Brief introduction to post weld heat treatment (PWHT)
- Feb 13, 2020
- Hits: 294
We often receive inquiry from our customers detailed as below: API 602 Gate Valves, Bolted Bonnet, Rising Stem, Socket Weld with 100mm Long Plain End Nipples Welded at Both Ends, PWHT. So have you heard...
Precaution for construction & installation of Lubricated Plug Valve
- Jan 13, 2020
- Hits: 104
1. Handle gently with the package. Keep its top up and cannot reverse it. 2. Valves and all kinds of parts cannot be stored outdoors. If stored outdoors, take precautions against rain, dust and rust,...
Brief introduction of an eccentric plug valve - double offset valve
- Jan 03, 2020
- Hits: 149
The eccentric plug valve was first applied in paper industry to handle fluids with solid content. The eccentric plug valve is composed of a metal body and bolted bonnet. The plug disc owns a resilient...
Nuclear power gate valve - part 2
- Dec 18, 2019
- Hits: 46
There are four main types of nuclear gate valves; they are wedge-type elastic single gate valve, wedge type double gate valve, parallel double gate valve with spring preload and parallel double gate valve...
Material selection of valve sealing surface
- Dec 12, 2019
- Hits: 37
The sealing surface of the valve is the most critical working surface of the valve. The quality of the sealing surface of the valve directly reflects the service life of the valve, and the material used...
Dervos established its Integration Center in Lishui this October
- Nov 27, 2019
- Hits: 42
On October 29th, 2019, Dervos had witnessed the opening ceremony of its Integration Centre in Lishui City, Zhejiang Province. The Centre covers an area of 2,000 square meters, and will provide our customers...
The difference between Metal seated and Soft seated butterfly valves
- Nov 21, 2019
- Hits: 168
Metal seated butterfly valve is that both sides of the seal are made of metal material or other hard materials. This seal has poor sealing performance, but is resistant to high temperatures, abrasion...
Valve salt spray test
- Nov 13, 2019
- Hits: 35
As we all know that the valve body like carbon steel (WCB, WCC, LCB, LF2, A105), stainless steel (SS304, SS316, F304L, F316L), hastelloy (Alloy 20) etc., or even in the trim material always use metallic...
Nuclear power valve - part 1
- Nov 06, 2019
- Hits: 40
Nuclear power valves are valves used in nuclear power plants in nuclear island NI, conventional island CI, and power plant auxiliary facility BOP systems. From the security level, it is divided into nuclear...