Jordan Valve Mark 688 Series - Piloted Soft Seat Regulator - Manual

3170 Wasson Road • Cincinnati, OH 45209 USA
Phone 513-533-5600 • Fax 513-871-0105
[email protected] • www.jordanvalve.com
Mark 688 Series
Installation Instructions for
Mark 688 Piloted Soft Seat Regulators
Warning: Jordan Valve Pressure Regulators must only be used, installed and repaired in accordance with these In-
stallation & 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 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 pipelines and piping
components should be blown out and thoroughly
cleaned before the installation process begins.
2. Shutoff valves, pressure gauges and by-pass pip-
ing are optional, and if installed should be in ac-
cordance with all applicable codes, standards, and
practices. They are recommended to provide easier
adjustment, operation, and testing.
3. 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.
4. If possible, install a relief valve downstream from
the valve. Set at slightly above the control point of
the valve but below the maximum safety limit for
the tank.
5. It is strongly recommended that the installer read
and be thoroughly familiar with API 2000, Standard
Information for Tank Blanketing Regulator Selection
before installing and attempting to operate this
product.
Control Line
A control line must be installed as follows:
1. Connect one end of a ¾” pipe to the fitting on top
of the main valve actuator.
2. Connect the other end to an appropriate fitting on
the tank.
3. DO NOT locate the control line tap in any location
where turbulence or abnormal velocities may occur.
4. The control line should be sloped away from the
valve.
5. Install a pressure gauge to measure pressure in the
tank itself, not in the outlet piping or the control line
to aid in setting the valve.
Control Line Piping Recommendation
 Keep the regulator as close to the tank as possible
and as high as possible.
 Minimize the length of the downstream pipe com-
ing from the valve.
Emergency
Pressure Vent
Blanketing
Valve
Control Line
Conservation Vent
Blanketing Gas
Control line
Control line should
slope downward toward
the tank to prevent
Condensation buildup.
1. Make the control line as short
and straight as possible.
2. Connect the control line to
the point where the pressure
is to be controlled.
3. Increase 1 pipe size for every
10 feet of control line, with
setpoints less than 5" w.c.
(0,012 bar).
Gas Supply