Lowflow JBDL Series Back Pressure Valves 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 JBDL Series

Installation & Maintenance Instructions for

JBDL Series Back Pressure Regulators

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

Refer to Figure 1.

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 inlet pressure gauge should be located approxi-

mately ten pipe diameters upstream, and within

sight. If you have ordered your JBDL 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 an 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 assembly (3) 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 (8). The registering pressure is the

inlet, P1, or upstream pressure. The range spring (4)

opposed diaphragm (8) movement. As inlet pres-

sure rises, the diaphragm (8) pushes up against the

range spring (4) opening the port. As inlet pressure

decreases, the range spring (4) pushes down and

closes the port.

2. A complete diaphragm (8) failure will cause the

regulator to fail closed.

Start Up

Caution! Do not exceed the maximum rated pressure

of the regulator if installed for a hydrostatic test. Iso-

late the unit if the test is above the valve rating.

1. Start with the block valves closed. A bypass valve

should be used to maintain upstream pressure in the

system without changing the following steps.

2. Relax the range spring (4) by turning the adjusting

JBDL

Figure 1.

To Drain To Drain

Supply

Outlet

Bypass

1 2 3 4

Inhaltsverzeichnis

Seite 1 - I & M JBDL Series

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

Seite 2 - Maintenance

knob (3) counter-clockwise (CCW) until there is no noticeable spring tension. 3. Slowly open the inlet block valve. Note: if no bypass valve is insta

Seite 3 - Troubleshooting

TroubleshootingIf You Experience Erratic Control:• Regulator may be oversized. Oversizing causes cycling and hunting, and reduces the rangeability of

Seite 4 - Cross Section View

Bulletin IM-JBDL-04143170 Wasson Road • Cincinnati, OH 45209 USAPhone 513-533-5600 • Fax 513-871-0105lowﬂ[email protected] • www.lowﬂowvalve.

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Lowflow JBDL Series Back Pressure Valves Bedienungsanleitung

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