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PDD-046f 

Warranty Information 

 

1.  Limited warranty 

This product has been manufactured using highly-advanced techniques and subjected to 

strict quality control.    Please be sure to use the product in accordance with instructions on 

the manual and the label attached to it. 

Yoshitake warra

nts the produc

t to be free from any defects in material and workmanship 

under normal usage for a period of one year from the date of receipt by the original user, but 

no longer than 24 months from the date of shipment from Yoshitake’s factory. 

 

2.  Parts supply after product discontinuation 

This produc

t may be subject to discontinuation or change for improvement without any prior 

notice.    After the discontinuation of the product, Yoshitake supplies the repair parts for 5 

years otherwise individually agreed. 

 

3.  This warranty does not cover the damage due to any of below: 

(1) 

Valve seat leakage or malfunction caused by foreign substances inside piping. 

(2) 

Improper handling or misuse. 

(3)  Improper supply conditions such as abnormal water pressure/quality. 

(4) 

Water scale or freezing. 

(5) 

Trouble with power/air supply. 

(6) 

Any alteration made by other than Yoshitake. 

(7)  Use under severe conditions deviating from the design specifications

 

(

e.g. in case of corrosion due to outdoor use). 

(8) 

Fire, flood, earthquake, thunder and other natural disasters. 

(9) 

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. 

 

 

 

 

 

 

 

 

 

 

 

 

Summary of Contents for OB-30

Page 1: ...d 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 Conten...

Page 2: ...Pa Material Thermal bulb Copper pipe Nickel chrome plated Capillary tube Copper Flexible tube Stainless steel Standard capillary length 2 m Connection JIS R1 2 screwed Available with thermal well stai...

Page 3: ...Nominal Size d L Weight kg Capillary length Weight 15A Rc 1 2 75 2 1 2 m 0 6 kg 20A Rc 3 4 80 2 2 25A Rc 1 90 2 4 OB 30U OB 31U OB 30U OB 31U Body mm Sensor Nominal Size d L Weight kg Capillary lengt...

Page 4: ...lve When the temperature of the bulb lowers the downward force applied to the spindle by the spring 11 opens the valve The set temperature can be adjusted by turning the handle 12 to change the load o...

Page 5: ...orce to the spindle 7 to open the valve When the temperature of the bulb lowers the downward force applied to the spindle by the spring 11 closes the valve The set temperature can be adjusted by turni...

Page 6: ...P2 and steam flow rate are 0 2 MPa 0 15 MPa and 20 kg h respectively first find intersection point a of the inlet pressure of 0 2 MPa and the outlet pressure of 0 15 MPa Trace down vertically from th...

Page 7: ...re and flow rate are 0 3 MPa 0 15 MPa and 1 m3 h respectively first find intersection point a of the differential pressure P of 0 15 MPa 0 3 MPa 0 15 MPa before and after the valve and the flow rate o...

Page 8: ...Failure to follow this notice hampers correct temperature regulation 11 Do not apply excessive load torque or vibration to the product Failure to follow this notice may result in malfunction or a dra...

Page 9: ...lve Capillary tube 5 4 Assembly of body and sensor Place the bellows follower 13 which is packaged with the body into the bellows 14 with its flat surface facing downward and then screw it into the lo...

Page 10: ...r hammer and can heavily damage the main parts of the product Be sure to follow the procedure below 1 Close the stop valves at the inlet and outlet sides of the product Open the bypass stop valve and...

Page 11: ...t us to retighten the gasket or disassemble the product to replace the part 2 Balance bellows 6 is damaged 2 Please contact us to disassemble the product and replace the part OB 31 OB 31U Trouble Caus...

Page 12: ...hock to the thermal bulb Warning Inspection must be done by experienced professional or valve manufacturer Completely discharge the pressure inside of the product piping and equipment prior to disasse...

Page 13: ...improvement without any prior notice After the discontinuation of the product Yoshitake supplies the repair parts for 5 years otherwise individually agreed 3 This warranty does not cover the damage d...

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