67CFR-237 Fisher Instrument Supply Filter Regulator
Fisher 67CFR : filter regulators have an internal relief valve with a soft seat for reliable shutoff with no discernible leakage.
Fisher 67CFR-237 direct-operated regulators and filter regulators
are typically used to provide constantly controlled, reduced
pressures to pneumatic and electropneumatic controllers and other
instruments. These are suitable for most air or gas applications.
Other applications include providing reduced pressures to air
chucks, air jets, and spray guns.
Types 67CFR-Filter Capabilities
Free Area: 12 times pipe area
Micron Rating: Polyethylene Filter (Standard): 5 microns Glass Fiber Filter (Optional): 5 microns PVDF or Stainless Steel Filter (Optional): 40 microns
Drain Valve and Spring Case Vent Location
Aligned with inlet standard, other positions optional
Principle of Operation
Downstream pressure is registered internally on the lower side of
the diaphragm. When the downstream pressure is at or above the set
pressure, the valve plug is held against the orifi ce and there is
no fl ow through the regulator. When demand increases, downstream
pressure drops slightly allowing the spring to extend, moving the
stem down and the valve plug away from the orifi ce. This allows fl
ow through the regulator.
Internal Relief (Fisher 67CFR model )
If for some reason, outside of normal operating conditions, the
downstream pressure exceeds the setpoint of the regulator, the
force created by the downstream pressure will lift the diaphragm
until the diaphragm is lifted off the relief seat. This allows flow
through the token relief. The relief valve on the Type 67CFR is an
elastomer plug that prevents leakage of air from the downstream to
atmosphere during normal operation, thereby conserving plant air.
|End Connection||1/4" NPT|
|Maximum Inlet Pressure||250 psig / 17.2 bar|
|Spring Range||0-125 psi/ 0-8.6bar|
|Smart Bleed Check Valve Set point||6 psi / 0.41 bar differential|
Body Size and End Connection Style
Maximum Inlet Pressure (Body Rating)
250 psig / 17.2 bar
With Nitrile (NBR):
Standard Bolting: -20 to 180°F / -29 to 82°C
With Gauges: -40 to 180°F / -40 to 82°C