2707, 2022

Correct operation of manual valves

Manual valve is a kind of valve commonly used in equipment and devices, which is operated by handle and handwheel. Under normal circumstances, the clockwise rotation of the handle and handwheel is specified as the [...]

2007, 2022

Certification and Testing of Valves and Actuators

ISO 9001 Quality Management System Certification The function of this certification is to establish a quality assurance system from product design to after-sales service, and to monitor and control the quality system, so as to [...]

3006, 2022

Valve performance testing

When a valve is manufactured in batches of a certain specification, an authoritative organization should be entrusted to carry out the following test: Table of Content Performance tests Opening and closing torque of valve under [...]

2506, 2022

6 tips select valve material

Valve material Since gray cast iron pipes are gradually not recommended, the valve body material should be mainly ductile cast iron, and the grade and the actual physical and chemical testing data of the casting [...]

1006, 2022

8 technical requirements for valve procurement

Valve specifications and categories should meet the requirements of pipeline design documents The model of the valve should indicate the requirements of the national standard number on which it is based. If it is an [...]

506, 2022

Valve operating temperature classification

I have put forward the following suggestions on the classification of operating temperature of valves, which have been published in magazine “Valve”. A brief introduction is as follows: -254°C~-101°C, it is “ultra low temperature valve” [...]

3005, 2022

Valve Standards: The Definitive Guide(2022)

Valve Basic Standards GB/T 1047-2005 Definition and selection of DN (Nominal size) of piping components GB/T 1048-2005 Definition and selection of PN (nominal pressure) of piping components GB/T 6567.4-2008 Technical drawings  Graphical symbols of pipeline [...]

1605, 2022

What are the general selection principles of ball valves?

For the pipelines and storage equipment of refined oil, ball valves with flanged connnections need to be selected. In the pipeline system and device of low temperature medium, the low temperature ball valve with extended [...]

105, 2022

Support the Beijing Winter Olympics

The pace of the 2022 Beijing Winter Olympics Games is gradually approaching. With the meteorological conditions and hardware facilities meeting the work requirements, the National Alpine Skiing Center has officially started the Winter Olympics snowmaking. [...]

103, 2022

Structural characteristics of fully welded ball valve

Fully welded ball valves are widely used in various fields. Its superior quality and high performance stability are beyond the reach of ordinary cast steel ball valves, and its service life is far greater than [...]