Yoshitake GD-400, Product Manual

Page: 1 / 25

■EPDT-179c■
Model GD-400
･
･ ･
･
400SS
PRESSURE REDUCING VALVE
Product Manual
Handling Precautions and Limitation of Warranty
Thank you for purchasing the Yoshitake pressure reducing valve. It is important that you carefully
read through this manual before using it for your proper and safety use.
Keep this manual in convenient place so you can refer to it as you need.
If the product becomes failure or defective because it has been mishandled or improperly operated,
the user shall agree to pay charges for repair or replacement.
――――
Please note the following caution icons and conventions used in this manual.
――――
Warning
Failure to comply with a warning message could result in severe
personal injury or death.
Caution
Failure to heed a caution message could result in personal injury or
damage to the equipment or facilities.
Contents
1.
Product application
----------------------------------------------------------- 1
2.
Specification
-------------------------------------------------------------------- 1
3.
Dimensions and parts
-------------------------------------------------------- 2
4.
Theory of operation
----------------------------------------------------------- 3
5.
Nominal size selection
5.1 Pressure r
educing valve specifications selection chart
-------- 4
5.2 Flow characteristics chart ---------------------------------------------- 4
5.3 Pressure characteristics chart ---------------------------------------- 4
5.4 Nominal size selection
5.4.1
Nominal size selection chart
------------------------------------- 5
5.4.2
Calculating a nominal size
---------------------------------------- 6
6.
Installation guideline
6.1
Diagram of piping example
--------------------------------------------- 7
6.2
Warning and precaution on installation
------------------------ 7
～
8
6.3
How to connect optional parts
----------------------------------------- 9
7.
Operation guidelines
7.1
Warning and precaution on operation
------------------------------- 9
7.2
Adjustment
7.2.1
Pressure setting is not preset
---------------------------------- 10
7.2.2 Pressure setting is preset --------------------------------------- 10
7.3 Adjustment of needle valve ------------------------------------------- 11
8. Maintenance guideline
8.1
Warning and precaution on maintenance and inspection
--- 12
8.2
Troubleshooting
---------------------------------------------------------- 13
8.3
Exploded drawing
-------------------------------------------------------- 14
8.4 Troubleshooting procedure ------------------------------------- 15
～
24
After Sale Service