LowFlow JRH Series High Pressure Regulator - Manual

3170 Wasson Road • Cincinnati, OH 45209 USA
Phone 513-533-5600 • Fax 513-871-0105
[email protected] • www.lowflowvalve.com
I & M JRH Series
Installation & Maintenance Instructions for
JRH Series Gas Pressure Reducing Valves
Warning: Low Flow 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 leak-
age 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 LowFlow/Jordan 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 LowFlow Valve
parts, available for immediate shipment from the factory.
Ideal Installation
Preferred Installation
Caution! Installation of adequate overpressure protec-
tion is recommended to protect the regulator from over-
pressure and all downstream equipment from damage
in the event of regulator failure.
An inlet block valve should always be installed. 1.
If service application is continuous such that shut- 2.
down is not readily accomplished, it is recommend-
ed that an inlet block valve, outlet block valve, and a
manual bypass valve be installed.
An outlet pressure gauge should be located ap- 3.
proximately ten pipe diameters downstream, and
within sight. If you have ordered your JR with outlet
gauge option on the valve outlet, please note that
the outlet pressure as registered on the gauge may
be slightly higher than a gauge located down-
stream.
All installations should include a downstream relief
4.
device if the inlet pressure could exceed the pres-
sure rating of any downstream equipment or the
maximum outlet pressure rating of the unit.
Flow Direction: install so that the flow direction
5.
matches the inlet/outlet marking on the main regula-
tor body (1).
For best performance, install in well drained horizon-
6.
tal pipe.
Basic regulator - regulator may be rotated around
7.
the pipe axis 360°. Recommended position is with
knob (14) vertical upwards.
Regulators are not to be buried underground.
8.
For insulated piping systems, recommendation is to 9.
not insulate regulator.
Principles of Operation
Movement occurs as pressure variations register 1.
on the diaphragm (3). The registering pressure is
the outlet, P2, or downstream pressure. The range
spring (5) opposes diaphragm (3) movement. As
outlet pressure drops, the range spring (5) pushes
the diaphragm (3) down, opening the port; as out-
let pressure increases, the diaphragm (3) pushes
up and the port opening closes.
A complete diaphragm (3) failure will cause the
2.
regulator to fail open.
Supply
P1
JRR
Bypass
To Drain
Outlet
P2
To Drain