EPDT-021a
MODEL GDK-2000
PRESSURE REDUCING 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,
could result in death or serious injury.
Caution
This symbol indicates a 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
2. Dimensions and Weights ············································· 2
3. Operation ································································ 3-5
4. Nominal Size Selection
method
4.1 Pressure reducing valve specification selection chart ··· 6
4.2 Safety valve setting pressure chart ··························· 6
4.3 Characteristic chart ············································· 7
4.4 Nominal size selection chart ·································· 8
4.5 Nominal size selection calculation formula ················· 9
5. Installation
5.1 Precaution for installation ····································· 10
5.2 Installing accessories ·········································· 10
5.3 Piping before and after the pressure reducing valve ··· 11
5.4 Piping example ·················································· 12
6. Operation procedure
6.1
Precaution for operation ······································ 13
6.2 Adjusting procedure ············································ 13
7. Maintenance Procedure
7.1 Troubleshooting ················································· 14
7.2 Precaution for maintenance and inspection ·············· 15
7.3 Disassembly ····················································· 15
7.4 Precaution for reassembly ···································· 15
7.5 Exploded drawing ·············································· 16
Warranty Information