manualshive.com logo in svg

Yoshitake GP-1200, Installation And Operation Manual

Share
Download
Yoshitake GP-1200 Installation And Operation Manual Download Page 1

■

EPDT-101

■

Model GP-1200&GP-1210

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. 

――――――――

Warning

Caution

Contents

1. Features

･････････････････････････････････････････････････････

1

2. Specifications

････････････････････････････････････････････････

1

3. Dimensions and Weights

･････････････････････････････････････

2

4. Operation

････････････････････････････････････････････････････

3

5. Nominal Size Selection Method

5.1 Standard loading pressure -setting pressure
                                          chart line

･････････････････････････････

3

5.2 Specifications selection chart

･････････････････････････････

4

5.3 Safety valve setting pressure chart

･･･････････････････････

4

5.4 Characteristics chart

･･････････････････････････････････････

4

5.5 Nominal size selection chart

･･････････････････････････････

5

5.6 Nominal size selection calculation formula

････････････････

6

6. Installation

6.1 Example of piping

････････････････････････････････････････

6

6.2 Precautions during installation

････････････････････････････

7

7. Operating Procedure

7.1 Precautions during operation

･････････････････････････････

8

7.2 Adjustment procedures

･･･････････････････････････････････

8

8. Maintenance Procedure

8.1 Troubleshooting

･･････････････････････････････････････････

9

8.2 Precautions during maintenance and inspection

･････････

10

8.3 Disassembly

･････････････････････････････････････････････

10

8.4 Precautions during reassembly

･･････････････････････････

11

8.5 Exploded drawing

･･･････････････････････････････････････

12

After Sale Service

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.)

Summary of Contents for GP-1200

Page 1: ... 4 5 4 Characteristics chart 4 5 5 Nominal size selection chart 5 5 6 Nominal size selection calculation formula 6 6 Installation 6 1 Example of piping 6 6 2 Precautions during installation 7 7 Operating Procedure 7 1 Precautions during operation 8 7 2 Adjustment procedures 8 8 Maintenance Procedure 8 1 Troubleshooting 9 8 2 Precautions during maintenance and inspection 10 8 3 Disassembly 10 8 4 P...

Page 2: ...essure 0 1 1 0 MPa 0 05 0 9 MPa Reduced pressure 90 or less of inlet pressure gauge pressure Loading air pressure See the Standard loading pressure setting pressure chart line P 3 Min differential pressure 0 05 MPa Max pressure reducing ratio 20 1 Max temperature 220 Valve seat leakage 0 01 or less of rated flow Body Ductile cast iron Valve Stainless steel Valve seat Stainless steel Piston Cylinde...

Page 3: ...0A 155 220 64 8 5 25A 160 235 67 10 0 32A 190 258 82 14 0 40A 190 258 82 14 5 50A 220 282 93 20 0 65A 245 292 100 30 0 80A 290 339 122 35 0 100A 330 385 144 52 5 ＧＰ 1210 Size d Ｌ Ｈ Ｈ１ Weight kg 15A Rc 1 2 150 220 64 7 0 20A Rc 3 4 155 220 64 7 0 25A Rc 1 160 235 67 8 5 32A Rc 1 1 4 190 258 82 12 0 40A Rc 1 1 2 190 258 82 12 5 50A Rc 2 220 282 93 18 0 ...

Page 4: ...chamber 44 flexes pilot diaphragm 8 to open the pilot valve 3 Inlet pressure via inlet pressure passage and pilot valve enters the upside of the piston The pressure overrides the pressure on the downside of the main valve and the load of main valve spring to open the main valve The fluid then begins to flow from the inlet side 4 Reduced pressure is led to diaphragm chamber 43 via reduced pressure ...

Page 5: ...aracteristics chart Shut off pressure raise 0 02 MPa or less Offset 0 03 MPa or less Setting pressure 0 05 0 1 MPa 0 05 MPa or less Setting pressure 0 1 0 9 MPa 2 Pressure characteristics chart Reduced pressure is set to 0 1 MPa when inlet pressure is 1 0 MPa The chart indicates a variation in reduced pressure when the inlet pressure is changed from 1 0 to 0 3 MPa Reduced pressure MPa 0 8 0 6 0 4 ...

Page 6: ...intersection C of inlet pressure 0 8 MPa and the diagonal line Move leftward down the diagonal line to intersection point D where the diagonals line intersect with the reduced pressure 0 05 MPa Vertically proceed from point D to come across the flow rate 600 kg h and regard this point as E Point E is between nominal sizes 32A and 40A Select the larger nominal size 40A 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0...

Page 7: ...ure intersection point A at the left chart then draw a horizontal line in the leftward direction to point B which indicates a correction coefficient of 0 85 For a nominal size of 25A the corrected Cv value would be calculated as follows 4 rated Cv value 0 85 correction coefficient 3 4 6 Installation 6 1 Example of piping W Max steam flow rate kg h P1 Inlet pressure MPa A P2 Reduced pressure MPa A ...

Page 8: ...he valve Failure to do so may hamper correct pressure adjustment 6 Install a steam trap to the inlet sides of the valve to prevent drainage problems Failure to do so may result in drainage problem affecting the original performance 7 When installing quick open and close valves such as a solenoid valve install it at inlet side as much as possible and secure at least 3 m from the valve Failure to do...

Page 9: ...and other equipment 4 Remove condensate completely from the line and close the stop valves before and after the valve when not using it for long periods of times Rust generated in the valves and lines may cause malfunction 7 2 Adjustment procedures Follow the steps below and slowly turn the adjusting screw to set pressure Incorrect adjustment may cause hunting water hammer etc resulting in damage ...

Page 10: ...is leaking 6 Diaphragm 5 is damaged 1 Disassemble and remove the foreign matter When any scratches are identified lap the main valve and main valve seat Change the parts if scratches still exist after lapping 2 Disassemble the pilot valve as sembly and clean or replace it 3 Disassemble and remove the foreign matter When any scratches are identified polish them away using a paper Change the parts i...

Page 11: ...by pass line before operation Failure to do so may prevent the valve from functioning correctly 5 When adjusting pressure slowly increase loading air pressure Incorrect adjustment may cause hunting water hammer etc resulting in damage to the valve and other equipment 6 Remove condensate completely from the line and close the stop valves before and after the valve when not using it for long periods...

Page 12: ... valve and pilot valve seat change into pilot valve assembly 2 Move the sliding section pilot valve piston etc two to three times and confirm they move smoothly If the sliding parts do not move correctly it may cause failure problems Working not correctly 3 Replace gaskets with new ones when reassembling If the gasket is used for a long time it may cause steam leakage problem 4 Assemble in the rev...

Page 13: ...4 Piston ring 3 years 15 Inner ring 3 years 17 18 Pilot valve assembly 5 years 22 Gasket 5 years 24 25 Gasket 2 years 26 Strainer 5 years 28 Gasket 2 years 8 Pilot diaphragm 2 years Note Apply a liquid sealant for heat and steam resistant Recommendation NEVER SEEZ Standard grade to the sealing surface of the diaphragm bottom and the top cover and pilot diaphragm top and the cover ...

Reviews:

No comments

Brands by name

Popular brands

Load more brands