Anti Static Device In Globe Valves

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Anti static device in globe valves.

Antistatic devices are much more necessary on rotary valves where the closure element ball etc is frequently floating on nonconductive polymer seats. Api 6d 2014 5 23 anti static device stipulates as follows. In this article we will talk about the anti static device of ball valve during the process of valve operating the friction between the soft seat and the metal ball will cause static inside the valve body which could potentially spark and light the fluid if it is flammable or even lead to an explosion or a fire. Fig 2 fire safe design.

Soft seated ball valve plug valve and gate valve shall have an anti static device. Application examples of anti static devices in valves. Anti static devices 20 are provided between the stem 15 and valve ball 14 and between the stem 15 and body 10. Anti static principle of floating ball valve is as shown in the figure.

An antistatic device ensures a positive electrical connection between the body pipeline and the plug so that the static charge can never accumulate. An insert 19 screwthreadably mounted in the body 10 retains the valve ball 14 and seat rings 18 in their operating positions. To avoid static sparkle an antistatic device is designed on the valve to derive the accumulated static from the ball. The test of the device shall be carried out in accordance with section.

The valve ball 14 is sealed to the body 10 by suitable seat rings 18. Anti static device jv090006 stainless steel fire safe ball valve iso 5211 direct mount a high performance fire safe stainless steel bodied full bore ball valve suitable for various heavy duty applications with an iso 5211 mounting pad enabling the valve to be fitted with various actuation options. When open and close the valve the friction between the ball and the non metal seat will produce static charges. To avoid static sparkle an antistatic device is designed on the valve to reduce or derive the static charge from the ball.

How to test that the anti static. It is used to protect the valve against spark that may ignite the fuel flowing through the valve.