GB/T 21283.5-2008Rotary shaft lip-type seals incorporating thermoplastic sealing elements -- Part 5: Identification of visual imperfections (English PDF)

Foreword

GB/T 21283 "sealing elements for the thermoplastic material rotary shaft lip seals" is divided into six sections.

--- Part 1. Basic dimensions and tolerances;

--- Part 2. Vocabulary;

--- Part 3. Storage, handling and installation;

--- Part 4. Performance test procedures;

--- Part 5. Identification of visual defects;

--- Part 6. thermoplastic and elastomeric properties of the coating material requirements.

This is Part 5 GB/T 21283 of.

This part identical with ISO 16589-5:2001 "sealing elements for rotary shaft lip seal thermoplastic materials - Part 5. External Viewpoint identification of defects "(in English).

This section is equivalent translation ISO 16589-5:2001.

For ease of use, this section made the following editorial changes.

--- Delete international standards foreword.

This part is proposed by the China Petroleum and Chemical Industry Association.

This part of the National Rubber and rubber products sealing products Standardization Technical Committee Technical Committee (SAC/TC35/SC3) Centralized.

This section drafted by. Euphorion seal Ltd. Zhejiang, Changzhou rambo Automotive Components Co., Qingdao Beihai sealing technology Limited, Qingdao Kai Shi Seal Industry Co., Ltd., Northwest Rubber Plastic Research and Design Institute, Shanghai fly on seals Limited.

Introduction

Rotary shaft lip seals are used to seal liquid on the relatively low pressure device. The most typical is the axis of rotation of the stationary chamber, However, in some cases, the shaft is stationary and rotating cavity.

Typically, there is a dynamic seal designed interference fit between the shaft and the flexible seal member.

Similarly, between the outer and inner hole seal cavity interference fit can seal liquid and prevents static leakage.

To avoid damage, before installation and during installation, it is necessary to be careful of all seal storage, handling and safety Equipment, improper storage, handling and installation can affect the seal life.

GB/T 21283.5-2008/ISO 16589-5:2001 the sealing element is a thermoplastic material rotary shaft lip secret Seals - Part 5. Identification of visual imperfections

1 Scope

This section GB/T 21283 describes a sealing element is a thermoplastic material rotary shaft lip seal, the sealing element is a thermoplastic Materials such as polytetrafluoroethylene (PTFE) as the base, with a suitably formed.

This section provides the sealing element is classified thermoplastic material rotary shaft lip seals (hereinafter referred to as seal) surface defects, these surface defects may weaken the role of the seal rings, which aims to facilitate manufacturers and users to discuss these defects on different occasions Impact.

Note. GB/T 21283 and GB/T 13871 complementary, GB/T 13871 stipulated elastomer seal.

2 Normative references

The following documents contain provisions which, through reference GB/T 21283 in this section constitute provisions of this section. For dated reference documents Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section.

GB/T 17446 Fluid power systems and components Terminology (GB/T 17446-1998, idt ISO 5598. 1985) GB/T 21283.2 sealing element is a thermoplastic material rotary shaft lip seals Part 2. Vocabulary (GB/T 21283.2-2007, ISO 16589-2:2001, IDT)

3 Terms and Definitions

Terms and definitions GB/T 17446 and GB/T 21283.2 established applicable to this section.

4 Flawed