3170 Wasson Road • Cincinnati, OH 45209 USA
Phone 513-533-5600 • Fax 513-871-0105
E-Mail: [email protected] • www.jordanvalve.com
I&M 709
Installation & Maintenance Instructions for
Mark 709 7M & 14M Actuator and Motor Valve
Warning: Jordan LowFlow 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
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 Schematic
Preferred Installation
1. To control very low flow rates, Mark 709 control valves
are often provided with trims having very small
clearances. To keep this trim functioning properly, it is
essential that the fluid flowing through the valve be clean.
2. 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 installation process begins.
3. 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.
4. A line strainer should be installed on the inlet side of
the valve to protect it from grit, scale, and other foreign
matter. A 0.033 perforated screen is usually suitable for
this purpose. Line strainers are available from Jordan
Valve.
5. For best control, 3’-0” straight sections of pipe should
be installed on either side of the valve.
6. In preparing threaded pipe connections, care should be
exercised to prevent pipe-sealing compound from
getting into pipelines. Pipe sealing compound should
be used sparingly, leaving the two end threads clean.
Jordan uses, and recommends, thread sealer Teflon
ribbon.
7. The flow arrow on the valve body must be pointed in
the direction of the 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.
8. If possible, install a relief valve downstream from the
valve. Set at 15 PSI above the control point of the valve.
9. In hot vapor lines, upstream and downstream piping
near the valve should be insulated to minimize
condensation.
10. Evaluate inlet and outlet pipe friction losses and velocities
to decide when smaller outlet piping might cause,
excessive back pressure. When required, a standard
tapered expander connected to the outlet of the valve
is recommended.
11.Where surges are severe, a piping accumulator is
recommended.
12.On steam control applications, install a steam trap with
sufficient 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.
Start-Up Procedure
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1. Be sure that the action of the control valve and of the
controller are such that you achieve the desired results.
The action can be changed if needed using the
instructions shown in “Reversing Action”.
Electrical Connection
or Pneumatic Control Signal
Reservoir
Pump
1
4
R
6
4
5
1
2
2
1
1
1
4
3
1 Shut-off Valve
2 Pipe Union
3 Strainer & Drain Valve
4 Pressure Gauge
5 MK709
6 Relief Valve
