Bulletin 71.1:CSB400 December 2012 CSB400 Series Commercial / Industrial Pressure Reducing Regulators P1424 CSB400 SERIES PRESSURE REDUCING REGULATOR P1426 TYPICAL TYPE CSB403 REGULATOR WITH INTEGRAL TRUE-MONITOR™ REGULATOR P1425 TYPICAL TYPE CSB404 REGULATOR WITH INTEGRAL TYPE VSX4 SLAM-SHUT MODULE Figure 1. Typical CSB400 Pressure Reducing Regulator Introduction • Integral True-Monitor—Regulator and Monitor in One Unit. • Slam-shut • Ductile Cast Iron and WCC Steel Bodies Available • Wide Variety of Body Sizes and End Connections • No Special Tools for Pressure Adjustment and Orifice Removal The CSB400 Series direct-operated, spring-loaded regulators have been engineered to fit a multitude of pressure-reducing applications including commercial and industrial installations. This flexibility is provided by the numerous body sizes and end connections, outlet pressure settings, as well as the option for internal, external, or dual pressure registration. In addition to application flexibility, the CSB400 Series offers multiple overpressure protection options to meet your demands on application requirements. www.fisherregulators.com D103137X012 Features and Benefits

Bulletin 71.1:CSB400 UPPER CASE STABILIZER GUIDE REGULATOR CONTROL SPRING HIGH TRIP SPRING LOW TRIP SPRING VENT VALVE STEM ORIFICE DIAPHRAGM HEAD PROXIMITY SWITCH PLUG BALANCED PORT ASSEMBLY CAM RESET BUTTON BODY LEVER TOKEN RELIEF SPRING EXTERNAL CONTROL LINE OR PRESSURE RETAINING PLUG DIAPHRAGM P1004 STABILIZER Figure 2. Type CSB404 Regulator with Type VSX4 Slam-shut Internal View Multiple Overpressure Protection Options Available: • Token Internal Relief - provides relief from minor overpressure caused by nicks or dents on the orifice or by thermal expansion of gas in the downstream line....

Available Configurations Body Sizes, Materials, End Connections, and Emergency Casing: 4.0 bar / 58 psig To Avoid Internal Parts Damage: 0.35 bar / 5.0 psig above outlet pressure setting 17 mbar to 3.0 bar / 6.8 inches w.c. to 43.5 psig Flow Capacities Orifice Size Non-PED with Standard Construction: Non-PED with Standard Construction: Spring Case Vent Connection Spring Case Vent and Body Orientation TM600 Series True-Monitor™ Performance Inlet Pressure Ratings Maximum Operating: Up to 8.62 bar / up to 125 psig Maximum Emergency: 12.1 bar /175 psig Outlet Pressure Ranges: 27 mbar to 0.52 bar/...

Table 1. Available Configurations Table 2. Body Sizes, Material, End Connections, and Pressure Ratings

Figure 3. CSB400 Series with External Registration and Token Relief Operational Schematic Table 3. Integral Strength (IS) Pressure Ratings (Applicable only to applications where inlet rating cannot exceed outlet rating) Table 4. Differential Strength (DS) Pressure Ratings and Flow and Sizing Coefficients

Figure 4. CSB400 Series with Internal Registration and Token Relief Operational Schematic Table 5. CSB400 Series Primary Regulator Outlet Pressure Ranges Refer to Figures 4 and 5. When downstream demand decreases, the pressure under the diaphragm increases. This pressure overcomes the regulator setting (which is set by a spring). Through the action of the pusher post assembly, lever, and valve stem, the balanced port assembly moves closer to the orifice and reduces gas flow. If demand downstream increases, pressure under the diaphragm decreases. Spring force pushes the pusher post assembly downward...

Bulletin 71.1:CSB400 Pressure Registration and Downstream Control Line Connection Internal Registration CSB400 Series regulators with an “IT” or “IN” in the type number have internal pressure registration. Internal registration utilizes an internal sense tube located in the outlet of the body to communicate the outlet pressure to the actuator chamber. Internal registration is used for ease of installation. Response time of the regulator is not as quick as dual registration due to internal sense only having one sensing port feeding the actuator chamber. Dual Registration CSB400 Series regulators...

Type CSB403 Bulletin 71.1:CSB400 May 2008 Type CSB403IT Regulator with Token Relief and Monitor REGULATOR ADJUSTING SCREW MONITOR ADJUSTING SCREW REGULATOR ORIFICE REGULATOR CONTROL SPRING MONITOR CONTROL SPRING TOKEN RELIEF SPRING MONITOR DISK MONITOR LEVER REGULATOR VALVE STEM MONITOR ORIFICE MONITOR OPENING SPRING BALANCED PORT ASSEMBLY WIDE-OPEN INTEGRAL MONITOR REGULATOR M1098 PRESSURE RETAINING PLUG (DO NOT REMOVE WHILE UNIT REGULATOR IS PRESSURIZED) LEVER REGULATOR PUSHER POST PRIMARY REGULATOR INLET PRESSURE OUTLET PRESSURE ATMOSPHERIC PRESSURE INLET PRESSURE INLET PRESSURE MXXXX EXTERNAL...

Bulletin 71.1:CSB400 OPSO ADJUSTING SCREW UPSO ADJUSTING SCREW OPSO SET SPRING REGULATOR ADJUSTING SCREW UPSO SPRING REGULATOR CONTROL SPRING SLAM-SHUT ORIFICE VENT TOKEN RELIEF SPRING SCREW PROXIMITY SWITCH PLUG RESET KNOB SLAM-SHUT DISK VALVE STEM LEVER REGULATOR ORIFICE TYPE VSX4 SLAM-SHUT MODULE M1146 EXTERNAL CONTROL LINE (SENSE LINE) PRIMARY REGULATOR INLET PRESSURE INLET PRESSURE OUTLET PRESSURE OUTLET PRESSURE M1146 ATMOSPHERIC PRESSURE ATMOSPHERIC PRESSURE Figure 6. Type CSB404ET Externally Registered Regulator and Slam-Shut Operational Schematic a backup orifice device, which seals...

Bulletin 71.1:CSB400 OPSO ADJUSTING SCREW UPSO ADJUSTING SCREW OPSO SET SPRING REGULATOR ADJUSTING SCREW UPSO SPRING REGULATOR CONTROL SPRING VENT SLAM-SHUT ORIFICE TOKEN RELIEF SPRING PROXIMITY SWITCH PLUG RESET KNOB SLAM-SHUT DISK LEVER REGULATOR ORIFICE TYPE VSX4 SLAM-SHUT MODULE M1148 PRESSURE RETAINING PLUG (DO NOT REMOVE WHILE UNIT IS PRESSURIZED) VALVE STEM PRIMARY REGULATOR INLET PRESSURE INLET PRESSURE OUTLET PRESSURE OUTLET PRESSURE ATMOSPHERIC PRESSURE ATMOSPHERIC PRESSURE Figure 7. Type CSB404IT Internally Registered Regulator with Externally Registered Slam-Shut Operational Schematic...

Table 8. Regulator and Slam-shut OPSO and UPSO Pressure Ranges Example: If a non-standard setpoint is needed, see the following example for instruction in using Table 8. Non-standard setpoint = 140 mbar/2 psig, then the factory set of the token relief will be 1.3*140 = 182 mbar/ 2.6 psig. The factory OPSO and UPSO set values will be 165% of set and 50% of set, respectively, resulting is values of 231 mbar / 3.4 psig and 70 mbar /1 psig, also respective to OPSO and UPSO.