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IOM-DM MPT100-2018

Page 2

. Installation of the Flo-Tite Multi-Port DM MPT100 valve is accomplished by inserting the valve between

flanges attached to piping and supplied by others and attaching the valve to the mating flanges with fasteners
of the size and type specified by industry standards. Fasteners should be tightened in a “star” pattern.

Caution

– Ensure that mating flanges are of the same size, type and pressure rating as the valve and that

fasteners are of the size and type approved for the flange.

. Valves with actuators should be checked for actuator-valve alignment. Angular or linear misalignment

will result in high operational torque. Electric and/or pneumatic connections should be made in accordance
with the correct actuator IOM instructions.

C. OPERATION:

. Valve Flow Path is indicated by markings on the top of ball valve stem. The illustration on the last page

shows standard valve position at the time of shipment.

. Flo-Tite model DM MPT100 valves can be operated with either electric or pneumatic actuators. For

instructions on installation and operation, refer to the IOM for the correct actuator. Prior to actuator
installation, please check the flow path of the valve as indicated by marking on the top of ball valve stem as
shown in the illustrations on the last page. After actuator installation, the valve should be check for valve stem
alignment. Axial misalignment will result in high operational torque and unnecessary wear on the stem seal.

. Flo-Tite model DM MPT100 valves may include one of several different styles of limit switches and

positioners. Please refer to the appropriate IOM for each device.

MAINTENANCE:

CAUTION

– Ball valves can trap fluid in the ball cavity when closed. Be prepared to capture and manage

any liquid retained in the valve body when disassembling the valve.

WARNING

–

If the valve has been in hazardous fluid service, review applicable MSDS sheet and

decontaminate the valve before disassembly. All persons involved with the disassembly should wear
personal protective equipment such as aprons, gloves, face shield, etc. to prevent personal injury.

Access to the valve internals starts with relieving pressure in the pipeline. Turn the valve handle to the 45
degree, half open, position and flush the line, when applicable, to remove any hazardous material from the
line. Consult the metal tag attached to the valve body to determine the correct seat and seal materials. Repair
kits can be ordered from the local Flo-Tite Representative. This should be done prior to any disassembly
work.

CAUTION

- Valves with actuators, limit switches or positioners should have these devices disassembled from

the valve prior to disassembling of the valve.

WARNING

Use extreme caution disconnecting any electrical and/or pneumatic sources to the valve to protect
against personal injury. Isolate the valve actuator prior to disconnecting.
Stem Packing

Stem seal leakage may be corrected without disassembly. Tighten the packing gland nuts one flat at a time
alternating between nuts, until leakage stops. If leakage continues, or the valve’s operating torque becomes
excessive, the seals are worn and replacement of the packing will be necessary.