Jordan Valve Mark 67 User Manual
I & M Mark 67 (1/2” – 6”)
3170 Wasson Road • Cincinnati, OH 45209 USA
Phone 513-533-5600 • Fax 513-871-0105
info@richardsind.com • 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 2
1
1
6
Condensate Return Line
4
1
1. Shut off Valve
2. Jordan Regulator
3. Strainer and Drain Valve
4. Pressure Gauge
5. Relief Valve
6. Steam Trap
5
Installation & Maintenance Instructions for
Mark 67 Pressure Regulators
pound 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 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, expand the outlet piping at least
one pipe size if the control pressure (downstream)
is 25% 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
or condenser is kept dry.
Control Line
1. To protect the valve from grit, scale, thread chips
and other foreign matter, ALL pipelines and piping
components should be blown out and thoroughly
cleaned before the installation process begins.
2. Shutoff valves, pressure gauges and by-pass 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 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.
5. In preparing threaded pipe connections, care
should be exercised to prevent pipe-sealing com-
A control line must be installed as follows:
1. Connect one end of a 3/8” tubing to the fitting under the diaphragm.
2. Connect the other end in a straight run of pipe 3 to
5 feet downstream of 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 vessel, such
as a deaerator located immediately downstream of
the valve. 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.
7. Install a pressure gauge in the control line or near
the inlet of the valve to aid in setting the valve and
checking for inlet pressure during maintenance
procedures. (There is a 1/4” NPT 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 shut-off valve.
2. Fully open the outlet shut-off valve.
3. Slowly open the inlet shut-off valve.
4. 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.
5. 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 is achieved.
6. To change the controlled pressure, adjust the
controlled pressure supplied to the top of the diaphragm.
7. Body and cap bolts should be re-tightened per
torque procedures after valve reaches operating
temperature.
Trouble Shooting
The first step in troubleshooting a piloted pressure regulator is to classify the action of the controlled pressure
into one of the following categories:
A. Under Pressure: Controlled pressure too low; not
enough flow or no flow through valve.
B. Over Pressure: Valve will not close or controlled
pressure increases after valve closes.
C. Pressure Fluctuates: Controlled pressure rises and
falls, will not settle out under low 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.
Controlled pressure action UNDER PRESSURE:
Valve undersized for application. Check capacity
required and valve capacity.
Line strainer or pilot strainer screen clogged. Blow
down strainers or visually check that they are clear.
Incorrect setting on range spring. Vary the setting
and check response.
Main valve diaphragm ruptured. See action on main
valve maintenance.
Malfunction of other piping components. Check
for leaking traps and safety valves, inadvertently
opened or closed valves.
Controlled pressure action OVER PRESSURE:
Incorrect setting on range spring. Vary the setting
and check response.
Pilot valve or main valve seats leaking. Close inlet
shut-off valve, allow downstream pressure to bleed
off, close outlet valve and remove loading pressure
tubing. Back out adjusting screw on pilot valve until
free (both pilot and main valves are now closed.)
Crack open inlet shut-off valve - if fluid issues from
pilot valve port, the pilot seats are leaking. If the
fluid issues from the main valve port, the main valve
seats are leaking.
By-pass shut-off leaking. During period of leakage
close outlet shut-off valve, observe downstream
pressure gauge.
Bleed port in main valve clogged/partially clogged.
Remove 1/2” NPT pipe plug in upper bonnet to
gain access to bleed port and clean bleed port.
Follow instructions in section “To Remove Main
Diaphragm.”
Controlled Pressure Fluctuates:
Valve oversized. Check capacity required and valve
capacity.
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. 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.
2. When the pressure gauges indicate that all pressure has been removed from the system, close the
outlet shut-off 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
1. Remove the tubing between the pilot valve and the
main valve.
2. Remove the pilot valve by unscrewing the mounting
nipple from the main valve.
Remove Pilot Valve Diaphragm
1. Release the compression of the range spring by
turning the adjusting screw counterclockwise until
free.
2. Remove the housing screws (7), spring housing (3),
spring guide (4), range spring (5), upper diaphragm
plate (6), and diaphragm (8).
Remove Pilot Valve Seats
1. Release the bottom cap (15), the return spring (16),
plug (17), stem (11), and strainer (not shown) will
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