Watts LFB6801 - Manual

Installation
I. Threaded-end (LFB6800):
1. The above listed standard valves are bidirectional and as
such, can be installed for flow in either direction.
2. When installing threaded-end valves, be sure that the
threads on the mating pipe are free from excessive grit, dirt
or burrs. Take care to assure that any pipe sealants used
are not so excessively applied to the pipe threads that the
valve cavity becomes fouled.
II. Sweat-end (LFB6801): To protect seats and seals from high
temperatures encountered while soldering, these valves must
be disassembled prior to soldering.
LFB6801 Series
1. Remove body center section from adapters by removing
one body bolt and loosening others.
2. Solder end adapters onto copper tubing system, orienting
adapters to required valve position. One of the two adapter/
tubing assemblies must allow rotation to match alternate
adapter bolt pattern.
3. After soldering and cool-down, install body assembly using
new body seals provided and re-torque bolts as follows:
(Use sequence shown on back page).
Valve Operation
1. All series Watts ball valves feature 1 ⁄
4
turn operation. Turning
the valve handle 90° clockwise will fully close the valve while
a 90° counterclockwise rotation will fully open the valve. The
valve handle also serves as a ball orifice position indicator.
When the valve handle is parallel to the pipe, the valve is open,
when perpendicular to the pipe, the valve is closed.
2. All series Watts ball valves are designed to provide optimum
bubble-tight performance when properly selected in accor-
dance with the valve’s pressure/temperature rating, unless
otherwise noted in seat material selection chart.
3. To provide the longest possible service-life, a hand-operated
ball valve should be operated in either it’s fully open or fully
closed position. If an intermediate operating position is to be
utilized, consult your Watts agent. Excessive pressure drops
could adversely affect service life of the valve.
4. All Watts valves are factory assembled using an F.D.A. ap-
proved lubricant. Valves can be ordered from the factory
without lubricant. The standard factory lubricant can be
removed, if objectionable, by disassembling the valve and
solvent washing.
5. The below listed torques are the normal expected maximum
break-away torques. These values represent the force re-
quired to begin to open the valve. Typically, this break-away
value is the maximum torque requirement of the valve during a
closed to open, opened to closed cycle. Bear in mind that these
values have been confirmed by laboratory testing of each valve
while pressurized with water to the valve’s maximum pressure
rating. Certain highly viscous or abrasive services could cause
an increase in torque requirements.
Maintenance
During it’s service life, the only maintenance that may be required
by your Watts ball valve should be periodic stem seal adjust-
ment. If leakage at the stem is noted, simply tighten the valve
stem gland nut until leakage subsides. It is impractical to predict
frequency of stem adjustment as it is influenced by such factors
as frequency of cycling and service media.
As is the case with any valve on the market today, it is important
that stem leaks do not go unattended. Lack of maintenance of
stem leakage could cause a premature need to replace stem
seals.
If operating temperature of system is substantially lower or
higher than 80°F (27°C), initial stem packing adjustment may be
required to prevent leakage.
Valve Size Body Bolt Torque (in.-lbs.)
1 ⁄
4
", 3 ⁄
8
", 1 ⁄
2
" 30 ± 5
3 ⁄
4
" 100
1" 200
1 1 ⁄
4
" 200
1 1 ⁄
2
" 300
2" 400
TABLE 1
Series LFB6800
IS-B6800 Series LFB6800
Installation, Operation and Repair Manual
WARNING !
Read this Manual BEFORE using this equipment.
Failure to read and follow all safety and use information
can result in death, serious personal injury, property
damage, or damage to the equipment.
Keep this Manual for future reference.
NOTICE
IMPORTANT