Yoshitake OB-3 Manual Download Page 1

 

EPDT-258a

 

MODEL

 

OB-3,4,3G,4G 

TEMPERATURE REGULATOR VALVE 

 

PRODUCT MANUAL

 

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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 

This  symbol  indicates  a  potentially  hazardous  situation  that,  if  not  avoided, 
could 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 Contents 

 

1. Usage of the Product ·················································· 1 

2. Features ·································································· 1 

3. Specifications ·························································· 1-3 

3.1 Specifications ························································ 2 

  3.2 

Temperature adjusting range

 ······································ 2 

  3.3 Temperature accuracy from set point   ······················ 2-3 

  3.4 Cv value table ························································ 3 

  3.5 

Valve Seat Leakage

 ················································· 3 

4. Dimensions and Weight ············································ 4-6 

5. 

Structure

   ······························································· 7-9 

6. 

Nominal Size Selection Chart

 ··································· 10-11 

7. 

Maintenance and Inspection

 ········································· 12 

  7.1 

Cautions before use 

 ··············································· 12 

  7.2 

Installation of Main Unit

 ············································ 12 

  7.3 Installation of Thermal Tube

 ······································· 13 

  7.4 

Warnings and Cautions for Use

 ·································· 13 

  7.5 

Adjustment Procedures

 ············································ 14 

  7.6 

Example of piping

 ··················································· 14 

  7.7 

Trouble and Corrective Actions

 ··································· 15 

  7.8 Precautions during maintenance and inspection ··········· 16 

  7.9 

How to Disassemble

 ················································ 16 

Handling of Protection Pipe (Option)

   ························· 17-18 

  Warranty Information

 

 

 

 

 

Summary of Contents for OB-3

Page 1: ...derate injury or may result in only property damage Table of Contents 1 Usage of the Product 1 2 Features 1 3 Specifications 1 3 3 1 Specifications 2 3 2 Temperature adjusting range 2 3 3 Temperature...

Page 2: ...pening and closing of valves the accuracy is excellent 4 As the OB 3G and OB 4G types have adopted external pressure bellows their heat resistance is excellent 3 Specifications 3 1 Specifications Mode...

Page 3: ...t a pressure higher than 0 5 MPa with stainless steel trim parts is recommended Available with capillary of up to 5 meter Available with Max temperature inside Valve and valve seat material and bellow...

Page 4: ...A 20A 25A 32A 40A 50A 65A 80A 100A 125A 150A OB 3 3G 2 2 4 7 10 OB 4 2 2 4 7 10 14 21 27 42 72 94 OB 4G 2 2 4 7 10 14 21 27 42 72 3 5 Valve Seat Leakage Unit steam kg h water L h Nominal size 15A 20A...

Page 5: ...m mm Nominal size R l Standard 15A 40A 2000 440 Nominal size d L H H B Weight kg 15A Rc 1 2 148 55 510 160 11 20A Rc 3 4 148 55 510 160 11 25A Rc 1 160 60 520 160 12 32A Rc1 1 4 195 60 520 160 12 40A...

Page 6: ...liquid For air 5 OB 4 15 40A OB 4G 15 40A mm Nominal size L H H B Weight kg 15A 126 60 520 160 15 20A 130 60 520 160 16 25A 140 70 540 160 18 32A 150 75 550 160 21 40A 160 75 550 160 23 mm Nominal si...

Page 7: ...OB 4 OB 4G OB 4 OB 4G OB 4 OB 4G OB 4 OB 4G OB 4 OB 4G 50A 180 110 620 160 29 65A 215 125 650 160 38 80A 260 135 670 160 48 100A 300 160 750 180 58 125A 360 190 810 180 76 150A 382 220 980 220 125 mm...

Page 8: ...24 Bellows 25 Washer of Bellows 26 Spring Plate 27 Bellows Cover 28 Bellows Washer 29 Bellows Nut 30 Guard Metrl Fitting 31 Flexible Tube 32 Flexible 33 Thermal Element Pipe 34 Screw Flange 35 Thermal...

Page 9: ...ew 22 Spring 23 Spindle 24 Bellows 25 Washer of Bellows 26 Spring Plate 27 Bellows Cover 28 Bellows Washer 29 Bellows Nut 30 Guard Metrl Fitting 31 Flexible Tube 32 Flexible 33 Thermal Element Pipe 34...

Page 10: ...Spring 23 Spindle 24 Bellows 25 Washer of Bellows 26 Spring Plate 27 Bellows Cover 28 Bellows Washer 29 Bellows Nut 30 Guard Metrl Fitting 31 Flexible Tube 32 Flexible 33 Thermal Element Pipe 34 Screw...

Page 11: ...et pressure P1 outlet P2 and steam flow rate are 0 3MPa 0 15MPa 9 m3 h respectively first find intersection point a of the differential pressure 0 15MPa 0 3MPa 0 15MPa and the flow rate 9 m3 h Since t...

Page 12: ...utlet P2 and steam flow rate are 0 3MPa 0 15MPa 9 m3 h respectively first find intersection point a of the differential pressure 0 15MPa 0 3MPa 0 15MPa and the flow rate 9 m3 h Since the intersection...

Page 13: ...orrect If there are T marks on the flanges or joint nuts follow the instructions on how to install them Otherwise the temperature cannot be adjusted correctly 10 The bending radius of the lead pipe mu...

Page 14: ...the T mark position See the diagram below showing an example of thermal tube insertion 7 4 Warnings and Cautions for Use Warning 1 In case of high temperature fluid do not touch the product directly...

Page 15: ...the heat resistance temperature the bellows is damaged and the valve shaft bends and becomes unusable 2 Turn the adjustment handle and align the indication board with the desired temperature position...

Page 16: ...ischarge area or recheck the front and the rear of the temperature adjustment valve The temperature excessively increases 1 The adjustment is not correct 2 Foreign substances are caught by the valves...

Page 17: ...Alcohols or specified chlorofluorocarbon is sealed in the thermal tube So when disposing of the products have a waste disposer collect and treat them If you want us to do so we undertake the service a...

Page 18: ...DT 258a 17 8 Handling of Protection Pipe Option 8 1 A set of protection pipes 8 2 Insert a gasket into the protection pipe 8 3 Insert a liquid tube into the protection pipe and screw in a screwing joi...

Page 19: ...T 258a 18 8 4 Fasten the joint nut with a wrench or spanner 8 5 Inject liquid which is the same as the liquid to be heated from the plug hole on the screwing joint side 8 6 Attach the plug after injec...

Page 20: ...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 forei...

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