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Miniature Pressure Regulators for Corrosive Media

0 to 5 psig


Item# AR91-005

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-24 $64.86
25-49 $61.62
50-99 $60.32
100-199 $57.73
200+ $56.43

In stock

Lead Time (If not in stock): 3 weeks
0 to 5 psig AR91-005 AR91-005
  • Designed for Applications with Limited Space and for Low Flow or Dead-End Service
  • Small Package Size and Lightweight Construction
  • Corrosion Resistant Anodized Aluminum Exterior
  • Excellent Stability and Repeatability

AR91-005 Model Options

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Pressure Range
Pressure Port Size
Pressure Port Type
Maximum Inlet Pressure
Media Type
Warning WARNING: This product can expose you to 1,3 - Butadiene, a chemical known to the State of California to cause Cancer or birth defects or other reproductive harm. For more information go to

  • Capsule and Adjusted Screw Material Plated Steel
  • Body Material Anodized Aluminum
  • Diaphragm Material Fluorocarbon with Polyester Fabric
  • Flow Capacity 2.5 SCFM (71 LPM) typical
  • Form Factor Pipe or Panel
  • Maximum Supply Pressure 250 psig (17.2 bar)
  • Total Air Consumption 3 SCFH (84.6 LPM)
The AR90 Series miniature pressure regulator is a compact, low cost unit which operates in pressure ranges up to 100 psi, with a maximum supply pressure of 250 psi. It provides reliability and accuracy for low flow and dead end applications, but is not designed for critical flow applications. The unit is designed with a corrosion resistant anodized aluminum body with a standard fluorocarbon diaphragm.

Supply Pressure Effect: <0.25 psig (17.02 mbar)
Exhaust Capacity (@5 psi > Setpoint): 0.1 to 0.3 SCFM (2.8 to 8.5 LPM) typical
Max. Supply Pressure: 250 psig (17.2 bar)
Flow Capacity: 2.5 SCFM (71 LPM) typical
Total Air Consumption:3 SCFH (84.6 LPM) typical
Port Size: 1/16-27 NPT or 5 mm metric thread
Materials of Construction:
  Body: Anodized Aluminum
  Adjusting Screw: Plated Steel
  Trim: Brass, Acetal
  Diaphragm: Fluorocarbon with Polyester Fabric
  Knob: Acetal Resin
  Spring: Music Wire
Dimensions: 22.2 x 22.2 x 84.6 mm (0.875 x 0.875 x 3.33')
Weight: 0.06 kg (2.2 oz)
Mounting Options: Pipe or Panel
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Rated 5 out of 5 by from low pressure relieve valve - adjustable Nice unit. works well in our application. great delivery service.
Date published: 2016-11-05
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What is the accuracy?

Asked by: Wolfdog
Accuracy is pretty hard to define in a manually adjustable regulator. I suspect the Type 91&rsquo;s is around 4%, while the Type 92&rsquo;s is about 3.5%.
Answered by: Raouf Belkheyar
Date published: 2020-08-31

Can this be used in a water regulation application? I need to regulate a small amount of water flow to 1-4psi 5psi max.

Asked by: Buddy
These regulators are design for use with AIR only. They regulator pressure by bleeding off excess pressure. Water would be spraying out of the bleed port on the regulator.
Answered by: Applicatrions Engineer JK
Date published: 2020-08-27

Is this product CE compliant?

Asked by: toni
Thank you for your question? This part is a manual product. No CE approvals available Hope this was helpful
Answered by: application engineer je
Date published: 2020-03-06
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