Jordan Valve Mark 627 Series - Gas Service Regulator - Manual

3170 Wasson Road • Cincinnati, OH 45209 USA
Phone 513-533-5600 • Fax 513-871-0105
[email protected] • www.jordanvalve.com
I & M Mark 627
Installation & Maintenance Instructions for
Mark 627 High Pressure Regulator
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.
Note: This document is to be used in conjunction with
The Mark 627 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 in-
stalled in a safe location and should be chosen
based upon the user’s specific application.
It is highly recommended that suitable pressure relieving
devices, as recommended by appropriate codes or stan-
dards, be installed in your system to assure that maxi-
mum rated pressures are not exceeded.
Installation
The Mark 627 should be chosen based upon the 1.
maximum, differential and outlet pressures as
described in Table 1. Flow capacities are listed in
Table 2. The operating temperature range is -20°F
to 180°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 orifice area. The resulting
decrease in orifice area may affect the regulators
ability to flow in sufficient volume for downstream
demand. Therefore, large pressure drop applica-
tions may require the use of more than one regula-
tor.
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 regu-
lator.
The regulator should be installed with the flow ar-
3.
row on the side of the body in the correct orienta-
tion to flow - i.e. higher pressure upstream, lower
regulated pressure downstream. As is true with
most regulators, the Mark 627 has an outlet pres-
sure rating that is lower than the inlet pressure rat-
ing. Over-pressure protection is needed to avoid
over-pressure if the actual inlet pressure can ex-
ceed the outlet pressure rating.
The regulator may be installed in any orientation
4.
as long as the flow is in proper agreement with
the flow arrow on the side of the body. However,
the regulator should be positioned such that the
screened vent will not collect debris or moisture.
Vent Line Option
The Mark 627 includes a vent in the upper housing (24).
If there is concern about build-up of gas in a confined
location, the vent assembly (25) may be removed to al-
low installation of a remote vent line. With the vent as-
sembly removed, a vent line may be installed into the ¾”
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 dia-
phragm. Failure to do so may result in property
damage and/or personal injury. Always employ
upstream and downstream pressure gauges to
monitor startup pressures.