Jordan Valve Mark 85 User Manual
I & M Mark 85
3170 Wasson Road • Cincinnati, OH 45209 USA
Phone 513-533-5600 • Fax 513-871-0105
info@richardsind.com • www.jordanvalve.com
Installation & Maintenance Instructions for
Mark 85 Fail-Safe Temperature Regulator
Warning: Jordan Valve Regulators and Control Valves 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 qualied 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!
of the temperature regulator to protect it from grit,
scale and other foreign matter. A 0.033 perforated
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 from the factory.
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 6.
pointed in the direction of ow. The regulator may
Ideal Installation
be installed vertically or horizontally without affecting its operation.
5
3
4
1
2
1
2
4
1
7
6
R
For best control, 3’ 0” straight sections of pipe 7.
should be installed on either side of the regulator.
In hot vapor lines, upstream and downstream pip-8.
ing near the regulator should be insulated to minimize condensation.
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.
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
On steam control applications, install a steam trap 10.
of sufcient 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.
To protect the temperature regulator from grit, 1.
scale, 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.
Shut-off valves, pressure gauges, and by-pass pip-2.
ing should be installed as indicated in the diagram
to provide easier adjustment, operation, and testing.
In preparing threaded pipe connections, care 3.
should be exercised to prevent pipe sealing compound from getting into the pipe lines. Pipe sealing
compound should be used sparingly, leaving the
two lead threads clean. Jordan uses, and recommends, Seyco; 2415 thread sealer Teon ribbon.
A line strainer should be installed on the inlet side 4.
PROTECT VALVES WITH LINE STRAINERS
Bulb Installation
The Thermal System is a 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.
CORRECT INSTALLATION - For effective tempera-1.
ture 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 2.
are not crushed, kinked, or twisted. A bend with a
radius of 4-1/2 pipe diameters or larger is recommended.
HORIZONTAL MOUNTING - When the bulb is to be 3.
mounted horizontally, it must be turned so that he
word TOP and a center punch mark (stamped on
the adaptor) faces upward.
VERTICAL MOUNTING - No special precaution is 4.
required when the bulb is mounted vertically.
INVERTED MOUNTING - A special capillary is re-5.
quired 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 - For accurate control, the entire length 6.
of the bulb should be inserted. Avoid locating a
bulb in the direct path of steam or water. Never lay
the bulb on the bottom of a tank. Approximately
8D is sufcient distance from the source of heat or
coolant to the sensing bulb.
PIPELINE MOUNTING - When installing the sensing 7.
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 - Finned bulbs should be installed 8.
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.
Troubleshooting
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 may need reconditioning.
Safety relief valve may be jammed open.
Foreign matter may be lodged in valve seats.
Valve stroke may be out of adjustment.
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 that coolant is circulating properly and that
all steps have been taken as indicated for underheating or overheating in items 2 and 3 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 CLOSED or reverse acting valve OPEN.
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 steam while alternately heating
and cooling the bulb. If the steam 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 2.
cooling action.
Fully open the inlet shut-off valve. Then, slowly 3.
open the outlet shut-off valve.
Close the by-pass valves when the approximate 4.
temperature is reached.
Allow approximately 30 minutes to reach stable 5.
operation 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 increase and upward to
decrease the temperature setting.
Body and cap bolts should be retightened per 7.
torque procedures after valve reaches operating
temperature.
If You Experience Underheating:
Be sure that shut-off valves are fully open.
Be sure that inlet pressure is adequate.
Clean line strainer screens.
Clean steam traps and be sure that they are work-
ing 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-
Valve Seats
A. DISASSEMBLY
The valve seats in all Jordan regulators are lapped
to light band atness. Maintaining such tolerances
is of paramount importance for your assurance of
excellent control and tight shut-off. Do not use
metallic objects in removing the seats. Care in
handling is imperative.
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