GB/T 21403-2008 English PDF

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GB/T 21403-2008: Irrigation equipment -- Differential pressure Venturi-type liquid additive injectors
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 21403-2008	174	Add to Cart	3 days	Irrigation equipment -- Differential pressure Venturi-type liquid additive injectors	Valid

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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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