Lowflow JB Series Back Pressure Regulators Bedienungsanleitung PDF herunterladen

3170 Wasson Road • Cincinnati, OH 45209 USA

Phone 513-533-5600 • Fax 513-871-0105

lowﬂ[email protected] • www.lowﬂowvalve.com

I & M JB Series

Installation & Maintenance Instructions for

JB Series Back Pressure Regulators

Warning: Low Flow Back 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 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 disas-

sembling 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 pro-

tection is recommended to protect the regulator from

overpressure and all downstream equipment from dam-

age in the event of regulator failure. An inlet block valve

should always be installed.

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 recommended

that an inlet block valve, outlet block valve, and a

manual bypass valve be installed.

3. An inlet pressure gauge should be located approxi-

mately ten pipe diameters upstream, and within

sight. If you have ordered your JB with inlet gauge

option on the valve body, please note that the pres-

sure 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 pres-

sure rating of any downstream equipment or the

maximum inlet 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

knob (10) 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 diaphragm (5). The registering pressure

is the inlet, P1, or upstream pressure. The range

spring (8) opposes diaphragm (5) movement. As

inlet pressure rises, the diaphragm (5) pushes up

against the spring (8) opening the port; as inlet

pressure decreases, the range spring (8) pushes

down and closes the port.

2. A complete diaphragm (5) failure will cause the

regulator to fail closed.

1 Shut off Valve

2 Pressure Gauge

3 JB Series Regulator

By-pass line

Main line

1 2 3 4

Inhaltsverzeichnis

Seite 1 - I & M JB Series

3170 Wasson Road • Cincinnati, OH 45209 USAPhone 513-533-5600 • Fax 513-871-0105lowﬂ[email protected] • www.lowﬂowvalve.comI & M JB Serie

Seite 2 - Maintenance

Start UpCaution! Do not exceed the maximum rated pressure of the regulator if installed for a hydrostatic test. Isolate the unit if the test is above

Seite 3 - Troubleshooting

-3-C. Diaphragm ReplacementCaution! To prevent damage to body, use soft jaws when placing the body in a vise. Position so that vise closes over the ﬂ

Seite 4 - Cross Section View

Cross Section View3170 Wasson Road • Cincinnati, OH 45209 USAPhone 513-533-5600 • Fax 513-871-0105lowﬂ[email protected] • www.lowﬂowvalve.com

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Lowflow JB Series Back Pressure Regulators Bedienungsanleitung

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