Jordan Valve Mark 75 Series – Wafer Style Control Valve - Manual

3170 Wasson Road • Cincinnati, OH 45209 USA
Phone 513-533-5600 • Fax 513-871-0105
[email protected] • www.jordanvalve.com
I & M Mark 75 (1” – 2”)
Installation & Maintenance Instructions for
Mark 75 Wafer Control Valve
Warning: Jordan Valve Control Valves must only be used, installed and repaired in accordance with these Installa-
tion & 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.
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.
Ideal 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 installation process begins.
2. Shutoff valves, pressure gauges and by-pass pip-
ing should be installed as indicated in the diagram
above 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 0.033 perforated screen is usually
suitable for this purpose. Line strainers are avail-
able from Jordan Valve.
4. For best control, 3’ 0” straight sections of pipe
should be installed on either side of the valve.
5. The disc in the valve body must be positioned
in the upstream portion of the flow, and the set-
screws should be on the downstream side of the
valve. Ideally for steam applications, the valve
should be installed in the highest horizontal line of
piping to provide drainage for inlet and outlet pip-
ing, to prevent water hammer, and to obtain faster
response.
6. If possible, install a relief valve downstream from
the valve. Set at 15 psi above the control point of
the valve.
7. In hot vapor lines, upstream and downstream pip-
ing near the valve should be insulated to minimize
condensation.
8. In gas service, expand the outlet piping at least
one pipe size, if the control pressure (downstream)
is 25 percent of the inlet pressure or less. A stan-
dard tapered expander connected to the outlet of
the valve is recommended.
9. Where surges are severe, a piping accumulator is
recommended.
10. On steam control applications, install a steam trap
with sufficient capacity to drain the coil or condens-
er. 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.
11. Tighten pipe flange bolts just enough to effect a
good seal.
Start-Up Procedure
1. Be sure that the action of the control valve and of
the controller are such that you achieve the desired
results.
Increase in
pressure or
temperature must:
And the action of
the valve is:
Then the action
of the controller
must be:
Close Valve Air to Close (Direct) Direct
Close Valve Air to Open (Reverse) Reverse
Close Valve Air to Close (Direct) Reverse
Close Valve Air to Open (Reverse) Direct
Main Line
Condensate Return Line
1. Shut off Valve
2. Jordan Control Valve
3. Strainer and Drain Valve
4. Pressure Gauge
5. Relief Valve
6. Steam Trap
7. Pipe Union
1
6
3
1
1
2
1
5
4
Control Air
7 7
4
R
PROTECT VALVES WITH LINE STRAINERS