An introduction to fire safe valves- spring loaded valves
- Oct 12, 2024
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One of the most recent developments in industrial tools to prevent any sad event due to fire is the introduction of fire safe valves. These valves are designed
Structural features and application of high-pressure gate valves
- Oct 12, 2024
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Product features of high-pressure gate valves The seat sealing cover is made of iron-base chromium-nickel stainless steel surfacing, with good abrasion resistan
Dervos' Banquet for Mid-Autumn Day
- Oct 12, 2024
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Here was the Mid-Autumn Day again! Each year, Dervos has the Bobing Activity and then a dinner together on this day. This year, things went a little bit differe
The Fifth Day of DERVOS 10th ANNIVERSARY
- Oct 12, 2024
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On June 28, our team came to the food stall called Oriental dragon palace spicy crayfish to have a gluttonous feast. HOT TALKS IN THAT NIGHT! And our delici
How to identify refurbished valves
- Oct 12, 2024
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Nowadays, the valve market is complicated, and unscrupulous traders are making huge profits by refurbishing used valves as new ones, which brings great safety h
The first 140MPa domestic cage throttle valve was successfully applied in Tarim
- Oct 12, 2024
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A made-in-China 140MPa cage throttle valve was applied in Well Keshan 134 Tarim successfully. And it has been working well. The throttle valves used at the we
Introduction of six types of flange gaskets
- Oct 12, 2024
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Flange gaskets are used for pipe flange connection, they are seals between two flanges. Medium, pressure and temperature directly influence the selection of fla
Connection of valves
- Oct 12, 2024
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Usually valves have 7 types of connection, they are as bellow: 1. Flange connection: Flange connections are the most common form of connection between valves a
The way of medium flow for globe valves
- Oct 12, 2024
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A globe valve is designed to allow medium flow under the seat, with the aim of making the flow resistance small and saving effort when opening the valve. At the
The differences between a double and a triple offset butterfly valve
- Oct 12, 2024
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Butterfly valves are like ball valves however have a few focal points. They are small and when activated pneumatically, they open and close rapidly. The plate i
The travel of Dervos in Qinghai Province
- Oct 12, 2024
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Last week, Dervos organized a travel to Qinghai province, a famous place for its natural scenery and flocks of sheep and cattle. The first stop of this journey
Valve welding inspection
- Oct 12, 2024
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Valve welding inspection generally consists of following two parts: 1. Document review: 1.1 WPS(WELDING PROCEDURE SPECIFICATION), PQR, welder qualification WPQ