Flowserve 800 Split-Wedge Gate Valve - Manual (Page 4)

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1.0 PHYSICAL DESCRIPTION AND OPERATION OF EQUIPMENT
1.1 Split-Wedge Gate Valves
The Flowserve Corporation split-wedge gate valve design is comprised of two independent disc segments, which
make up a wedge assembly.
The wedge assembly is designed to impart sufficient thrust to each disc segment to maintain acceptable seat
leakage. As the differential pressure across the disc increases, the seating load also increases, thus maintaining
acceptable leakage through the entire range of operating differential pressures. Since the discs are completely
independent of each other and the design is essentially symmetrical, zero leakage can be maintained in either
direction, depending only on the direction of flow. This feature eliminates the necessity of installing a check
valve to stop reverse flow.
To operate these manual valves, turn the handwheel in a clockwise direction for closure and counterclockwise
for opening.
2.0 DESIGN CONDITIONS
2.1 Refer to the applicable drawing in Section 13 of this manual.
3.0 OPERATING CONDITIONS
3.1 Refer to the applicable drawing in Section 13 of this manual.
800-lb. Split-Wedge Gate Valves FCD ADENIM0002-00