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Siemens Industry, Inc.
INTRODUCTION
The Model 91-HF Filter Regulator removes impurities from an air supply and delivers
an accurate output pressure.
SPECIFICATIONS
Port Size
Output Range
Max Supply Pressure
Mounting
Flow Capacity
Exhaust Capacity
Sensitivity
Air Consumption
Effect of Supply
Pressure Variation
Ambient Temp Limits
Weight
MATERIALS OF CONSTRUCTION
Body
Filter
Diaphragm
Valve Seat Plug
Additional Materials
INSTALLATION
Install the regulator as close as possible to the instrument or tool it is to service. For best filter drainage, orient the drain
valve so that it is at the lowest point on the drip-well housing. The words "IN" and "OUT" are cast into the body to indicate
the direction of flow. See Specifications for port size. Installation dimensions are shown on the next page.
INSTALLATION AND SERVICE INSTRUCTION
Model 91-HF
Filter Regulator
(In, Out and Gauge) ¼" NPT
0-120 psig (0-800 kPa)
150 psig (1034 kPa)
Pipe or Through Body
3
22 SCFM (33.0 m
/hr) at 100 psig (700 kPa) supply with 20 psig (140 kPa) output
3
0.1 SCFM (0.17 m
/hr) with downstream pressure 5 psig (35 kPa) above set point
1" (2.5 cm) of water
Less than 5 SCFM (0.17 m
Less than 0.2 psig (1.4 kPa) for 25 psi (170 kPa) change
0° to 160°F (-18° to 71°C)
1.6 lb (725 g)
Diecast Aluminum Alloy, Irridite and Baked Epoxy Finish
3 Micron Phenolic Impregnated Cellulose
Nitrile Elastomer and Nylon Fabric
Nitrile Elastomer
Brass, Zinc Plated Steel, Acetal
3
/hr)
UM91-HF
Rev 6
July 2012
Supersedes Rev 5
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Summary of Contents for Siemens 91-HF
- Page 1 Rev 6 July 2012 Supersedes Rev 5 Model 91-HF Filter Regulator INTRODUCTION The Model 91-HF Filter Regulator removes impurities from an air supply and delivers an accurate output pressure. SPECIFICATIONS Port Size (In, Out and Gauge) ¼" NPT Output Range...
- Page 2 (IN) pressure must not exceed 150 psig. IMPORTANT The Model 91-HF filter regulator has low capacity internal relief, which provides very limited downstream over-pressure protection. To avoid exceeding the output pressure limits in service, a pressure relieving or pressure-limiting device should be provided.
- Page 3 UM91-HF OPERATION Prior to turning on supply air, back off the adjusting screw until there is no compression of the range spring; refer to dimension and assembly drawings as needed. After turning the supply pressure on, turn the adjusting screw clockwise to increase outlet pressure.
- Page 4 Siemens Industry, Inc. assumes no liability for errors or omissions in this document or for the application and use of information in this document. The information herein is subject to change without notice.