Jordan Valve Mark 56 User Manual

I & M Mark 56

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

1

4

1

1

1

6

Condensate Return Line

1. Protect the regulator from grit, scale, thread chips
and other foreign matter, by blowing out and thor­oughly cleaning all pipe lines and piping compo­nents before the regulator is installed.

2. Shutoff valves, pressure gauges, and by-pass pip­ing should be installed as indicated in the diagram
above to provide easier adjustment, operation and
testing.

3. When preparing threaded pipe connections, care
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.

4. A line strainer should be installed on the inlet side
of the regulator to protect it from grit, scale, and

Plant Air

2

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

1

7

5

R

Installation & Maintenance Instructions for

Mark 56 Air Loaded Back Pressure Regulators

other foreign matter. A 0.033” perforated screen is
usually suitable. Line strainers are available from
Jordan Valve.

5. Install the regulator in the highest horizontal line of
piping to provide drainage for inlet and outlet pip­ing, to prevent water hammer, and to obtain faster
regulation.

6. The flow arrow on the regulator body must be
pointed in the direction of flow. The regulator may
be installed in any direction, but damage to the
seating surfaces may occur if installed in a vertical
line with the flow upwards.

7. For best control, 3’0” straight sections of pipe
should be installed on either side of the regulator.

8. In hot vapor lines, upstream and downstream pip­ing near the regulator should be insulated to mini­mize condensation.

9. Expand the outlet piping at least one pipe size if
the controlled pressure (downstream) is 25 percent
of the inlet pressure or less. A standard tapered
expander connected to the outlet of the regulator
is recommended.

10. Where surges are severe, a piping accumulator is
recommended.

Control Line

Install a control line 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 upstream from the regulator.

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. DO NOT locate the control line tap in
a vessel, such as a deaerator, located immediately
upstream of the regulator. Locate the tap in the
pipeline leading to the vessel.

4. The control line should be sloped away from the
regulator.

5. Install a shutoff valve (not a needle valve) in the
control line.

6. Install a pressure gauge in the control line or near
the inlet of the regulator to aid in setting the valve.

Start-Up Procedure

2”

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 regulator. Observe the upstream
pressure gauge. Increase the air-loading pressure
slowly to gradually close the regulator.

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.

Trouble Shooting

Erratic Control

• Oversizing causes cycling and hunting, and re­duces the rangeability of the regulator. Check siz­ing calculations to be sure that you have the proper
size valve.

• Steam traps downstream may need attention and
could be causing erratic control.

• Safety valve may be jammed open, disrupting the
system. Repair as necessary.

• Excessive foreign matter on seats can cause erratic
operation. Clean them as outlined under Valve
Seats.

• Valve stroke may be out of adjustment. Readjust
stroke.

• Valve disc may not be moving freely. Check disc
guide clearance, and clearance of the stem to the
bushings.

Will Not Operate

• Diaphragm may be ruptured and need replace-
ment.

Valve Seats

1/2” to 1-1/2”

Disc Pin

Index Pin

Body Bolts

Stud Nuts (2)

Body

Studs (2)

Disc Guide

Disc

Plate

Cap

Disc Pin

Guide Screws (2)

Body Bolts

Stud Nuts (2)

Pressure Ring

Disc

Plate

Cap

Body

Studs (2)

2-1/2” to 6”

Disc Pin

Body
Bolts

Disc Guide (2)

Disc Spring

Lockwashers

Body

Gasket: Plate-Body

Plate

Disc

Gasket: Cap-Plate

Cap

Disassemby (All Sizes)

The sliding gate valve seat is the key to the excellent
control and tight shutoff provided by a Jordan valve.
Maintaining these seats in good condition is critical to
valve performance, so care in handling is imperative.
NEVER USE METALLIC OBJECTS IN REMOVING THE
SEATS. Improper handling can result in leakage and poor
control.

1. Close the shutoff valve on each side of the valve,
and remove the valve from the line.

2. Note scribed “<“ on the side of the body and cap
for 1/2” - 2” sizes. Secure the body in a vise. Re­move the body bolts and stud nuts and lift the cap
straight up.

3. Before removing, note the locating pin that aligns
the plate with the disc guide on 1/2” to 1-1/2”
sizes. This pin should be on the same side as the
“<“ on the body and cap. Remove the plate and

disc (on 2” valves, the disc will be attached to the
plate, and the screws should now be removed to

separate the two parts; on 2-1/2” - 6” valves, place
the body on its side to remove the plate). Place the
disc on the bench with lapped surfaces facing up.
Protect the lapped surfaces on both sides of the
disc guide.

It is important that the disc pin is not rotated when
disassembling, cleaning, or reassembling, since this af­fects the stroke adjustment.

4. Lightly tap on the body to remove the disc guide (2”
valve uses a pressure ring instead of a disc guide).
Invert the body, let the disc guide drop out into

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