Free Disposable Medical Masks from Dervos
- Dec 11,24
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In the past two months Chinese people made great efforts to fight against the COVID-19. Allthought it was not a period of easy time for us, we were still so mov
Dervos’ First Batch of Free Masks on Its Way
- Dec 11,24
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Dervos posted it's first batch of supplies, of which consists 14 packages, carrying 3200 pieces of disposable medical masks and 500 KN95 masks, to Hungary,
Attractive Merits of Ball Valve
- Dec 11,24
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"A ball valve is a form of quarter-turn valve which uses a hollow, perforated and pivoting ball to control flow through it.” The ball valve is used in the
Check These Things over before Buying Your Own Valves
- Dec 11,24
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Presumed that you are in need of a valve, do you know about how to determine the exact valve you are going to order? There are several things you have to consid
Five types of the valve sealing
- Dec 11,24
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The valve sealing face is composed of a valve seat and a closing member. The sealing surface on the valve seat and the closing member is tightly contacted or th
The differences between soft seal and hard seal of butterfly valves
- Dec 11,24
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For butterfly valves, hard seal means that both sides of the seal are made of metal material or other hard materials. The sealing performance of this seal is po
Features of Ball Valve
- Dec 11,24
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The main features of the ball valve are their compact structure, reliable seal, simple structure, easy to repair. The sealing surface and the spherical surface
Valves fire resistance test
- Dec 11,24
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The petrochemical industry is one of the pillar industries of the national economy. Its production process is complex, and the raw materials, semi-finished prod
Opening of DERVOS INTEGRATION CENTER
- Dec 11,24
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On Oct. 29th, a big opening ceremony of Dervos Integration Center was held in Lishui, Zhejiang. We invited our important customers to share this happy moment.
What is a foot valve?
- Dec 11,24
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Foot valve, also called bottom valve, belongs to a type of check valve. Different from other valves, a foot valve has a larger flow area than the pipe size, whi
The relation between Valve Size and Medium Flow Velocity
- Dec 11,24
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1. The flow rate and flow velocity of the valve mainly depend on the diameter of the valve and the resistance of the structure of the valve to the medium. At
Brief introduction of V-TYPE BALL VALVE
- Dec 11,24
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V-type ball valve is a kind of ball valve. Its closing part is a V-shaped opening on the ball. The V-shaped opening has a sharp edge. During the rotation of the