High-purity regulators designed for analytical applications using non-corrosive or semi-corrosive gases.

Applications

• Supply of carrier gas/detector support gas for a variety of gas chromatography applications (see table below for details).
• Supply of calibration standards to on-line process analyzers, emission monitoring systems, etc.
• Supply of high-purity non-corrosive or semi-corrosive gases to applications requiring constant delivery pressure.

MATHESON strongly recommends the use of a cross-purge with any regulator put into highly corrosive or toxic gas service. You can easily add a cross-purge to this model regulator by selecting "Yes" for the Cross Purge option above.

Design Features

• High-purity 316L stainless steel barstock body
• High-purity 316L stainless steel diaphragm
• Metal to metal seals minimize diffusion of contaminants
• 2” inlet and delivery pressure gauges
• Bonnet ported and threaded to pipe gases away from work area
• Equipped with outlet diaphragm valve
• 1/4” compression tube outlet connection
• 10 micron metal filter protects seat from contamination
• Optional interstage relief valve available
• Panel mountable, front and back bonnet threaded
• Bonnet vent hole size: 1/8” NPTF

*Note: where CGA is replaced by the actual CGA number. Some CGA limitations may apply. (NI) for 1/4" FNPT inlet

Materials of Construction

• Gauges: 316 stainless steel
• Body: 316L stainless steel
• Bonnets: Chrome plated brass barstock
• Diaphragms: 316L stainless steel
• Seats:
          1st Stage – Teflon
          2nd Stage – Teflon
• Seals: Metal to metal
• Valve Body (4370 Series): 316L stainless steel
• Valve Diaphragm: 316L stainless steel
• Valve Seat: PCTFE

Specifications

• Maximum Inlet Pressure: 3000 psi (20,700 kPa)
• Typical Max Flow Rate (100 psi del press): 7 SCFM-N2 (200 SLPM)
• Flow Capacity (Cv): 0.06
• Interstage Pressure
          Model 3811A: ~350 psi
          Model 3813A: ~350 psi
          Model 3810A: ~350 psi
          Model 3816A: ~350 psi
          Model 3818A: ~560 psi
• Operating Temperature: -40°F to 140°F (-40°C to 60°C)
• Porting (Regulator Body): 1/4” NPT Female
• Porting Configuration: 2 High, 3 Low, l Interstage

Options

No Lube
A small amount of polychlorotrifluoroethylene is added to the threads to facilitate assembly. For ECD, MS or AED applications where method detection limits are sub-ppm, it is recommended to use a No Lube (-NL) model.

Cross Purge
• Eliminates the escape of hazardous gases when changing cylinders
• Reduces danger of contamination from atmospheric moisture and oxygen
• Minimizes the amount of gas lost during cylinder changes
• 4360 Series Quarter-Turn Diaphragm Valves used throughout
• All stainless steel construction (4774 Series Cross Purge)

Interstage Relief Valve
An interstage relief valve is sometimes required to protect the 2nd stage of a dual stage regulator from over pressurizing. If the pressure regulator is used for toxic, corrosive or flammable gases, then the relief valve exhaust should be captured and vented to a safe location.

	Mounting Options
	Mounting Bracket for Dual-Stage Regulators PMK-2N Mounting Nuts are also needed (see below). The rear bonnet of the regulator mounts to this bracket.
	PMK-2N Mounting Nuts These nuts can be used either with the above bracket or for mounting in a panel.
	54 Series Protocol Station This stainless steel manifold is designed to provide a safe, reliable way of wall-mounting a cylinder regulator. Manifolds are provided a durable stainless steel bracket, stainless steel flex hose (3 ft std.), and a CGA connection with integral check valve.

Flow Curves

Flow Curves, 3120A/3810A Series

Instructions

Instructions, General Regulator