Jordan Valve Mark 82 User Manual

I & M Mark 82

3170 Wasson Road • Cincinnati, OH 45209 USA

Phone [phone] • Fax [phone]

[e-mail] • www.jordanvalve.com

Installation & Maintenance Instructions for

Mark 82 Temperature Regulators

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 qualifi ed service person; continued operation may cause system failure or a
general hazard. Before servicing any valve, disconnect, shut off, or bypass all pressurized fl uid. Before disassembling a
valve, be sure to release all spring tension.

Please read these instructions carefully!

regulator.

The fl ow arrow on the regulator body must be point-6.
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.

ed in the direction of the fl ow. The regulator may be

installed vertically or horizontally without affecting its

operation.

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

be installed on either side of the regulator.

Upstream and downstream piping near the regulator 8.

should be insulated to minimize condensation in hot

vapor lines.

For injection heating applications, the regulator 9.

should be installed above the maximum water level

in the tank, or a check valve should be installed to

prevent water from backing up into the regulator.

For best regulation, the temperature regulator 10.

should be installed as closely as possible to the unit

in which the temperature is being controlled.

On steam control applications, install a steam trap 11 .

of suffi cient capacity to drain the coil or condenser.

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

pressure. Best control is obtained when the coil or

condenser is kept dry.

Main Steam Line

3

Installation

4

1

1

Steam

1

Trap

Condensate

Return Line

5

2 2

By-Pass Line

1. Shut-Off Valve

2. Pipe Union

3. Strainer & Drain Valve

4. Pressure Gauge

5. Jordan Regulator

6. Relief Valve

7. Thermal Bulb

4

1

7

6

R

Bulb Installation

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 temperature regula­tor is installed.
Shutoff valves, pressure gauges, and bypass piping 2.
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, leaving the two lead
threads clean.
A line strainer should be installed on the inlet side 4.
of the temperature regulator to protect it from grit,
scale and other foreign matter. A 0.033 perforated
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

The Thermal System is a hermetically sealed unit

consisting of a sensing bulb, capillary tubing, pro-

tective 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 fi eld and must be returned

to the factory for repairs.

Correct Installation – For effective temperature con-1.

trol, correct installation of the sensing bulb is essen-

tial. 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” ra-

dius or larger is recommended.
Horizontal Mounting3. – When the bulb is to be
mounted horizontally, it must be turned so that the
word TOP (stamped on the adaptor) faces upward.
Vertical Mounting4. – No special precaution is re-
quired when the bulb is mounted vertically pointing
down.
Inverted Mounting5. – 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.
Insertion6. – For accurate control, the entire length of
the bulb should be inserted. Avoid locating a bulb
in the direct path of steam or water. Never lay a bulb
on the bottom of the tank. Approximately 8” is suf­fi cient distance from the source of heat or coolant
to the sensing bulb.
Pipeline Mounting7. – When installing a sensing bulb
in piping, be sure that the pipeline is at least twice
the diameter of the sensing bulb so that free fl ow is
obtained around the bulb.
Finned Bulbs8. – Finned bulbs should be installed at
right angles to the air movement. Good circulation
is required to sense the average temperatures.
When the bulb is installed at a point higher than the 9.
regulator itself, the range may be somewhat low­ered. Conversely, the range may be raised if the
bulb is installed below the regulator.

Trouble Shooting

If You Experience 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 my need reconditioning.
Foreign matter may be lodged in valve seats.
Valve stroke may be out of adjustment.

If You Experience Underheating:

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

If You Experience Overheating:

Overheating is often caused by foreign matter hold-
ing the valve seats in the open position. Inspect and
clean seats or replace them.
Check stroke adjustment.
Check for damage or failure of the thermal system.

If You Experience Undercooling or Overcooling:

Be sure the coolant is circulating properly and that 
all steps have been taken as indicated for under­heating or overheating in the steps above.

If You Experience 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 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 fi ll. The thermal system is
hermetically sealed and cannot be repaired in the fi 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 cool-2.
ing 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 4.
temperature 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 ad-6.
justing wheel downward to decrease and upward to
increase the temperature setting.

Note: These instructions apply to both the direct acting
and the reverse acting regulators. The reverse acting reg­ulator is identical to the direct acting regulator except for
the design and operation of the pilot valve.

In the direct acting regulator, an increase of tem-7.
perature at the sensing bulb will close the pilot valve
seats which causes the main valve seats to close.
In the reverse acting regulator, an increase of tem-8.
perature at the sensing bulb will open the pilot valve
seats and main valve seats.

Therefore the reverse acting pilot valve assembly is an
inverted version of the direct acting pilot valve. However,
because of design differences, the upper bonnet of the
regulator must be replaced to change the valve action.

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