1800B2 Regulator
The American Meter Series 1800B2 pressure regulators are designed for natural gas applications and feature a compact, lightweight design for fast, easy installation.

Interchangeable orifices and springs provide a wide range of outlet pressures and flow rates. Outlet pressures between 3.5" W.C. and 2 PSIG are available. Operating temperature range is -20°F to 150°F (-30°C to 65°C ). Maximum flow rate is 2500 SCFH ( 70.8 m3 /h).

The diaphragm case may be easily removed for routine inspection without disturbing the line connections. All models conform to ANSI Code B109.4-1998, and CGA Service-Type Regulator Specification CAN/CGA-6.18-M95.

1800B2-HC Regulator
Ideal for light commercial and industrial use, the 1-1/4" 1800B2-HC Series regulator is designed to increase output capacity and lessen compounding during medium to high inlet pressure operations. Compounding usually occurs when a larger valve body introduces undesirable flow characteristics, thereby creating an inefficient, boosting effect in the outlet port of the body.

The 1800B2-HC regulator's lightweight design features high-capacity capabilities for 1-1/4" NPT connections and flow capacities up to 4600 SCFH depending on inlet pressure and orifice selection. It complements the 1800B2 Series family of regulators.

All models conform to ANSI Code B109.4-1998 and CGA Service-Type Regulator Specification CAN/CGA-6.18-M95.

Overpressure Shut-Off Regulators
Models 1843B2, 1843B2-HC, 1853B2, 1883B2, 1883B2-HC and 1893B2 regulators are compact units designed to regulate line pressure and to provide protection against any downstream overpressure.

Models 1813B2, 1833B2, 1843B2 and 1853B2 feature full-capacity internal relief valves with large passages to assure the fast release of gas (see performance graphs on pages 7 and 8). For added protection, a relief valve stop is provided to assure operation under the most severe conditions. The standard relief spring setting is 8" W.C. above the normal 7" W.C. outlet pressure.

Models 1843B2, 1853B2, 1883B2 and 1893B2 are equipped with overpressure shut-off (OPSO) that provides protection against downstream overpressure.

Models 1853B2 and 1893B2 also include an underpressure shut-off (UPSO) that provides protection in the event of an upstream failure. Valve body configuration permits the 1800B2 Series regulators to be supplied in four positions as specified on page 11. All Series 1800B2 regulators are available with either right-angle (90°) or straight-flow (180°) valve bodies. Vents can also be supplied in four different positions.

All models are designed with an extra large, removable weather-proof and bug-proof stainless-steel screened vent to resist freeze-ups and to exclude foreign matter.

The vent is threaded 3/4" or 1" NPT and is also available with BSP-TR threads making it suitable for inside installations. Inside installation requires a vent line of sufficient diameter to carry gas vented by the regulator to a safe outside location away from any opening in the building.

1800B2 Regulator & 1800B2-HC Regulator
Lower Diaphragm Case – Precision die-cast aluminum with an exclusive 7-step advanced conversion coating, single-coat polyester primer and high solid polyurethane top coat.
Top Assembly – Precision die-cast aluminum with an exclusive 7-step advanced conversion coating, singlecoat polyester primer and high solid polyurethane top coat.
Valve Body – Cast grey iron, undercoated, single-coat polyester primer and high solid polyurethane top coat, (Rotates in 90 degree increments).
Pressure Spring – Steel, zinc plated and yellow chromate. Color coded for identification.
Diaphragm Plate – Steel, terne plated.
Seat Disc – Buna-N.
Orifice – Super high strength, corrosion-resistant, aluminum.
Lever – Steel, zinc plated and yellow chromate.
Vent Screen – Stainless steel.
Seal Plug – Ultraviolet stabilized, minlon.

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