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 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 serviceman in case of trouble. Only a qualified person must install or service the regulator.
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-balanced 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.
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 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
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 handwheel clockwise. To decrease the loading pressure, turn the handwheel counterclockwise.
670 Series Table 1. Type Number Description Type Number
Number of Gauges
Maximum Inlet Pressure
Maximum Outlet Pressure
Maximum Emergency Outlet Pressure
Basic 1-gauge panel
1-gauge panel; regulator has filter
2-gauge panel; regulator has filter
2-gauge panel with 3-way changeover valve; regulator has filter
Basic 2-gauge panel
2-gauge panel with 3-way or 4-way changeover valve
Basic 1-gauge panel
Basic 1-gauge panel with 3-way changeover valve
Basic 2-gauge panel
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.
Overpressure Protection WARNING Overpressuring any portion of this equipment may cause damage to regulator parts, leaks in the regulator, or personal injury due to bursting of pressurecontaining 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. 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.
Regulator Type Number
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.
Maintenance The regulator can be removed from the panel to be disassembled. Take out the set screws or loosen the hex nut to remove the regulator from the panel. Refer to the appropriate instruction manual for further maintenance on the regulator.
Serial Number When corresponding with your Fisher representative 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 1
Description Regulator—Part numbers for the regulators used in the 670 Series are shown in the regulator instruction manuals
Figure 2. Typical Installation of a Type 670 Regulator
Figure 3. Type 671 Regulator Assembly Drawing
Figure 4. Type 670GV Regulator Assembly Drawing
670 Series Key 2
Description Gauge 0-5 psig 0-15 psig 0-30 psig 0-60 psig 0-100 psig 0-160 psig 0-200 psig 0-300 psig 0-400 psig 0-600 psig 0-60 psig & 0-4 kg/cm2 0-60-200 psig & 0-4-14 kc/cm2 Panel Types 670 & 670F, zinc Type 670FG, steel Type 670G, steel Types 670GV & 670FGV (3-way valve), steel Type 671, zinc Type 672V, zinc Type 675G, steel Clamp Bar, cd pl steel (4 reqâ€™d) Hex Nut, cd pl steel Types 670, 670F, 670FG, 670FGV, 671, & 675G (4 reqâ€™d) Types 670G, 670GV, & 672V (6 reqâ€™d) Machine Screw, steel (4 reqâ€™d) Tubing, copper Type 670 Type 670F Type 670FG Type 670FGV Type 670G Type 670GV Type 671 Type 672V Type 675G Fitting, brass Types 670, 670F, & 671 All other types Fitting, brass Types 670, 670F, & 672V Type 670FG Types 670FGV & 670GV (3 reqâ€™d) Type 670G Type 671 Type 675G (2 reqâ€™d) Nipple Types 670, 670F, & 670G, brass Types 670FGV, 670GV, & 675G, brass (2 reqâ€™d) Type 671, steel
23A8325 X012 2C2332 000B2 2C2332 000C2 2C2332 000D2 2C2332 000E2 2C2332 X0022 2C2332 000F2 2C2332 X00A2 2C2332 X0032 2C2332 X0042 1R7662 99012 1R7663 99012 1C2333 44012 3E6607 25132 3J8460 25132 3E6608 25132 1C2337 44012 1C7812 44012 3H1843 25132 1C2338 24162
Type 670FGV (one of each) Types 670G & 670GV (one of each)
16 1E9853 24142 1E9853 24142 1C2339 28992 19A1553 X012 19A1562 X012 19A1564 X012 19A1565 X012 19A1569 X012 19A1556 X012 19A1511 X012 19A1572 X012 19A1573 X012
15A6002 X272 15A6002 X262
1C6197 18992 15A6002 X172 15A6002 X172 15A6002 X212 15A6002 XA92 1C6197 18992
1B6782 18992 1B6782 18992 1H3929 26012
Description Fitting, brass Types 670 & 672V Type 670F Type 670FG Types 670FGV, 670G, & 670GV (2 reqâ€™d) Type 671 Type 675G (2 reqâ€™d) Tubing, copper Type 670GV Type 675G Changeover Valve Types 670FGV, 670GV, & 672V (2-way or 3-way) Gauge Service Marking(1) Types 670, 670F, 671, & 672V Type 670FG (one of each)
Type 675G (2 reqâ€™d) Machine Screw, pl steel Types 670FGV, 670GV, & 672V (2 reqâ€™d) Fitting, brass Type 670G Types 670GV & 670FGV (2 reqâ€™d) Valve Dial, plastic Type 670FGV (3-way valve) Type 670GV (2-way valve) Type 670GV (3-way valve) Type 672V (3-way valve) Machine Screw, steel Types 670, 670F, & 671 (2 reqâ€™d) Types 670FG, 670G, 672V, & 675G (4 reqâ€™d) Types 670FGV & 670GV (6 reqâ€™d) Tubing, copper Types 670FGV & 670GV (2 reqâ€™d) Support Post, brass Types 670FGV, 670GV, & 672V (2 reqâ€™d) (Not shown) Bleed Orifice & Screen Assâ€™y, brass/Monel Types 670, 670F, 670FG, 670FGV, & 670GV Type 671 Type 675G (2 reqâ€™d) Serial Plate, aluminum Hex Nut, pl steel Type 670FG (4 reqâ€™d) All other types (2 reqâ€™d) Fitting Type 671, malleable iron Type 670FGV & 670GV, brass Fitting, brass Types 670FGV, 670G, & 670GV Mounting Post, steel (3 reqâ€™d) (not shown)
Part Number 15A6002 X212 15A6002 X382 1L4720 18992 1C6197 18992 1D5016 21992 15A6002 X212 19A1560 X012 19A1574 X012
1C2695 18992 1C5386 06092 1C5386 06092 1C5387 06092 1L3355 06092 1L3356 06092 1C5386 06092 14A2561 X012 1C5386 06092 1C2703 28992 1C2698 18992 1C2698 18992 1L3511 06992 1D6367 X0021 1C2696 06092 1C7814 06992 1C2704 28992 1C2704 28992 1C2704 28992 19A1558 X012
1C2697 14012 1K8845 X0012 1D5015 X0012 1K8843 X0012 1C5840 11992 1A3303 28982 1A3303 28982 1D5017 21992 15A6002 X212 15A6002 X272 1F2449 X0012
1. A plate may be engraved with any service marking or terminology. Letter height is 1/8 inches (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. Fisher Controls International, Inc. 1987; All Rights Reserved
For information, contact Fisher Controls: Marshalltown, Iowa 50158 USA Cernay 68700 France Sao Paulo 05424 Brazil Singapore 128461 4 Printed in U.S.A.
Published on Jun 26, 2011
Published on Jun 26, 2011
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