3 Piece Stainless Ball Valve

Product Date:

Size: 1”~56”

Class: 150LB 〜2500LB

3PCS Forged Body

Fixed ball structure ,DBB Structure

Anti-Static device

Blow-out proof Stem

Anti-Fire Structure

Seat, stem emergency seal grease injection design

Double Block And Bleed (DBB)

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. Double Block And Bleed (DBB)

Bergamo fixed ball valves generally adopt a ball front seat sealing structure. The two valve seats of the fixed ball valve can independently cut off the medium at the inlet and outlet ends, realizing the double-break function. When the ball valve is closed, even if both ends of the valve inlet and outlet are pressurized at the same time, the middle cavity of the valve and the passages at both ends can be blocked from each other, and the remaining medium in the middle cavity can be discharged through the relief valve.

At the same time both front and rear seats block the medium

2. Automatic pressure relief of valve middle cavity

This kind of center cavity automatic pressure relief ball valve includes a valve body, a ball, a valve seat, and a valve seat bracket.When the liquid medium in the middle cavity of the valve with the temperature rise, pressure rise, the medium in the middle cavity can rely on its own role to push the valve seat to release pressure automatically, so as keep safety of the valve.

3. Double isolation and relief design of valve(DBB)

This is a method to completely isolate the pipelines at both ends through two shut-off valves and a relief valve in the middle. Closing the two main valves and opening the relief valve can improve the safety of the system. If the first valve leaks, the leaked medium can be led out by the opened relief valve.

From entering the middle cavity from the front and rear seats simultaneously block the medium

4.Manual and automatic pressure relief of middle cavity of Valve

Manual and automatic pressure relief of middle cavity of Valve The quality trapped in the middle cavity of the valve body can be manually discharged through the pressure relief valve on the valve body; in some working conditions the quality trapped in the middle cavity of the valve vaporizes due to the increase in temperature , When the pressure in the middle cavity rises abnormally, when the pressure of the medium in the middle cavity exceeds the set value, it can be automatically discharged through the safety valve set on the valve body to protect the safety of the valve and the pipeline.

The front and rear seats simultaneously block the material from the middle chamber into the upper and lower ends.

5.Fireproof Structure Design

Bergamo ball valves are equipped with O-ring seals and metal graphite wound gaskets on the sealing parts of the valve. When the valve is in fire, the valve seat seals and seals made of non-metallic materials such as rubber and PTFE When the gasket, O-ring and other seals are damaged, the outer layer of metal graphite wound gasket provides auxiliary sealing; when the sealing ring on the valve seat burns, the metal valve seat will automatically form a metal seal with the ball under the thrust of the spring, which is effective Ground control the internal leakage and exposure of the valve. The fire protection design of the valve fully complies with the requirements of API 607. API 6FA, BS 6755 and JB/T6899 and other standards, and has passed the API 607 fire test.

Soft seal between valve seat and ball before buring

Metal seal between valve seat and ball after burning

6. Blow-out Proof Stem

The valve stem adopts anti-blowout structure design. The valve stem with a large lower end and a small upper end is positioned by the gland and screws, even in the case of abnormal pressure increase in the valve chamber, it can ensure that the valve stem will not be blown out by the medium.

7. Anti-static Structure

The valve is designed to meet the anti-static requirements. Anti-static springs and small balls are set between the ball and the valve stem, and between the valve stem and the gland, so that the ball and the valve stem, the valve stem and the valve body are always maintained Conductivity continuity. Therefore, static electricity generated by the friction between the ball and the valve seat can be led to the ground through the valve body to prevent possible fire or explosion hazards caused by static sparks.

Application:

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