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TEMPERATURE REGULATOR
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. Specifications ···························································· 1
2. Dimensions and Weights ············································· 2
3. Operation ································································· 3-4
4. Nominal Size Selection ··············································· 5-6
OB-30, OB-30U
MODEL
OB-31, OB-31U
INSTRUCTION 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.
5.1 Precaution for installation ······································· 7
5.2 Installation of body ··············································· 7
5.3 Installation of thermal bulb ····································· 7
5.4 Assembly of body and sensor ································· 8
5.5 Piping example ···················································· 8
6.1 Precaution for operation ········································ 9
6.2 Adjustment ························································· 9
7.1 Troubleshooting ·················································· 10
7.2 Precaution for inspection ······································ 11
Table of Contents
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■EPDT-213b■
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Summary of Contents for Yoshitake OB-30
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Page 1: Table Of Contents
TEMPERATURE REGULATOR INSTRUCTION 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: Specifications
1. Specifications ■ Body OB-30 OB-30U OB-31 OB-31U Model Purpose For heating For cooling Application Steam, Hot water Cold water, Refrigerant Maximum pressure 1.0 MPa (1.7 MPa for hot water) 1.7 MPa Max. differential pressure 1.0 MPa Valve seat leakage 0.05% or less of rated flow... -
Page 3: Dimensions And Weights
2. Dimensions and Weights ■ OB-30, OB-31 OB-30 OB-31 (mm) • Body • Sensor Nominal Size Weight (kg) Capillary length Weight Rc 1/2 0.6 kg Rc 3/4 Rc 1 ■ OB-30U, OB-31U OB-30U OB-31U (mm) • Body • Sensor Nominal Size... -
Page 4: Operation
3. Operation OB-30, OB-30U ■ Part name 1 Body 2 Spring chamber 3 Disc 4 Valve 5 Valve seat 6 Balance bellows 7 Spindle 8 Nut 9 Guide 10 Guide 11 Spring 12 Handle 13 Bellows follower 14 Bellows 15 Ring... - Page 5 OB-31, OB-31U ■ Part name 1 Body 2 Spring chamber 3 Disc 4 Valve 5 Valve seat 6 Balance bellows 7 Spindle 8 Nut 9 Guide 10 Guide 11 Spring 12 Handle 13 Bellows follower 14 Bellows 15 Ring 16 Gasket OB-31 17 Bolt 18 Bushing...
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Page 6: Nominal Size Selection
4. Nominal Size Selection ■OB-30, OB-30U [For steam] <How to use the chart> When selecting the nominal size of a temperature regulator whose inlet pressure (P1), outlet pressure (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. - Page 7 ■OB-31, OB-31U [For water] <How to use the chart> When selecting the nominal size of a temperature regulator whose inlet pressure, outlet pressure, and flow rate are 0.3 MPa, 0.15 MPa, and 1 m /h, respectively, first find intersection point (a) of the differential pressure (ΔP) of 0.15 MPa (0.3 MPa –...
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Page 8: Installation
5. Installation 5.1 Precaution for installation Caution 1. Do not disassemble the product unless it is necessary. * Disassembly may prevent the product from functioning properly. 2. Be sure to remove foreign substances and scale from the piping before connecting the product. * Foreign substances and scale may prevent the product from functioning properly. -
Page 9: Assembly Of Body And Sensor
“L” position. Be sure not to lose the bellows follower because the product does not function properly without Ring [15] Bellows [14] 5.5 Piping example Safety ■OB-30, OB-30U (for heating) relief valve Hot water Thermometer OB-30 Temperature... -
Page 10: Operating Procedure
3. Slowly open the inlet stop valve to its full open position, and then, open the outlet stop valve little by little to its full open position. 4. Adjust the handle till the desired temperature is obtained while watching the thermometer with enough time. [Scale reading and set temperature] OB-30, OB-30U (for heating) Scale reading 0-35°C 25-70°C 40-100°C 60-130°C... -
Page 11: Maintenance
7. Maintenance 7.1 Troubleshooting ■ OB-30, OB-30U Trouble Cause Remedy Temperature does 1. Inadequate adjustment. 1. Readjust according to “8.2 not rise. Adjustment” on page 8. 2. Insufficient drainage from the trap 2. Check the trap and replace it if of heat exchanger, etc. -
Page 12: Precaution For Inspection
7.2 Precaution for inspection Inspection must be done by experienced professional or valve manufacturer. Completely discharge the pressure inside of the product, piping and equipment prior to disassembly and inspection. When fluid is hot, cool down the product to the Warning condition that it can be touched with bare hands. -
Page 13: Warranty Information
( e.g. in case of corrosion due to outdoor use). 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. PDD-046f...