ISO/PWI 26705

Rubber seals — Rubber seals for transformers with esters as insulating liquid — Requirements

General information

Current stage: 00.60 Close of review Jun 30, 2026

Originator: ISO

Owner: ISO/TC 45/SC 4 Products (other than hoses)

Type: International Standard

Scope

This document specifies requirements for rubber seals used in transformers with natural or synthetic esters as insulating liquid.
The requirements include:
- technical properties,
- test methods,
- applicable temperature conditions,
- marking,
- packaging, transportation, and storage.

Life cycle

NOW

IN_DEVELOPMENT
ISO/PWI 26705
00.60 Close of review
Jun 30, 2026