Jordan Valve Mark 66 Series – Air Loaded Pressure Regulator User Manual

Ideal installation, I & m mark 66 series, Control line

3170 Wasson Road • Cincinnati, OH 45209 USA

Phone 513-533-5600 • Fax 513-871-0105

I & M Mark 66 Series

Installation & Maintenance Instructions for

Mark 66 Air-Loaded Pressure Regulators

Warning: Jordan Valve pressure 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 disas-
sembling 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 pipe lines and piping
components should be blown out and thoroughly
cleaned before the valve is installed.

2. Shutoff valves, pressure gauges, and bypass piping

should be installed as indicated in the diagram to
provide easier adjustment, operation, and testing.

3. A line strainer should be installed on the inlet side of

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.

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 com-
pound should be used sparingly, leaving the two
end threads clean. Jordan uses, and recommends,
thread sealer Teflon ribbon.

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 pre-
vent 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 pip-

ing 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 out-
let 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

recommended.

11. 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
back pressure. Best control is maintained if the coil
or condenser is kept dry.

Control Line

A control line must be installed as follows:
1. Connect 3/8” O.D. tubing to the fitting under the

diaphragm.

2. Connect the other end in a straight run of pipe three

to five feet downstream from the valve.

3. DO NOT locate the control line tap in an elbow,

swage, or other changes in configuration of the
pipeline where turbulence or abnormal velocities
may occur.

4. DO NOT locate the control line tap in a vessel, such

as a deaerator, located immediately downstream of
the regulator. Locate the tap in the pipeline leading
to the vessel.

5. The control line should be sloped away from the

valve.

Condensate Return Line

Main Steam Line

Pilot Air

Control Line

1 Shut off Valve

2 Jordan Regulator

3 Strainer and Drain Valve

4 Pressure Gauge

5 Relief Valve

6 Steam Trap
7 Panel Loading Station