6.
The flow arrow on the valve body must be pointed in the
direction of flow. Ideally, the valve should be installed in the
highest horizontal line of piping to provide drainage for
inlet and outlet piping, to prevent water hammer, and to
obtain faster response.
7.
If possible, install a relief valve downstream from the valve.
Set at 15 psi above the control point of the valve.
8.
In hot vapor lines, upstream and downstream piping near
the valve should be insulated to minimize condensation.
9.
In gas service, if the control pressure (downstream) is 25%
of the inlet pressure or less, expand the outlet piping at
least one pipe size. A standard tapered expander connected
to the outlet of the valve is recommended.
10. Where surges are severe, a piping accumulator is recom-
mended.
11. On steam control applications, install a steam trap with suf-
ficient capacity to drain the coil or condenser. Be sure to
have a good fall to the trap, and no backpressure. Best
control is maintained if the coil or condenser is kept dry.
Trouble Shooting
Trouble Possible Cause & Cure
Erratic Control
Will Not Operate
Wiring
Please read these instructions carefully!
Your Jordan Valve product will provide you with long, trouble-
free service if it is correctly installed and maintained. Spend-
ing 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 Schematic
Preferred Installation
1.
To protect the valve from grit, scale, thread chips and other
foreign matter, ALL pipelines and piping components should
be blown out and thoroughly cleaned before the installa-
tion process begins.
2.
Shutoff valves, pressure gauges and by-pass piping should
be installed as indicated in the Ideal Installation Schematic
to provide easier adjustment, operation, and testing.
3.
A line strainer should be installed on the inlet side of the
valve to protect it from grit, scale and other foreign matter. A
.033 perforated screen is usually suitable for this purpose.
Line strainers are available from Jordan Valve.
4.
For best control, 3’-0” straight sections of pipe should be
installed on either side of the valve.
5.
In preparing threaded pipe connections, care should be
exercised to prevent pipe-sealing compound from getting
into the pipelines. Pipe-sealing compound should be used
sparingly, leaving the two end threads clean. Jordan uses,
and recommends, thread sealer Teflon ribbon
Warning: Jordan Valve 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 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 disassembling a valve, be sure to
release all spring tension.
PROTECT VALVES WITH LINE STRAINERS
3170 Wasson Road • Cincinnati, OH 45209 USA
Phone 513-533-5600 • Fax 513-871-0105
E-Mail: [email protected] • www.jordanvalve.com
I&M 39/39MX
Installation & Maintenance Instructions for
Mark 39 Electric Motor Actuated 3 Way Valve
Oversizing causes cycling and hunting
and reduces the rangeability of the valve.
Make certain that your sizing is correct.
Steam traps downstream may need
attention.
Excessive foreign matter on seats. Clean
them.
Valve stroke out of adjustment. Check and
readjust if necessary.
Valve disc may not be moving freely.
Electrical power off or loose connection.
Defective control device.
Defective motor.
See the motor manufacturer’s literature, supplied with the
valve, for wiring connections and instructions.
Caution: Disconnect electrical power supply before wiring
motor into circuit to avoid electrical shock or possible
damage to equipment. Always disconnect power supply
before attempting any wiring changes.
