ISO 10770-2:2012 油圧作動油パワー—電気的に変調された油圧制御バルブ—パート2：3ポート方向流制御バルブの試験方法 | ページ 2

Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO 10770-2 was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee SC 8, Product testing.

This second edition cancels and replaces the first edition (ISO 10770-2:1998) which has been technically revised.

ISO 10770 consists of the following parts, under the general title Hydraulic fluid power — Electrically modulated hydraulic control valves:

• Part 1: Test methods for four-port directional flow-control valves
• Part 2: Test methods for three-port directional flow-control valves
• Part 3: Test methods for pressure control valves

Introduction

This part of ISO 10770 has been prepared with the intention of improving the uniformity of valve testing and hence the consistency of recorded valve performance data so that this data can be used for system design, regardless of the data source.

1 Scope

This part of ISO 10770 describes methods for determining the performance characteristics of electrically modulated hydraulic three-port directional flow-control valves.

This type of electrohydraulic valve controls the direction and amount of hydraulic flow in a hydraulic system.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.