Pump Technology| P123 | Pump class, type, feature and use |
Classified by 「American Petroleum Institute」 API 610. |
| P122 | Pump shutoff operation | Shutoff operation must be avoided. |
| P121 | Relationship between pump performance curve and its operating point | Whether the discharge valve is open or shut, the route that reaches the operating point by starting the pump is different. |
| P120 | Relationship between pump total head and discharge pressure | The discharge pressure of a pump is not the same as the value in which the total head shown in the performance curve of the pump is converted into pressure. |
| P119 | Vent before a horizontal pump starts | The pump must pull out all the air in the pump before it starts. |
| P118 | Pump suction strainer | Though a pump suction strainer is installed just before pump suction, it is not always necessary |
| P117 | Pump design standard | International standard and domestic standarad |
| P116 | Performance of impeller cut | Performance when impeller cut is changed as the file. |
| P115 | Pump type | Pump types are by API 610 (ISO 13709). |
| P114 | Patent application number on centrifugal pumps | It is a result of investigating the patent application numbers of domestic pump companies. |
| --- | Heat countermeasures to bearings on high temperature pumps | It is open to the public by patent proposal No. 2008-14224 in Japan. |
| P113 | Example of improving efficiency and total head | It is an example of reducing the clearance between wearing and impeller. |
| --- | Design of low Ns impeller | It is open to the public by patent proposal No. 2007-239674. |
| P111 | Trend of JIS (Pumps) | Three design standards had already issued. |
| P109 | Range that can be driven | Within the range of NPSH3<NPSHA, the pump can be driven. |
| P108 | NPSH3 curve | The tendency of NPSH3 changes by Ns. |
| P107 | NPSHA | NPSHA can be assumed by the calculation. |
| P106 | Relationship between NPSH3 and NPSHA | NPSH3 is an inherent value to the pump. NPSHA is decided by piping etc. around the pump. |
| P105 | Relationship between various losses and Ns | The leakage loss and the disc friction loss change by Ns among four factors. |
| P104 | Factor to decide efficiency | In general, loss evaluates separately for four factors. |
| P103 | Expected pump efficiency | Efficiency decreases so that the smaller Ns is, the smaller the size of the pump is. |
| P102 | Characteristics of performance curve | Performance characteristics of a pump change by Ns. |
| P101 | Specific speed Ns | It becomes rough ideas of the the characteristic, efficiency, and easiness of manufacturing a pump. |