Features & Benefits
      Stable output and repeatability - provides constant control under variable flow rates and supply pressures.
      Corrosion-resistant construction - aluminum die-castings are finished with Irridite and baked epoxy paint.
      Depth filter -unit comes equipped with high capacity 3 micron filter housed in drip-well
      Self-Relieving
       Low droop at high flow levels - aspirator design helps maintain set pressure at higher flow levels
       Tight shut-off - a soft, rubberized valve provides a positive shut-off and compensates for dirt and other foreign matter

Description
     The Model 91-HF Filter-Regulator is designed to provide clean, accurate  air pressure to valve positioners, and other
pneumatic control equipment. The filter regulator has been proven to provide long lasting corrosion resistance in harsh
industrial environments. The model 91-HF filter regulator is a quality unit that is ideal as an economical alternative for
control of process applications.
      The Model 91-HF is used extensively to supply air to pneumatic controllers, transmitters, transducers, valve
positioners, air cylinders, and a wide range of pneumatic control systems.

Specifications
Performance Specifications
Output Range：0-120 psig (0-800 kPa)
Maximum Supply Pressure：150 psig (1034 kPa)
Flow Capacity：22 SCFM (37.0 m3/hr) at 100 psig (700 kPa)
Exhaust Capacity：0.1 SCFM (0.17 m3/hr) with downstream pressure 5 psig (35 kPa) above set point
Sensitivity：1” (2.5 cm) of water
Air Consumption：Less than 5 SCFM (0.17 m3/hr)
Effect of Supply Pressure Variation：Less than 0.2 psig (1.4 kPa) for 25 psi (170 kPa) change
Ambient Temperature Limits：0 to 160°F (-18 to 71°C)

Mechanical Specifications
Mounting：Pipe or through body
Weight：1.6 lb (725 g)
Port Size：(In, Out, and Gauge) 1/4” NPT
Materials of Construction：Body: Die-cast aluminum alloy, Irridite and baked Epoxy finish
                                    Filter: 3 micron Phenolic impregnated Cellulose
Diaphragm: Nitrile Elastomer and Nylon fabric
Valve Seat Plug: Nitrile Elastomer
Additional Materials: Brass, Zinc plated steel, Acetal
Mounting Dimensions