General Information

　　The American Meter Series CR4000 pressure regulator is designed for natural gas applications and features a compact, lightweight design for fast, easy installation. Interchangeable springs provide a wide range of outlet pressures and flow rates. Outlet pressures between 3.5" W.C. and 5 PSIG are available. Operating temperature range is -20° F to 150° F (-30° C to 65°C).

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

Features

　　In response to market surveys, the following features were designed into the CR4000 regulator to accommodate customer's needs, as indicated per users survey.

　　Ease of installation.

　　Inline 180° or angled 90°.

　　Excellent relief performance.

　　All aluminum.

　　Low maintenance.

Application

　　The CR4000 features a full capacity internal relief valve with large passages to assure the fast release of gas (See performance graphs on page 3). The standard relief spring setting is 8.0" W.C. above preferred outlet pressure setpoint.

　　Regulator body configurations permit the CR4000 regulator to be supplied in 90° or 180° versions. The vent can be supplied in four different positions as shown on page 3.

　　The CR4000 regulator is designed with an extra large, removable weather and bug-proof stainless steel screened vent to resist freeze-ups and to exclude foreign matter. The vent is threaded 3/4 inch NPT.

Pressure Rating

　　125 PSIG = Maximum recommended inlet pressure for normal service.

　　Maximum recommended pressure may vary with orifice size.

　　175 PSIG = Maximum inlet pressure for abnormal or emergency service, without causing damage to regulator case.

　　5 PSIG = Maximum outlet pressure for normal service.

　　10 PSIG = Maximum outlet pressure which can be contained by pressure carrying components (no flange leakage to atmosphere except for normal relief action).

　　If regulator is subjected to these conditions, it should be removed from service.

　　50 PSIG = Maximum outlet pressure for abnormal service without damage to internal components.

　　If regulator is subjected to these conditions, it should be removed from service.

Construction

　　Lower Diaphragm Case - Precision die cast aluminum with a exclusive 7-step advanced conversion coating, single coat polyester primer and High Solid Polyurethane Top Coat.

　　Top Assembly - Precision die cast aluminum with a exclusive 7-step advanced conversion coating, single coat polyester primer and High Solid Polyurethane Top Coat.

　　Pressure Spring - Steel, Zinc plated and yellow chromate treated. Color coded for identification.

　　Diaphragm Plate - Steel, plated

　　Seat Disc - Buna-N.

　　Orifice - High strength, corrosion-resistant, aluminum.

　　Lever - Stamped aluminum.

　　Vent Screen - Stainless steel.

　　Seal Plug - Ultraviolet stabilized, mineral filled nylon.

　　Exclusive, 7 - Step Corrosion Protection

　　The protective finish on the CR4000 regulator more effectively resists corrosive effects of weather and harsh environments than do any others in the industry. Each precision die cast aluminum regulator is treated, inside and out, with a special conversion coating that is part of an exclusive, 7-step finishing process. This unique coating greatly inhibits oxidation of the metal surface. It also prevents finish paint from cracking and blistering.

　　A single coat polyester primer, followed by a high solid polyurethane top coat provides a long-lasting protection to all exterior regulator surfaces. The American Meter conversion coating process meets all environmental protection regulations.