Fisher Controls 67 Series overview
Fisher Controls 67 Series Instrument Supply Regulator The 67 Series small-volume regulators (figure 1) are typically used to provide constantly controlled reduc...
Manufactured byFisher Controls
Part number or family67 Series
Product groupInstrument Supply Regulators
Product details
Manufactured byFisher Controls
Product groupInstrument Supply Regulators
DescriptionFisher Controls 67 Series Instrument Supply Regulator
OverviewThe 67 Series small-volume regulators (figure 1) are typically used to provide constantly controlled reduced pressures to pneumatic and electropneumatic controllers and other instruments. These self-operated regulators are suitable for most air or gas applications and may even be used for liquid service where material compatibility exists. Other applications include providing reduced pressures to air chucks, air jets, spray guns, and liquified petroleum gas (LPG) torches and burners.
Key FeaturesCompactness—The small size of the 67 Series regulators makes them particularly useful in installations with space limitations. Ease of Maintenance—No special tools are required to service these regulators, and they need not be removed from lines when servicing and repair are necessary. Filtering Action—A Type 67AF, 67AFR, 67AFS, or 67AFSR regulator (figure 2) has an internal filter to help clean impurities from the process fluid, removing particles that might damage the regulator or downstream equipment. The filter has a free area of 12 times the pipe area and can be obtained in glass, resin-impregnated cellulose, or stainless steel. Internal Relief—Although not designed to provide full overpressure protection, a token-capacity internal relief valve (indicated by an R in the type number as shown in table 1) allows partial reduction of downstream pressure without the necessity of an external relief valve being opened. The internal relief valve seat (figure 2 or 3) has a soft molded diaphragm insert. Panel Mounting—Some 67 Series regulators are available with either 1-hole or 3-hole panel mounting (figure 3). Tamper Resistant—To detect tampering with the outlet pressure setting, a Type 67AF or 67AFR regulator may be obtained with the adjusting screw wired to a machine screw or other body part after the outlet pressure is set. Sour Gas Service Capability—For sour gas, the body, spring case, and trim are available in materials that comply with National Association of Corrosion Engineers (NACE) Standard MR-01-75. High-Pressure Inlet Capability—Type 67H/67HR brass or Type 67SS/67SSR stainless steel construction allows inlet pressures of up to 400 psig (27.6 bar). Smooth, Close Regulation and High Stability—Regulator design (figure 2 or 3) isolates the diaphragm and pressure response chamber from the main flow stream. Second Outlet Pressure Tapping—Body side outlet connection is standard with the Type 67AFS, 67AFSR, 67SS, and 67SSR regulators and is available with all other types. A pipe plug or pressure gauge may be installed in the side outlet connection, and a Type 67 or 67R regulator additionally may have a tire valve installed in this connection.
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Fisher Controls
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Instrument Supply Regulators
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