Carbon Steel Forged Steel Ball Valve / full welding Ball Valve DN100-DN1200 extented stem
| Place of Origin: | Zhejiang |
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Company Profile
| Location: | Hangzhou, Zhejiang, China (Mainland) |
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| Business Type: | Manufacturer |
| Main Products: | Forged Steel Ball Valve, 3 Way Ball Valve, Floating Ball Valve |
Product Detail
| Model No.: | NPS 4-48 |
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Product Description
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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