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299H Series Pressure Reducing Regulator

299H Series Pressure Reducing Regulator
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299H Series Pressure Reducing Regulator - 1

Bulletin 71.2:299H September 2012 299H Series Pressure Reducing Regulators • Inlet Pressure up to 175 psig / 12.1 bar • ±1% Accuracy for Fixed Factor Billing (PFM) • Rugged Construction • Compact • Easy to Maintain • Integral Pilot W7513 Figure 1. 299H Series Pressure Reducing Regulators • Optional Slam-Shut Configuration • No Bleed Monitor • High Capacity • Robust • Outlet Pressures up to 60 psig / 4.1 bar • Optional Token Relief www.fisherregulators.com D102683X012 • External, Internal, or Dual Registration

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299H Series Pressure Reducing Regulator - 2

Bulletin 71.2:299H Specifications Specifications for 299H Series constructions are given below. Some specifications for a given regulator as it originally comes from the factory are stamped on a nameplate located on the actuator upper casing. Available Constructions Type 299H: Pilot-operated pressure reducing regulator with a pilot integrally mounted to the actuator casing. Type 299HR: A Type 299H with a token internal relief valve to relieve minor overpressure caused by thermal expansion. Type 299HS: Same as the Type 299H with a Type VSX-2 slam-shut valve which provides overpressure or...

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299H Series Pressure Reducing Regulator - 3

Bulletin 71.2:299H 3/4 NPT CONTROL LINE W7527-1 W7528-1 TYPE 299H WITH EXTERNAL REGISTRATION TYPE 299HR PILOT WITH OPTIONAL TOKEN RELIEF Figure 2. 299H Series Sectional Views Features • Compact in Size—Small envelope because of the built-in pilot and internal registration. • Unique No Bleed Monitor System—Flexible worker/monitor system setup that allows for bleed to be piped to the intermediate piping thus eliminating downstream bleed which reduces lost and unaccounted for gas. Another advantage of this configuration is that the system lockup pressure is that of the worker instead of the...

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299H Series Pressure Reducing Regulator - 4

Bulletin 71.2:299H Introduction Principle of Operation Description Letter keys in this section refer to Figure 3 unless otherwise noted. Fast response and accuracy are made possible by the amplifying effect of the pilot and by the two-path control system. The function of the pilot is to sense change in the controlled outlet pressure and amplify it into a larger change in the loading pressure. Any changes in outlet pressure act quickly on both the actuator diaphragm and the loading pilot, thus providing the precise pressure control and fast speed of response that is characteristic of a...

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299H Series Pressure Reducing Regulator - 5

Bulletin 71.2:299H B J OUTLET E H INLET 3/4 NPT CONTROL LINE CONNECTION K PILOT SUPPLY SCREEN G A C F A7268_1 TYPE 299H WITH INTERNAL REGISTRATION J 3/4 NPT DOWNSTREAM CONTROL LINE CONNECTION J 3/4 NPT DOWNSTREAM CONTROL LINE CONNECTION G A7269 EXTERNAL REGISTRATION A7270 G DUAL REGISTRATION INLET PRESSURE OUTLET PRESSURE ATMOSPHERIC PRESSURE LOADING PRESSURE Figure 3. Type 299H Operational Schematic A7272 A7271 TOKEN RELIEF CLOSED TOKEN RELIEF OPEN Figure 4. Type 299HR Operational Schematic 5

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299H Series Pressure Reducing Regulator - 6

HS Type 299HS Bulletin 71.2:299H July 2008 Type 299HS TERNAL REGISTRATION EXTERNAL REGISTRATION EXTERNAL REGISTRATION INTERNAL REGISTRATION TERNAL REGISTRATION E0072 E0072 INLET PRESSURE OUTLET PRESSURE ATMOSPHERIC PRESSURE LOADING PRESSURE E0072 URE SURE C PRESSURE SSURE INTERNAL REGISTRATION INLET PRESSURE OUTLET PRESSURE ATMOSPHERIC PRESSURE LOADING PRESSURE Figure 5. Type 299HS Operational Schematic Type 299H In operation, assume the outlet pressure is less than the setting of pilot control spring (A). The top side of pilot diaphragm assembly (F) will have a lower pressure than the...

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299H Series Pressure Reducing Regulator - 7

Table 1. Body Sizes and End Connection Styles Table 2. Outlet Pressure Ranges Refer to Figure 5. The Type VSX-2 slam-shut device on the Type 299HS regulator is a fast acting slam-shut valve which provides overpressure or overpressure and underpressure protection by completely shutting off the flow of gas to the downstream system. The slam-shut module's actions are independent of the Type 299HS main regulator and of variations to the inlet pressure. The Type VSX-2 has internal or external registration. External registration requires a downstream sensing line. The slam-shut disk is held in...

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299H Series Pressure Reducing Regulator - 8

OPTIONAL PILOT SUPPLY FILTER OR FILTERED PILOT ' SUPPLY REGULATOR OPTIONAL PILOT SUPPLY REGULATOR OPTIONAL PILOT OPTIONAL PILOT SUPPLY FILTER OR FILTERED PILOT SUPPLY REGULATOR NOTE: IF USED, THE PILOT SUPPLY REGULATOR SHOULD BE SET TO 3 psig / 0.21 bar ABOVE THE MONITOR OUTLET PRESSURE SETTING. NOTE: IF USED, THE PILOT SUPPLY REGULATOR SHOULD BE SET TO 3 psig / 0.21 bar ABOVE THE MONITOR OUTLET PRESSURE SETTING. WIDE-OPEN DOWNSTREAM MONITOR WIDE-OPEN UPSTREAM MONITOR .OPTIONAL PILOT SUPPLY REGULATOR OPTIONAL PILOT SUPPLY FILTER OR FILTERED PILOT SUPPLY REGULATOR OPTIONAL PILOT FILTERED...

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299H Series Pressure Reducing Regulator - 9

Table 3. Flow Coefficients Table 4. Type VSX-2 High and Low Trip Pressure Ranges

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299H Series Pressure Reducing Regulator - 10

Bulletin 71.2:299H Wide-Open Monitor The control line of the upstream regulator is connected downstream of the second regulator (Figure 6), so that during normal operation the monitoring regulator is standing wide open with the reduction to distribution pressure being taken across the working regulator. Only in case of open failure of the working regulator does the wide-open monitoring regulator take control at its slightly higher setting. A pressure build-up above the monitor set pressure is required for the monitor to take control in the event of an overpressure situation. Installing a...

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