Operation
J Flow Controls valves provide tight shut off when
used under normal conditions and in accordance
with J Flow Controls published pressure and
temperature chart. All valves are provided
standard with a locking device for either the open or
closed position. It is advised to never leave the
valve in a partially open position as seat life can be
reduced.
J Flow Controls DM4800 MS series are a ¼ turn
valve which closes in the clockwise direction. The
valves handle points at the flow direction, so when
the handle is in line with the pipeline, the valve is
open. Subsequently, when the handle is parallel to
the pipeline, the valve is closed. There is also a
notch on the valve stem indicating flow as well.
Make sure when installing an actuator that the
position of the valve matches the actuator.
Media which may solidify, crystallize or polymerize
should never be allowed to remain in the ball valve
cavies unless regular maintenance is performed.
Maintenance
J Flow Controls valves are designed to easily be
disassembled and reassembled in the field for easy
service. It is imperave that before compleng any
maintenance on a J Flow Controls valve, that the Safety
Precauons secon of this I&M is reviewed.
Ball valves normally do not require an internal lubricant
or roune maintenance once installed. Packing can be
adjusted if the valve has stem leakage or if the stem
seems loose. See the Troubleshoong secon of this
I&M for more informaon.
Internal maintenance by replacing the packing, seats,
seals, ball, or stem if any piece is damaged will require
disassembly (see Valve Disassembly).
Troubleshoong
STEM LEAKAGE
Examine the disk springs for damage. If they are in good
condion, then ghten the gland nut unl disk springs
are firmly compressed, then back nut off 1/16th of a
turn. If damaged, take apart the stem down to the
gland, fit new disk springs with their outer edges
touching, replace and reghten with the stem nut. Any
further maintenance will require the dismantling of the
valve.
LEAKAGE AT BODY JOINT
Check to see if the body connector bolts have been
ghtened. If loose, ghten body bolts according to the
torque requirements given in Table A. If valve sll leaks,
the valve has to be disassembled and body seals will
need replaced.
IN-LINE LEAKAGE
Posion the valve in the closed posion. If leakage
occurs while the valve is closed, ball sealant surface or
seat could be damaged and the valve will have to be
disassembled.
2
www.jflowcontrols.com
sales@jflowcontrols.com
J Flow Controls
4665 Interstate Dr.
Cincinna, OH 45246
Toll Free: 866-95-JFLOW (53569)
Local: 513-330-6354
Fax: 513-731-6939
DM 4800 Series MS Ball Valve
Installaon – Maintenance Manual
Document #: IM-DM4800 MS-01
Rev Date: 2010-02-01
Installaon & Maintenance for J Flow DM4800 Series Metal Seated Ball Valve
