Advanced Specialty Gas Equipment

AG3900 Regulator AG3840, AG3900 Series
High Delivery Pressure Regulators

These single-stage, piston sensed, pressure regulators are designed for applications requiring very high delivery pressures (up to 2500 psig). Constructed of either brass or stainless steel, they are available in both cylinder and line configurations.

These regulators are commonly used in high pressure sampling systems, calibration systems, aircraft service and test stand equipment.

Standard Features
  • High Delivery Pressures up to 2500 psig.
  • Piston Sensor Design ensures safe reliable service.
  • Filter traps foreign matter, extends regulator life and reduces maintenance.
  • Diaphragm Seal Outlet Valve provides for on/off flow control (cylinder regulators only).
  • 1/16" NPTF Bonnet Vent Port allows bonnet to be connected to a vent line or disposal system as a precaution in the unlikely event of a diaphragm failure
Optional Features
  • Mounting Ring permits regulator to be panel mounted
  • Captured Venting Configuration provides 1/16" NPTF vent port and stem packing allowing for complete capturing of bonnet when connected to a vent line or disposal system.
Maximum Inlet Pressure: 3000 psig

Inlet Pressure Gauge (dual scale):
   Cylinder Regulators: 0–4000 psig / 0–275 bar
   Line Regulators: None

Delivery Pressure Range

Delivery Pressure Gauge

Filter: 40 micron

Gauge Size: 2" Dial

Operating Temperature Range: -15°F to 140°F

Flow Coefficient:
   Regulator: Cv = 0.06
   Outlet Valve: Cv = 0.17

Inlet Connections:
   Cylinder Regulators:
     AG3840: CGA 320, 326, 346, 350, 540, 580, or
       590 as ordered
     AG3900: CGA 290, 320, 326, 346, 350, 540, 580,
     or 590 as ordered

Line Regulators: 1/4" NPT female

Outlet Connection: 1/4" NPT female

Approximate Weight: 3 lbs.

Materials of Construction
Body and Outlet Valve:
   AG3840: Brass Bar Stock
  AG3900: Type 316 SS Bar Stock
   AG3840: Brass
   AG3900: Type 316 SS
   AG3840: Brass Bar Stock
  AG3900: 300 Series SS
Other Metal Parts Exposed to Gas:
   AG3840: Brass and Stn. Stl.
   AG3900: Type 316 Stn. Stl.
Seat: PTFE
Seals: Viton® and PTFE
Outlet Valve:
   Seat: PCTFE
   Diaphragm: Type 316 Stainless Steel

Table I, AG3840 Series (Brass)

    Delivery Pressure
Part No. Type   Range
Gauge (dual scale)
(psig)           (bar)
AG3840-(CGA) Cylinder   50–800 0–1000 0–69
AG3841-(CGA) Cylinder   100–1500 0–2000 0–138
AG3842-(CGA) Cylinder   200–2500 0–3000 0–207
AG3843 Line   50–800 0–1000 0–69
AG3844 Line   100–1500 0–2000 0–138
AG3845 Line   200–2500 0–3000 0–207

Table II, AG3900 Series (Stainless Steel)

    Delivery Pressure
Part No. Type   Range
Gauge (dual scale)
(psig)           (bar)
AG3900-(CGA) Cylinder   50–800 0–1000 0–69
AG3901-(CGA) Cylinder   100–1500 0–2000 0–138
AG3902-(CGA) Cylinder   200–2500 0–3000 0–207
AG3903 Line   50–800 0–1000 0–69
AG3904 Line   100–1500 0–2000 0–138
AG3905 Line   200–2500 0–3000 0–207
Where "(CGA)" is indicated above, insert appropriate Compressed Gas Association connection number to complete the part number. Example: AG3840­580 or AG3900­580. Order by complete part number.

Optional Equipment

Equipment Part No.
Panel Mounting Ring* PM3803
Safety Mounting Brackets*  
Captured Venting Configuration:  
AG3840 Series SG5651
AG3900 Series SG5650
* If selected, these items are not installed on the regulator. They are shipped as separate items.