Lowflow JRHF Series Pressure Regulating 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 JRHF Series

Installation & Maintenance Instructions for

JRHF Series Pressure Reducing Valves

Warning: LowFlow 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 outlet pressure gauge should be located ap-

proximately ten pipe diameters downstream, and

within sight. If you have ordered your JRHF 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

knob (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 outlet, P2, or downstream pressure. The range

spring (4) opposes diaphragm (8) movement. As

outlet pressure drops, the range spring (4) pushes

the diaphragm (8) down, opening the port; as out-

let pressure increases, the diaphragm (8) pushes

up and the port opening closes.

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

regulator to fail open.

Start Up

Caution! Do 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

Supply

JRHF

Bypass

To Drain

Outlet

To Drain

Figure 1.

1 2 3 4

Inhaltsverzeichnis

Seite 1 - I & M JRHF Series

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

Seite 2 - Maintenance

downstream system without changing the following steps.2. Relax the range spring by turning the adjusting knob (3) counter clockwise (CCW) until ther

Seite 3 - Troubleshooting

-3-repair kit into the body. The larger diaphragm plate (6) should be on top.11. Place the range spring (4) on top of the diaphragm assembly, and th

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 JRHF Series Pressure Regulating Valves Bedienungsanleitung

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