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LISHUI OUYI VALVE CO., LTD  

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Stainless Steel Ball Valves Stainless Steel Ball Valve 

Place of Origin: Zhejiang, China (Mainland) 
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Product Detail

Model No.: NPS 4-48


 
Carbon Steel Forged&

 

Carbon Steel Forged Steel Ball Valve / Full Welded Ball Valve DN100-DN1200,extented stem,BW add Pipe,Extented Stem ball valve service underground pipeline

 

Quick Detail: 

 

Size & Pressure : 

150# DN100-DN1200 

300# DN100-DN1200 

600# DN100-DN1200 

900# DN100-DN900 

1500# DN100-DN500 

2500# DN100-DN300

   

Bore: FULL BORE,REDUCE BORE

 

End: RF,RTJ,BW,

 

Body Material: forged A105N,LF2,F6A,F304,F316,F51,F53,F55 and others.

 

Extented Stem ball valve service underground pipeline

 

 

Description:

 

FULL WELDED BALL VALVE

1.Bow-out proof stem

For the purpose of preventing the stem from flying off  resulting in abnormal rising of the inner 

pressure of valve,shoulder is fixed at the lower part of the stem.In addition,in order to prevent 

leakage resulting from burnout of packing set of the stem in a fire,thrust bearing is set at the 

contact position of the shoulder at lower part of the stem and valve body.Thus an inverse seal 

seat is formed which will prevent leakage and avoid accident.

 

2.Anti-fire safe design

When the trunnion ball valve be used normally,its sealed by seat and ball surface,seat retainer 

sealed by O-ring and body,this is soft sealed and reliable sealing.When the seat and O-ring are 

burnt,the seat retainer and body will be sealed by expanded graphite.Thus act anti-fire safe purpose.

 

3.Anti-static device

In order to prevent friction among ball,stem and PTFE that generates static electricity which may 

light the combustibles and explosives that cause an accident,in this ball valve,static-conduction spring 

is set between the stem and the ball,the stem and the body.Thus static electricity is conducted to 

ground and system safety is secured.

 

4.Free leakage of body Sealed construction

The connective position of valve body and bonnet is double sealed by gasket and O-ring,on this 

base,such factors as fire,high temperature,shock and uneven opening or closing of the torque all 

can't induce external leakage.

 

5.Low torque in operation

The self-lubricated bearings are installed at the friction of stem,resulting in wear resistance,fiexibility 

of operation and low torque.

 

6. Double block&bleed(DBB)

When ball is full open or close position,the transmitter substance in center cavity of body can be 

released by drainage and emptying devices.In addition,the over loaded pressure in the center cavity 

of valve can be  released to low pressure end by self relief seat.

 

7.Emergency sealing

Compound injection holes are designed and compound injection valves are installed at locations of 

stem/cap and body support of side valve.When sealing of stem or seat is damaged to induce leakage,

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 Mr. Chen Chao Kui

Tel: 86-577-67319116
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Company Info

LISHUI OUYI VALVE CO., LTD [China (Mainland)]


Business Type:Manufacturer
City: Wenzhou
Province/State: Zhejiang
Country/Region: China (Mainland)

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