LowFlow JRPL/JRPH Series Pressure Regulators - Manual

3170 Wasson Road • Cincinnati, OH 45209 USA
Phone 513-533-5600 • Fax 513-871-0105
[email protected] • www.lowflowvalve.com
I & M JRPH Series
Installation Instructions for JRPH Low Range
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 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 LowFlow Valve
parts, available for immediate shipment from the factory.
Ideal Installation
Preferred Installation
Caution! Installation of adequate overpressure pro-
tection is recommended to protect the regulator from
overpressure and all downstream equipment from
damage in the event of regulator failure.
1. An inlet block valve should always be installed.
2. If service application is continuous such that shut-
down is not readily accomplished, it is recommend-
ed that an inlet block valve, outlet block valve, and
a manual bypass valve be installed.
3. An outlet pressure gauge should be located ap-
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.
4. All installations should include a downstream relief
device if the inlet pressure could exceed the pres-
sure rating of any downstream equipment or the
maximum outlet pressure rating of the unit.
5. Flow Direction: install so that the flow direction
matches the inlet/outlet marking on the main regula-
tor body (1).
6. For best performance, install in well drained horizon-
tal pipe.
7. Basic regulator - regulator may be rotated around
the pipe axis 360°. Recommended position is with
adjusting screw (24) vertical upwards.
8. Regulators are not to be buried underground.
9. For insulated piping systems, recommendation is to
not insulate regulator.
Principles of Operation
1. Movement occurs as pressure variations register on
the piston (4). The registering pressure is the outlet,
P2, or downstream pressure. The range spring (12)
opposes piston (4) movement. As outlet pressure
drops, the range spring (12) pushes the piston (4)
down, opening the port; as outlet pressure increas-
es, the piston (4) pushes up and the port opening
closes.
2. A complete piston seal (19 & 27 ) failure will cause
the regulator to fail open.
Start Up
Caution! Don’t not exceed the maximum rated pres-
sure of the regulator if installed for a hydrostatic test.
Isolate the unit if the test is above the valve rating.
1. Start with the block valves closed. A bypass valve
may be used to maintain outlet pressure in the
downstream system without changing the following
steps.
2. Relax the range spring (12) by turning the adjusting
screw (24) counter-clockwise (CCW) until there is
no noticeable spring tension.
Supply
P1
JRPH
Bypass
To Drain
Outlet
P2
To Drain
Note: Do not use the regulator as a shut off device!