Definitions of the valve nominal pressure, working pressure and design pressure?
- Sep 19, 2019
- Hits: 1958
1. What is the nominal pressure PN (MPa)? The reference value relating to the pressure resistance of the piping system component refers to the design given pressure in relation to the mechanical strength...
Selection materials for valve sealing surface
- Sep 11, 2019
- Hits: 74
The valve sealing surface is generally selected according to: 1. Operating temperature of the valve. 2. Working pressure and corrosiveness of the medium. 3. The type of valve and the structure of the...
Comparison of butterfly valve and ball valve
- Sep 04, 2019
- Hits: 95
The Butterfly Valve is coupled to a handle, gear operator or actuator that rotates the shaft of the metal disc attached to the interior of the valve by 90°. When the disc rotates in the direction...
An excellent choice for sea water application - Aluminum Bronze
- Aug 28, 2019
- Hits: 115
Aluminium bronzes are most valued for their high strength and superior corrosion resistance. The most common one is Nickel Aluminium Bronze B148 C95800, which is widely used in Gate Valves, Globe...
The "Silent" Nozzle Check Valve
- Aug 21, 2019
- Hits: 76
The photo shown below is axial nozzle check valve, 14 Inch, Class 300 LB, RF Flange, WCB material, typical for its "silent" & non-slam characteristic. For critical process equipment, the...
Pipeline Check Valve Installation
- Aug 14, 2019
- Hits: 62
1. When installing, pay attention to the direction of media flow should be consistent with the direction of the arrow in the valve body. 2. Install a check valve before the condensate from the trap enters...
Introduction and Selection of Safety Valves
- Aug 07, 2019
- Hits: 116
The safety valve is a special valve in which the opening and closing member is in a normally closed state under the action of an external force. When the pressure of the medium in the equipment or the...
5 Factors to Be Considered When Choose Right Ball Valves
- Jul 31, 2019
- Hits: 57
Ball valves are having good performance in shut-off application and are widely used, but do you know how to choose a right one? Factor 1: What is the working pressure? It is important for you to decide...
Briefing for Radiographic Testing
- Jul 24, 2019
- Hits: 421
Sometimes we will have orders requesting for Radiographic Testing (RT), say for API 600 Gate Valves, Butt-weld Ends, 8”, 2500 LB, as it will be applied in critical working condition. Then, what's...
Three designs of Gate Valve Stem
- Jul 17, 2019
- Hits: 309
Three different bonnet/stem design configurations are used in the gate valve construction: the lower threaded rising stem, the non-rising stem and the upper threaded bracket. The lower threaded lift bonnet/stem...