Installation; Example Of Piping; Precautions During Installation - Yoshitake GD-30 Installation & Operation Manual

6.

Installation

6.1 Example of piping

6.2 Precautions during installation

 Warning
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.
 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 result in the valve from functioning incorrectly.
(3) Install a strainer (Recommendation: 60-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 cannot identify PRV problem, 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 direction of the fluid flow.
※ 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.
(11) Install the valve perpendicularly to horizontal lines.
(12) Provide the by-pass line. (See 6.1 Example of piping)
(13) Set pressure of safety relief valve should be higher than the pressure reducing valve's pressure.
(14) When the reducing ratio is large, install a reducer to keep the flow velocity in the pipe 20 m/s to
30 m/s .
4 ■PDT－136a■