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S200 series

S200 series
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Bulletin 71.1:S200 September 2012 S200 Series Pressure Reducing Regulators • Wide Variety of Body Materials and End Connections Styles Available • Fixed Factor / PFM Accuracy Typical S200 Series Regulator • On / Off Fast Acting Loads • Commercial / Industrial Service S200 Series Regulator with True-Monitor™ • Optional Internal Relief • Optional True-Monitor • Optional Integral Slam-Shut Device D100133X012 S200 Series Regulator with Integral Slam-Shut Device www.fisherregulators.com

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Bulletin 71.1:S200 Introduction The quick-reacting S200 Series pressure reducing service regulator is typically used in an industrial or commercial installation to minimize the shock effect of sudden downstream load changes that might otherwise activate safety shutoff equipment. In such an installation, where gas consumption varies from almost nothing to several thousand standard cubic feet per hour (scfh) (or normal cubic meters per hour (Nm3/h)), snap-acting solenoid valves can cause sudden load changes. The resulting shock pressures and regulator instability can cause safety equipment to...

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Bulletin 71.1:S200 • Application Flexibility—A wide variety of sizes, body materials and end connection styles available: NPS 1-1/4, 1-1/2, and 2 / DN 32, 40, and 50 body sizes available in ductile iron, steel, and cost effective cast iron available with NPT, BSP, CL125 FF (available with 7.5-inch or 10-inch / 191 or 254 mm face-to-face dimensions), CL150 RF, CL250 RF, CL300 RF, and PN 10-16 end connections. (Not all sizes and/or materials are available with all end connections. See Tables 1 and 2 for available configurations.) • Integral Slam-Shut Device—The S200 Series can be...

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Bulletin 71.1:S200 Specifications Available Constructions (See Table 1) S201: Basic construction without internal relief Type for 2 to 30-inches w.c. / 5 to 75 mbar outlet pressures Type S201H: Type S201 with a heavy diaphragm plate for 1 to 5 psig / 0.07 to 0.35 bar outlet pressures S201K: Type S201 with a heavy diaphragm Type plate for 2 to 10 psig / 0.14 to 0.69 bar outlet pressures S201P: Type S201 with downstream control Type line connection and O-ring stem seal for external pressure registration S201PK: Combination of Types S201K Type and S201P S202, S202H, and S202P: Types S201,...

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Table 1. Available Constructions Table 2. Body Sizes and End Connection Styles Table 3. Outlet Pressure Ranges

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Table 4. Additional Specifications Construction Features Heavy-Duty Construction for Higher Outlet Pressures An S200 Series regulator with an H or K (Figure 3) in the type number can deliver air or gas at a higher outlet pressure setting than the basic Type S201 (see Table 3). S200 Series regulators with an H or K in the type number have a heavy diaphragm plate, while most other S200 Series regulators have a light diaphragm plate. However, a regulator with a P in the type number will have a light diaphragm plate for outlet pressure ranges under 1 psig / 0.07 bar and a heavy diaphragm plate...

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Bulletin 71.1:S200 Heavy Diaphragm Plate inlet pressure outlet pressure atmospheric pressure Figure 3. Type S201PK Regulator with Heavy Diaphragm Plate for Higher Outlet Pressures Blocked Throat inlet pressure External Control Line Connection outlet pressure atmospheric pressure Figure 4. Type S201P Regulator with Downstream Control Line Connection 7

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Bulletin 71.1:S200 Internal Relief Several S200 Series regulators have relief across the diaphragm (Figure 5) to help minimize overpressure. Any outlet pressure above the start-to-discharge point of the nonadjustable relief spring moves the diaphragm off the relief seat, allowing excess pressure to bleed out through the screened stabilizer vent. For extra protection, should emergency conditions exist which prevent normal operation of the regulator (for example, linkage becoming disconnected or disk broken off), the relief stem contacts the underside of the closing cap, limiting the rise of...

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INLET PRESSURE, psig TYPE S202 OR S206 REGULATOR WITH SEAT BLOCKED OPEN BY TWO 1/8-INCH / 3.2 mm DIAMETER WIRES INLET PRESSURE, psig TYPE S202H REGULATOR WITH SEAT BLOCKED OPEN BY ONE 1/8-INCH / 3.2 mm DIAMETER WIRE Figure 6. Internal Relief Performance for Types S202, S202H, and S206 Regulators Venting Directly to Atmosphere Type VSX-2 Slam-Shut Device The Type VSX-2 slam-shut device on the Types S208 and S209 regulators is a fast acting shutoff valve which provides overpressure (OPSO) or over and underpressure (UPSO) protection by completely shutting off the flow of gas to the downstream...

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Bulletin 71.1:S200 Monitor Sensing Tube Double Knife Edge Orifice Internal Token Relief open Throat Set Spring Monitor Sensing Diaphragm (set slightly above main valve setpoint) inlet pressure True-Monitor™ Throttles Independently from the main regulator outlet pressure atmospheric pressure Figure 7. Type S203 Regulator with True-Monitor the diaphragm will travel upwards (or downwards) operating a lever which in turn releases the ball. Once the ball is released, the spring force on the stem will push the stem and disk against the seat, shutting off all gas flow. The manual reset has an...

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Bulletin 71.1:S200 flow rate, Nm3/h of 0.6 specific gravity natural gas Low outlet pressure shutoff 26.8 53.6 80.4 107 134 160 188 214 3.0 5/8-inch / 16 mm seat ring 40 30 2.0 1/2-inch / 13 mm seat ring 20 1-inch / 25 mm seat ring 10 0 0 1000 2000 3000 1.0 1-3/16-inch / 30 mm seat ring 4000 5000 6000 7000 minimum inlet pressure, bar Internal Relief minimum inlet pressure, psig 50 0 0 8000 flow rate, scfh of 0.6 specific gravity natural gas note: see capacity information for conversion to equivalent capacities of other gases inlet pressure outlet pressure atmospheric pressure Figure 9. Type...

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Figure 11. Type S208 Regulator with Type VSX-2 Slam-Shut Device (right) and Type S209 Regulator with Slam-Shut Device and Internal Token Relief (left) Table 6. Type VSX-2 High and Low Trip Pressure Ranges

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