Jordan Valve Mark 52 User Manual

I & M Mark 52

3170 Wasson Road • Cincinnati, OH 45209 USA

Phone [phone] • Fax [phone]

[e-mail] • www.jordanvalve.com

Installation & Maintenance Instructions for

Mark 52 Piloted Back 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 qualied service person; continued operation may cause system failure
or a general hazard. Before servicing any valve, disconnect, shut off, or bypass all pressurized uid. Before disas­sembling a valve, be sure to release all spring tension.

Please read these instructions carefully!

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

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.

In preparing threaded pipe connections, care 3.
should be exercised to prevent pipe sealing com­pound from getting into the pipe lines. Pipe sealing
compound should be used sparingly, leaving the
two lead threads clean. Jordan uses, and recom­mends, Seyco #2415 thread sealer Teon ribbon.
A line strainer should be installed on the inlet side 4.

This pilot operated regulator was designed to handle
your more critical inlet pressure or relief applications.
It will accurately control pressure to 100% of its rated
ow capacity with only the slightest deviation from the
set point. This is comparable to controller operated
accuracy, and on most critical applications should be
considered before costly, more rened instruments. It is
designed to handle a wide range of control pressures.

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.
Install the regulator in the highest horizontal line of 5.
piping to provide drainage for inlet and outlet pip­ing, to prevent water hammer and to obtain faster
regulation.
The ow arrow on the regulator body must be 6.

Ideal Installation

pointed in the direction of ow. The regulator may
be installed vertically or horizontally without affect­ing its operation.
For best control, 3’ 0” straight sections of pipe 7.

Main Line

should be installed on either side of the regulator.
To minimize condensation in hot vapor lines, up-8.

3

4

1

5

1

stream and downstream piping near the regulator
should be insulated.
If possible, install a relief valve upstream from the 9.
regulator. Seat at 15 psi above the control point of

2 2

1

the regulator.
Expand the outlet piping at least one pipe size if 10.

1

6

Condensate Return

1. Shut off Valve

2. Pipe Union

3. Strainer and Drain Valve

4. Pressure Gauge

5. Jordan Mark 52

6. Steam Trap

the downstream pressure is 25 percent of the in­let pressure or less. A standard tapered expander
connected to the outlet of the regulator is recom­mended.
Where surges are severe, a piping accumulator is 11.
recommended.

Operation

To protect the regulator from grit, scale, thread 1.
chips and other foreign matter, all pipe lines and
piping components should be blown out and thor­oughly cleaned before the regulator is installed.
Shut-off valves, pressure gauges and by-pass piping 2.

The main valve and the pilot are normally closed. The
inlet pressure passes through the inlet pilot tubing be­neath the pilot diaphragm. As the force of the adjusting
spring is overcome, the pilot valve opens allowing the
inlet pressure to enter the chamber above the main dia­phragm, opening the main valve. When the set point is

reached, the adjusting spring overcomes the force of the
pressure beneath the pilot diaphragm and the pilot and
main valves close.

Start-Up Procedure

With the inlet and outlet shut-off valves closed:

Throttle the bypass valve so that the pressure to be 1.
controlled is maintained near the set point.
Slowly open the inlet shut-off valve. 2.
Open the outlet shut-off valve.3.
Slowly close the bypass valve, but do not close it 4.
fully until you are certain that the regulator has con­trol of the system.
To change the controlled pressure, turn the adjust-5.
ing screw clockwise to increase pressure, counter­clockwise to decrease pressure.
Body and cap bolts should be retightened per 6.
torque procedures after valve reaches operating
temperature.

Maintenance

CAUTION: Be sure that there is not pressure in the
valve before loosening any ttings or joints. The fol­lowing steps are recommended:

Close the inlet shut-off valve. 1.
Release the compression of the adjusting spring by 2.
turning the handwheel counter-clockwise until free.
(This allows the pilot valve to open and release the
pressure on the inlet of the valve.)
Allow pressure to bleed off downstream from the 3.
regulator.
Close the outlet shut-off valve.4.

Valve Seats

The seats of Jordan regulators are lapped to light
band atness. Maintaining such tolerances is of par­amount importance for your assurance of excellent
control and dead end shut-off. DO NOT use metallic
objects in removing the seats. Care in handling is
imperative.

A. DISASSEMBLY

Close the shut-off valve on each side of the regula-1.
tor.
Remove the regulator from the line. 2.
Note the scribe marking >< on the side of the 3.
valve body (15) and cap (7). Secure the outlet body
hex in a vise. Remove the cap screws (11) and lift
the cap straight up. Please note that there is an
index pin secured in the cap (7). This index pin is
on the same side as the scribe marking >< on the
valve cap and body and it positions the valve plate

in the body.
Before removing check the valve disc (8) for a 4.
stamped arrow. This arrow points to the scribe
marking >< and the index pin hole in the valve
plate. Since the disc can be rotated 180º in some
sizes without affecting the stroke adjustment, there
may be no arrow on the valve disc. Remove the
valve disc and place on bench with the lapped sur­face up.
Lightly tapping on the valve body is usually suf-5.
cient to loosen a stuck plate (10) or disc guide
guide (9). Invert the body so that the seat set will
drop into your hand.

IMPROPER HANDLING OF THE SEATS WILL RESULT
IN LEAKAGE OR IMPROPER CONTROL.

Clean out all parts of the body and cap with sol-6.
vent. The valve disc and plate may then be cleaned.
Place a piece of 4/0 polishing paper or jeweler’s
cloth on a smooth, at surface such as a surface
plate and polish the lapped surfaces with a “gure
eight” motion. If parts are scarred, do not attempt
to re-lap them, but return them to the factory for
repair or replacement. If seats are not scarred
deeply they can be renished several times at mini­mum cost.
The vertical milled portions of the valve cap serve 7.
as a guide for the disc while stroking. A 0.0005
feeler gauge should be used to check the clear­ance between the valve disc and disc guides. To
do so, place the valve disc in the cap disc guides
with the lapped surface facing upwards and check
this clearance. If the clearance is less than 0.005”,
clean the disc guide with a smooth le.

B. REASSEMBLY

Replace the valve plate. In replacing, make certain 1.
that the index pin hole is on the same side as the
scribe marking >< on the valve body. Align the disc
pin so that it is centered in the body bore and pro­trudes upward through the slot in the plate.
In replacing the vale disc, the stamped arrow 2.
should be pointing to the scribe line on the valve
body. Place the valve disc on the valve plate, en­gaging the disc pin.
Turn the adjusting screw (28) counter clockwise to 3.
release spring compression, thus opening the pilot
valve.
To check the stroke adjustment, blow air into the 4.
inlet connection. The main valve will stroke to the
open position, and the orices should be open and
in perfect alignment. If they are not, an adjustment
is required.
To obtain the proper adjustment, remove the valve 5.
plate and disc from the valve body and loosen
the stem locknut (18). Adjustment is obtained by

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