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1190 Low Pressure Gas Blanketing Regulator

1190 Low Pressure Gas Blanketing Regulator
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1190 Low Pressure Gas Blanketing Regulator - 1

Type 1190 Low-Pressure Gas Blanketing Regulator Figure 1. Type 1190 Low-Pressure Gas Blanketing Regulator A Type 1190 low-pressure gas blanketing regulator reduces a high-pressure gas, such as Nitrogen, to maintain a protective environment above any liquid stored in a tank or vessel while the liquid is being pumped out. Also, when the vessel cools suddenly causing the vapors inside the vessel to condense, the gas blanketing regulator replaces the condensed vapors with the blanketing gas to prevent the internal vessel pressure from decreasing. In both cases a slight positive vessel pressure prevents outside air, moisture, and other contaminants from entering the vessel and the possible collapse of the vessel walls. • Quick-Change Trim Package—Tested trim packages can be made up and stocked ahead of time for fast replacement. • In-Service Travel Inspection—Standard indicator assembly with protective cover permits periodic inspection of plug travel without removing regulators from service. • Easy In-Line Maintenance—Top-entry design reduces maintenance time and manpower requirements; trim parts can be inspected, cleaned, and replaced without removing the main valve body from the pipeline. • Factory-Piped Pilot Supply—Supply pressure to pilot is supplied from inlet side of the main valve body through tubing furnished with the regulator. The Type 1190 low-pressure gas blanketing regulator is used for extremely accurate pressure control on very low-pressure blanketing systems. The regulator helps to control emissions and provides protection against any contamination from atmospheric conditions by providing a flushing action. The Type 1190 gas blanketing regulator maintains a positive vessel pressure thereby reducing the possibility of vessel wall collapse during pump-out operations.

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1190 Low Pressure Gas Blanketing Regulator - 2

Bulletin 74.1:1190 Specifications Body Sizes(1) See Table 1 Control Line Connection Maximum Main Valve Inlet Pressures(2) 400 psig / 27.6 bar Vent Connection on Pilot Spring Case Maximum Operating Inlet Pressures(2) 200 psig / 13.8 bar with cast iron construction or 300 psig / 20.7 bar with a steel or stainless steel construction Maximum Outlet (Casing) Pressure(2) 75 psig / 5.2 bar Maximum Operating Outlet Pressure to Avoid Internal Part Damage(2) 75 psig / 5.2 bar Outlet Pressure Ranges (Type Y191A Pilot)(2) See Table 2 Main Valve Orifice Diameters and Travels See Table 3 Proportional...

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1190 Low Pressure Gas Blanketing Regulator - 3

Bulletin 74.1:1190 Specifications (continued) Type 95H Supply Pressure Regulator Body, Spring Case, and Diaphragm Casing: Ductile iron (standard) or Stainless steel (optional) Orifice: 303 Stainless steel (standard) or 316 Stainless steel (NACE) Spring: Steel (standard) Diaphragm: Nitrile (NBR) (standard) Fluorocarbon (FKM), or Nitrile (NBR) with Polytetrafluoroethylene (PTFE) diaphragm protector (optional) O-Rings, Gaskets, and Seals: Nitrile (NBR) (standard), Fluorocarbon (FKM), Perfluoroelastomer (FFKM), or Ethylenepropylene (EPDM) (optional) Disk: Nitrile (NBR) (standard), Fluorocarbon...

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1190 Low Pressure Gas Blanketing Regulator - 4

TYPE 1098-EGR MAIN VALVE TYPE 95H SUPPLY REGULATOR CONTROL LINE SETPOINT ADJUSTMENT FIXED RESTRICTION INLET PRESSURE OUTLET PRESSURE DOWNSTREAM BLEED LINE LOADING PRESSURE PILOT SUPPLY PRESSURE ATMOSPHERIC PRESSURE Figure 2. Operational Schematic Principle of Operation The Type 1190 gas blanketing regulator reduces a high-pressure inert gas to maintain a positive low-pressure of blanket gas over a stored liquid while liquid is being pumped out of the tank. Also, when the tank suddenly cools causing tank vapors to condense, the Type 1190 regulator replaces the condensing vapors with an inert...

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1190 Low Pressure Gas Blanketing Regulator - 5

Bulletin 74.1:1190 Table 3. Main Valve Orifice Diameters and Valve Plug Travels TRAVEL BODY SIZES ORIFICE DIAMETER Restricted Capacity Table 4. Proportional Bands PROPORTIONAL BAND OUTLET PRESSURE RANGES Green Main Valve Spring Blue Main Valve Spring Red Main Valve Spring 60 psig / 4.1 bar Maximum Inlet Pressure 60 to 125 psig / 4.1 to 8.6 bar Maximum Inlet Pressure Range 125 to 300 psig / 8.6 to 20.7 bar Maximum Inlet Pressure Range When downstream demand has been satisfied, outlet pressure tends to increase slightly, acting on the pilot and main valve diaphragms. When the outlet pressure...

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1190 Low Pressure Gas Blanketing Regulator - 6

Bulletin 74.1:1190 Table 5. Maximum and Minimum Differential Pressures for Main Valve Spring Selection 300 or body rating limit, whichever is lower 20.7 or body rating limit, whichever is lower 300 or body rating limit, whichever is lower 20.7 or body rating limit, whichever is lower 300 or body rating limit, whichever is lower 20.7 or body rating limit, whichever is lower MINIMUM DIFFERENTIAL PRESSURE REQUIRED FOR FULL STROKE MAXIMUM ALLOWABLE DIFFERENTIAL PRESSURE SPRING COLOR MAIN VALVE SPRING PART NUMBER 14A9687X012 BODY SIZES 300 or body rating limit, whichever is lower 20.7 or body...

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1190 Low Pressure Gas Blanketing Regulator - 7

Bulletin 74.1:1190 Table 7. Gas Flow Required for Thermal Heating (Outbreathing) or Cooling (Inbreathing) per American Petroleum Institute Standard 2000 (API 2000) (Interpolate for Intermediate sizes) VESSEL CAPACITY AIR FLOW RATE REQUIRED Table 8. Flow Coefficients PIPING STYLE Line Size Equals Body Size Piping BODY SIZES Drilled Hole Whisper Trim™ Cage Regulating Wide-Open Regulating Wide-Open Regulating Wide-Open Regulating Wide-Open 2:1 Line Size to Body Size Piping BODY SIZES Standard Linear Cage Cg Drilled Hole Whisper Trim™ Cage Regulating Wide-Open Regulating Wide-Open Regulating...

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1190 Low Pressure Gas Blanketing Regulator - 8

Bulletin 74.1:1190 Table 9. Supply Pressure(1) Settings Required for the Type 95H Regulator TYPE EGR SPRING COLOR SUPPLY PRESSURE Type Y191A Spring Color Orange Light Blue 1. The pressures shown in the table are the minimum supply pressures required by the pilot. If the inlet pressure is less than shown, an external pilot supply is necessary. Table 10. Flow Capacities in SCFH / Nm3/h of 0.97 Specific Gravity Nitrogen INLET PRESSURE OUTLET PRESSURE CAPACITIES IN SCFH / Nm3/h OF 0.97 SPECIFIC GRAVITY NITROGEN NPS 1 / DN 25 Body Ordering Information Install the Type 1190 regulator as shown in...

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