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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 qualified person must install or
service the regulator.
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 refinery 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
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
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
670 Series
Three-Way Changeover Valve
WARNING
!
Related Manuals for Emerson FISHER 670 Series
Summary of Contents for Emerson FISHER 670 Series
- Page 1 ® 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.
- Page 2 670 Series Table 1. Type Number Description MAXIMUM INLET MAXIMUM OUTLET MAXIMUM EMERGENCY NUMBER REGULATOR PRESSURE PRESSURE OUTLET PRESSURE TYPE DESCRIPTION OF GAUGE TYPE NUMBER psig psig psig Basic 1-gauge panel 67CR 670F 1-gauge panel; regulator has filter 67CFR 17.2 670FG 2-gauge panel;...
- Page 3 670 Series TYPE 670G LOADING REGULATOR CONTROL PRESSURE LOADING PRESSURE OPERATING MEDIUM 200 FT / 61 m OR LESS TYPE 796EK MAIN VALVE AF5052-C Figure 2. Typical Installation of a Type 670 Regulator 30A6617 Figure 3. Type 671 Regulator Assembly Drawing INSTRUMENT OUTPUT SUPPLY...
- Page 4 For further information visit www.fisherregulators.com The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the property of their prospective owners. Fisher is a mark owned by Fisher Controls International LLC, a business of Emerson Process Management.