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Yoshitake GP-1200 Installation And Operation Manual

Pressure reducing valve
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PRESSURE REDUCING VALVE
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. --------
This symbol indicates a potentially hazardous situation that, if not
    Warning
avoided, could result in death or serious injury.
This symbol indicates a hazardous situation that, if not avoided, may
    Caution
result in minor or moderate injury. ("Caution" may also be used to
indicate other unsafe practices or risks of property damage.)
1. Features ･････････････････････････････････････････････････････ 1
2. Specifications ････････････････････････････････････････････････ 1
3. Dimensions and Weights･････････････････････････････････････ 2
4. Operation ････････････････････････････････････････････････････ 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
6.1 Example of piping ････････････････････････････････････････ 6
6.2 Precautions during installation ････････････････････････････ 7
7.1 Precautions during operation ･････････････････････････････ 8
7.2 Adjustment procedures ･･･････････････････････････････････ 8
8.1 Troubleshooting ･･････････････････････････････････････････ 9
8.3 Disassembly･････････････････････････････････････････････ 10
8.4 Precautions during reassembly ･･････････････････････････ 11
8.5 Exploded drawing ･･･････････････････････････････････････ 12
After Sale Service
Model GP-1200&GP-1210
Installation & Operation Manual
Contents
chart line ･････････････････････････････ 3
■EPDT-101■

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Summary of Contents for Yoshitake GP-1200

  • Page 1: Table Of Contents

    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. ――――――――...

  • Page 2: Features

    2.0 MPa l Stainless steel main components (piston & cylinder) are also available. (GP-1200S,1210S) l Stainless steel type is also available for GP-1200 [15-50A]. (GP-1200SS: Wetted parts stainless steel)  Caution (1) Please collate with attached nameplate and specification of ordered model.

  • Page 3: Dimensions And Weights

    3. Dimensions and Weights • ＧＰ－1200 Rc1/4 Air loading  pressure port (㎜) Ｌ Ｈ Ｈ Size Weight（kg） １ 10.0 14.0 14.5 20.0 30.0 35.0 100A 52.5 • ＧＰ－1210 Rc1/4 Air loading  pressure port (㎜) Ｌ Ｈ Ｈ Size Weight（kg） １ Rc 1/2 Rc 3/4 Rc 1...

  • Page 4: Operation

    4. Operation Rc1/4 Air loading  pressure port Parts name Body Pilot diaphragm Main valve Main valve seat Piston Cylinder Pilot valve Pilot valve seat Strainer Inlet press. passage Reduced press. Sensing port Diaphragm chamber Air chamber The pressure reducing valve reduces pressure by the throttling the valve. The valve is composed of the main valve and main valve seat for throttling, and air pressure control space, diaphragm, pilot valve, and piston for pressure sensing and activation.

  • Page 5: Specifications Selection Chart

    5.2 Pressure reducing valve specification selection chart Controllable range (A) Find the intersection point of the inlet and reduced pressures. The GP-1200 (1210) valves are suitable within range (A). When within Maximum performance range (B), maximum performance is impossible within cannot be obtained. this range (B) Reduced pressure  MPa 5.2 Safety valve setting pressure chart...

  • Page 6: Nominal Size Selection Chart

    5.4 Nominal size selection chart  1.0  0.9  0.8  0.7  0.6  0.5  0.4  0.3  0.2  0.1 Nominal  0  0  size 100A [Ex.1] For example, take a pressure reducing valve whose inlet pressure (P ) is 0.6 MPa, reduced pressure (P is 0.4 MPa, flow rate 800 kg/h. First, find the point of intersection (A) of inlet pressure 0.6 MPa and reduced pressure 0.4 MPa.

  • Page 7: Nominal Size Selection Calculation Formula

    6.1 Example of piping Non-return valve Standard unit By-pass stop valve Relief pipe Pressure Pressure gauge gauge Safety Drain separator valve DS-1 Reducer Strainer Stop Stop valve GP-1200 valve Pressure reducing valve Stop valve Stop Sight glass valve 1810 Blow Trap ■EPDT-101■ ‑6‑...

  • Page 8: Precautions During Installation

    6.2 Precautions during installation  Warning (1) Because of heavy weight, hold the valve with lifting equipment while piping. Refer to “3. Dimensions and Weights” table for the valve weight. ※Failure to do so may result in injury due to dropping the valve. (2) In case installing safety valve as safety device at outlet side, joint relief pipe at outlet of safety valve and guide it to safety place where steam can relief out.

  • Page 9: Operating Procedure

    7. Operating Procedure 7.1 Precautions during operation  Warning (1) Do not touch the valve directly with bare hands. ※Doing so may result in burns. (2) Before flow the steam in pipe line, make sure steam can flow without any dangerous at the end of pipe line and pipe line is connected tightly.

  • Page 10: Maintenance Procedure

    8. Maintenance Procedure 8.1 Troubleshooting Problem Cause Solution 1．  Incorrect pressure is being used. 1． Correct the pressure. 2． Strainer [26] is clogged. 2． Disassemble and clean the strainer. 3． Foreign matter exists between 3． Disassemble and remove the foreign piston [12] and cylinder [13]. matter.

  • Page 11: Precautions During Maintenance And Inspection

    8.2 Precautions during maintenance and inspection  Warning (1)Completely discharge internal pressure from the valves, lines, and equipment, and cool the valve down to a level where you can touch it with bare hands before disassembly and inspection. And set operating air pressure to no-pressure. ※Failure to do so may result in injury or burns due to residual pressure or spillage around the valve.

  • Page 12: Precautions During Reassembly

    8.4 Precautions during disassembly  Caution (1) Check that there is no damage and scratches on the main valve, main valve seat, pilot valve, and pilot valve seat. ※  A ny scratches at sealing surface lead to increase in secondary pressure. When any scratches are identified at main valve and seat, polish them away.

  • Page 13: Exploded Drawing

    8.5 Exploded drawing Parts with in the flame are consumable. Please contact us for purchase of these consumable parts. № Name of parts Replace period Diaphragm 2 years Piston ring 3 years Inner ring 3 years Pilot valve assembly 5 years 17･18 Gasket 5 years...

This manual is also suitable for:

Gp-1210

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