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Y610A, Y611A and Y612A Series Vacuum Service Equipment and Relief Valves

Y610A, Y611A and Y612A Series Vacuum Service Equipment and Relief Valves
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Y610A, Y611A and Y612A Series Vacuum Service Equipment and Relief Valves - 1

Y610A, Y611A, and Y612A Series Vacuum Service Equipment and Relief Valves Figure 1. Type Y610A or Y610AP Vacuum Breaker Introduction The Y610A, Y611A, and Y612A Series devices (Figures 1 through 4) are used in a wide variety of vacuum and relief service applications. The Y610A Series devices are used as vacuum breakers, the Y611A Series devices are used as either vacuum breakers or relief valves, and the Y612A Series devices are used as vacuum regulators. • Installation Adaptability—360-degree adjustability of the body/diaphragm case connection and four-position vent mounting permit flexibility in vent positioning and installation in awkward positions or limited spaces. Units may be mounted in any orientation without affecting proper operation. • Tamper-Resistant Adjustment—Closing cap and spring case on most types allow installation of sealing wire to discourage or detect unauthorized adjustment of the pressure setting (Figure 2). • Rugged Construction—Diaphragm case and internal parts are designed to withstand vibration and shock. D103115X012 • Precision Control of Low-Pressure Setting— Large diaphragm areas provide more accurate control at low-pressure settings. • Corrosion Resistance—Constructions are available in a variety of materials for compatibility with corrosive process gases.

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Y610A, Y611A and Y612A Series Vacuum Service Equipment and Relief Valves - 2

Bulletin 71.3:Y610A Specifications Available Configurations See Table 1 Body Sizes (Inlet x Outlet) and End Connection Style(1) Type Y610A, Y610AP, Y611A, Y611AP, Y612A, or Y612AP: 1-1/2 x 1-1/2, 2 x 2 NPT, or NPS 2 x 2 / DN 50 x 50, CL125 FF, or CL250 RF flanged Pressure Information(2) Type Y610A or Y610AP Vacuum Breaker: See Table 2 Type Y611A or Y611AP Relief Valve: See Table 3 Type Y612A or Y612AP Vacuum Regulator: See Table 4 Port Diameters and Flow Coefficients TYPE NUMBER SEAT RING PORT DIAMETER Cg WITH FULLY OPEN DISK Typical Flow Capacities and Performance Curves Y610A Series...

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Y610A, Y611A and Y612A Series Vacuum Service Equipment and Relief Valves - 3

Bulletin 71.3:Y610A TWO WAY STABILIZER VENT VACUUM TO BE LIMITED TYPE Y610A (ALSO TYPICAL OF TYPE Y610AP) INLET PRESSURE Figure 2. Y610A Series Vacuum Breaker Construction ATMOSPHERIC INLET CONTROL LINE TO SPRING CASE Figure 3. Y611A Series Vacuum Breaker Construction Y610A and Y611A Series Vacuum Breakers vacuum, to enter the system and restore the controlled vacuum to its original pressure setting. These vacuum breakers are used in applications where an increase in vacuum must be limited. An increase in vacuum (decrease in absolute pressure) beyond a certain value registers underneath the...

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Y610A, Y611A and Y612A Series Vacuum Service Equipment and Relief Valves - 4

VACUUM BEING REGULATED HIGHER VACUUM SOURCE TYPE Y612A (ALSO TYPICAL OF TYPE Y612AP) Figure 4. Y612A Series Vacuum Regulator Construction Y612A Series Vacuum Regulators These vacuum regulators (Figure 4) maintain a constant vacuum at the regulator inlet. A decrease in this vacuum (increases in absolute pressure) beyond this value registers underneath the diaphragm and opens the disk. This permits a downstream vacuum of lower absolute pressure than the upstream vacuum to restore the upstream vacuum to its original pressure setting. To determine capacities at outlet or relief set pressure not...

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Y610A, Y611A and Y612A Series Vacuum Service Equipment and Relief Valves - 5

Bulletin 71.3:Y610A Note that if the actual change in outlet (controlled) pressure (from the service condition) is less than the change in outlet (controlled) pressure required to fully open the vacuum breaker or regulator Table 2 or 5, the Cg in formula (1) must be reduced accordingly. To obtain the correct reduced Cg, multiply the Specifications section Cg by the ratio of the actual change in outlet (controlled) pressure to the change in outlet (controlled) pressure required to fully open the vacuum breaker or regulator. Relief Valve Application Q = (P1 + buildup) abs Cg x sin (P1 +...

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Y610A, Y611A and Y612A Series Vacuum Service Equipment and Relief Valves - 6

Table 1. Available Configurations TYPE NUMBER Vacuum breaker or relief valve Relief pilot with solid throat Relief pilot with bleed hole in throat for Type 66RR Vacuum regulator 1-1/2 or 2 NPT end connections and spring case with 1 NPT screened vent Internal registration Vacuum breaker External registration with 1/2 NPT downstream control line connection Light diaphragm plate(s) Heavy diaphragm plate(s) O-ring stem seal Table 2. Types Y610A and Y610AP Vacuum Breaker Pressure Information MAXIMUM EMERGENCY OUTLET (CASING) PRESSURE (POSITIVE) TYPE NUMBER MAXIMUM ALLOWABLE INLET (BODY) PRESSURE...

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Y610A, Y611A and Y612A Series Vacuum Service Equipment and Relief Valves - 7

Bulletin 71.3:Y610A Table 3. Types Y611A and Y611AP Relief Valve Pressure Information TYPE NUMBER MAXIMUM ALLOWABLE INLET (CASING) PRESSURE(1) MAXIMUM OPERATING INLET (RELIEF) PRESSURE TO PREVENT PART DAMAGE(1) INLET RELIEF SET PRESSURE RANGE CONTROL SPRING COLOR CODE, PART NUMBER With Spring Case Above Diaphragm With Spring Case Below Diaphragm BUILDUP OVER INLET PRESSURE REQUIRED TO FULLY OPEN RELIEF VALVE Table 4. Types Y612A and Y612AP Vacuum Regulator Pressure Information MAXIMUM ALLOWABLE INLET (CASING) PRESSURE MAXIMUM OPERATING INLET PRESSURE TO PREVENT PART DAMAGE With Spring Case...

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Y610A, Y611A and Y612A Series Vacuum Service Equipment and Relief Valves - 8

INLET PRESSURE, mbar INLET PRESSURE, psig FLOW RATE, SCFH / Nm3/h OF AIR NPS 1-1/2 OR 2 / DN 40 OR 50 TYPE Y611A WITH 1-3/16-INCH / 30 mm SEAT RING NOTE: SEE CAPACITY INFORMATION SECTION FOR CONVERSION TO EQUIVALENT CAPACITIES OF OTHER GASES AND/OR CUBIC METERS PER HOUR. EACH CURVE REPRESENTS A DIFFERENT CONTROL SPRING AS MARKED AND INITIAL RELIEF SET PRESSURE FOR THAT SPRING AS GIVEN IN TABLE 6. DO NOT BASE YOUR CAPACITY ON A CONTROL SPRING SETTING HIGHER THAN THE MAXIMUM OPERATING INLET (RELIEF) PRESSURE TO PREVENT PART DAMAGE AS GIVEN IN TABLE 3. SPRING 1A630627022 WITH 1-3/16-INCH / 30...

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Y610A, Y611A and Y612A Series Vacuum Service Equipment and Relief Valves - 9

Bulletin 71.3:Y610A Table 6. Selected Y611A Series Relief Valve Capacities CONTROL CONSTRUCTION, SPRING PART RELIEF SET PRESSURE NPS / DN NUMBER 1D892527022 14 inches w.c. / 21 inches w.c. / 35 mbar 52 mbar CAPACITY, SCFH / Nm3/h OF AIR(1) AT FOLLOWING BUILD-UP OVER RELIEF SET PRESSURE 1. See Capacity Information section for conversion to equivalent capacities of other gases and/or Nm3/h. Table 6. Selected Y611A Series Relief Valve Capacities (continued) CAPACITY, SCFH / Nm3/h OF AIR(1) AT FOLLOWING BUILD-UP OVER RELIEF SET PRESSURE CONTROL SPRING PART NUMBER 1D892527022 1. See...

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