Jordan Valve Mark 57 User Manual

I & M Mark 57

3170 Wasson Road • Cincinnati, OH 45209 USA

Phone [phone] • Fax [phone]

[e-mail] • www.jordanvalve.com

Installation & Maintenance Instructions for

Mark 57 (1/2” to 6”) 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 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.

should be exercised to prevent pipe-sealing com­pound from getting into 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 the flow. Ideally the valve should
be installed in the highest horizontal line of pip-

Ideal Installation

ing to provide drainage for inlet and outlet piping,
to prevent water hammer, and to obtain faster re-

Main Steam Line

sponse.

7. If possible, install a relief valve downstream from
the valve. Set at 15 psi above the control point of

3

4

1

2 1

5

R

the valve.

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

9. In gas service, expand the outlet piping at least
one pipe size, if the control pressure (downstream)

1

1

6

Condensate Return Line

1 Shut-off Valve
2 Jordan Regulator
3 Strainer and Drain Valve
4 Pressure Gauge
5 Relief Valve
6 Steam Trap

is 25 percent of the inlet pressure or less. 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
backpressure. Best control is maintained if the coil

1. To protect the valve from grit, scale, thread chips

or condenser is kept dry.

and other foreign matter, ALL pipelines and piping
components should be blown out and thoroughly

Start-Up

cleaned before the installation process begins.

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. 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
available from Jordan Valve.

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

1. Fully open the outlet shutoff valve.

2. Slowly open the inlet shutoff valve.

3. Slowly open and close the outlet shutoff valve sev­eral times. This fully strokes the valve to insure sat­isfactory operation.

4. With the outlet shutoff valve open, slowly screw
down the adjusting screw until the desired pres­sure is shown on the outlet pressure gauge.

5. To change the controlled pressure, turn the ad­justing screw clockwise to increase the pressure,
counterclockwise to decrease pressure.

5. In preparing threaded pipe connections, care

Trouble Shooting

The first step in trouble-shooting a piloted back pressure
regulator is to classify the action of the controlled pres­sure into one of the following categories:

A. Over Pressure - Controlled pressure too high; not

enough flow or no flow through valve.

B. Under Pressure - Valve will not close or controlled

pressure decreases after valve closes.

C. Pressure Fluctuates - Controlled pressure rises and

falls, will not settle out under low relief loads.

The next step is to determine what could cause the trou­ble. The third step is to locate and remedy the cause by
the process of elimination. Make no assumptions and
check the easy ones first. The guide below lists the con­trolled pressure action, common causes and procedure
for checking each cause.

following steps are recommended:

1. Close the inlet shutoff 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 shutoff valve, and the valve may be serviced.

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

Pilot Valve

The pilot valve is a Jordan Mark 50 Back Pressure Regu­lator. For maintenance, refer to the Mark 50 Installation
& Maintenance sheet.

Main Valve

Controlled Pressure Action OVER PRESSURE

 Valve undersized for application. Check capacity

required and valve capacity.

 Line strainer screen clogged. Blow down strainer or

visually check that it is clear.

 Incorrect setting on range spring. Vary the setting

and check response.

 Main valve diaphragm ruptured. See section on

Main Valve Maintenance.

Controlled Pressure Action UNDER PRESSURE

 Incorrect setting on range spring. Vary the setting

and check response.

 Pilot Valve or main valve seats leaking. Close inlet

shut-off valve. Close outlet shut-off valve and re­move loading pressure tubing. Both pilot valve and
main valve are closed. Barely open inlet shut-off
valve until fluid issues from pilot valve port, then
close inlet valve. Flow from pilot valve port should
cease. If it does not, the pilot seats are leaking. If
fluid issues from main valve port, the main valve
seats are leaking.

 By-pass shut-off valve leaking. During period of

leakage, close inlet shut-off valve, observe pressure
gauge.

 Bleed port in main valve clogged. Remove Upper

Bonnet to gain access bleed port and clean bleed
port. Follow instructions in section TO REMOVE
MAIN VALVE DIAPHRAGM.

It is necessary to remove the main valve from the line
only if the main valve seats must be replaced, inspected
or adjusted. All other operations can be performed with
the valve in the line and without disturbing the stroke
adjustment.

To Repair Main Valve

The sliding Gate Seats of Jordan Valves 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.

To Remove Main Valve Seats

1. Remove the pilot tubing and the pilot valve with the
mounting nipple.

2. With the main valve out of the line, remove the
bolts securing the main valve cap to the main valve
body and lift the cap straight up.

3. Lift the disc from the plate and place on a clean
surface with the seating side up.

4. Place the valve body on a side. Hold one hand over
the plate to receive it and tap lightly on the back
of the plate with a soft, blunt object; push the pate
out evenly. Place the plate on a clean surface seat­ing side up.

Controlled PRESSURE FLUCTUATES

 Valve oversized. Check capacity required and valve

capacity.

Maintenance

Caution: Make certain that there in no pressure in
the valve before loosening any fittings or joints. The

To Remove Main Valve Diaphragm

and Disc Pin

1. Remove the bottom cap. The spring and spring
guide will come out with it.

2. Disconnect the loading pressure tubing from the
upper case, remove the case bolts and upper case.

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