LowFlow JBPH Series Back Pressure Regulating Valve - Manual

3170 Wasson Road • Cincinnati, OH 45209 USA
Phone 513-533-5600 • Fax 513-871-0105
lowfl [email protected] • www.lowfl owvalve.com
I & M JBPH Series
Installation & Maintenance Instructions for
JBPH Series Back Pressure Regulators
Warning: Low Flow Back Pressure Regulators must only be used, installed and repaired in accordance with these Installation & Maintenance Instruc-
tions. Observe all applicable public and company codes and regulations. In the event of leakage or other malfunction, call a qualifi ed service person;
continued operation may cause system failure or a general hazard. Before servicing any valve, disconnect, shut off, or bypass all pressurized fl uid.
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 protection is recom-
mended 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 shutdown is not readily
accomplished, it is recommended that an inlet block valve, outlet
block valve, and a manual bypass valve be installed.
3. An inlet pressure gauge should be located approximately ten pipe
diameters upstream, and within sight. If you have ordered your JBPH
with inlet gauge option on the valve body, please note that the
pressure as registered on the gauge may be slightly different than a
gauge located downstream.
4. All installations should include a upstream relief device if the inlet
pressure could exceed the pressure rating of any downstream
equipment or the maximum inlet pressure rating of the unit.
5. Flow Direction: install so that the fl ow direction matches the inlet/
outlet marking on the main regulator body (1).
6. For best performance, install in well drained horizontal pipe.
7. Basic regulator - regulator may be rotated around the pipe axis
360°. Recommended position is with knob (6) 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
(17). The registering pressure is the inlet, P1, or upstream pres-
sure. The range spring (3) opposes piston (17) movement. As
inlet pressure rises, the piston (17) pushes up against the spring
(3) opening the port; as inlet pressure decreases, the range spring
(3) pushes down and the port opening closes.
2. A complete piston seal (9,11) failure will cause the regulator to
fail closed.
Figure 1
JBPH