PQ347H eccentric half ball valve

The valve uses a double eccentric structure, the use of eccentric deformation wedge action principle to make the valve seal pair to form a tight and separate. In order to achieve reliable valve sealing and rapid opening and closing.

Performance characteristics

 

Due to the different radius of rotation of all points on the valve disc sealing spherical surface, the eccentric spherical curve is equal to the curve. When closing, the sealing spherical surface enters the valve seat and closes more and more tightly to form sufficient sealing specific pressure, and the bidirectional sealing performance is stable and reliable.

Because the disc is a full circular straight channel, the flow resistance is small, and it has good flow performance.

The sealing pair has wear resistance, corrosion resistance and long service life.

In the process of switching, the dirt on the sealing surface can be removed without affecting the seal.

In the long-term use, when the sealing position changes, the sealing spherical surface moves forward in equal amount, and still maintains a tight state with the fixed sealing seat, which can realize a new seal.

Main parts

1	Pressure plate
2	Hard seal valve seat
3	Valve body
4	valve shaft
5	Self-lubricating bushing
6	valve ball

 

 

Executive standards

Design: GB/T 26146-2010 Eccentric ball valve

Flange connection: GB/T9115 (or according to user requirements)

Structure length: GB/T12221-2005 and internal standards

Pressure test: GB/T12221-2008

 

Model Interpretation

 

 

Name	Material
Valve body, valve plate	QT450-10, WCB, stainless steel, alloy steel
valve shaft	40Cr, stainless steel
Valve Plate Seat	Alloy carburized steel, nitrided stainless steel, wear-resistant hard alloy
Valve Seat	Alloy nitriding steel, nitriding stainless steel, wear-resistant hard alloy
Bearing	aluminum bronze,FZ-1 composite, stainless steel
Packing	PTFE, flexible graphite