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Turbine ball valve

Turbine ball valve

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Globe Valve
Describe
Fixed American standard ball valve
 
First, the structural characteristics
 
The ball valve is a valve that uses a ball with a circular through hole as a starting and closing member, and the ball rotates with the valve stem to realize the opening and closing action. Its advantages are:
 
1. The fluid resistance is small. When fully open, the cross-sectional area of ​​the ball passage, the valve body passage and the connecting pipe are equal, and the line is in a straight line.
 
Through, the medium flows through the ball valve, which is equivalent to flowing through a straight pipe, and the ball valve has the least fluid resistance in all kinds of valves.
 
2, the opening and closing is rapid, only need to turn the ball 90 ° when opening and closing, convenient and rapid.
 
3. The structure is simple, the volume is small, and the weight is light. In particular, its height is much smaller than the gate valve and the shut-off valve.
 
4 valve body is made of silicon melt glue for precision casting, and the appearance is smooth and beautiful.
 
Second, technical parameters
 
Nominal pressure: 1.6MPa-6.4MPa;
 
Nominal diameter: DN200~DN400;
 
Test: Hydraulic housing strength test - 1.5 times the maximum rated working pressure
 
            High pressure liquid seal test - 1.1 times the maximum rated working pressure
 
            Low pressure gas seal test - 0.6Mpa;
 
Applicable temperature: ≤120 °C (soft seal) ≤ 425 ° C (hard seal)
 
Applicable medium: oil, gas, water, etc. (WCB); nitric acid (CF8);
 
 
Fourth, the relevant standards
 
1. Design and manufacture: GB/T 12237;
 
2. Structure length: GB/T12221;
 
3. Connection flange: JB/T 79;
 
4, pressure temperature: GB/T 12224;
 
5. Inspection test: GB/T 13927.
 
Five, the main parts material
 

Name

Material

Material

Valve body

WCB

CF8

Sphere

A105

304

Seat

PTFE

     PTFE

cap

WCB

CF8

Gasket

304+ flexible graphite

304+ flexible graphite

Valve stem

2Cr13

304

filler

Flexible graphite

Flexible graphite

Packing gland

WCB

CF8