Yoshitake GPK-2001 Installation & Operation Manual Download Page 19

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EPDT-098a

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-18-

7.5 Exploded drawing

The parts name shown in the rectangle boxes are available as consumable supply.

* Apply lubricant agent for heat/steam resistance (recommendation: SOLVEST No.110 paste,
STT Inc.) to the bottom seal area of the pilot diaphragm and the top and bottom seal area of the
main diaphragm.

Summary of Contents for GPK-2001

Page 1: ...Nominal size selection calculation formula 10 5 Installation 5 1 Precautions for installation 11 5 2 Installing accessories 11 5 3 Piping before and after the pressure reducing valve 12 5 4 Example o...

Page 2: ...sure 0 05 0 9 MPa JIS Rc JIS 20K 0 05 0 85 MPa JIS 10K 0 2 1 4 MPa JIS Rc JIS 20K 0 2 0 85 MPa JIS 10K 85 or less of inlet pressure gauge pressure System air pressure Refer to Standard Loading pressur...

Page 3: ...nal Size Screw JIS Rc Flanged JIS 20K RF d L H H1 A Weight kg L H H1 A Weight kg 15A Rc 1 2 150 335 170 200 14 0 146 335 170 200 15 5 20A Rc 3 4 150 335 170 200 14 0 146 335 170 200 16 0 25A Rc 1 160...

Page 4: ...17 5 146 353 170 200 19 5 25A Rc 1 160 359 175 226 22 0 156 359 175 226 24 5 32A Rc 1 1 4 180 389 192 226 25 0 176 389 192 226 27 5 40A Rc 1 1 2 180 389 192 226 25 0 196 389 192 226 28 0 50A Rc 2 230...

Page 5: ...e Seat 23 Pilot Diaphragm 23 2 Air pressure sensing port 33 Tee 34 35 36 Pipe A B C 12 1 Main diaphragm chamber 23 1 Pilot diaphragm chamber 56 1 Reduced pressure sensing port 1 When the pressure redu...

Page 6: ...36 This fluid also flows to the reduced side of the body 1 through the orifice of tee 33 and pipe 35 that connects to the body Fig 2 3 When the flow rate at the pilot valve exceeds the flow rate at th...

Page 7: ...agm receives the reduced pressure to be balanced with the air pressure The pilot valve travel is controlled by the air pressure and pressure applied to the pilot diaphragm due to variations in reduced...

Page 8: ...m performance cannot be obtained When reducing pressure in two stages maximize the distance between the valves at least 3 m 4 2 Safety valve setting pressure chart This chart is for setting the safety...

Page 9: ...sidering pressure loss and heat loss of the gate valve and the strainer before and after the pressure reducing valve To fully utilize the flow characteristics of the valve do not select a small pipe s...

Page 10: ...6 MPa reduced pressure P2 0 4 MPa flow rate 600 kg h When determining the nominal size find the point of intersection A of inlet pressure 0 6 MPa and reduced pressure 0 4 MPa Vertically proceed from p...

Page 11: ...pressure reducing valve is calculated under the following conditions Nominal size 15A saturated steam Inlet pressure of 0 6 MPa 0 7 MPa A Reduced pressure of 0 4 MPa 0 5 MPa A you can find that Cv va...

Page 12: ...alve from functioning 5 Do not connect the sensing pipe close to valves and elbows Choose the position with the least vibration Recommended straight length 10 times the line pipe diameter Failure to d...

Page 13: ...stall 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 5 When installing quick open and clos...

Page 14: ...is long the operating pressure set pressure basic diagram will deviate slightly In such cases change the operating pressure to achieve the required set pressure Standard operating circuit The standar...

Page 15: ...ng screw to set pressure Incorrect adjustment may cause hunting water hammer etc resulting in damage to the valve and other equipment See 5 4 Example of piping 1 Check that all stop valves V1 to V7 ar...

Page 16: ...in valve seat 12 or scratches exist 4 Foreign matter exists between pilot valve and pilot valve seat or scratches exist 5 Orifice of tee 33 is clogged 6 Reduced pressure is not adjusted correctly 7 Fo...

Page 17: ...and remove all foreign matter and scales via the by pass line before operation Failure to do so may prevent the valve from functioning correctly 4 Remove condensate completely from the line and close...

Page 18: ...ange the parts if scratches still exist after polishing Also in case any scratches are identified at pilot valve and pilot valve seat change into pilot valve assembly 2 Move the sliding section pilot...

Page 19: ...n in the rectangle boxes are available as consumable supply Apply lubricant agent for heat steam resistance recommendation SOLVEST No 110 paste STT Inc to the bottom seal area of the pilot diaphragm a...

Page 20: ...EPDT 098a 19...

Page 21: ...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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Yoshitake GPK-2001, Installation & Operation Manual

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