Emerson 670 Instruction Manual

Instruction Manual
Form 965

February 2015

670 Series Panel-Mounted Loading
Regulator Assemblies

WARNING

!

Fisher® regulators should be installed,
operated and maintained in accordance
with federal, state and local codes, rules
and regulations and Emerson Process
Management Regulator Technologies,
Inc. instructions.

If a leak develops in the system, it indicates
that service is required. Failure to take the
regulator out of service immediately may
create a hazardous condition.

Call a gas service person in case of trouble.

Only a qualied person must install or

service the regulator.

670 Series

Introduction

The 670 Series panel-mounted loading regulator assemblies
are used primarily for manually controlling pressure to
diaphragm control valves or as remote pressure loaders for
pressure-balance gas regulators. They are also widely used

for remote control of gas pressure to burners in renery tube

stills, power plants and similar process furnaces.

Principle of Operation

The 670 Series regulators are set manually to control supply
pressure to diaphragm control valves or gas regulators.
Instrument and manual loading pressures are read from the
pressure gauges of the regulator. If pressure to the valve
needs to be adjusted, the regulator handwheel is turned
clockwise to increase the supply pressure or counterclockwise
to decrease the supply pressure.

Installation

Inspect the panel after it is removed from its packing.
Connect a 1/4 in. / 6.4 mm pipe line from the operating
supply pressure to the connection marked “IN” on the
pressure regulator.

One and two-gauge panels: Connect a line to the diaphragm
casing of the main valve or regulator and run it to the
connection marked “OUT” on the panel regulator. When
installing a two-gauge panel, connect a line from the control
pressure line to the upper diaphragm casing and to the

W0554

Figure 1. Typical 670 Series Regulators: Two-Gauge Panel with

Three-Way Changeover Valve

control pressure gauge (instrument loading pressure) in the
back of the panel (see Figure 2).

Two-gauge panel with a three-way changeover valve:
Connect the air supply, diaphragm connection and
instrument loading pressure line to the panel regulator as
shown in Figure 4.

Overpressure Protection

WARNING

!

Overpressuring any portion of this equipment
may cause damage to regulator parts, leaks
in the regulators or personal injury due to
bursting of pressure-containing parts or
explosion of accumulated gas.

To avoid overpressure, provide appropriate
overpressure protection to ensure that none of
the pressure limits will be exceeded.

The regulator assembly should be inspected for
damage after any overpressure condition.

www.fisherregulators.com

D200109X012

670 Series

Table 1. Type Number Description

TYPE

670 1 Basic 1-gauge panel 67CR

670FG 2 2-gauge panel; regulator has lter 67CFR

670FGV 2

670G 2 Basic 2-gauge panel 67CR 250 17.2 100 6.9 11 0 7.6

670GV 2 2-gauge panel with 3-way or 4-way changeover valve 67CR 50 3.5 50 3.5 55 3.8

671 1 Basic 1-gauge panel 912N 250 17.2 5 0.35 10 0.69

675 2 Basic 2-gauge panel 67CR 250 17.2 100 6.9 11 0 7.6

NUMBER

OF GAUGE

DESCRIPTION

2-gauge panel with 3-way changeover valve;

regulator has lter

REGULATOR

TYPE NUMBER

67CFR 50 3.5 50 3.5 55 3.8

MAXIMUM INLET

PRESSURE

psig bar psig bar psig bar

250 17.2 100 6.9 110 7.6 670F 1 1-gauge panel; regulator has lter 67CFR

MAXIMUM OUTLET

PRESSURE

MAXIMUM EMERGENCY

OUTLET PRESSURE

As is the case with most regulators, regulators in the
670 Series have outlet pressure ratings which are lower than
the inlet pressure ratings. Overpressure protection is needed if
the actual inlet pressure can exceed the outlet pressure rating.
A common method of overpressure protection is a relief valve.

Maximum emergency outlet pressure ratings are shown in
Table 1 for each loading regulator.

Startup

Open the air supply line. Check all connections for leaks. The
manual loading pressure gauge indicates the loading pressure
on the diaphragm of the main valve. To increase the loading
pressure, turn the handwheel clockwise. To decrease the
loading pressure, turn the handwheel counterclockwise.

Units with a three-way changeover valve may be placed
under manual operation. When changing from manual
to automatic or from automatic to manual control, set the
manual control pressure gauge to read the same as the
instrument pressure in order to prevent bumping.

Maintenance

The regulator can be removed from the panel to be nut
disassembled. Take out the set screws or loosen the hex to
remove the regulators from the panel. Refer to the appropriate
instruction manual for further maintenance on the regulator.

Parts Ordering

When corresponding with your local Sales Ofce about

this equipment, be sure to include the serial number that is
stamped on the nameplate on the back of the panel. Include
the complete eleven-character part numbers from the following
Parts List when ordering new parts.

Parts List

Key Description Part Number

1 Regulator—Part numbers for the regulators

used in the 670 Series are shown in the
regulator instruction manuals

Key Description Part Number

2 Gauge
0 to 5 psig / 0 to 0.35 bar 23A8325X012
0 to 15 psig / 0 to 1.0 bar 2C2332000B2
0 to 30 psig / 0 to 2.1 bar 2C2332000C2
0 to 60 psig / 0 to 4.1 bar 2C2332000D2
0 to 100 psig / 0 to 6.9 bar 2C2332000E2
0 to 160 psig / 0 to 11.0 bar 2C2332X0022
0 to 200 psig / 0 to 13.8 bar 2C2332000F2
0 to 300 psig / 0 to 20.7 bar 2C2332X00A2
0 to 400 psig / 0 to 27.6 bar 2C2332X0032
0 to 600 psig / 0 to 41.3 bar 2C2332X0042
0 to 60 psig / 0 to 4.1 bar and 0 to 4 kg/cm2 1R766299012
0 to 60 to 200 psig / 0 to 4.1 to 13.8 bar
and 0 to 4 to 14 kg/cm2 1R766399012
3 Panel
Types 670 and 670F, Zinc 1C233344012
Type 670FG, Steel 3E660725132
Type 670G, Steel 3J846025132
Types 670GV and 670FGV (3-way valve),
Steel 3E660825132
Type 671, Zinc 1C233744012
Type 675G, Steel 3H184325132
4 Clamp bar, Cadmium Plate steel (4 required) 1C233824162
5 Hex Nut, Cadmium Plate Steel
Types 670, 670F, 670FG, 670FGV, 671
and 675G (4 required) 1E985324142
Types 670G and 670GV
(6 required) 1E985324142
6 Machine Screw, Steel (4 required) 1C233928992
7 Tubing, Copper
Type 670 19A1553X012
Type 670F 19A1562X012
Type 670FG 19A1564X012
Type 670FGV 19A1565X012
Type 670G 19A1569X012
Type 670GV 19A1556X012
Type 671 19A1511X012
Type 675G 19A1573X012
8 Fitting, Brass
Types 670, 670F and 671 15A6002X272
All other types 15A6002X262
9 Fitting, Brass
Types 670 and 670F 1C619718992
Type 670FG 15A6002X172
Types 670FGV and 670GV (3 required) 15A6002X172
Type 670G 15A6002X212
Type 671 15A6002XA92
Type 675G (2 required) 1C619718992

2