Jordan Valve Mark 630 User Manual

I & M Mark 630

3170 Wasson Road • Cincinnati, OH 45209 USA

Phone [phone] • Fax [phone]

[e-mail] • 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 qualied service person; continued operation may cause system failure or a
general hazard. Before servicing any valve, disconnect, shut off, or bypass all pressurized uid. Before disassembling
a valve, be sure to release all spring tension.

Note: This document is to be used in conjunction with
Mark 630 Series Cut Sheet.

WARNING! Over-pressure of this regulator or
installation of the regulator in applications which
may see pressure levels beyond those for which
the regulator is designed may result in leakage
and/or catastrophic failure. This failure could
result in leaking gas, damage to surrounding
equipment, personal injury or death. To prevent
such damage/injury the regulator should be in­stalled in a safe location and should be chosen
based upon the user’s specic application.

It is highly recommended that suitable pressure relieving
devices, as recommended by appropriate codes or stan­dards, be installed in your system to assure that maxi­mum rated pressures are not exceeded.

Installation

The Mark 630 should be chosen based upon the 1.
maximum inlet pressures, pressure drops and out­let pressures as described in Table 1 and 2. Flow
capacities are listed in Table 4. The operating tem­perature range is -20°F to 150°F. When choosing
and installing a regulator one must ensure that the
conditions do not exceed these parameters. Fur­thermore, large differentials in pressure across the
regulator may result in the formation of ice in the
orice area. The resulting decrease in orice area

Installation & Maintenance Instructions for

Mark 630 High Pressure Regulator

may affect the regulators ability to ow in sufcient
volume for downstream demand. Therefore, large
pressure drop applications may require the use of
more than one regulator.
Make sure that line pressure has been eliminated 2.
prior to the installation of any regulator. Prior to
installation the line should be inspected to ensure
that there is no debris that might damage the regu­lator. Install regulator with properly sized threaded
connections and utilizing thread sealant.
The regulator should be installed with the ow ar-3.
row on the side of the body in the correct orienta­tion to ow - i.e. higher pressure upstream, lower
regulated pressure downstream. As is true with
most regulators, the Mark 630 has an outlet pres­sure rating that is less than the inlet pressure rating.
Overpressure protection must be provided to avoid
over-pressure condition if the actual inlet pressure
can exceed the outlet pressure rating. Refer to Ta­bles 1 and 2 for maximum inlet pressures, pressure
drops and outlet pressure ranges.
The regulator may be installed in any orientation 4.
as long as the ow is in proper agreement with
the ow arrow on the side of the body. However,
the regulator should be positioned such that the
screened breather (24) will not collect debris or
moisture.

Vent Line Option

The Mark 630 includes a vent or Breather (24) in the
Spring Housing (3). If there is concern about build-up
of gas in a conned location, the Breather may be re­moved to allow installation of a remote vent line. With the
Breather removed, a vent line may be installed into the
¼” NPT port. This vent line should be as large a diameter
as possible and should utilize minimal bends and el­bows. Furthermore, the vent line opening should be pro­tected from weather or debris and should be checked
regularly for blockage.

Start-Up Operation

WARNING! Release downstream pressure to
prevent a potential over-pressure of the dia­phragm. Failure to do so may result in property
damage and/or personal injury. Always employ
upstream and downstream pressure gauges to
monitor startup pressures.

With the regulator isolated with shutoff valves on both
the upstream and downstream sides, slowly open up­stream valve followed by slowly opening the downstream
valve. Check all connections for leaks and make neces­sary output adjustments by manipulating the adjusting
screw (1) per the adjustment procedures below.

Adjustment

The range of adjustment for a particular regulator is 1.
indicated on the nameplate. Different ranges can
be achieved by substituting a different spring (5).

IMPORTANT: If a new spring is installed the
nameplate must be remarked to indicate the
new pressure range.

Refer to Tables 1 & 2 prior to adjustment for pres-2.
sure and ow information, assuring that the chosen
spring will facilitate the desired pressure regulation
and that the maximum pressure output does not
exceed the downstream system pressure limits.
Loosen the jam nut (2).3.
To INCREASE pressure:4. Turn adjustment screw
clockwise.
To DECREASE pressure:5. Turn adjustment screw
counterclockwise.
Once the desired pressure is achieved, hold adjust-6.
ment screw while securing the jam nut.

Shutdown

WARNING! Downstream pressure must be re­leased to prevent an over-pressurization of the
diaphragm. Failure to do so may result in prop­erty damage and/or personal injury.

Close the upstream block valve followed by closing 1.
the downstream block valve.
Open the nearest vent valve between the regulator 2.
and the downstream block valve.

(14) to hold the valve in an open condition. As the outlet
pressure exceeds the set pressure, the diaphragm, act­ing upon the lower spring guide compresses the spring
allowing the lever assembly to close the valve until the
outlet pressure equalizes with the set pressure.

Maintenance

Routine maintenance should be expected due to normal
wear and tear, damage from external sources or debris.
The regulator components, especially the moving and
sealing parts, should be inspected periodically and re­placed as necessary. Frequency of inspection/replace­ment depends upon severity of conditions, but may also
be required by local/state/federal law or industry stan­dards.

Large pressure drops or large amounts of particulate in
the ow will result in accelerated wear on the valve disc
assembly (21) and orice (20).

Replacing the Orice, Lever Assembly and Disk
Assembly

Disconnect piping form inlet adapter (18), removing 1.
adapter and four cap screws (17).
Remove orice (20) and inlet body gasket (19).2.
Remove vent piping if it is installed.3.
Remove two cap screws (8), which secure the dia-4.
phragm adapter (13) to the body (23). Remove the
diaphragm adapter and spring case (3) as a unit.
If the lever assembly is to be replaced, drive out 5.
the pin (15) and slide the lever assembly out of the
diaphragm adapter. When replacing the lever as­sembly, make sure that the slot engages the con­nector head assembly (12). Replace the pin.
Remove the valve carrier (22) from the body.6.
Use a ¾” socket to remove and reinstall the valve 7.
disc and holder.
Discard old inlet body gaskets and replace with 8.
new. Reinstall the valve carrier into the body.
Reinstall the diaphragm adapter/spring housing 9.
unit, making sure that the lever assembly properly
engages the valve carrier. Finally, tighten the two
cap screws that secure the diaphragm adapter/
spring housing unit to the body. IMPORTANT:
Spring case (3) must be oriented such that it points
away from the inlet adapter (18).
Reinstall the inlet adapter to the body, installing and 10.
tightening four cap screws.

Operation

When the outlet pressure is lower than the set pres­sure, force generated by the spring (5) upon the spring
guide (7) and diaphragm (11) causes the lever assembly

Replacing the Diaphragm

Remove spring tension by loosening the jam nut (2) 1.
and turning the adjusting screw (1) counterclock­wise until all spring compression is relieved.

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