Yoshitake GPK-2001, Installation & Operation Manual

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EPDT-098a

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Model GPK-2001, GPK-2003 

PRESSURE REDUCING VALVE   

Installation & Operation Manual 

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 following safety symbols are used in this manual. ―――――――― 

Warning

  Caution

Contents 

1. Specifications ···························································· 1~2 
2. Dimensions and Weights ············································· 2~3 
3. Operation ································································· 4~6 
4. Nominal Size Selection Method 

4.1 Specifications selection chart ····································· 7 
4.2 Safety valve setting pressure chart ······························ 7 
4.3 Characteristics chart ················································· 8 
4.4 Nominal size selection chart ······································· 9 
4.5 Nominal size selection calculation formula ···················· 10 

5. Installation 

5.1 Precautions for installation ········································ 11 
5.2 Installing accessories··············································· 11 
5.3 Piping before and after the pressure reducing valve ········ 12 
5.4 Example of piping ··················································· 13 

6. Operating Procedure 

7.1 Precautions for operation ·········································· 14 
7.2 Adjustment procedures ············································ 14 

7. Maintenance Procedure 

8.1 Troubleshooting ··················································· 15~16 
8.2 Precautions for maintenance and inspection ················· 16 
8.3 Disassembly ······················································· 16~17 
8.4 Precautions during reassembly ·································· 17 
8.5 Exploded drawing ················································ 18~19 

Warranty Information 

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.)