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MODEL AL-250, AL-250R, AL-260, AL-260R
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
Caution
1. Usage of the Product ·················································· 1
2. Specifications···························································· 1
3. Dimensions and Weight ··············································· 2
4. Structure ································································ 3
5. Operation ······························································· 3
6. Nominal Size Selection Chart ······································· 4
7. Installation ································································ 5
8. Maintenance ····························································· 6
Warranty Information
RELIEF VALVE
PRODUCT 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 or may result in only property damage.
7.1 Piping example ···················································· 6
8.1 Daily inspection ··················································· 7
8.2 Regular inspection ··············································· 7
8.3 Troubleshooting ··················································· 8
8.4 Procedure for set pressure adjustment ······················ 9
Table of Contents
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Related Manuals for Yoshitake AL-250
Summary of Contents for Yoshitake AL-250
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Page 1: Table Of Contents
RELIEF VALVE PRODUCT 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 symbols used in this manual have the following meanings. -
Page 2: Usage Of The Product
1. Usage of the Product The model AL-250,250R,260,260R are the relief valves for the purpose of the regulating the pressure of the pulsating pressure and fluctuating pressure for the large capacity pump. 2. Specifications Model AL-250 AL-250R AL-260 AL-260R Closed type... -
Page 3: Dimensions And Weight
3. Dimensions and Weight AL-260R AL-250 AL-250R AL-260 Fig.1 Dimensions Dimensions [mm] Nominal size AL-250 AL-260 AL-250 AL-250R AL-260 AL-260R AL-260R AL-250R Rc 1/2 Rc 3/4 Rc 1 51.5 51.5 Rc 1 1/4 63.5 63.5 Rc 1 1/2 68.5 64.5... -
Page 4: Structure
4. Structure AL-250R, AL-260R AL-260, AL-260R AL-250 Part name Part name Part name Spring case Top spring plate Rivet Valve seat Adjusting screw Name plate Valve Lock nut O ring Spindle 10 Cap Handle Spring 11 Gasket Valve Case Bottom spring plate 12 Gasket Fig.2 Structure... -
Page 5: Nominal Size Selection Chart
6. Nominal Size Selection Chart In case of the accumulation is 25% (Excess value to the setting pressure), the flow rate of each size can be referred on figure3. Setting Pressure M Pa （ ） Fig.3 Nominal size selection chart The blow out capacity for main pressure is in the following table. -
Page 6: Installation
* Failure to follow this notice may prevent the product from functioning properly and lead to danger. 4. When installing, tighten the hexagonal part of the valve seat [2] for AL-250 and AL-250R, and the valve case [17] for AL-260 and AL-260R with a spanner. -
Page 7: Piping Example
Cleaning the inside of the piping 1. Please clean the inside of the pipe thoroughly and remove any dust or scales before installing the product. Please note that all repairs for disorders due to foreign substances shall be charged. Pipe mount 1. -
Page 8: Daily Inspection
Caution 1. Before applying higher pressure fluid to the product, check that no problems have occurred in the equipment on the piping. * Failure to follow this notice may damage the equipment. 2. Completely discharge fluid from the product and piping before leaving the product not operated for a long time. -
Page 9: Troubleshooting
5. The product is installed at outlet 5. The pressure reducing valve needs to be side of pressure reducing valve repaired. If it is Yoshitake’s product, which is out of order, and the please contact us. reduced pressure of the valve is getting higher than expected. -
Page 10: Procedure For Set Pressure Adjustment
* Handle can be turned only within the limited numbers of turns. Using tools or turning it with excessive force causes damage to the handle or malfunction of the product. Procedure for adjusting the set pressure of AL-250 and AL-260 (See” Fig. 2 Structure.”) Remove the cap [10] with a spanner etc.