Jordan Valve Mark 66 User Manual

I & M Mark 66 Series

3170 Wasson Road • Cincinnati, OH 45209 USA

Phone [phone] • Fax [phone]

[e-mail] • www.jordanvalve.com

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 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 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

Main Steam Line

3

4

1

1

1

5

Condensate Return Line

Pilot Air

4

1

2

1

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

Control Line

7

6

R

Installation & Maintenance Instructions for

Mark 66 Air-Loaded Pressure Regulators

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.

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
recommended.

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

Control Line

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.

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.

6. Install a shutoff valve (not a needle valve) in the
control line. Install a pressure gauge in the control
line or near the outlet of the valve to aid in setting
the valve and for checking for inlet pressure during
maintenance procedures. (There is a 1/4” tapped
opening in the lower bonnet).

Start Up

With the inlet, outlet, and bypass shutoff valves closed,
and no pressure in the downstream line:

1. Fully open the control line shutoff valve.

2. Fully open the outlet shutoff valve.

3. Slowly open the inlet valve just enough to start flow
through the valve. Observe the downstream pres­sure gauge. Increase the downstream pressure
slowly by gradually opening the inlet valve.

4. Do not fully open the inlet valve until you are sure
that the regulator has control of the system. Usu­ally the handwheel on the inlet valve will turn freely
when this point is reached.

5. To change the controlled pressure, adjust the load­ing pressure supplied to the top of the diaphragm.

Maintenance

Caution: Ensure that the valve is de-pressurized before
loosening any fittings or joints. The following steps are
recommended before performing any maintenance on
the valve:

1. Close the inlet shut-off valve.

2. Allow pressure to bleed off through the downstream
piping. Do not attempt to reverse the flow through
the valve by bleeding pressure from the upstream
side of the valve.

3. When the pressure gauges indicate that all pressure
has been removed from the system, close the outlet
shut-off valve. The valve may removed from the line
and serviced.

Note: Refer to the drawing at the end of this docu­ment for description and proper orientation of parts.

Valve Seats

1/2” – 1-1/2”

Disc Pin

Index Pin

Cap Screws

Hex Nuts (2)

Body

Studs (2)

Valve Plate

Valve Disc

Disc Guide

Cap

2”

Guide Screws (2)

Body Bolts

Stud Nuts (2)

2-1/2” – 6”

Body Bolts

Disc Spring

Lockwasher

Disc Guide (2)

Disc Pin

Body

Studs (2)

Plate

Disc

Pressure Ring

Cap

Disc Pin

Gasket: Plate-Body

Plate

Disc

Gasket: Cap-Plate

Cap

A. Disassembly

The sliding gate seats of Jordan Valve are lapped to
light band flatness. Maintaining such tolerances is of
paramount importance for your assurance of excellent
control and tight shutoff. Do not use metallic objects in
removing the seats. Care in handling is imperative.

1. Follow procedures under maintenance to remove
the valve from line.

2. Note the scribes “<” on the side of the valve body
and cap. Secure the body flats in a vise. Remove the
cap bolts and two nuts. Lift the cap straight up.

3. Before removing, check the disc for a stamped ar­row. This arrow points to the “<” on the body.

(Note: certain discs that can be rotated 180° without af­fecting the stroke might not have an arrow).
Remove the disc guide by lifting straight up. Also lift
straight up on the disc. Place the disc on the bench,
lapped surface facing up. Protect the lapped surfaces on
both sides of the disc guide.

It is imperative that the disc pin assembly (disc pin,
stem and locknut is not rotated when disassembling,
cleaning or reassembling, since this will affect the
stroke adjustment of the valve.

4. Invert the body and lightly tap on the exterior to
remove the plate. Let the plate drop out into your
hand, and place it on the bench with the lapped
surface facing up.

5. Clean all of the parts, body and cap with solvent.

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Body