow of fluid 2 Make the inlet pressure 80 of the set p...

Page 9: ...piping before leaving the product not operated for a long time Failure to follow this notice may cause foreign substances and scale inside of the piping and may result in malfunction of the product 3...

Page 10: ...t a pressure lower than the set pressure 1 Product specifications are not consistent with the usage conditions 1 Check the set pressure value shown on the nameplate If the product is not suitable for...

Page 11: ...han expected 4 The pressure reducing valve needs repair If it is Yoshitake s please contact us The lever does not lift up 1 Inlet pressure is too low 1 Increase the inlet pressure to 80 of the set pre...

Page 12: ...improvement without any prior notice After the discontinuation of the product Yoshitake supplies the repair parts for 5 years otherwise individually agreed 3 This warranty does not cover the damage d...

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