GB/T 7021-2019 English PDF

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GB/T 7021-2019: Glossary of terms for centrifugal pump
Status: Valid

GB/T 7021: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 7021-2019	999	Add to Cart	7 days	Glossary of terms for centrifugal pump	Valid
GB/T 7021-1986	RFQ	ASK	5 days	Glossary of terms for centrifugal pump	Obsolete

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Basic data

Standard ID: GB/T 7021-2019 (GB/T7021-2019)
Description (Translated English): Glossary of terms for centrifugal pump
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J71
Classification of International Standard: 23.080
Word Count Estimation: 50,527
Date of Issue: 2019-10-18
Date of Implementation: 2020-05-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 7021-2019: Glossary of terms for centrifugal pump

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Glossary of terms for centrifugal pump ICS 23.080 J71 National Standards of People's Republic of China Replace GB/T 7021-1986 Centrifugal pump terminology Published on.2019-10-18 2020-05-01 implementation State market supervision and administration China National Standardization Administration issued

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 7021-1986 "Grozen Pump Terminology". Compared with GB/T 7021-1986, the main technical changes of this standard are as follows. --- Revised scope (see Chapter 1, Guideline for the 1986 edition); --- Added two classifications according to the principle of "divided by the working principle" and "pressing the water chamber type" (see 2.1, 2.2); ---Modified "slewing power pump", "centrifugal pump", "vortex pump", "radial section", "axial section", "single stage", "multi-stage", "extraction type" Definition of classification terms such as suction type "submersible pump", "shielded electric pump", "boiler feed pump", "circulating water pump" and "booster pump" (see 2.1.1) 2.1.1.1, 2.1.1.2, 2.4.1, 2.4.2, 2.5.1, 2.5.2, 2.9.5~2.9.8, 2.11.1, 2.11.3, 2.11.20, 1.1 of the 1986 edition, 1.1.1, 1.1.2, 1.3.1, 1.3.2, 1.4.1, 1.4.2, 1.8.5~1.8.8, 1.10.1, 1.10.3, 1.10.19); --- Modified the Chinese and English names of the classification terms such as "radial sectioning", "axial sectioning" and "submersible pump" (see 2.4.1, 2.4.2, 2.9.7, 1.3.1, 1.3.2, 1.8.7) of the 1986 edition; --- Added classification terms such as "foot support", "magnetic drive pump" and "liquefied natural gas pump" (see 2.7.1, 2.9.9, 2.11.19); ---Modified "Head" "Export Total Head" "Inlet Total Head" "Cavitation Head" "Flow" "Rated Flow" "Speed" "Pump Output Power" English name for performance and design terms such as “pump input power”, “driver input power”, “pump NPSH curve” (see 3.4, 3.9, 3.10, 3.17, 3.26~3.31, 3.50, 1986 editions 2.4, 2.9, 2.10, 2.17, 2.26~2.31, 2.50); ---Modified the performance and design terminology of "closed lift", "rated flow", "pump output power", "pump input power", "pump maximum efficiency" Symbols (see 3.5, 3.27, 3.29, 3.30, 3.38, 1986 editions 2.5, 2.27, 2.29, 2.30, 2.38); ---Modified "Heaven", "Closed Lift", "Specified Lift", "Exhaust Pressure", "Sucking Pressure", "Cavitation Margin", "Effective Cavitation Balance" Need NPSH "" specific number of revolutions" "cavitation ratio revolutions" "type number" "flow" "rated flow" "speed" "pump output power" "pump input Power" "driver input power" "pump efficiency" "mechanical efficiency" "volume efficiency" "hydraulic efficiency" "unit efficiency" "pump most efficient "" pump NPSH curve" "axial force" "radial force" and other properties, design terms (see 3.4~3.6, 3.11, 3.12) 3.17~3.19, 3.23~3.32, 3.34~3.38, 3.50, 3.66, 3.67, 1986 version 2.4~2.6, 2.11, 2.12, 2.17~ 2.19, 2.23~2.32, 2.34~2.38, 2.50, 2.66, 2.67); --- Increased performance, design term "NPSH3" (see 3.20); --- Removed performance and design term "critical eclipse margin" (see 2.20 of the 1986 edition); ---Modified the performance of "flow", "rated flow", "speed", "pump input power", "driver input power", "pump NPSH curve", The Chinese name of the design term (see 3.26~3.28, 3.30, 3.31, 3.50, 1986 version 2.26~2.28, 2.30, 2.31) 2.50); --- Modified the calculation formula of "lift factor" (see 3.62, 2.62 of the 1986 edition); ---Modified the definition of operation and test terminology such as "automatic operation" and "series operation" (see 4.1, 4.10, 3.1, 3.10 of 1986 edition); ---Modified the Chinese name of the operation and test term such as "local operation", "remote operation", "closed-point operation", "water hammer test" (see 4.6, 4.7, 4.11, 4.23, 1986, 3.6, 3.7, 3.11, 3.22); --- Increased operation, test term "cold pump" (see 4.15); ---Modified "housing", "drainage shell", "pressing out shell", "pressing out the elbow", "inhaling the bell tube", "balanced disc", "balance drum", "throat bushing", etc. Definition of terms and parts terms (see 5.1.1, 5.1.4, 5.1.5, 5.1.8, 5.1.12, 5.4.13, 5.4.14, 5.6.8, 1986 edition) 4.1.1, 4.1.4, 4.1.5, 4.1.8, 4.1.12, 4.4.13, 4.4.14, 4.6.8); ---Modified the Chinese name of the parts and parts such as "pressing out the shell", "pressing out the elbow", "non-blocking impeller", "throat bushing" and "pressure outlet" (See 5.1.5, 5.1.8, 5.3.4, 5.6.8, 5.7.5, 1986 editions 4.1.5, 4.1.8, 4.3.4, 4.6.8, 4.7.5); ---Modified the English name of the terms such as "impeller seal ring", "vane" and "shell seal ring" (see 5.3.5, 5.6.1, 5.6.4, 4.3.5, 4.6.1, 4.6.4) of the 1986 edition; --- Added terms and parts such as "filler seal" and "sub-impeller seal" (see 5.5.1, 5.5.5); --- Added hydraulic terms such as "density" and "specific energy" (see 6.1, 6.8); --- Revised the Chinese name of hydraulic terms such as "dynamic viscosity" and "motion viscosity" (see 6.2, 6.3, 5.1, 5.2 of 1986); --- Revised the English name of the hydraulic term "dynamic viscosity" (see 6.2, 5.1 of the 1986 edition); --- Revised the definition of hydraulic terms such as "dynamic viscosity", "motion viscosity", "pressure", "water head" and "total head" (see 6.2, 6.3, 6.4, 6.9, 6.13, 5.1, 5.2, 5.3, 5.7, 5.11 of the 1986 edition; ---Modified units of various quantities are units of the International System of Units. This standard was proposed by the China Machinery Industry Federation. This standard is under the jurisdiction of the National Pump Standardization Technical Committee (SAC/TC211). This standard was drafted. Shenyang Pump Research Institute, Shanghai Kasby Pump Co., Ltd., New Territories Pump Group Co., Ltd., Guangdong Kenfu Lai Pump Co., Ltd., Hefei Xinhu Shielding Pump Co., Ltd., Shandong Shuangneng Co., Ltd., Shanghai Kaiquan Pump Industry (Group) Co., Ltd. Division, Jialite Liaoyuan Pump Co., Ltd., Hunan Xiangdian Changsha Pump Co., Ltd., Hangzhou Alkali Pump Co., Ltd., China Power Construction Group Shanghai Energy Equipment Co., Ltd., Hefei University of Technology, Shandong Jinggong Pump Co., Ltd., Shenyang Blower Group Nuclear Power Pump Co., Ltd. The main drafters of this standard. Yu Hongchang, Pan Zaibing, Xu Mintian, Liu Guangqi, Wang Guoliang, Wang Jiabin, Gao Hongyu, Qu Jingtian, Li Pujiang, Li Jinfu, Lin Yongxiang, Yan Bin, Li Juan, Zhang Yong, Dong Qinmin. The previous versions of the standards replaced by this standard are. ---GB/T 7021-1986. Centrifugal pump terminology

1 Scope

This standard defines common terminology and related hydraulic terms and definitions for centrifugal pumps. This standard applies to centrifugal pumps, other pumps can be used as reference.

2 classification

2.1 According to the working principle 2.1.1 Rotary power pump rododynamicpump By relying on the rotation of the impeller to obtain speed and pressure, the mechanical energy is converted into a machine that delivers liquid energy. 2.1.1.1 Centrifugal pump centrifugalpump Relying on the centrifugal force generated when the impeller rotates at a high speed, the energy is transmitted to the liquid, and the flow direction of the impeller outlet is substantially perpendicular to the pump shaft. Power pump. 2.1.1.2 Vortex pump regenerativepump; vortexpump A power pump that transfers energy to a liquid by means of a swirling motion generated by the impeller at high speed rotation in the vane and pump flow path (see Figure 1, Figure 2). Figure 1 General single-stage vortex pump ......

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