KEYSTONE K-LOK SERIES H HIGH PERFORMANCE BUTTERFLY VALVES
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
INSTALLATION
The valves are shipped with flange gasket
surface protection. Before installing the valve,
remove the protection and carefully clean and
de-grease both surfaces with a solvent.
Series H1L and H2L - Lug style
1. Orient the valve with the directional flow
arrow (preferred direction) pointing in the
proper direction.
2. Insert the valve between the flanges until
the two bottom holes in the valve align with
the two lower flange holes.
3. Insert a bolt or stud through the flange and
thread it into the holes in the valve body.
This will allow the valve to center itself
properly for the installation of the flange
gaskets.
4. Install the flange gaskets and the remaining
flange bolting.
5. Use the crossover method to tighten all
flange bolting.
Series H1W and H2W - Wafer style
1. Orient the valve with the directional flow
arrow (preferred direction) pointing in the
proper direction.
2. Insert the valve between the flanges until
the alignment holes at either side of the
valve match the corresponding holes in
the flanges.
3. Insert a long bolt or stud through the flange
and thread it through the alignment hole.
This will allow the valve to center itself
properly for the installation of the flange
gaskets.
4. Install the flange gaskets and the remaining
flange bolting.
5. Remove the long bolts/studs from the lower
alignment holes and replace with correctly-
sized bolts.
6. Using the crossover method, tighten all
flange bolts.
VALVE CHECKOUT
1. Tighten the packing gland bolting just
enough to prevent shaft leakage. Over-
tightening will decrease packing life and
increase operating torque requirements.
2. Check the operation of the valve by stroking
it to 'full open' and 'full close'. To determine
the valve orientation of the disc, double
D's and keyways are aligned with the disc.
The valve disc travels clockwise to close.
3. For automated valves, set the air pressure/
electrical voltage for at least the minimum
given to operate the actuator. For pneumatic
actuators, do not apply more than 1.25 times
the pressure for which the actuator was
designed.
Note: for spring return actuators with
positioners, overpressure will cause excessive
time delay in the spring movement for the valve
disc to travel out of the seat.
OPERATION
The H-Series K-LOK has been designed to
require a minimum of maintenance. Generally,
only maintenance on the packing box is
required.
MAINTENANCE
If shaft leakage is observed through the packing
box, tighten the gland nuts.
Note: do not over-tighten packing box gland
nuts. Over-tightening will increase the torque
required to operate the valve. When tightening
the gland nuts, use half-turn increments until
leakage has stopped.
DISASSEMBLY
To begin disassembly, refer to the parts list
(Figure 2) and proceed as follows:
WARNING
Depressurize the valve and associated piping
before disassembly. Failure to do so may cause
serious personal injury and/or equipment
damage.
1. Remove the valve from the line. Clean
the valve according to proper cleaning
procedures as outlined by the plant or
according to a prescribed procedure.
2. Remove the actuator and relevant
connecting key. Note the actuator position
relative to the valve.
CAUTION
Throughout disassembly and assembly, always
use cardboard or brass shims to protect the
valve body, disc, flange and sealing surfaces from
damage. Failure to do so may result in serious
damage to the valve.
Removing the disc-to-shaft wedged pin
connections
1. Open the disc to its full open position.
Note: on valve sizes DN 250 (NPS 10) and
larger, it is recommended that two workers
perform the wedged pin (5) removal process.
2. Place the disc in a vice, see Figure 1.
3. Locate a steel punch on the wedged pins
and strike the punch with a hammer.
Note: some of the weld on the three wedged
pins may need to be removed by grinding.
FIGURE 1
Valve properly clamped in place
2
