DeZURIK
VPB V-Port Ball Valves
D10324
Page 4
February 2016
Description
The DeZURIK VPB V-Port Ball Valve is a quarter-turn stainless steel control valve for corrosive and
abrasive liquids, gases and slurries. A choice of materials, actuators, and accessories is available.
Handling
Lifting the valve improperly may damage it. Do not fasten lifting devices to the
actuator, ball or through
the seat opening in the body. Lift the valve with
slings, chains or cables fastened around the valve
body, or fastened to bolts or
rods through bolt holes in the flanges.
Installing Valve
Install the valve with self-centering flat ring gaskets and ANSI flanges. Use either Class 150 or Class
300 flanges, as designated following “Class” on the valve data plate. Before installation, remove foreign
material such as weld spatter, oil, grease, and dirt from the valve, flanges, and pipeline.
The valves with flex metal or PTFE seats are bi-directional, and may be installed with flow in either
direction. For maximum performance, the valve should be positioned in the pipeline with the greater
pressure against the seat side of the valve. The rigid seat must be positioned in the pipeline with the
greater pressure against the seat side of the valve.
Close the valve, align the pipeline on both sides of the valve, and ensure that the flanges, gaskets and
valve are centered before tightening the flange bolts or studs. Tighten the bolts or studs evenly, in a
crisscross pattern. Tighten the bolts or studs on the seat side of the valve so there is metal-to-metal
contact between the seat retainer and the valve body.
Operation
Clockwise rotation of the valve shaft closes the ball in the valve. The ball is the closure member of the
valve. As the ball rotates, a V-shaped notch in the ball forms a variable orifice with the circular seat in
the body. The valve actuator is connected to the valve shaft, and positions the ball at the open, closed,
and intermediate positions.
The valve is fully closed when the ball is centered on the seat, and the valve is fully open when the ball
is 90 degrees counterclockwise from the closed position. The open and closed positions are
determined by the actuator. Refer to the Actuator Instructions for adjusting the open and closed position
stops. A line is stamped on the top of the valve stem to indicate the angular position of the ball when
the ball is not visible. See the top of the shaft in Figure 1.
