Jordan Valve Mark 687 Series - Piloted Regulator with Class VI Shutoff - Manual

3170 Wasson Road • Cincinnati, OH 45209 USA
Phone 513-533-5600 • Fax 513-871-0105
[email protected] • www.jordanvalve.com
I & M Mark 687 Series
Installation & Maintenance Instructions for
Mark 687 Piloted Soft Seated Regulator
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.
Control Line
A control line must be connected to the regulator as
follows:
1. Connect one end of a 3/8” control line to the 1/4”
npt port in the center of the upper case.
2. Connect the other end to a straight run of pipe 3 to
5 feet in length downstream of the regulator.
3. DO NOT locate the control line tap in an elbow,
swage, or other changes in configuration of the pipe-
line where turbulence or abnormal velocities may
occur. Any connection should be at least 2 feet away
from such a fitting.
4. DO NOT locate the control line tap in a vessel lo-
cated downstream of the valve. Instead, locate the
tap in the line 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. Ideally, a gauge should be installed in the control
line near the regulator to assist in setting the
product.
With the inlet, outlet, and bypass shutoff valves closed, an
no pressure in the downstream line:
1. Fully open the control line shutoff valve.
2. Fully open the outlet shutoff valve.
3. Open the inlet shutoff valve just enough to hear flow
start running through the regulator. Observe the
downstream pressure gauge. Once pressure is seen
on this gauge, slowly open the inlet shutoff valve the
remainder of the way until fully open.
4. To change the set pressure, turn the adjusting screw
on the top of the pilot valve to get the regulated
pressure to the desired set point.
5. Secure the jam nut on the adjusting screw.
Maintenance
Caution: Ensure that the valve is de-pressurized
before loosening any fittings or joints. The following
steps are recommended before proceeding with any
maintenance on the valve.
1. Allow all pressure to bleed off through the down-
stream piping. Do not attempt to reverse the pres-
sure through the regulator by bleeding the pressure
from the upstream piping.
2. When the pressure gauges indicate that all the pres-
sure has been removed from the system, close the
outlet shutoff valve and control line shutoff valve.
Note: Refer to the drawing at the end of this docu-
ment for descriptions and proper orientation of the
parts.
Pilot Valve
1. Remove the tubing that connects the pilot valve to
the main valve.
2. Unscrew the pilot from the pipe nipple on the main
valve.
Pilot Diaphragm
1. Release the spring tension of the range spring (5)
by turning the adjusting screw (1) counter-clockwise
until free.
2. Remove the spring housing bolts (7), spring hous-
ing (3), spring guide (4), range spring (5), and upper
diaphragm plate (6) from the pilot body (14).
3. Remove and replace pilot diaphragm, and assemble
in reverse order.
4. Spring housing bolts should be evenly cross-torqued
to 200 in-lbs.
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