3 inch long stem pressure seal gate valve

3 inch long stem pressure seal gate valve

Leakage reasons and troubleshooting methods of the sealing ring of the pressure seal valve: 1, the cover and the sealing ring between the incomplete: foreign body clamping, sealing surface corrosion and erosion. Note: the self-sealing ring is made of soft nickel alloy steel and should be handled with great care. 2, pressure seal valve spool and gasket of the pressure seal gate valve between the seal is incomplete: due to corrosion and erosion caused by the surface defects of the valve body wall,

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Leakage reasons and troubleshooting methods of the sealing ring of the pressure seal valve: 1, the cover and the sealing ring between the incomplete: foreign body clamping, sealing surface corrosion and erosion. Note: the self-sealing ring is made of soft nickel alloy steel and should be handled with great care. 2, pressure seal valve spool and gasket of the pressure seal gate valve between the seal is incomplete: due to corrosion and erosion caused by the surface defects of the valve body wall, the loss of circle, or sealing surface of metal failure such as surface cracks or wounds or uneven metal, may lead to incomplete sealing between the spool and the self-sealing ring. These faults may represent deep cracks in the casting material acting as by-passes in the sealing ring. Torque wrenches should be used to tighten the studs of the bonnet retainer, which can pressure the self-sealing ring. These fasteners are too tight for stress testing during factory manufacture. The following steps are recommended on site: tighten bonnet retainer fasteners at all times to prevent leakage; When removing the valve for any reason, tighten the bonnet retaining bolt again with pressure; All fasteners must be well lubricated to use these values for proper preloading. If the leakage cannot be stopped after tightening, the system shall be re-isolated and disassembled for inspection (note: the pressure seal gate valve shall be replaced with the self-sealing ring regardless of the cause of failure).

Structure of the 3 inch long stem pressure seal gate valve

3" inch pressure seal long stem gate valve price Structure 
1   Thrust bearing
2   Three “O” type seal ring
3   Precision machined stainless steel valve stem
4   High performance rubber and the latest vulcanization technology are adopted inside and outside
5   Flat seat  
6   Non-toxic epoxy resin coating

Features of the 3 inch long stem pressure seal gate valve:

1.The whole package rubber valve core, the valve core for the ductile iron skeleton,High performance rubber and the latest vulcanization technology are used to cover the inner and outer parts,It has excellent sealing elasticity to achieve zero leakage.

2.It adopts three “O” type seal ring design, which has tight sealing, greatly reduced frictional resistance and environmental protection and sanitation. It can also replace the “O” type apron with pressure without stopping water. 

3.Corrosion resistant, the inner and outer surfaces of the valve are coated with epoxy resin, and the inner parts are made of stainless steel and copper alloy to prevent rust and fluid corrosion. Can be directly used in domestic water, medicine and other industries.

 

              3" inch pressure seal long stem gate valve price Main parts list of the 3 inch long stem pressure seal gate valve
  Name   Material
  Valve body   bonnet   Ductile cast iron
  Bonnet seal   NBR or EPDM rubber
  Valve plate   Ductile iron coated with EPDM or NBR
  Valve stem   304,2Cr13
  Screw nut   Copper alloy, brass, ductile iron

 

  3" inch pressure seal long stem gate valve price  Main Parameters of the 3 inch long stem pressure seal gate valve
  PN Mpa   1.0 Mpa   1.6Mpa
  Test pressure   Seal   1.1Mpa   1.76Mpa
  Shell   1.6Mpa   2.4Mpa
  Driving Method

  Manual,Electric

  Suitable medium   Water,vapor,oil
  Suitable temperature   0℃-80℃

 Main external and connecting dimensions of the 3 inch long stem pressure seal gate valve

DN  50   65  80 100 125 150 200 250 300 350 400
L 178 190 203 229 254 264 292 330 356 381 406
H 240 260 265 310 370 420 500 610 670 820 860

 

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