Expanding Gate Valve

UAE Valves is famous for Expanding Gate Valve Supplier in Dubai. An expanding gate valve has an inter closure mechanism inside consisting of multiple pieces that expand in line with the bore of the valve, which is creating a mechanically energized compression seal. An expanding gate uses thrust generated by a threaded stem and drive, which pushes the gate mechanism downward, where it then expands horizontally so the seats compress in a horizontal motion. Expanding gate forms a tight positive mechanical seal. Double block and bleed capabilities
Design:
•Double block and bleed capabilities
•Seals at low and high line pressure
•Seat faces are outside the flow stream in the fully open or closed position considerably extending seal life
•Sealant injection fittings available for emergency situations
•Bonnet to body and yoke tube to bonnet connection secured by dual seal
•Thermal relief provided as standard with optional by-pass system for fugitive emission control.
Functions:
Through Conduit Double Expanding Gate Valve comprises a two piece wedge shape assembly consisting of a Gate and a Segment. The Gate is attached and driven by the stem and a centralizer helps in retaining the Gate-Segment assembly until sealing through expansion is required. Positive sealing is achieved in both high and low pressure conditions by expanding the Gate and the Segment out towards the seats while in a closed position.
Advantages:
•Metal seal in the sealing contacts.
•Backseat seal between the stem and the bonnet, easy for the change of sealing stuff under pressure.
•Sealing surface is hard-faced with the performance of anti-corrosion, wear-resistance.
•Specially used in the super high temperature working condition.