Jordan Valve Mark 86 Series - Ambient Temperature Regulator User Manual

I & m mark 86, Introduction, Installation

3170 Wasson Road • Cincinnati, OH 45209 USA

Phone 513-533-5600 • Fax 513-871-0105

I & M Mark 86

Installation & Maintenance Instructions for

Mark 86 Temperature Regulator

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 qualified service person; continued operation may cause system failure
or a general hazard. Before servicing any valve, disconnect, shut off, or bypass all pressurized fluid. Before disassem-
bling 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 main-
tained. Spending a few minutes now reading these in-
structions can save hours of trouble and downtime later.
When making repairs, use only genuine Jordan Valve
parts, available for immediate shipment from the factory.

Introduction

The Mark 86 AMBITEMP II Ambient Temperature Sensing
Control Valve, our AMBITEMP II, responds to temperature
changes of the air surrounding the actuator. The most
common application for the Mark 86 is the automatic
control of tracing steam or other hot fluids, to prevent
freezing of process piping. As the temperature of the
area in which the valve is installed decreases to near
the freezing point, the valve opens. As the temperature
increases to a safe level the valve will close and thereby
conserve the heat energy lost on manually controlled
constantly flowing systems.

The Mark 86 is identical to the Mark 80 Temperature
Regulator except that the Mark 86 requires no capillary
or sensing bulb. The actuator on the Mark 86 serves as
both the sensing element and the power element.

Installation

All of the Installation and Maintenance instructions for
the Mark 80 apply also to the Mark 86 except for the in-
structions which pertain specifically to the sensing bulb.

Additional instructions regarding the installation of a
Mark 86 are as follows:

Do not install the valve so that the actuator is near



a source of heat, such as another steam or hot oil
line.
Insulate the piping adjacent to the Mark 86 to pre-



vent radiant heating of the actuator.
Install the valve upright in the line on outdoor appli-



cations so that precipitation does not collect in the

underside of the actuator.
The temperature at which the valve is fully open,



as indicated on the Set Point Indicator, can be
changed by turning the adjusting wheel under the
spring. Turn the wheel to compress the spring to
increase the setting. Turn the wheel downwards to
release compression on the spring to decrease the
temperature setting. The limits of adjustment are
indicated on the nameplate under “Range”.

Field & Shop Testing Procedures

Field Testing (Valve Closed):

Observe that Stem Position Indicator points to

“CLOSED”.
Observe SET POINT on the Set Point Scale. This

indicates the temperature at which the Mark 86
will be fully open. (See Temp. Span Chart on P.2
Ambitemp II Bulletin to find temperature at which
regulator is fully closed.)
By spraying the top of the SST Diaphragm Actuator

(Thermal Head) with Freon-22, thus simulating low-
ering ambient temperature, the valve stem position
indicator will move to the “Open” position (in about
15-20 seconds) showing the valve is functioning.

ALTERNATE TEST METHOD: Tape a piece of

cardboard or sheet metal around the circum-
ference of the actuator so that it extends about
two inches above the edge. Place ice, cubes or
crushed, on the top of the actuator to cover as
much surface as possible. The valve will stroke
within five minutes and should indicate full
open on the STEM POSITION INDICATOR.

Shop Calibration and Setting (For 32°F Set Point):

Place entire SST Diaphragm actuator (Thermal

Head) in ice water. Wait approximately five minutes.
Now turn the adjusting wheel until seats are com-

pletely open.
If necessary, reposition seat point scale so that set

point indicator points to 32°F.
If a different “wide open” set point is desired, turn

the adjusting wheel until the set point indicator