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Sep 12, 2017

Our customer want to buy forged steel trunnion mounted ball valve from 2” to 8” pressure 300LB to 900LB. After customer field visit our factory,at the same time our sales manager also introduced our production capacity and quality to our customer minutely and carefully. They are very pleased to cooperate with us.

Though it is very hot,temperature is max 45℃, but in the efforts of our workers together, we completed goods smoothly and shipped them on time. Because the goods is too much and too many,we have to ship them twice.

This is the shipment as following:

1.body:ASTM A216 WCB

2.Ball:ASTM A182 F316

3.Seat : A182 F316+RPTFE

4.Stem:ASTM A182 F316

5.Gasket: SS316+Flexible Graphite

6.Bolt bonnet

7.Manufacture:ASME B16.34

8.Fire safe

 forged steel trunnion mounted ball valve.png

The ball valve's ease of operation, repair, and versatility lend it to extensive industrial use, supporting pressures up to 420 bar and temperatures up to 752 °F, depending on design and materials used. Sizes typically range from 0.25 to 48 inches ( 6 to 1200mm). Valve bodies are made of metal, plastic, or metal with a ceramic; floating balls are often chrome plated for durability. One disadvantage of a ball valve is that they trap water in the center cavity while in the closed position. In the event of a freeze, the sides can crack due to expansion of ice forming. Some means of insulation or heat tape in this situation will usually prevent damage. Another option for cold climates is the "freeze tolerant ball valve". This style of ball valve incorporates a freeze plug in the side so in the event of a freeze up, the freeze plug ruptures (acts as a sacrificial disk), thus making for an easy repair. Now instead of replacing the whole valve, just screw in a new freeze plug.

In the case that a ball valve is used for cryogenics or product that may expand inside of the ball, there is a vent drilled into the upstream side of the valve. This is referred to as a vented ball. Safety is the number one concern when engineers specify a vented ball.