Standard No.:	MT 419-1995
Chinese Name:	液压支架用阀
English Name:
Professional Classification:	J16 Valve
Professional Classification:	MT Professional Standard - Coal
Issued by:
Issued on:	1995-12-05
Implemented on:	2003-03-01
Status:	VALID
Language:	English
File Format:	PDF
Word Count:	9500 words
Price(USD):	285 (USD)
Delivery:	via email in 1-3 business day

1 Subject Content and Application Scope

The standard specifies the classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of hydraulic support valve (hereafter referred as valve) for mining.
The standard is applicable to hydraulic support valve for mining.

2 Normative references

GB 197 General Purpose Screw Threads - Tolerances and Fits (diameter: 1~355mm)
GB 321 Preferred Numbers and Preferred Number Series
GB 699 Quality Carbon Structural Steels - Technical Requirements
GB 1184 Geometrical Tolerancing - Geometrical Tolerance for Features without Individual Tolerance Indications
GB 1220 Stainless Steel Bars
GB 1239.1~1239.5 Ordinary Cylindrical Helical Springs
GB/T 1804 General Tolerances - Tolerances for Linear and Angular Dimensions without Individual Tolerance Indications
GB/T 2878 Fluid Power Systems and Components - Ports - Dimensions and Design
GB 3452.1 Fluid Systems - Sealing Devices - O-rings - Inside Diameters, Cross-sections, Tolerances and Size Identification Code
GB 3452.2 Appearance Quality Acceptance Criteria for Rubber O-rings
GB 3452.3 Fluid Power Systems - O-ring - Design Criteria for O-ring Housing - Basic Calculation
GB 9439 Grey Iron Castings
GB 11352 Cast Carbon Steels for General Engineering Purposes
GB/T 13306 Plates
GB 13319 Geometrical Tolerance - Positional Tolerancing
JB 3338 Cylindrical Helical Compression Springs for Hydraulic Parts - Technical Conditions
MT 76 Emulsion Oil for Hydraulic Support
MT/T 154.1 Model Compilation and Management of Electromechanical Product for Coal mine

3 Terms