Matheson Model 3511ANL Single Stage High Purity SS Regulator, CGA-540, Delivery Pressure Range 0-15 PSIG, SEQ3511ANL540

This is a Matheson Single Stage 316 Stainless Steel regulator with a 1/4 in compression tube outlet connection and 1/4 in FNPT body porting. It comes equipped with 2 inch inlet and delivery pressure gauges, an outlet diaphragm valve, metal to metal seals, chrome plated brass bonnet, and a Teflon seat.

This Matheson series 3510A, model 3511ANL regulator is to be used in applications requiring delivery pressures up to 15 PSIG and can accept a maximum inlet pressure of 3000 PSIG. This regulator is suitable for a variety chromatography applications requiring the supply of carrier gas/detector support gas. This regulator is suitable for any application requiring the supply of non-corrosive gases and some applications requiring the supply of semi-corrosive gases. This no lube model is assembled without the use of PCTFE. This allows the regulator to be used in applications where method detection limits are sub-particles per million.

Gas Chromatography Detectors which can use the 3511ANL Regulator:

• Electrolytic Conductivity Detector (ELCD or Hall Detector)
• Electron Capture Detector (ECD)
• Mass Selective Detector (MSD or MS)
• Atomic Emission Detector (AED)

Single-Stage vs. Two-Stage

Both single-stage and two-stage regulators operate by reducing the pressure of gas supplied by a cylinder to an appropriate output level. The intake and delivery pressure ranges of regulators do not depend on how many stages they have, but by each regulators mechanical characteristics. When considering a single vs. a two-stage regulator there are two things to keep in mind: Droop and Supply Pressure Effect. Droop is the decrease in output pressure caused by an increase in flow rate. Supply Pressure Effect is simply the variation in delivery pressure from the cylinder to the regulator.

Single Stage regulators will experience less droop with varying flow rates but a large supply pressure effect and need to be monitored and adjusted by an operator or used in applications where supply pressure will remain constant. Two-Stage regulators inherently control for variations in supply pressure while producing a constant output and therefore can be used without an operator present and in applications which require a very specific delivery pressure. The specification sheet for this series of regulator can be found in the downloadable section as a .PDF.