Jordan Valve Mark 70 User Manual

I & M Mk 701/702/707/711 Series

3170 Wasson Road • Cincinnati, OH 45209 USA

Phone [phone] • Fax [phone]

[e-mail] • www.jordanvalve.com

Warning: Jordan Valve control valves 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!

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 Line

Control Air

3

4

1

Condensate Return Line

7

1

1

6

7

2

1 Shut-off Valve
2 Jordan Control Valve
3 Strainer & Drain Valve
4 Pressure Gauge
5 Relief Valve
6 Steam Trap
7 Pipe Union

1

4

5
R

Preferred Installation

Installation & Maintenance Instructions for

Mark 701/702/707/711 Control Valves

foreign matter. A 0.033 perforated screen is usually
suitable. Line strainers are available from Jordan Valve.
For best control, 3’0” straight sections of pipe should 4.
be installed on either side of the valve.
In preparing threaded pipe connections, care should 5.
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 Teon ribbon.
The ow arrow on the valve body must be pointed 6.
in the direction of ow. 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.
If possible, install a relief valve downstream from the 7.
valve. Set at 15 psi above the control point of the
valve.
In hot vapor lines, upstream and downstream pip-8.
ing near the valve should be insulated to minimize
condensation.
In gas service, if the control pressure (downstream) 9.
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.
Where surges are severe, a piping accumulator is 10.
recommended.
On steam control applications, install a steam trap 11.
with sufcient 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.

To protect the valve from grit, scale, thread chips, 1.
and other foreign matter, all pipe lines and piping
components should be blown out and thoroughly
cleaned before the valve is installed.
Shutoff valves, pressure gauges, and bypass piping 2.
should be installed as indicated in the Ideal Installa­tion Schematic to provide easier adjustment, opera-

tion, and testing.
A line strainer should be installed on the inlet side of 3.
the regulator to protect it from grit, scale and other

Start-Up

Be sure that the action of the control valve and of 1.
the controller are such as to give the desired results.

If an increase in

pressure or temperature

must:
close valve air-to-close (direct) direct
close valve air-to-open (reverse) reverse
open valve air-to-close (direct) reverse
open valve air-to-open (reverse) direct

And the action of

the valve is:

Then the action of the

controller must be:

The control valve has been pre-set by Jordan Valve. 2.
However, ner adjustments may be required to
compensate for pressure drop conditions of the ap­plication.
With the inlet, outlet, and bypass shutoff valves 3.
closed, and no pressure in the downstream line, fully
open the outlet shut off valve. Increase ow gradu­ally by slowly opening the inlet shutoff valve. Do
not fully open the inlet valve until you are sure that
the controller and control valve have control of the
system. Usually, the handwheel on the inlet valve will
turn freely when this point is reached.
To shut off the line uid, close the inlet shut-off valve 4.
rst, then the outlet shut-off valves.
Body and cap bolts should be retightened per 5.
torque procedures after valve reaches operating
temperature.

Valve Maintenance

Caution: Make certain that there is no pressure in the
valve before loosening any ttings or joints. The fol­lowing steps are recommended.

side as the “<” on the body and cap.
Now, remove the disc (6) and disc guide (4), placing 4.
the disc on the bench with the lapped surface up.
Fingertip pressure should be sufcient to remove
these parts.

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

Clean all parts of the body and cap with a good 5.
quality solvent. The disc and plate can then be
cleaned. Place a 4/0 polish cloth or jeweler’s cloth
on a smooth, at surface and polish the lapped
surfaces. If the parts are badly scarred, do not at­tempt to relap them, but return them to the factory
for repair or replacement. If the parts are not scarred
too deeply, they can be repaired at minimal cost.
A 0.005 feeler gauge should be used to check the 6.
clearance between the disc and the disc guides.
If the clearance is less than 0.005”, clean the disc
guides with a smooth le.

For Reassembly

Close inlet shutoff valve.1.
Allow pressure to bleed off through downstream 2.
piping. Do not attempt to reverse the valve by bleed­ing pressure from the upstream side of the valve.
When the pressure gauges indicate that all pressure 3.
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.

Valve Seats

Follow instructions under Maintenance section to 1.
remove valve from line.
Disassemble the valve only as far as necessary to do 2.
the required work. See Valve Disassembly section.
When replacing seats it is recommended by Jordan 3.
Valve that the packing be replaced if the valve is
older than one year. Follow the instructions under
Packing.

Valve Disassembly/Reassembly

1/2” to 1-1/4” Sizes

To remove the control valve from the line, follow the 1.
instructions under MAINTENANCE.
Secure the body hex in the vise. Remove the cap 2.
screws (3) and lift the cap (2) straight up.
Next, remove the plate (5) and place it on the bench 3.
with the lapped surface up. You will notice that there
is also a locating pin that aligns the plate with the
disc guide. This locating pin should be on the same

Place the disc guide (4) in the body bore with the lo-7.
cating pin on the same side as the “<” on the body.
Place the disc (6) in the aperture of the disc guided 8.
(4) with the arrow pointing to the index pin hole and
engage the disc pin (8).
In placing the plate (5) in the body (1), notice that 9.
the index pin hole in the lapped surface of the plate
engages the index pin of the disc guide (4).
Replace the cap (2).10.
Tighten the cap screws (3) uniformly, being cautious 11.
not to apply too much torque. See Torque Require­ments.

1-1/2” & 2” Sizes

To remove the control valve from the line, follow 1.
instructions under MAINTENANCE.
Secure the body hex in a vise. Remove the cap bolts 2.
(3) and lift the cap (2) straight up.
Remove the pressure ring (4A). Remove the disc 3.
(6) and plate (5) assembly by lifting the assembly
straight up from the body. Place the assembly on the
bench with the disc up.

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

Clean the body and cap bores with a good quality 4.
solvent.
To clean the disc and plate, remove the guide 5.
screws. Place a 4/0 polish cloth or jeweler’s cloth on
a smooth, at surface and polish the lapped surfac­es. If the parts are badly scarred, do not attempt to

relap them, but return them to the factory for repair
or replacement. If the parts are not scarred too
deeply, they can be repaired at minimal cost.

For Reassembly:

Place the disc (6) on the plate (5) and replace the 6.
guide screws (7). Tighten the guide screws but do
not allow the screws to bind the disc against the
plate.
Replace the disc and plate assembly and the pres-7.
sure ring. Make sure that the disc pin engages the
disc and that the plate seats solidly against the plate
seat in the body.
Replace the cap and cap bolts, and tighten uni-8.
formly, being careful not to torque excessively. See
Torque Requirements.

2-1/2” & 6” Sizes

To remove the control valve from the line, follow 1.
instructions under MAINTENANCE.
Remove body cap bolts (3) and pull the cap (2) from 2.
the body (1). Notice that the cap has an internal
vertical web on which the disc spring (7A) is located.
Check the condition of the disc trap.
Remove the disc (6) and place it on the bench with 3.
the lapped surface facing up.
Remove the plate (5) and place it on the bench with 4.
the lapped surface up. Finger pressure should be
sufcient to remove the plate. If not, strike gently
from the rear, using a blunt, nonmetallic object. No­tice that the plate is positioned in the body by two
index pins (7B). These pins are secured in the body
and extend through the plate gasket (40) and into
the holes in the plate. These pins prevent the plate
from rotating in the body.

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

Clean all of the parts of the body and cap with sol-5.
vent. The disc and plate then may be cleaned. Place
a piece of 4/0 polishing cloth or jewelers cloth on
a smooth, at surface such as a surface plate, and
polish the lapped surfaces of the disc, plate and
disc guide using a “gure 8” motion. If the parts are
scarred, do not attempt to relap them, but return
them to Jordan Valve for repair or replacement. If the
seats are not scarred deeply, they can be repaired at
a nominal cost.
Reassemble in reverse order.6.
Install the cap screws and tighten uniformly. See 7.
Torque Requirements.

Stem, Disc Pin & Packing Replacement

Remove disc (6) and plate (5) following the proce-1.
dure outlined under Valve Seats.
Loosen stem connector nut (20) and bolt (19) and 2.
remove connector (18).
Back out the four allen head yoke screws (23) (1/2” 3.

- 2” sizes) or four yoke bolts (42) (2-1/2” - 6” sizes)
which will allow the body to be separated from the
yoke.
Remove the packing ange nuts (17) and the pack-4.
ing ange (15).
Loosen the stem locknut (9) and rotate the disc pin 5.
(8) counter-clockwise, pulling the valve stem (10)
upward while doing so.
When pulling the stem completely out of the body, 6.
you will remove most of the packing assembly (11)
also. The remaining parts of the packing assembly
can be “shed” out with a small screw driver.
Clean the packing bore in the body with solvent and 7.
blow dry.
The disc pin may be removed through the body 8.
bore.
Clean the stem and disc pin with solvent if they are 9.
to be reused.
Reassemble the disc pin (8), stem (10) and lock nut 10.
(9) in the valve body as they originally were.
Replace the packing spring (12) and packing retainer 11.
(13) in the packing bore.
Reassemble the new packing (11) on the stem with 12.
the open part of the “V” downward (^). There will be
a at on the top and bottom. Place the packing fol­lower (14) on top of the packing.
Gently push the packing into the packing bore and 13.
place the packing ange (15) on the stem and over
the packing studs (16).
Put on the ange nuts (17) and tighten them partially. 14.
At this point it is recommended that you gently move
the stem up and down three or four times to align
the assembly. Tighten the ange nuts until the pack­ing follower bottoms out on the top of the body.
Replace actuator in reverse order. Reassemble the 15.
valve by inserting seats as outlined in Valve Assem­bly Section for the size valve you are working with.
Then follow the instructions for Seat Alignment.

Actuator / Diaphragm

Caution: do not apply more than 50 psi to actuator

The valve need not be removed from the line, but before
performing any maintenance on the actuator, shut off
the control air supply and remove the line from the
actuator.

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