Cast Steel Fixed Ball Valve
Product
Product
Cast Steel Fixed Ball Valve
Cast Steel Fixed Ball Valve

Cast Steel Fixed Ball Valve

design principle: DBB、DIB、Self-energying

Manufacturing scope: 2"-60"

Use temperature: -46°C-250°C

Applicable pressure: PTFE: 150Lb-600Lb

PCTFE: 150Lb-1500Lb

DEVLON: 150Lb-2500Lb

NYLON: 150Lb-2500Lb

PEEK: 150Lb-2500Lb


    FEATURES


    1. Elastic deformation self-energying(Single rubber seal)

    The rubber elastomer as the secondary primer seal, Whether it is a circular cross section or triangular cross section, its seal principle has been altered fundamentally, we call this principle as Elastomer's Elastic Deformation Self-Energying. The seal mechanism of elastic rubber seal ring has been changed, the medium stress slightly pushes the seat onto ball, it is not this medium stress to create seal, but just the medium stress oppresses the elastomer to make a elastic deformation when the medium getting into one side of elastomer groove, and the elastomer recover its original shape due to its stress so as to make a seal with the ball. Therefore the rubber is quickly used in the pipeline series ball valve which can replace high polymer material PTFE in the non-corrosive medium and obtain a good effect.


    2. DBB structure

    Usually seat is single direction seal structure, when the valve is working, the seat internal pressure from itself and the stress impacts on the seat from the ball are opposite. Our design purpose is that the pressed seat can quickly generate residual stress to overcome spring stress and release, that is to say, when cavity pressure is 1.33 times higher than pipeline pressure, it can automatically discharge pressure.


    3. DlB structure

    This structure can be used for bidirectional seal seat, stress on seat under the action of ball rotation, on the contrary, the seat stress impact on itself to realize bidirectional seal. But in this case, the sea itself will bear large pressure, it is necessary to install a vent valve to discharge the pressure.


    4. Nickel plated

    The nickel plated thickness on seat surface is 30mic,50mic, 70mic,which mainly used for seat, ball and stem surface treatment, this method is used for surface hardness HV600 or more. The plated coating mainly contain with a high phosphorus meeting the standard ofASTM B656-733-602-571-578.


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