Fully Welded Trunnion Ball Valve

Product Date:

Size: 2”~40”

Class: 150LB 〜2500LB

Fully Welded Forged Body

Trunnion DBB Structure

Anti-Static device

Blow-out proof Stem

Anti-Fire Structure

Design standard:

Design According: ASME B16.34/API 6D

Test According: API 6D

RF End: ASME B16.5

BW END: ASME B16.25

Face to Face: ASME B16.10

Anti-Fire Test According: API 607/API 6FA

Acid environment: NACE MR 0175

Advantages:

1.Shell welding

The valve shell is welded by the full-automatic submerged arc welding machine, with uniform weld seam, no defects such as slag hole, small heat input, reducing the leakage of the valve caused by welding deformation or burning of the seal. The weld seam shall be inspected by X-ray flaw detection and dye penetrant flaw detection to check the weld quality

2.Weld heat insulation deformation groove

A groove is designed at the welding seam of the valve shell to prevent the heat from transferring directly to the seal and to absorb the welding deformation, so as to improve the welding speed of the valve and the welding qualification rate of the valve.

3.Valve seat rotating structure

Because the shell of fully welded ball valve is welded, it is not allowed to replace the internal parts, so the sealing part of the valve is required to have a very good reliability and service life. In general, the friction position between the ball port and the sealing surface of the valve seat is fixed during the process of opening and closing. Multiple times of opening and closing are easy to cause the sealing surface of the valve seat in contact with the ball port to wear rapidly against other sealing surfaces. To solve this problem In order to improve the service life of valve sealing surface, we designed a kind of rotatable valve seat to make the valve have different sealing surface and qiukou friction each time in the process of opening and closing.

4.Extended stem, grease and drain device

In order to meet the requirements of underground pipeline, the valve stem, grease injection and discharge devices shall be lengthened according to the customer's requirements during the design of all welded valve to meet the customer's requirements for underground conditions.

Shell welding and heat insulation deformation groove

Extended stem, grease and drain

Application:

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