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GB/T 21403-2008: Irrigation equipment -- Differential pressure Venturi-type liquid additive injectors
Status: Valid
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 21403-2008 | English | 174 |
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Irrigation equipment -- Differential pressure Venturi-type liquid additive injectors
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GB/T 21403-2008
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Basic data | Standard ID | GB/T 21403-2008 (GB/T21403-2008) | | Description (Translated English) | Irrigation equipment -- Differential pressure Venturi-type liquid additive injectors | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | B91 | | Classification of International Standard | 65.060.35 | | Word Count Estimation | 9,962 | | Date of Issue | 2008-02-03 | | Date of Implementation | 2008-07-01 | | Quoted Standard | GB/T 2828.1-2003; GB/T 7306.1-2000 | | Adopted Standard | ISO 15873-2002, IDT | | Regulation (derived from) | National Standard Approval Announcement 2008 No.2 (Total No.115) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the " Venturi differential pressure liquid additive injectors " design, operating instructions and test methods. This " Venturi differential pressure liquid additive injectors " is a system of irrigation systems used to inject soluble chemicals, including liquid fertilizer, water-soluble liquid fertilizer, acids, corrosive melt, pesticides, herbicides and other liquid additives. This standard does not contain the drinking water supply system backflow prevention device, close venturi ejector mounting apparatus is contained in a waterproof measure Conditions. | GB/T 21403-2008: Irrigation equipment -- Differential pressure Venturi-type liquid additive injectors
---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.
Irrigation equipment. Differential pressure Venturi-type liquid additive injectors
ICS 65.060.35
B91
National Standards of People's Republic of China
GB/T 21403-2008/ISO 15873.2002
Irrigation equipment
Venturi differential pressure liquid addition ejector
(ISO 15873.2002, IDT)
Posted 2008-02-03
2008-07-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard is identical with ISO 15873.2002 "irrigation equipment Venturi differential pressure liquid addition ejector" (in English).
This standard is equivalent to translate ISO 15873.2002.
For ease of use, in the use of ISO 15873.2002, the editorial changes made the following.
--- "This International Standard" be replaced by "this standard";
--- Deleted international standards foreword;
--- Of ISO 15873.2002 and other international standards referenced in our country who have been adopted as a standard by our standards instead of the corresponding
International standards;
--- With a decimal point "." Instead of a comma as the decimal point "."
The standard proposed by China Machinery Industry Federation.
This standard by the National Standardization Technical Committee of agricultural machinery.
This standard was drafted. Technical Research Center of Fluid Machinery Engineering, Jiangsu University, Chinese Academy of Agricultural Mechanization Sciences.
The main drafters of this standard. Wang Yang, Zhang Xian Sheng Yuan Shou it, Li, Tang Yue, Wei Dong.
This standard was first formulated.
GB/T 21403-2008/ISO 15873.2002
Irrigation equipment
Venturi differential pressure liquid addition ejector
1 Scope
This standard specifies the "Venturi differential pressure liquid addition ejector" design, operating instructions and testing methods. This "differential pressure venturi
Add liquid ejector "is the irrigation system to the system used to inject soluble chemicals, including liquid fertilizers, water-soluble liquid fertilizers, acids,
Corrosive solutions, insecticides, herbicides, and other liquid additive. This standard does not contain the drinking water supply system backflow preventer device, then
Near Venturi ejector mounting device is included in the waterproofing Conditions.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 2828.1-2003 Sampling procedures for inspection - Part 1. by acceptance quality limit (AQL) retrieval batch test sample
Programme (ISO 2859-1.1999, IDT)
GB/T 7306.1-2000 55 ° sealing pipe thread - Part 1. the inner cylindrical thread and taper external thread (eqv ISO 7-1.1994)
3 Terms and Definitions
The following terms and definitions apply to this standard.
3.1
Solution of liquid additive or additive-containing solid solubility.
3.2
Irrigation water used to flow through the injection pressure additive (full pipe flow or pipe flow side) imported into the device, the compression of water in this process so that
Intraluminal fluid velocity increases, the pressure decreases, so that the injection of the additive into the suction port after mixing mainstream and import flows.
3.3
In a given inlet and outlet pressures, the liquid additive is injected into the main stream flow rate.
3.4
Volume mainstream volume and volume of the additive and the ratio of the injected additive.
Example. Add 1L to 99L water additives, the concentration of injection is available.
1/(1 + 99) = 1/100 = 0.01
3.5
Venturi add fertilizer ejector inlet flow rate of water for irrigation, or flow through the ejector side and its opposite side of duct velocity (if this
GB/T 21403-2008/ISO 15873.2002
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