Precautions During Installation - Yoshitake GP-1000 Installation & Operation Manual

6.2 Precautions during installation

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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.
※Failure to do so may result in burns.
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Caution
(1) Do not disassemble the valve unreasonably.
※ Disassembling the valve at your discretion may affect the original performance.
(2) Remove foreign matter and scales from the lines before connecting the valve.
※ Failure to do so may prevent the valve from functioning correctly.
(3) Install a strainer (Recommendation: 100-mesh or close) at the valve inlet side.
※ Failure to do so may hamper correct pressure control, which affects the original
performance.
(4) Install a safety valve at the valve outlet sides as safety device for equipment.
※ Failure to do so prevents problem identification, resulting in equipment damage.
(5) Install a pressure gauge at both the inlet and outlet sides of the 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 so may result in malfunction or drastically shortened service life.
(8) When pressure reducing in two stages, secure at least 3 m between the valves.
※ Failure to do so may result in malfunction, affecting the original performance.
(9) Install the valve in proper
※ Failure to do so may affect the original performance.
(10) Do not apply excessive load, torque or vibration to the valve.
※ Doing so may result in malfunction or drastically shortened service life.
(1) Install the valve perpendicularly to horizontal lines.
(2) Provide the by-pass line. (See 6.1 Example of piping)
(3) When the pressure-reducing ratio is large, install a reducer to keep the flow velocity in the pipe
below 30 m/s or less.
(4) Provide space on the top and bottom of the valve so that the valve can be easily disassembled
and inspected. (See Fig.1)
direction of the fluid flow.
Fig.1
-7-
(mm)
Nominal
A B
size
15A
125
20A 315
25A 135
32A
335 155
40A
50A 345 175
65A 355 190
80A 375 225
100A 395 265
■EPDT-081a■