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Fisher 670F Instruction Manual

670 series panel-mounted loading regulator

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Instruction Manual
Form 965
July 1987
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 Fisher In-
structions.
If a leak develops in the system, it indi-
cates that service is required. Failure to
take the regulator out of service immedi-
ately may create a hazardous condition.
Call a gas serviceman in case of trouble.
Only a qualified person must install or
service the regulator.
Introduction
The 670 Series panel-mounted loading regulator as-
semblies are used primarily for manually controlling
pressure to diaphragm control valves or as remote
pressure loaders for pressure-balanced gas regula-
tors. They are also widely used for remote control of
gas pressure to burners in refinery tube stills, power
plants, and similar process furnaces.
Installation
Inspect the panel after it is removed from its packing.
Connect a 1/4-inch pipe line from the operating supply
pressure to the connection marked "IN" on the pres-
sure regulator.
One and two-gauge panels: Connect a line to the dia-
phragm casing of the main valve or regulator and run it
to the connection marked "OUT" on the panel regula-
tor. When installing a two-gauge panel, connect a line
W0554-1/IL
Figure 1. Typical 670 Series Regulator; Two-Gauge
Panel with Three-Way Changeover Valve
from the control pressure line to the upper diaphragm
casing and to the 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.
Start-Up
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 hand-
wheel clockwise. To decrease the loading pressure,
turn the handwheel counterclockwise.
670 Series

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Summary of Contents for Fisher 670F

  • Page 1 WARNING Fisher regulators should be installed, operated, and maintained in accordance with federal, state, and local codes, rules and regulations, and Fisher In- structions. If a leak develops in the system, it indi- cates that service is required. Failure to take the regulator out of service immedi- ately may create a hazardous condition.
  • Page 2 Serial Number sure that none of the pressure limits will be exceeded. When corresponding with your Fisher representative about this equipment, be sure to include the serial The regulator assembly should be in- number that is stamped on the nameplate on the back spected for damage after any overpres- of the panel.
  • Page 3 670 Series AF5052-C/DOC Figure 2. Typical Installation of a Type 670 Regulator 30A6617-B/DOC Figure 3. Type 671 Regulator Assembly Drawing DC2668-D A1728-1/IL Figure 4. Type 670GV Regulator Assembly Drawing...
  • Page 4 (3.2 mm). There is space for 3 lines with up to 16 letters per line. Fisher, Fisher-Rosemount, and Managing The Process Better are marks owned by Fisher Controls International, Inc. or Fisher-Rosemount Systems, Inc. All other marks are the property of their respective owners.

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