Jordan Valve Mark 89 User Manual

I & M Mark 89 / 89MX

3170 Wasson Road • Cincinnati, OH 45209 USA

Phone [phone] • Fax [phone]

[e-mail] • www.jordanvalve.com

Installation & Maintenance Instructions for

Mark 89 Temperature Regulators (1½” - 2”)

Warning: Jordan Valve Temperature Regulators must only be used, installed and repaired in accordance with these
Installation & Maintenance Instructions. Observe all applicable public and company codes and regulations. In the
event of leakage or other malfunction, call a qualied service person; continued operation may cause system failure
or a general hazard. Before servicing any valve, disconnect, shut off, or bypass all pressurized uid. Before disassem­bling a valve, be sure to release all spring tension.

Please read these instructions carefully!

in the direction of ow. The valve may be installed ver-

tically or horizontally without affecting its operation.
Your Jordan Valve product will provide you with long-term,
trouble-free service if it is correctly installed. Spending a
few minutes of your time reading these instructions now
may save hours of trouble and downtime later.

For best control, 3’ 0” straight sections of pipe should 7.

be installed on either side of the valve.

To minimize condensation in hot vapor lines, upstream 8.

and downstream piping near the regulator should be

insulated.

Installation

For injection heating applications, the regulator should 9.

be installed above the maximum water level in the

tank, or a check valve should be installed to prevent

5

4

1

2

1

1

4

3

4

1

2

1

1. Shut Off Valve

2. Pipe Union

3. Strainer and Drain Valve

4. Pressure Gauge

5. Jordan Regulator

6. Relief Valve

7. Thermal Bulb

7

R

6

To protect the temperature regulator from grit, scale, 1.
thread chips, and other foreign matter, all pipe lines
and piping components should be blown out and
thoroughly cleaned before the valve is installed.
Shutoff valves, pressure gauges, and bypass piping 2.

water from backing up into the regulator.

For best regulation, the temperature regulator should 10.

be installed as closely as possible to the unit in which

the temperature is being controlled.

On steam control applications, install a steam trap of 11 .

sufcient capacity to drain the coil or condenser. Be

sure to have a good fall to the trap, and no back pres-

sure. Best control is obtained when the coil or con-

denser is kept dry.

Bulb Installation

The thermal system is hermetically sealed unit con­sisting of a sensing bulb, capillary tubing, protective
armor, and actuator assembly. This unit contains the
thermostatic charge that operates the temperature
regulator. Please do not tamper with it. In case the
charge is lost, the thermal system must be replaced
as a complete unit. It is not repairable in the eld and

must be returned to the factory for repairs.
should be installed as indicated in the diagram to pro­vide easier adjustment, operation, and testing.
In preparing threaded pipe connections, care should 3.
be taken to prevent pipe sealing compound from get­ting into the pipe lines. Pipe sealing compound should
be used sparingly, on male threads only, leaving the
two lead threads clean. Jordan uses, and recom­mends, Seyco #2415 thread sealer Teon ribbon.
A line strainer should be installed on the inlet side of 4.
the temperature regulator to protect it from grit, scale
and other foreign matter. A 20-mesh Monel screen
is usually suitable. Line strainers are available from
Jordan Valve.
Install the regulator in the highest horizontal line of 5.
piping to provide drainage for inlet and outlet piping,
to prevent water hammer, and to obtain faster regula­tion.
The ow arrow on the regulator body must be pointed 6.

Correct Installation 1. - For effective temperature control,
correct installation of the sensing bulb is essential. For
best results, the bulb should be installed at a point of
true representative temperature and where there is
good circulation. A thermometer or other temperature
sensing device (if used) should be placed as close as
possible to the sensing bulb of the regulator.
Handle the capillary and armor carefully so they are 2.
not crushed, kinked, or twisted. A bend of 4½” radius
or larger is recommended.
Horizontal Mounting 3. - when the bulb is to be mounted
horizontally, it must be turned so that the work TOP
(stamped on the adapter) faces upward.
Vertical Mounting 4. - No special precaution is required
when the bulb is mounted vertically pointing down.
Inverted Mounting 5. - A special capillary is required if
the tip of the bulb will be higher than the capillary

end. The temperature regulator equipped with a stan­dard capillary will not function properly in an inverted
position.
Insertion 6. - For accurate control, the entire length of
the bulb should be inverted. Avoid locating a bulb in
the direct path of steam or water. Never lay the bulb
on the bottom of a tank. Approximately 8” is sufcient
distance from the source of heat or coolant to the
sensing bulb.
Pipeline Mounting 7. - When installing the sensing bulb
in piping, be sure that the pipeline is at least twice the
diameter of the sensing bulb so that free ow is ob­tained around the bulb.
Finned Bulbs 8. - Finned bulbs should be installed at
right angles to the air movement. Good circulation is
required to sense the average temperature.
When the bulb is installed at a point higher than the 9.
regulator itself, the range will probably be somewhat
lowered. Conversely, the range will be raised if the
bulb is installed below the regulator.

Trouble Shooting

Erratic Control:

An oversized valve causes cycling or hunting. An 
undersized valve causes temperature to drop under
peak loads. Recalculate required size from Jordan
Catalog TCV.
Inlet pressure may be low.
Steam traps downstream may need reconditioning.
Foreign matter may be lodged in valve seats.
Valve stroke may be out of adjustment.

Underheating:

Be sure that by-pass Seats are fully open.
Be sure that inlet pressure is adequate.
Clean line strainer screens.
Clean steam traps and be sure that they are working 
properly. If the return line from the trap is cool, the
steam coil may be clogged.

Overheating:

Overheating is often caused by foreign matter holding 
the by-pass seats in the open position. Inspect and
clean seats or replace them.
Check stroke adjustment.
Check for damage or failure of the thermal system.

Undercooling or Overcooling:

Be sure that coolant is circulating properly and that all 
steps have been taken as indicated for underheating
or overheating in items 2 and 3 above.

or hot water, or cooled with cold water or crushed ice. Ob­serve the valve stem while alternately heating and cooling
the bulb. If the stem does not move, it is likely that the ther­mal system has lost its ll. The thermal system is hermeti­cally sealed and cannot be repaired in the eld. It must be
replaced by a complete, new thermal system or the old unit
must be repaired at the factory.

Start Up

Close the inlet and outlet shut-off valves.1.
Slowly open the by-pass, and begin heating or cooling 2.
action.
Fully open the inlet shut-off valve. Then slowly open 3.
the outlet shut-off valve.
Close the by-pass valves when the approximate tem-4.
perature is reached.
Allow approximately 30 minutes to reach stable op-5.
eration before attempting to adjust the temperature
setting (and after each new setting).
To change the control temperature, rotate the adjust-6.
ing wheel downward to decrease and upward to in­crease the temperature setting.

Valve Seats

A. Disassembly

The valve seats in all Jordan regulators are lapped to
a light band atness. Maintaining such tolerances is of
great importance for your assurance of excellent con­trol and tight shut-off. Do not use metallic objects in
removing the seats. Care in handling is important.

Close shut-off valve on each side of the regulator.1.
Remove the regulator from the line.2.
Note the scribe line on the side of the valve body and 3.
the caps. Secure one of the outlet cap hexes (1) in a
vise. Remove the cap screws (2) from the other cap
and lift the cap straight up. Please note that there is
an index pin secured in the valve cap that ts into the
index pin hole in the valve plate (3).
Next remove the valve plate and place it on the bench 4.
with the lapped surface up. You will notice that there
is also a locating pin which aligns the valve plate with
the disc guide. The scribe line on the outside of the
valve cap and the valve body indicates that this locat­ing pin should be on this side.
Now remove the valve disc (4) and the disc guide (5), 5.
placing the valve disc on the bench with the lapped
surface up. Finger-tip pressure should be sufcient to
remove these parts.

Thermal System Failure:

Thermal system failure is usually indicated by failure of the
regulator to respond to temperature changes, and when
all other trouble shooting steps have failed to correct the
problem. The adjusting spring will hold a direct acting valve
OPEN or reverse acting valve CLOSED.

The thermal system can be tested by placing the sensing
bulb in a container which can be quickly heated with steam

NOTE: It is imperative that the disc pin is not rotated

in disassembly, cleaning, or reassembly, since this af­fects the stroke adjustment of the valve.

IMPROPER HANDLING OF THE SEATS WILL RESULT
IN LEAKAGE OR IMPROPER CONTROL

Clean all parts of the body and cap with a good qual-6.
ity solvent. The valve disc and the valve plate may

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