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Gate valves<br />
• The valves used on the<br />
choke manifold are of<br />
the gate valve type.<br />
Their main parts are:<br />
1. positive rotating seats<br />
2. gate and seat assembly<br />
3. solid gate<br />
4. thrust bearings<br />
5. threaded packing retainer<br />
6. back-seating<br />
7. stem pin<br />
8. grease injection port<br />
9. body and trim
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