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DIN Standards Committee Plastics

Abstract

This document specifies a test method for the determination of the opening, closing and running torque of thermoplastics valves. This document is applicable to all types of manually operable thermoplastics valves, with or without actuator, intended to be used for the transport of fluids. NOTE 1 Examples of valve types tested with this method are in ISO 4437-4, ISO 16135, ISO 16136, ISO 16138, ISO 16139, ISO 16486-4, ISO 21787, EN 1555-4 and EN 12201-4. This document does not specify the relationship between the torque and its possible increase after prolonged use of the valve under a specific working condition or wear/chemical aggression of the materials. NOTE 2 Concerning the chemical aggression of the materials, a collection of data is reported in ISO/TR 10358; concerning the endurance test necessary to confirm the ability of hand-operated plastics valves to withstand prolonged use with repeated opening and closure, further information is provided in ISO 8659.

Begin

2019-11-11

WI

00069241

Planned document number

DIN EN ISO 8233

Project number

05402056

Responsible national committee

NA 054-05-03 AA - Fittings for pressure pipelines made from thermoplastic materials  

Responsible european committee

CEN/TC 69 - Industrial valves  

Responsible international committee

ISO/TC 138/SC 7 - Valves and auxiliary equipment of plastics materials  

draft standard

Thermoplastics valves - Torque - Test method (ISO/DIS 8233:2020); German and English version prEN ISO 8233:2020
2020-09
Order from Beuth Verlag

Thermoplastics valves - Torque - Test method (ISO/DIS 8233:2023); German and English version prEN ISO 8233:2023
2023-02
Order from Beuth Verlag

previous edition(s)

Thermoplastics valves; torques; test method (ISO 8233:1988); german version EN 28233:1990
1991-06