R-800 Series Miniature Precision Pressure Regulator – 1/8 NPT ports

U.S. Patent No. 5,358,004

The R-800 series regulators offer high performance in a compact size. 1/8-27 NPT ports allow the use of a wide range of fittings for design flexibility.

Twenty turn hysteresis free adjustment allows pressure settings to 1″ WC resolution.

Four adjusting styles allow maximum design flexibility. The non-rising stem is available with an attractive knob, or plain, allowing installation of OEM knobs. Also available is a flush adjusting shaft, for applications where pressure settings are changed less frequently. Factory pre-set “tamperproof” models are also available. (See drawings)
Mounting options include panel mount, through a 9/16″ hole (nut included), and base mount, through 4 holes 0.125″ dia. (See drawings)

Plastic construction – corrosion resistant wetted materials.

High accuracy – Low effect of supply variation on output.

Low cost – Perfect for OEM applications.

Medical Equipment

  • Oxygen Concentrators
  • Ventilator / Respirators
  • Nebulizers

Air Bearings
HVAC Systems
Custom Machinery

Oxygen Clean
Factory Pre-set


R-800 Series
REGULATOR TYPEConstant Bleed, Relieving
WETTED MATERIALSPolysulfone, Buna-N, EPDM, Acetal, Polyurethane, Stainless steel
SUPPLY CONSUMPTION< 9 SCIM (150 cc/min) @ 30 PSI (207 kPa) supply

< 21 SCIM (350 cc/min) @ 100 PSI (689 kPa) supply
MAX SUPPLY150 PSI (1.03 MPa)
TEMPERATURE RANGE40° – 150° F (4° – 66° C)
EFFECT OF SUPPLY VARIATION< 0.05 PSI (0.35 KPa) per 10 PSI (68.9 kPa) supply change when dead-ended
REPEATABILITY< +/- 0.1 PSI (0.69 kPa) when supply is removed and re-applied
SENSITIVITY1″ H2O (0.25 kPa)
MAXIMUM FLOW2.5 cu.ft./min. (70 LPM)
RELIEF CAPACITY0.5 cu.ft./min. (14 LPM) with outlet 5 PSI (34.5 kPa) above set-point
R-810 Series
REGULATOR TYPENon-bleed, non-relieving

Note: R-810 series regulators are not recommended for dead-end, no flow applications. A downstream relief of 5 cc/min is recommended.

REPEATABILITY< +/- 0.25 PSI (1.72 kPa) when supply is removed and re-applied
MAXIMUM FLOW1.0 cu.ft./min. (28 LPM)
EFFECT OF SUPPLY VARIATION< 0.1 PSI (0.69 kPa) Per 5 PSI (34.5 kPa) supply change
All other specifications remain the same as the R-800 Series
R-820 Series
REGULATOR TYPENon-bleed, relieving
SUPPLY CONSUMPTION (see note)< 0.3 SCIM (5 cc/min.)
REPEATABILITY< +/- 0.25 PSI (1.72 kPa) when supply is removed and re-applied
EFFECT OF SUPPLY VARIATION< 0.1 PSI (0.69 kPa) per 5 PSI (34.5 kPa) supply change
All other specifications remain the same as the R-800 Series

Note: R-820 series regulators have “near zero” bleed to atmosphere under normal operating conditions. Should any overshoot, or downstream pressure increases occur, the unit will relieve only what is necessary to stabilize the pressure setting.
Important: Proper filtration is a must to maintain correct operation of the R-820 Series. Airtrol Components Inc. cannot guarantee perfect “non-bleed” operation under any circumstances. Consult with an Airtrol Application Engineer for more information.

Ordering Information

R-800 Ordering Information