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NEEDLE VALVES
 
   
TECHNICAL SPECIFICATION
Types : Screwed Integral or Union Bonnet
Materials Of Construction
Body
:

Stainless Steel, CS A105, Brass, Monel, Hastelloy, Titanium , etc.

Stem :

SS 316 ,SS 304 , Monel.

Seat :

Metal & Soft.

Gland Seat :

P.T.F.E. standard, Grafoil Temp, above 180ºC.

Orifice Dia :

1/8” (3mm) To 1/2 “(12.7mm).

Size Range : 1/8” To 1”
End Connection :

Screwed NPT / BSP Ends, Twin Ferrule Tube Fitting Ends, Socketweld, Buttweld & Flange Ends.

Test Pressure :

25ºC Room Temperature, Hydrostatic up to 690 Bar Pneumatic -60 Bar .

Finish : CS Zinc Plated, SS –Natural
     

FEATURES:

  • Non – rotating self centering , anti- galling spindle trim gives positive bubble – tight shut off at the orifice. Straight & Angle pattern body styles, with choice of end connection.
  • Stem threads are cold rolled to achieve maximum strength & high accuracy.
  • Stems are micro finished at the packing area to have less torque in operating the valve .
  • The stem is anti blow out a major safety feature.
  • Packing below the stem threads, prevents stem lubrication washout & isolate threads from system fluids.
  • Upper Gland offers dynamic adjustment of the packing Gland Seal in response to pressure change & ensures leak free spindle sealing.
  • Metal to Metal , body to bonnet contact coupled with a special secondary Seal, offer an extremely effective leak free joint .
  • Choice of special trim material like 17.4PH , titanium is also used to suit specific requirement.
  • S.S. Lock pin adjacent to the hexagon bonnet prevents any unscrewing of the head unit.
  • Each valve is 100% tested at required pressure, to ensure leak tightness at Seat, Shell & Gland.


Powertech Valves (India), Mumbai -63, INDIA. Tel: +91-22-2685 1489. Fax: +91 -22- 2685 3826 Email: sales@powertechvalvesindia.com



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