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Please read this bulletin thoroughly before using the pressure reducing valve, so that you may do so
correctly and safely. Please carefully store this bulletin in a handy place.
---------The following safety symbols are used in this manual. --------
Warning
Caution
1. Features ················································································································· 1
2. Specifications ········································································································· 1
3. Dimensions and Weights····················································································· 1
4. Operation ··············································································································· 2
5. Nominal Size Selection Chart ············································································ 3
6.1 Example of piping ·························································································· 4
6.2 Precautions during installation ··································································· 4
7.1 Precautions during operation ······································································ 5
7.2 Adjustment procedures ················································································ 5
8.1 Troubleshooting ····························································································· 6
8.2 Precautions during maintenance and inspection ···································· 6
8.3 Disassembly ···································································································· 7
8.4 Exploded drawing ··························································································· 7
After Sale Service
Model ＧＤ－３０
PRESSURE REDUCING VALVE
Installation & Operation 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
■PDT－136a■
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Summary of Contents for Yoshitake GD-30
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Page 1: Table Of Contents
Model ＧＤ－３０ PRESSURE REDUCING VALVE Installation & Operation Manual Please read this bulletin thoroughly before using the pressure reducing valve, so that you may do so correctly and safely. Please carefully store this bulletin in a handy place. ―――――――――The following safety symbols are used in this manual. ―――――――― This symbol indicates a potentially hazardous situation that, if not avoided, ... -
Page 2: Features
Features The compact, ultra-light GD-30 direct acting type pressure reducing valve features, Multi-function, ultra-light and economical pressure reducing valve, consists of a stainless steel valve and valve seat, and a stainless bellows sensor with pressure on the outside for high durability. The valve is well suited for a wide range of applications, including kitchen systems, cleaning machines, disinfecting equipment, and food processing equipment, etc. -
Page 3: Operation
Operation When the adjusting screw(⑪,⑫) connected to the handle (④, pushes the spring(⑫,⑬)，the bellows(⑩, ) ⑨) are extended and the spindle(⑧,⑥) opens the valve(⑦,⑤).When the valve opens, the steam flowing to the outlet side passes through the reduced pressure detection hole, and becomes an upwardly directed pressure under the bellows and balances the force of the spring. -
Page 4: Nominal Size Selection Chart
Nominal Size Selection Chart ≪Example≫ Under the following operating conditions, the appropriate nominal size would be determined as described below. ･Inlet pressure(P ): 1.3MPa ･Reduced pressure(P ): 0.6MPa ･Steam flow rate:200kg/h First, find the point where the inlet and reduced pressures intersect. Next draw a line straight down from that point to the nominal size scale where a flow rate of 200kg/h or more is indicated. -
Page 5: Installation
Installation 6.1 Example of piping 6.2 Precautions during installation Warning In case installing safety valve as safety device at outlet side, joint relief pipe at outlet of safety valve and guide it to safety place where steam can relief out. ※Failure to do so may result in burns. -
Page 6: Operating Procedure
Operating Procedure 7.1 Precautions during operation Warning (1) Do not touch the valve directly with bare hands. ※Doing so may result in burns. (2) Before flow the steam in pipe line, make sure steam can flow without any dangerous at the end of pipe line and pipe line is connected tightly. -
Page 7: Maintenance Procedure
※There is a possibility that the handle is stuck and cannot be removed. It is easier to turn the handle to obtain high reduced pressure if a screwdriver(axis diameterφ6) is used as follows.(For the nominal sizes of 40A and 50A) (1) Lift up the handle to unlock.。... -
Page 8: Disassembly
8.3 Disassembly Procedure (Refer to 4.Operation) (1) Discharge the valve's internal pressure until a zero pressure condition is established. (2) While lifting the handle, turn it in the Counter-Clock Wise direction(minus direction of nameplate at top of handle) until the spring is free(no-load). (3) Unscrew the bolt which secures the Spring Chamber and remove the Spring Chamber(handle etc. - Page 9 40A,50A ※Part names shown in boxes are consumable items. ■PDT－136a■...
- Page 10 Fire, flood, earthquake, thunder and other natural disasters. Consumable parts such as O-ring, gasket, diaphragm and etc. Yoshitake is not liable for any damage or loss caused by malfunction or defect of the product. INTERNATIONAL DEPT. 955-5, Miyamae, Irukadeshinden, Komaki, Aichi, 485-0084, Japan...