DeZURIK
BHP High Performance Butterfly Valves
November 2015
Page 5
D10503
Installing Valve
Lifting the valve incorrectly can damage it. Do not fasten lifting devices to the actuator or
disc, or through the seat opening in the body. Lift the valve with slings fastened around
the valve body or attach them to bolts or rods run through holes for the pipeline flanges.
1. If the valve does not have an actuator, mount the actuator on the valve. Refer as necessary to
the actuator instructions and drawings.
2. Remove all foreign material such as weld spatter, oil, grease and dirt from the valve, flanges
and pipeline.
3. Open the valve and clean the seat and the sealing edge of the disc.
Note:
Install the valve so that the side opposite the seat will be on the higher pressure side
when the valve is closed. The seat side of the valve is marked “SEAT”. Pipeline flow may be in
either direction through the valve.
•
Valves with the metal seat option must be installed with higher pressure on the
seat side when the valve is closed.
4. Place the valve in the pipeline with the valve closed—handle the valve carefully so that the
flange gasket sealing surfaces do not get damaged.
5. Ensure that the valve, the pipeline and the mating connections are aligned and centered before
tightening the pipeline bolts.
6. Tighten the bolts evenly, in a crisscross pattern.
Operation
Clockwise rotation of the valve shaft closes the disc into the seat. A line on the top of the valve shaft
indicates the position of the disc when the disc is not visible.
The valve is fully closed when the flat side of the disc is parallel with the flange sealing surface on the
body. The valve is fully open when the disc is 90° counterclockwise from the closed position.
Note:
The closed disc should not touch the stop lug in the body.
The actuator is connected to the valve shaft and positions the disc at the open, closed or intermediate
positions. The position stops in the actuator are set to match the open and closed positions of the valve.
Note:
Refer to the actuator instructions for stop adjustment information.
Required Tools
This valve is assembled using only SAE fasteners. To service this unit, you should have a full set of
combination wrenches, Allen wrenches, a flat tipped screwdriver, a pin punch and a dead blow hammer.
Lubrication
The valve is lubricated at the factory and does not require lubrication except when it is being
reassembled. Refer to the actuator instructions for actuator lubrication requirements.
Adjusting Packing
The shaft seal consists of packing that is contained and compressed by the packing gland (A12).
1. If the packing leaks, tighten the two adjustment nuts (A15) on top of the packing gland (A12).
Note:
Tighten the nuts evenly and gently—just enough to stop the leak. Over tightening will
cause excessive torque and decrease packing life.
2. If the leak cannot be stopped by tightening the packing, replace the packing. See "Replacing
Packing" section.