Jordan Valve Mark 80 User Manual

I & M MK 801/802 Series

3170 Wasson Road • Cincinnati, OH 45209 USA

Phone [phone] • Fax [phone]

[e-mail] • www.jordanvalve.com

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!

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.

Ideal Installation

3

Main Steam

Line

4

1

1

1

Condensate
Return Line

Steam
Trap

5

2

By-Pass Line

1 Shut-off Valve
2 Pipe Union
3 Strainer & Drain Valve
4 Pressure Gauge
5 Jordan Valve Regulator
6 Relief Valve
7 Thermal Bulb

Control Air

1

2

7

4

6

R

Preferred Installation

Installation & Maintenance Instructions for

Mark 801/802 Temperature Regulators

ting 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 Teon ribbon.
A line strainer should be installed on the inlet side of 4.
the 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
regulation.
The ow arrow on the regulator body must be 6.
pointed in the direction of ow. The regulator may be
installed vertically or horizontally without affecting its
operation.
For best control, 3’-0” straight sections of pipe 7.
should be installed on either side of the valve.
To minimize condensation in hot vapor lines, up-8.
stream and downstream piping near the regulator
should be insulated.
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 suf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.

To protect the temperature regulator from grit, scale, 1.
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 Ideal Installa­tion Schematic to provide easier adjustment, opera-

tion, and testing.
In preparing threaded pipe connections, care should 3.
be taken to prevent pipe sealing compound from get-

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.

Correct Installation: for effective temperature control, 1.
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 4-1/2”
radius 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 re­quired 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 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 Mounting7. – 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 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.

Troubleshooting

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 valve may be jammed open.•
Foreign matter may be lodged in valve seats.•

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.

Undercooling or Overcooling

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

Thermal System Failure

Thermal system failure is usually indicated by failure •
of the regulator to respond to temperature changes,
and when all other troubleshooting 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 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 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 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 ad-6.
justing wheel downward to decrease and upward to
increase the temperature setting.

Valve Seats

A. Disassembly

The valve seats in all Jordan temperature 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. Improper handling will result
in leakage or improper control upon installation.

Close shut-off valve on each side of the regulator.1.
Remove the control valve from the line.2.
With the valve in the horizontal position, secure the 3.
body hex in a vise with the valve cap (1) on top.
Remove the cap bolts (2) and lift the cap (1) straight 4.
up.
Remove the pressure ring (8). Remove the disc and 5.
plate assembly (4, 3) from the valve body. Invert the