Jordan Valve Mark 688 Series - Piloted Soft Seat Regulator - Manual (Page 8)

3170 Wasson Road • Cincinnati, OH 45209 USA
Phone 513-533-5600 • Fax 513-871-0105
[email protected] • www.jordanvalve.com
I & M Mark 68G Series
Installation & Maintenance Instructions for
Mark 68G Pressure Regulators (1/4” – 2”)
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 disas-
sembling 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 main-
tained. Spending a few minutes now reading these in-
structions 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
1. To protect the valve from grit, scale, thread chips,
and other foreign matter, all pipe lines and piping
components should be blown out and thoroughly
cleaned before the valve is installed.
2. Shutoff valves, pressure gauges, and bypass piping
should be installed as indicated in the Ideal Installa-
tion Schematic to provide easier adjustment, opera-
tion, and testing.
3. In preparing threaded pipe connections, care
should be exercised to prevent pipe sealing com-
pound from getting into the pipe lines. Pipe sealing
compound should be used sparingly, leaving the
two end threads clean. Jordan uses, and recom-
mends, thread sealer Teflon ribbon.
4. A line strainer should be installed on the inlet side 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.
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
vertically or horizontally without affecting its operation.
7. For best control, 3’0” straight sections of pipe should
be installed on either side of the valve.
8. In hot vapor lines, upstream and downstream piping
near the regulator should be insulated to minimize
condensation.
9. If possible, install a relief valve downstream from the
valve. Set at 15 psi above the control point of the
regulator.
10. Expand the outlet piping at least one pipe size if the
controlled pressure (downstream) is 25% of
the inlet pressure or less. A standard tapered ex-
pander connected to the outlet of the regulator is
recommended.
11. Where surges are severe, a piping accumulator is
recommended.
12. Operate the regulator within its rated pressure and
temperature.
Start-Up
1. Fully open the outlet shut-off valve.
2. Slowly open the inlet shut-off valve.
3. Slowly open and close outlet shut-off valve several
times. This fully strokes the valve to insure satisfac-
tory operation.
4. With outlet shut-off valve open, slowly screw down
adjusting screw until the desired pressure is shown
on the outlet pressure gauge.
5. To change the controlled pressure, turn the adjust-
ing screw clockwise to increase and counter-clock-
wise to decrease the pressure.
1
3
1
1
Main Steam Line
2
1
5
7
1 Shut off Valve
2 Pipe Union
3 Strainer and Drain Valve
4 Pressure Gauge
5 Jordan Regulator
6 Relief Valve
7 Steam Trap
4
2
4
6
R
Preferred Installation