SAE J200 Classification System for Rubber Materials
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Product Code:SAE J200
Title:Classification System for Rubber Materials
Issuing Committee:Committee On Automotive Rubber Specs
Scope:This classification system tabulates the properties of vulcanized rubber materials (natural rubber, reclaimed rubber, synthetic rubbers, alone or in combination) that are intended for, but not limited to, use in rubber products for automotive applications.NOTE 1: This document may serve many of the needs of other industries in much the same manner as SAE numbered steels. It must be remembered, however, that this system is subject to revision when required by automotive needs. It is recommended that the latest revision always be used.This document is based on the premise that all rubber materials intended for use in rubber products can be arranged into characteristic designations. These designations are determined by types, based on resistance to heat aging, and classes, based on resistance to swelling by oil. Basic levels are thus established which, together with values describing additional requirements, permit complete description of the quality of all rubber materials.In all cases where provisions of this document would conflict with those of the detailed specifications for a particular product, the latter shall take precedence.NOTE 2: When the rubber product is to be used for purposes where the requirements are too specific to be completely prescribed by this classification system, it is necessary for the purchaser to consult the supplier in advance to establish the appropriate properties, test methods, and specification test limits.
Product Code:SAE J2470
Title:Hydraulic Fluid Power--Valves--Method for Assessing the Lock Sensitivity to Contaminants
Issuing Committee:Ship Fluid Systems Committee
Scope:This SAE Recommended Practice defines a procedure, which will aid in assessing the contaminant sensitivity of hydraulic valves. The approach taken defines a test procedure with flexibility for testing valves in a wide range of contamination levels. The user of this procedure must establish the contamination levels for testing. Three levels are suggested which should cover the range for most valve applications. This procedure does not establish the contaminant sensitivity requirements for any valve. The user of this procedure needs to be aware of the system contamination level that the valve will operate in and select test contamination levels significantly higher than the operating level to assess the suitability of the valve. The test procedure permits a valve to be tested without disassembly and therefore permits protection of proprietary design information.This procedure assesses the contamination sensitivity of valves by contaminant lock. The procedure indicates the sensitivity of valves by contaminant lock due to various sizes of contaminants. The test is designed to assess the contaminant sensitivity of valves in tests of relatively short duration. See Appendix A for guidance as to how the tests and their results may be used.The tests are purposely designed to be severe in order to be applicable to a wide range of contaminated environments. The use of valves in many applications and for various purposes results in differing levels of acceptable performance. That is, the same valve may be unacceptable - in relation to operation in a contaminated environment - in one application and be acceptable in another. The user must make that decision based on a review of the expected level of the specific application and the test results obtained.NOTE - See 7.2 if document is to be contractually invoked.
基本信息
| 标准名称： | 家用缝纫机梭心 |
| 英文名称： | Shuttle bobbins for household sewing machines |
| 中标分类： |
轻工、文化与生活用品 >>
钟表、自行车、缝纫机 >>
缝纫机 |
| 替代情况： | 原标准号GB 4522-1984 |
| 发布部门： | 国家轻工业局 |
| 发布日期： | 1999-04-21 |
| 实施日期： | 1999-04-21 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 1900-01-01 |
| 提出单位： | 国家轻工业局行业管理司 |
| 归口单位： | 全国缝纫机标准化中心 |
| 起草单位： | 上海市缝纫机研究所 |
| 起草人： | 曲建华、沈建新、马起云 |
| 出版日期： | 1999-04-21 |
| 页数： | 3页 |
适用范围
本标准适用于JA, JB型缝纫机的梭心。
前言
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目录
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引用标准
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所属分类： 轻工 文化与生活用品 钟表 自行车 缝纫机 缝纫机