Jordan Valve LowFlow Mark 709 7M Installation and operating instructions

3170 Wasson Road • Cincinnati, OH 45209 USA
Phone [phone] • Fax [phone]
E-Mail: [email protected] • www.jordanvalve.com
I&M 709
Installation & Maintenance Instructions for
Mark 709 7M & 14M Actuator and Motor Valve
Warning: JordanLowFlowControlValvesmustonlybeused,installed,andrepairedinaccordancewiththeseInstallation
& Maintenance Instructions. Observe all applicable public and company codes and regulations. In the event of leakage or
othermalfunction, call a qualified serviceperson; continued operation may causesystem failure or a generalhazard.
Before servicing any valve, disconnect, shut off, or bypass all pressurized fluid. Before disassembling a valve, be sure to
releaseallspringtension.
PROTECTVALVESWITHLINESTRAINERS
Please read these instructions carefully!
Your Jordan Valve product will provide you with long, trouble-
free service if it is correctly installed and maintained. Spending
a few minutes now reading these instructions can save hours
of trouble and downtime later. When making repairs, use only
genuine Jordan Valve parts, available for immediate shipment
fromthefactory.
Ideal Installation Schematic
Preferred Installation
1. To control very low flow rates, Mark 709 control valves
are often provided with trims having very small
clearances. To keep this trim functioning properly, it is
essentialthatthe fluid flowingthroughthe valve be clean.
2. To protect the valve from grit, scale, thread chips and
other foreign matter, ALL pipelines and piping
componentsshouldbe blown outand thoroughly cleaned
before the installation process begins.
3. Shutoff valves, pressure gauges, and by-pass piping
should be installed as indicated in the Ideal Installation
Schematic to provide easier adjustment, operation and
testing.
4. A line strainer should be installed on the inlet side of
the valve to protect it from grit, scale, and other foreign
matter. A 0.033 perforated screen is usually suitable for
this purpose. Line strainers are available from Jordan
Valve.
5. For best control, 3’-0” straight sections of pipe should
be installed on either side of the valve.
6. In preparing threaded pipe connections, care should be
exercised to prevent pipe-sealing compound from
getting into pipelines. Pipe sealing compound should
be used sparingly, leaving the two end threads clean.
Jordan uses, and recommends, thread sealer Teflon
ribbon.
7. The flow arrow on the valve body must be pointed in
the direction of the flow. Ideally the valve should be
installed in the highest horizontal line of piping to provide
drainage for inlet and outlet piping, to prevent water
hammer, and to obtain faster response.
8. If possible, install a relief valve downstream from the
valve. Set at 15 PSI above the control point of the valve.
9. In hot vapor lines, upstream and downstream piping
near the valve should be insulated to minimize
condensation.
10.Evaluateinlet and outletpipefriction losses andvelocities
to decide when smaller outlet piping might cause,
excessive back pressure. When required, a standard
tapered expander connected to the outlet of the valve
is recommended.
11.Where surges are severe, a piping accumulator is
recommended.
12.On steam control applications, install a steam trap with
sufficient capacity to drain the coil or condenser. Be
sure to have a good fall to the trap, and no
backpressure. Best control is maintained if the coil or
condenser is kept dry.
Start-Up Procedure
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1. Be sure that the action of the control valve and of the
controller are such that you achieve the desired results.
The action can be changed if needed using the
instructions shown in “Reversing Action”.
Electrical Connection
or Pneumatic Control Signal
Reservoir
Pump
14
R6
45
1
22
1
1
1
4
31 Shut-off Valve
2 Pipe Union
3 Strainer & Drain Valve
4 Pressure Gauge
5 MK709
6 Relief Valve

Maintenance
2. The control valve has been pre-set by Jordan Valve,
however, finer adjustment may be required to
compensate for the system conditions of your
application.
3. With inlet, outlet and bypass shutoff valves closed, and
no pressure in the down stream line, fully open the outlet
valve. Slowly open the inlet valve just enough to start
flow through the control valve. Increase the flow
gradually by slowly opening the inlet shutoff valve. Do
not fully open the inlet valve until you are sure that the
controller and control valve have control of the system.
Usually, the handwheel on the inlet valve will turn freely
when this point is reached.
4. To shut off the line fluid, close the inlet shutoff valve
first, and then close the outlet shutoff valve.
Caution: Make certain that there in no pressure in the
valve before loosening any fittings or joints. The
following steps are recommended:
1. Close the inlet shutoff valve.
2. Allow pressure to bleed off through the downstream
piping. Do not attempt to reverse the flow through the
valve by bleeding pressure from the upstream side of
the valve
3. When the pressure gauges indicate that all pressure
has been removed from the system, close the outlet
shutoff valve, and the valve may be serviced.
Note: refer to the drawing at the end of this document
for description and proper orientation of parts.
To reduce maintenance time, refer to proper figure and follow
steps indicated below for applicable maintenance operation.
Proposed Maintenance Procedure Follow Steps….
Renewing stem packing……………………..Packing
Replacement
Valve disassembly, inspecting
Parts, replacing plug or seat ring…………...Valve disassembly
Valve reassembly……………………………..Valve Reassembly
Actuator spring preload adjustment………..Actuator Spring
Load Adjustment
Actuator maintenance……………………......Actuator
Maintenance
Changing valve action……………………… Reversing Action
Motor valve seat spring preload…………….Motor Valve Seat
Spring Preload
Renew valve plug stem packing if control valve has been in
service beyond normal maintenance, and packing shows
signs of wear. Wear will be indicated by leakage, which
cannot be corrected by minor tightening of the packing
flange.An additional packing ring can be installed to
overcome minor leakage without dismantling the control
valve or breaking valve plug connection.
1. Remove the actuator from the bonnet. (See Removing
Actuator from Valve.)
2. Remove all of the packing and discard. Clean valve
stem and packing box thoroughly. The valve stem may
be dressed with a very fine crocus cloth, but generally
it is best not to as the stem has a fine machined finish.
Useapproved non-residue-forming solventfor cleaning.
Wipe dry with clean cloth.
3. Insert a new set of packing in packing box. Press each
ring down in place with a tube as it is installed.
4. After packing is installed, assemble packing adapter,
gland, and gland nuts. Tighten the nuts hand tight.
5. The final packing adjustment should be made with the
valvepressurized and thepacking tightened justenough
to stop any leakage, while stroking the valve.
Excessive tightening could cause the stem to stick
and result in improper valve operation due to high
friction forces.
PackingReplacement
RemovingActuatorfrom Valve
1a. Direct Acting Actuator (ATC): Shut off pressure to the
actuator and remove supply tubing from the actuator
case.
1b. Reverse Acting Actuator (ATO): Apply approximately 6
psig air pressure to the actuator to lift the plug off of
the seat.
1c. Motor Valve (Mark 709MV): Position the bottom inlet
to full open and disconnect all electrical connections.
2. Remove the actuator from the valve as follows: loosen
the two stem nuts and move them down the stem.
Lock these nuts together. Remove the two nuts that
secure the support legs to the bonnet. Using a wrench
on the nuts and on the flats of the actuator stem, turn
the valve stem (while holding the actuator stem in place)
until the stems disengage. The actuator will be free of
the valve.
Body & Bonnet Disassembly
1. For actuator removal, refer to section on “Removing
Actuator”.
2. Remove the body/bonnet bolts and carefully separate
the body from the bonnet so as not to damage delicate
trim components.
3. Remove stem nuts and indicator. Loosen the packing
gland nuts and withdraw the stem and plug out of the
bonnet. (The smaller trims have a one-piece stem and
plug, which can be withdrawn through the packing.)
4. With a socket wrench, remove both seats from the
body. Remove and discard the body/bonnet gasket.
5. Soft seats are disassembled by removing the seat cap
from the seat and then the soft seat can be removed.
6. Clean all parts with an approved non-residue-forming
solvent. Remove encrusted material with a very fine
Crocus or aluminum oxide cloth. However, do not use
these abrasives on the seating surface or the trim
surface (the portion of the plug that enters the seat
bore.) The machining tolerances on these surfaces are
so closely controlled that you might change the valves
flow characteristic.
7. Inspect all parts and replace and worn or damaged
parts. It is always advisable to replace seals and
gaskets. DO NOT attempt to resurface seating surfaces
of the plug or seat. Seats and plugs are only sold in
factory-matched sets.
ValveReassembly
1. Soft seated valves: insert soft seat into the seat cavity,
install the seat cap and tighten.
2. Lubricate the seat threads with a lubricant such as
NO-LOK and thread both seats into the body. Torque
to values shown.

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3. Guided trim: coat the guide portion of the stem with
MOLYKOTE G-Rapid Spray lubricant or an equivalent
light lubricant suitable for your service. Assemble plug
to stem.
4. Insert the stem into the bonnet. Set the gasket around
the boss on the bonnet. Carefully assemble the bonnet
to the body and allow the plug to center into the seat.
Push down on the stem to be sure that the plug has
fully engaged the seat. Hand-tighten the body bolts.
* for ¼” Motor valves, use ½” torque values
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of 2.
5. Install the packing as described in “Packing
Replacement”.
6. While holding the plug firmly in position in the bottom
seat, secure the body to the bonnet with the bolts.
Torque bolts evenly to the values shown.
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7. Reassemble the two stem nuts and indicator all the
way onto the stem threads. Lock to the actuator.
8. If the actuator is reverse acting (ATO), apply
approximately 6 psig air pressure to the actuator.
8a. If MOTOR VALVE, position the bottom seat to full open
9. Insert support legs into the bonnet flange and thread
the stem into the actuator stem. Hold the actuator stem
withawrench to prevent itfromturning. When the stems
are engaged enough to bring the support legs into full
contact with the bonnet flange, install the nuts onto
support legs and tighten.
(You can press down on the actuator to compress the
springs and bring the legs into contact with the bonnet
flange.) The actuator spring preload must be adjusted;
refer to “Actuator Spring Preload Adjustment”. For Motor
Valve see “Motor Valve Seat Spring Pre-Load”.
∗ Standard Bolting
Actuator Spring Preload Adjustment
1. The two stem nuts should be loosened and threaded
down on the stem and then locked together.
2. A regulated air supply must be provided to the actuator.
Connect the air to the lower case for reverse acting or
to the upper case for direct action actuators.
3. Standard actuators have ranges of either 3-15 psig or
6-30psig.The range isstampedon the valvenameplate.
These instructions will assume that the range is 3-15. If
yours differs, substitute the appropriate pressure where
these instructions refer to 3 psig.
4a. Direct Acting Actuator (ATC): Slowly increase the air
pressure up to 3 psig while observing the stem for
movement. If there is movement at less than 3 psig:
thread the valve stem into the actuator stem, wrenching
on locked stem nuts and keeping the actuator stem
from turning to increase the spring preload. If there is
no movement at 3 psig: thread the valve stem out of
the actuator stem to decrease the spring load.
4b. Reverse Acting Actuator (ATO): The bottom seat is
closed against upward fluid thrust by actuator spring
force. Total compression placed on the actuator spring
must be sufficient to provide preload plug force required
to close the valve. If preload adjustment is made with
no pressure in valve body, then, when the control valve
is placed in operation, additional compression must be
placed on the spring to provide valve closure force.
With proper adjustment, valve will close tightly and will
notbegintoopen until the preload pressureisexceeded.
Slowly increase the air pressure up to 3 psig while
observing the stem for movement. Adjust spring preload
until valve just starts to open when 3 psig air pressure
is supplied to the actuator diaphragm. If there is valve
movement at less than 3 psig: thread the valve stem
out of the actuator stem, wrenching on the locked stem
nuts and keeping the actuator stem from turning to
increase spring preload. If there is no valve movement
at 3 psig: thread the valve stem into the actuator stem,
wrenching on the locked stem nuts and holding on to
the actuator stem to keep it from moving, to decrease
spring preload.
Actuator Maintenance
Disassembly and Inspection of Actuator
Note:The actuatorstemhas tworetainingrings. The purpose
of these rings is to maintain compression on the springs (to
keep them in place) should the actuator be removed from
the valve bonnet. The upper ring functions with reverse
action and the lower ring functions with direct acting
actuators.
1. Follow instructions under Maintenance section to
remove valve from line.
2. Remove the actuator as described in “ Removing Valve
Actuator”.
3. Direct Acting Actuator (ATC): separate the cases by
removing the bolts. Use a wrench on the flats of the
actuator stem to prevent it from turning and remove
the bolt and lockwasher. Lift off the diaphragm washer,
diaphragm, diaphragm plate, and ThredSeal. Remove
the springs.
If the actuator stem is to be removed, remove one
retaining ring and push the actuator stem out. Remove
and discard the o-ring and two backup rings.
4. Reverse Acting Actuator (ATO): separate the cases
by removing the bolts. Remove the springs. Use a
wrench on the flats of the actuator stem to prevent it
from turning and remove the bolt and lockwasher. Lift
off the diaphragm plate, diaphragm, diaphragm washer,
and,ThredSeal.
If the actuator stem is to be removed, remove one
retaining ring and push the actuator stem out. Remove

Direct Acting
40
41
20
21
1
42
19
18
12
32
26
23
22
24
25
29
10
11
6
3
NotShown
NotShown
4
35
1
IN OUT
(Common)
IN
38
34
39
2
33
8
5
31
7
9
28
36
37
16
13
30
27
17
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1 Actuator can be field converted to reverse
acting(ATO).
14
15

Double Packing
TFECHEVRON
PACKING BRAIDED PACKING
Reverse Acting

and discard the o-ring and two backup rings.
5. If there is a need to clean the parts, use a solvent
that will not harm Buna-N elastomers, such as
Stoddard solvent.
Reassembly of Actuator — 7M & 14M
1. Replacement of the actuator stem seal is
recommended. The o-ring and back–up rings are
standard Buna-N, size 112. Lubricate and install
the two back-up rings and the o-ring into the cavity
in the lower case. The back-up rings are installed
on either side of the o-ring.
2. The retaining ring closest to the top end (bolted) of
the actuator stem must be in place. The retaining
ring nearest the other end ((with wrench flats) must
be removed.
3a. Direct Acting Actuator (ATC): attach the following
parts to the top of the actuator stem in the order
indicated: ThredSeal, diaphragm plate, diaphragm,
diaphragm washer, and lockwasher. Secure them
with the bolt. Hold the actuator stem on the wrench
flats and tighten the bolts.
3b. Reverse Acting Actuator (ATO): attach the following
parts to the top of the actuator stem in the order
indicated: ThredSeal, diaphragm plate, diaphragm,
diaphragm washer, and lockwasher. Secure them
with the bolt. Hold the actuator stem on the wrench
flats and tighten the bolt.
4a. Direct Acting Actuator (ATC): hold this assembly
by the bolt head in a vise, stem pointing upward.
Install the springs over the dimples in the diaphragm
plate. Take the lower case and carefully install it
onto the actuator stem by firmly pressing the stem
through the stem o-ring seal, keeping the springs
inplace. Install the retaining ring into the groove in
the actuator stem. This will keep the springs
compressed and prevent them from coming out of
place.
4b. Reverse Acting Actuator (ATO): install this assembly
into the lower actuator case by pressing the actuator
stem through the stem o-ring seal. Then install the
lower retaining ring onto the actuator plate. Next,
install the springs over the dimples in the diaphragm
plate.
5. Position the flange of the diaphragm on the flange
of the lower actuator case and align the holes.
Attach the upper actuator case with the bolts.
6. Reassemble the actuator to the valve as described
in “Valve Reassembly” steps 8 & 9.
ReversingAction
Changing the valve action from direct to reverse acting
or from reverse to direct acting. Reversing the action
of the actuator reverses the action of the Mark 709
ControlValve.The same partsareused for either action.
1. Disassemble the actuator as described in “Actuator
Maintenance”.
2. Reassemble the actuator with the desired action.
Refer to “Actuator Maintenance”. To change the
action of a motor valve, refer to Motor Manual IM-
0577and Electric Connectiondrawing95/C/032783,
which are provided with all Mark 708MV motor
valves.
Motor Valve Seat Spring Preload
1. Position the bottom seat to be full open.
2. The two stem nuts should be loosened and
threaded down the stem and then locked together.
3. Slowly stroke the motor to closed position, while
rotating valve stem and stem nuts back and forth
(approximately ¼ turn). Caution: valve stem should
rotate freely. When it no longer rotates freely, the
plug is in contact with the bottom seat, and the
motor must be stopped or damage may occur. If
required, the valve stem may be threaded into the
actuator stem to allow motor to complete stroke.
4. With motor in full closed position and stopped by
limit switch, rotate the stem down until the plug is
in contact with the seat, and turn and additional ¼
- ½ turn to preload the seat.
5. Position motor to bottom seat open position, and
confirm that the motor is stopped by the limit switch
prior to the plug reaching the upper stop. Without
rotating the stem, thread the stem nuts up and lock
them against the actuator stem.
Note: limit switches and high/low set points are
factory-set. If command signal range will not fully
stroke the valve, refer to electrical connection
drawing 95/C/032783 for set point adjustment
procedure. With seat spring preload set, if plug hits
upper stop prior to limit switch, the limit switch will
require adjustment; consult factory for procedure.

3170WassonRoad• Cincinnati, OH 45209
Phone[phone] •Fax[phone]
PhoneToll-Free:800-543-7311
E-Mail:[email protected]
URL:www.jordanvalve.com
Illustration & Part List 709IM/0803
•Erratic Control – oversizing can cause cycling or
hunting (recalculate 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 significantly 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 movement.
•Insufficient Flow – check shutoff valves to be sure
they are fully open. Inlet pressure to valve may be
insufficient to provide the needed flow (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 insufficient air pressure to reverse
acting (air-to-open) actuators would prevent the valve
from properly stroking open. Incorrect actuator spring
adjustment in reverse acting actuators would prevent
the valve properly stroking open.
•Overpressure (outlet) – dirt in the trim may prevent
valve from shutting off. Diaphragm failure, incorrect
actuator spring adjustment, or insufficient air pressure
to direct acting (air-to-close) actuators would prevent
the valve from properly stroking closed.
Trouble Shooting
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 exactly which product
you are using. The only guarantee to getting the correct
replacement parts is with the valve serial number. This
number is located on the valve identification tag. If the serial
number is not available, the parts needed for your valve might
be able to be determined with the following information:
· Model Number
· Valve Body Size
· Seat Material and CV rating
· Spring Range and Set Point
· Trim Material
· Part Name – Number and Quantity
(See parts list chart)
NOTE: Any parts ordered without a valve serial number that
are found to be incorrect are subject to up to a minimum 25%
restock charge when returned.
7
6
5
8
36
45
Shown 90° out of position
47
49
46
48
28
11
9
10
3