Jordan Valve Mark 608BP User Manual

I & M Mark 608BP

3170 Wasson Road • Cincinnati, OH 45209 USA

Phone [phone] • Fax [phone]

[e-mail] • www.jordanvalve.com

Installation & Maintenance Instructions for

Mark 608BP Gas Pressure Regulators

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!

available from Jordan Valve.

5. The flow arrow on the regulator body must be

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.

pointed in the direction of flow. The regulator may
be installed in any position. The actuator may be
rotated to any position relative to the body (see siz­ing.) Loosen the union nut and position the actua­tor. Pull the union nut up hand-tight, then tighten ¼
turn. (The union nut is 8-sided and may be used as
a guide.)

Ideal Installation

6. Provisions are provided to vent the case from the
top or bottom by a ¼” pipe tap opening. One open-

4

1

3

5

2

7

1

2

4

6

R

ing is plugged, the other has a screened (bug) vent.
Reverse these if it is desired open vents should
point downward; a street elbow can be used if
needed. Some installations will require that this
vent be piped to some location external to the
regulator. When remote piping is used, ¼” size is
adequate. NEVER BLOCK OFF THE VENT LINE. Fol-

1

By-Pass Line

1. Shut off Valve

2. Pipe Union

3. Strainer and Drain Valve

4. Pressure Gauge

5. Jordan Regulator

6. Relief Valve

7. Sensing Line

1. To protect the regulator 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.

low local regulations.

7. Install a relief valve downstream from the regulator
to protect downstream components from over­pressurization. Generally, the setting of the relief
valve should be at least 20% greater than the regu­lator set point. It must have adequate flow capacity
to protect the downstream components should the
regulator fail to shut off.

8. Operate the regulator within its rated pressure and
temperature. The standard Mark 608BP is rated
at 150 psig max (inlet or outlet section) at -20 to
+200°F. Regulator ratings and materials of con­struction are listed on the valve name plate.

2. Shutoff valves, pressure gauges and by-pass piping
should be installed as indicated in the Installation

Sizing

Schematic to provide easier adjustment, operation,
and testing.

3. In preparing threaded pipe connections, care

Refer to the sizing charts for the flow capacity of the
regulator under various conditions.

should be exercised to prevent pipe sealing com­pound from getting into the pipe lines. Pipe sealing
compound should be used sparingly, leaving the
two end threads clean. Jordan recommends Teflon
tape.

4. A line strainer should be installed on the inlet side
of the regulator to protect pipe from grit, scale and

Because of the weight of the diaphragm assembly and
friction in the moving parts, there is a difference in the
lowest setpoint attainable when the actuator housing is
upright, or inverted. (Upright refers to the spring hous­ing cap pointing vertically up.) Lower set points can be
achieved with the housing inverted.

other foreign matter. A 0.033 perforated screen is
usually suitable for this purpose. Line strainers are

With this information, refer to the flow capacity chart in

the Mark 608 Product Bulletin. Always use the smallest
orifice diameter possible to reduce outlet pressure varia­tions caused by inlet pressure variations.

parts and for proper nomenclature.

A. DIAPHRAGM OR GASKET REPLACEMENT

Start-Up

1. Fully open the outlet shut-off valve.

2. Slowly open the inlet shut-off valve.

3. Slowly open and close the outlet shut-off valve
several times. This fully strokes the valve to insure
satisfactory operation.

4. With the outlet shut-off valve open and preferably
at a low flow, slowly turn the adjusting screw until
the desired pressure is shown on the outlet pres­sure gauge.

5. To change the controlled pressure, turn the ad­justing screw clockwise to increase pressure, and
counterclockwise to decrease pressure.

Trouble Shooting

If You Experience Erratic Control:

 Oversizing causes cycling and hunting and reduces

the rangeability of the valve. Make certain that your
sizing is correct.

 Attempting to exceed flow capacity. Make certain

that your sizing is correct.

 Blocked vent line or vent passage in spring hous-

ing. Clean.

 Inlet pressure varying greatly. Stabilize or use sec-

ond regulator to control inlet pressure closer.

 Aspirator blocked. Clean.

If You Cannot Set Outlet Pressure:

 Orifice too large for inlet pressure. Refer to Sizing.
 Improper spring.

If the Valve Will Not Operate:

 Diaphragm ruptured. Replace.
 Adjusting spring broken. Replace.
 Improper spring setting. Reset.

Maintenance

WARNING: Be sure that there is no pressure in the
valve before loosening any fittings or joints. The fol­lowing steps are recommended:

1. Close the inlet shut-off valve, and by-pass valve.

2. Back off adjusting screw to allow inlet pressure to
open seats.

3. Allow pressure to bleed off through downstream
piping.

4. When the inlet pressure gauge indicates no pres­sure in the line, close the outlet shut-off valve.

Refer to the drawings for the proper orientation of the

1. Remove all pressure from the line as outlined un­der WARNING.

2. Remove the compression of the adjusting spring
(22) by rotating the adjusting screw (19) counter­clockwise.

3. Loosen the spring housing bolts (16) and remove
spring housing.

IF DIAPHRAGM IS NOT BEING REPLACED,
SKIP STEPS 4 THRU 8.

4. Remove diaphragm subassembly by sliding it away
from the valve body to disengage the lever arm (7).

5. Hold the lower diaphragm plate (5) and remove the
screw (6), separating the parts.

6. Clean the surfaces on the upper and lower dia­phragm plates that the diaphragm (3) seats against.
Clean and degrease the threads on the lower dia­phragm plate and the screw. (Degrease with Loc­tite primer T.)

7. Assemble the upper and lower diaphragm plates
to the new diaphragm with the screw. (Apply a few
drops of Loctite #290 to the screw threads to lock
the parts together.) The hole through the lower dia­phragm plate must align with any pair of opposite
holes in the diaphragm so that it will properly en­gage the lever when reassembled into the valve.

8. Clean the flange surface on the diaphragm housing
and reinstall the diaphragm subassembly onto the
lever arm.

9. Clean the flange surface on the spring housing and
install a new gasket. The gasket may be temporarily
held in place using a few dabs of grease.

10. Set the spring housing on top of the diaphragm
housing. Using a 6” long screwdriver, or similar
tool, reach through the spring housing and push
the diaphragm down to align the diaphragm holes
with the housings’ holes.

11. Drop the bolts into place and attach the lockwash­ers and nuts, finger-right.

12. Continue to push the diaphragm down and snug­up the bolts.

13. Evenly torque the bolts as described in the Torque
Procedure Section.

14. Install the spring and adjusting screw. (Adjusting
spring per start-up instructions and replace cap.)

B. SEAT INSERT, PLUG, OR ASPIRATOR REPLACEMENT

CAUTION: When replacing a plug or seat insert,
the lever must also be replaced to insure shutoff.

1. Remove all pressure from the line as outlined un­der WARNING.

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