Advanced Specialty Gas Equipment

AG3850, AG3910 Series
AG3850 Regulator High Inlet Pressure, High Delivery Pressure Regulators

These single-stage, piston sensed, pressure regulators are designed for use with inlet pressures up to 5000 psig; such as required for use on 3500 psig (3K) and 4500 psig (HC-500) cylinders. 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: 5000 psig

Inlet Pressure Gauge:
   Cylinder Regulators: 0–5000 psig
   Line Regulators: None

Delivery Pressure Range

Delivery Pressure Gauge

Filter: 40 micron

Gauge Size: 2" Dial

Operating Temp. Range: -15°F to 140°F

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

Inlet Connections:
  Cylinder Regulators: CGA 347, 350, 580, 680 or
     695 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:
   AG3850: Brass Bar Stock
   AG3910: Type 316 SS Bar Stock
   AG3850: Brass
   AG3910: Type 316 SS
   AG3850: Brass Bar Stock
  AG3910: 300 Series SS
Other Metal Parts Exposed to Gas:
   AG3850: Brass and Stn. Stl.
   AG3910: Type 316 Stn. Stl.
Seat: PTFE
Seals: Viton® and PTFE
Outlet Valve:
   Seat: PCTFE
   Diaphragm: Type 316 Stn. Stl.

Table I, AG3850 Series (Brass)

    Delivery Pressure
Part No. Type   Range
Gauge (dual scale)
(psig)               (bar)
AG3850-(CGA) Cylinder   50–800 0–1000 0–69
AG3851-(CGA) Cylinder   100–1500 0–2000 0–138
AG3852-(CGA) Cylinder   200–2500 0–3000 0–207
AG3853 Line   50–800 0–1000 0–69
AG3854 Line   100–1500 0–2000 0–138
AG3855 Line   200–2500 0–3000 0–207

Table II, AG3910 Series (Stainless Steel)

    Delivery Pressure
Part No. Type   Range
Gauge (dual scale)
(psig)             (bar)
AG3910-(CGA) Cylinder   50–800 0–1000 0–69
AG3911-(CGA) Cylinder   100–1500 0–2000 0–138
AG3912-(CGA) Cylinder   200–2500 0–3000 0–207
AG3913 Line   50–800 0–000 0–69
AG3914 Line   100–1500 0–2000 0–138
AG3915 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: AG3850-347 or AG3910-347. Order by complete part number.

Optional Equipment

Equipment Part No.
Panel Mounting Ring* PM3803
Captured Venting Configuration:  
AG3850 Series SG5651
AG3910 Series SG5650
* If selected, these items are not installed on the regulator. They are shipped as separate items.