LowFlow Mark 708ME Series with Motor Valve - Manual (Page 4)

Trim Removal Instructions
Referring to drawing below:
1.
Position valve stem at mid-stroke.
2. Unthread the four bolts (5) and remove body.
3. Loosen hex nuts and indicator washer (1). Unthread
stem from motor shaft and remove nuts and washer
(1).
4. Remove the hex nuts (6) and lift motor from valve.
5. Push stem (7) through body. (DO NOT push stem
threads through packing unless stem is being re-
placed).
6. Slide plug (3) off stem.
7. Remove and install new seat (8) – optional.
8. Install new gasket (4). Install new packing (2) if stem
is removed.
9. Assemble in reverse order. Note: stem must be
threaded into connector until bottomed out to
maintain stroke adjustment.
Ordering Spare Parts
Use only genuine Jordan Valve parts to keep your valve
in good working order. So that we can supply the parts,
which were designed for your valve, we must know ex-
actly which product you are using. The only guarantee to
getting the correct replacement parts is to provide your
Jordan Representative with the valve serial number. This
number is located on the valve identifi cation tag. If the
serial number is not available, the parts needed for your
valve might be determined using the following informa-
tion: Model Number, Valve Body Size, Seat Material and
Cv Rating, Spring Range and Set Point, Trim Material, Part
Name - Number and Quantity.
NOTE: Any parts ordered without a valve serial number
that are found to be incorrect are subject to up to a mini-
mum 25% restock charge when returned.
Trouble Shooting
If You Experience Erratic Control:
Oversizing can cause cycling or hunting (recalcu-
late the size required).
Undersizing can cause the control point to drop off
under peak loads (increase the trim size).
Inlet pressure to the valve maybe varying signifi -
cantly and the controller may not be following it
(adjust the controller).
Control loop may require equal percentage trim if
high rangabilities are being utilized.
Steam traps may need reconditioning.
Safety relief valves may be leaking.
Valve stroke may be out of adjustment or there may
be foreign matter in the valve preventing full move-
ment.
If You Experience Insuffi cient Flow:
Check shutoff valves to be sure they are fully open.
Inlet pressure to valve may be insuffi cient to pro-
vide the needed fl ow (check the inlet pressure with
a pressure gauge).
Strainers should be checked for clogging and
blown down if needed.
Steam traps may need reconditioning.
Dirt in the trim may prevent the valve from passing
its full capacity.
Diaphragm failure or insuffi cient air pressure to re-
verse acting (air-to-open) actuators would prevent
the valve from properly stroking open. Incorrect ac-
tuator spring adjustment in reverse acting actuators
would prevent the valve properly stroking open.
If You Experience Overpressure (outlet):
Dirt in the trim may prevent valve from shutting off.
Diaphragm failure, incorrect actuator spring adjust-
ment, or insuffi cient air pressure to direct acting
(air-to-close) actuators would prevent the valve
from properly stroking closed.
-4-
Item Description
1 Lock Nuts/ Indicator
2 Packing
3 Plug
4 Gasket
5 Bolts
6 Hex Nuts
7 Stem
8 Seat