P203 Pressure Reducing Regulator Type 1. Flow of 0.6 specific gravity natural gas in SCFH at 60°F and 14.7 PSIA and Nm3/h at 0°C and 1.01325 BAR. The P203 and P203H are available with a true monitor regulator, which acts independently of the main regulator. The monitor provides equivalent overpressure protection when compared to a standard two-regulator monitor setup. If one regulator fails, the other regulator provides control and overpressure protection. Applications • Commercial / Industrial / Service • Gas Engine Control • Gate Applications Features • Integral Monitoring • Fast Acting Minimizing Shock • Internal Relief Materials of Construction

How Does the P203 Series Work? Under normal operational conditions, the P203 Series performs as the P200. When there is a demand downstream of the regulator, the main valve disk moves away from the orifice to allow flow. The Monitor diaphragm and piston are always in motion based on outlet feedback though the pitot tube at the outlet. Secondary or monitor orifice & valve disk Main orifice & valve disk The monitor module will activate when the system experiences a failure such as the main valve disk is stuck open or the lever disengages from the valve stem assembly. When the P203 main regulator...

BelGAS P203 Part Number Selection Before attempting to select a BelGAS P203, several pieces of information should be known: port size, the supply pressure the unit operates at normally, the output pressure the unit operates at normally, the downstream flow requirement during normal operation, the maximum amount of output pressure the unit is allowed to have during an over pressurization situation, and the media the unit will be regulating. Example #1 Known Requirements 1.5 NPT 60 PSIG inlet 9" WC outlet under normal conditions 18,000 SCFH air Should not rise above 1.3 PSIG Port Size The code...

Body Size P203 Regulator Rebuild Kits

P203 Version Normal High Pressure External Pressure Registration Throat Stabilizer Port Size 1.5 NPT 1.5 x 2 NPT 2 NPT Spring Range use with G0 Monitor use with G1 Monitor use with G1 Monitor use with G2, R0, R1, B0 Monitor use with R2, B1, SO Monitor use with B2, S1 Monitor use with S2, S3 Monitor 1.5 - 3.25 PSIG Special Construction None Stem O-Ring Stem Seal O-Ring with Wiper Ring Stem Seal O-Ring with 125FF Stem Seal O-Ring with Wiper Ring with 125FF 125 FF (2” Cast Iron only) Orifice 1/4" 3/8" 1/2" 3/4" 1" 1-3/16" Port Orientation Up (Standard) Down Right Left Bonnet Vent Orientation 12...

P203 Normal (0) Relief Capacities P202 Relief Capacities 80 Relief Flow (SCFM) P203 High (H) Relief Capacities P202H Relief Capacities Relief Flow (SCFM)

P203 Flow Capacities in SCFH (Nm3/h) of 0.6 Specific Gravity Natural Gas Outlet Pressure, Spring Part Number, and Accuracy 4 inches w.c. (10 mbar) 655-697-002 or 655-697-003 1 inch w.c. (2 mbar) droop 2 inches w.c. (5 mbar) boost Orifice Size, Inches (mm) Inlet Pressure 1 inch w.c. (2 mbar) droop 2 inches w.c. (5 mbar) boost 1. Limited due to boost - Shaded areas show where indicated droop would be exceeded regardless of capacity. - Shaded areas show where maximum operating inlet pressure for a given port diameter is exceeded.

P203 Flow Capacities in SCFH (Nm3/h) of 0.6 Specific Gravity Natural Gas Outlet Pressure, Spring Part Number, and Accuracy 4 inches w.c. (10 mbar) 655-697-002 or 655-697-003 1 inch w.c. (2 mbar) droop 2 inches w.c. (5 mbar) boost Inlet Pressure Orifice Size, Inches (mm) 1 inch w.c. (2 mbar) droop 2 inches w.c. (5 mbar) boost 14 inches w.c. (35 mbar) 655-697-005 ± 2 inches w.c. (5 mbar) 1. Limited due to boost - Shaded areas show where indicated droop would be exceeded regardless of capacity. - Shaded areas show where maximum operating inlet pressure for a given port diameter is exceeded. 8

P203 Flow Capacities in SCFH (Nm3/h) of 0.6 Specific Gravity Natural Gas

P203 Flow Capacities in SCFH (Nm3/h) of 0.6 Specific Gravity Natural Gas

P203 H Flow Capacities in SCFH (Nm3/h) of 0.6 Specific Gravity Natural Gas

P203 H Flow Capacities in SCFH (Nm3/h) of 0.6 Specific Gravity Natural Gas

P203 H Flow Capacities in SCFH (Nm3/h) of 0.6 Specific Gravity Natural Gas

P203 H Flow Capacities in SCFH (Nm3/h) of 0.6 Specific Gravity Natural Gas

P203 P Flow Capacities in SCFH (Nm3/h) of 0.6 Specific Gravity Natural Gas Outlet Pressure, Spring Part Number, and Accuracy ± 1 inch w.c. 2 inches mbar Orifice Size, Inches (mm) Inlet Pressure 1. Limited due to boost - Shaded areas show where indicated droop would be exceeded regardless of capacity. - Shaded areas show where maximum operating inlet pressure for a given port diameter is exceeded.

Note: See standard P200 Part Listing for other parts. Parts included in P203 Repair Kit, 971-203-000

Part Number Range Spring - Normal (0) 1 Brown, Plated Steel 1 Black, Plated Steel 1 Dark Green, Plated Steel 1 Range Spring - High (H) Dark Blue, Plated Steel 1 Orange, Plated Steel 1 P203 Monitor Parts Only - See P200 for other Parts 41 Relief Restriction 1 P203 Monitor Parts Only - See P200 for other Parts 49 Cap Screw 8 Monitor Springs Green Spring (See Monitor Data Table) 1 52 Red Spring (See Monitor Data Table) 1 Blue Spring (See Monitor Data Table) 1 Silver Spring (See Monitor Data Table) 1 53 Lower Spring Seat (See Monitor Data Table) 0-3...