Performance Data on Water Jet Exhausters and Compressors

Transcription

1 Performance Data on Jet Exhausters INTRODUCTION This supplemental data should be used in conjunction with S&K Bullletin P which describes the construction, operation, and application of Schutte & Koerting Jet Exhausters. Bulletin P contains general information on all types and sizes, together with dimensional data. This Supplement contains complete information on sizing this equipment. For sizing information on this S&K equipment, refer to the following index: Fig. 6 Single-Nozzle Jet Exhauster Fig. 88 Multi-Nozzle Jet Exhauster Fig. 89 Multi-Nozzle Jet Exhauster Fig. 8 Single-Nozzle Jet Exhauster Fig. 8 Single-Nozzle Jet Exhauster Index Description Page Fig. 8 Single Nozzle High Capacity Jet Exhauster - Fig. 88 & Fig. 89 Multi-Nozzle, High Capacity Jet Exhauster - Fig. 6 Single-Nozzle General Purpose Jet Exhauster 6 Fig 6 & Fig. 8 Single Nozzle Jet Exhauster 7-9 Schutte & Koerting Metropolitan Drive Trevose, PA 9 USA tel: () 69-9 fax: () sales@s-k.com

2 FIg. 8 SINglE NOzzlE WATER JET ExhAUSTER (handling FREE AIR) SIzINg AND WATER CONSUmPTION DATA Example: To determine the size of S&K Fig. 8 Jet Exhauster required, and the water consumption rate, to meet the following conditions: = psig Suction = F Suction = in. Hg. abs. Air Handling Capacity = scfm Solution: Refer to Curve. Select horizontal line at base of curve representing water temperature of F (). Read horizontally across until water temperature line intersects in. Hg. abs. suction pressure line (). Project line vertically up to the proper water pressure curve representing psig (). Read horizontally from intersection and note that the capacity of a " Fig. 8 Exhauster is.9 scfm (). Divide required capacity ( scfm) by capacity of a " size (.9 scfm) to find capacity ratio, as Chart. Suction And Capacities of " Single Nozzle Jet Exhauster (Atmospheric Discharge), Fig. 8. Capacity - scfm air psig water pressure psig psig psig psig psig psig scfm = 7.9 capacity ratio.9 scfm.. Refer to Capacity Ratio Table and note that the /" size has a capacity ratio of 6. and the " size has a capacity ratio of 9.. The larger size exhauster () should be selected to meet service conditions. To find the water consumption rate for this size exhauster, refer to Table and note that a " size operating with a water pressure of psig will consume 86 gpm (6). Motive Temperature in ºF 9 7 Suction - Inches Hg. Abs. Table. Relative Capacities of Single Nozzle Jet Exhauster, Fig. 8. Exhauster Size (Inches) Capacity Ratio /.6 /.6. /.89. / Table. Capacities of Single Nozzle Jet Exhauster, Fig. 8. Size - psig in Inches / * / * * / / Approximate Consumption in GPM Note: All Flows at " Hg. abs. *Require psig minimum. Schutte & Koerting Metropolitan Drive Trevose, PA 9 USA tel: () 69-9 fax: () sales@s-k.com

3 FIg. 8 SINglE NOzzlE WATER JET ExhAUSTER SIzE DETERmINATION (EVACUATINg TImE, PUmP PRImINg, ClOSED TANk EVACUATION) how to Size Exhauster for Priming Example: Determine proper size Exhauster and amount of water required for priming a pump and suction line in an allowable time of two minutes if the total volume is cu. ft. The lift is ' and the water pressure available is psig. Solution: (See solid lines, Chart ):. Divide time allowable in seconds by the volume in cu. ft. x =. sec./cu. ft.. Enter Table at ' of water and read below it the equivalent in. Hg. In this case 8.8" ().. Enter Chart at 8.8" Hg. vacuum () and read over to psig water curve. Read vertically downward to evacuation rate of. sec./cu. ft. ().. Divide answer in Step by answer in Step.. =.6 - This is the Size Factor.. Enter Table and find size factor equal to or greater than that determined in Step. Read directly above it the size Exhauster required. In this case a /" (). 6. See Table on page for water consumption for a /" Exhauster at psig water pressure. Note that this is gpm. how to Size Exhauster for Closed Tank Evacuation Example: Determine the size Exhauster and amount of water required to evacuate a cu. ft. tank to " Hg. vacuum in minutes, with psig water pressure available. Solution: (See dotted lines, Chart ):. Enter Chart at in. Hg. vacuum (), go horizontally to the psig water curve. Go vertically downward and read evacuation rate of sec./cu. ft. ().. Multiply the evacuation rate found in Step by the volume of the tank. x =. Divide number determined in Step by the allowed time in seconds. x =. Size Factor. Enter Table and find size factor equal to or greater than that determined in Step. Read directly above it the size Exhauster required. In this case a /" ().. See Table on page for water consumption for a /" Exhauster at psig water pressure. Note that this is. gpm. Table. Relative Capacities of Single Nozzle Jet Exhauster, Fig. 8. Size (in Inches) / / / Capacity Ratio Chart. Evacuating and Priming Curves of Single Nozzle Jet Exhauster, Fig. 8. Vacuum - In. Hg. psig psig psig psig Press. - psig Table. Conversion Table From Feet of to In. hg. of Single Nozzle Jet Exhauster, Fig. 8. (Feet) Vacuum (In. hg.) Evacuating Time - Sec./Cu. Ft. Schutte & Koerting Metropolitan Drive Trevose, PA 9 USA tel: () 69-9 fax: () sales@s-k.com

4 FIg. 88 (ThREADED) AND FIg. 89 (FlANgED) multi-nozzle WATER JET ExhAUSTERS (handling FREE AIR) SIzE DETERmINATION AND WATER CONSUmPTION DATA Example: To size an Exhauster for handling scfm of air at " Hg. abs., using psig water at F. Solution: Refer to Chart 6 below. At the F water temperature line (point ), read horizontally to a suction pressure of " Hg abs. (), then vertically up to the psig water pressure curve (). From that point, read horizontally to the first size of Exhauster that will handle scfm (). Read vertically down to determine the required size as a 6 inch Exhauster (). From Table 7, note that a 6 inch Exhauster operating at psig water pressure has a water consumption of 88 gpm (6). Chart 6. Air handling Capacity of multi-nozzle Jet Exhausters (Atmospheric Discharge), Fig. 88 (Threaded) and Fig. 89 (Flanged). Motive Temperature 9 7 psig Suction Inches - Hg. Abs. Exhauster Size Table 7. Approximate Consumption in gpm of multi-nozzle Jet Exhausters, Fig. 88 (Threaded) and Fig. 89 (Flanged). Exhauster Size, Inches (psig) Schutte & Koerting Metropolitan Drive Trevose, PA 9 USA tel: () 69-9 fax: () sales@s-k.com

5 FIg. 88 (ThREADED) AND FIg. 89 (FlANgED) multi-nozzle WATER JET ExhAUSTERS SIzE DETERmINATION (EVACUATINg TImE, PUmP PRImINg, ClOSED TANk EVACUATION) how to Size Exhauster for Priming Example: Determine proper size Exhauster and quantity of water required for priming a pump and suction line in an allowable time of two minutes if the total volume is cu. ft. The lift is ' and the water pressure available is psig. Solution: (See solid lines in Chart 8):. Divide time allowable in seconds by the volume in cu. ft. x =. sec./cu. ft. Enter Table at ' of water and read below it the equivalent in. Hg. In this case." ().. Enter Chart 8 at." Hg. vacuum () and read over to psig water curve. Read vertically downward to evacuation rate of. sec./cu. ft. ().. Divide answer in Step by answer in Step.. =. Size Factor.. Enter Table 9 and find size factor equal to or greater than that determined in Step. Read directly above it the size Exhauster required. In this case a # (). 6. See Consumption Curves for a # Exhauster (inset Chart 8). Locate intersection of." Hg. line with psig water pressure line () and read down. consumption for a # Exhauster is 6 gpm (6). Note that the size factor for a # Exhauster (in Table 9) is.. Multiply 6 x. = 8 gpm for a # Exhauster. how to Size Exhauster for Closed Tank Evacuation Example: Determine the size Exhauster and quantity of water required to evacuate a cu. ft. tank to " Hg. vacuum in minutes, with psig water pressure available. Solution (See dotted lines in Chart 8):. Enter Chart 8 at " Hg. vacuum (), go horizontally to the psig water curve. Go vertically downward and read evacuation rate of 7 sec./cu. ft. ().. Multiply the evacuation rate found in Step by the volume of the tank. 7 x = seconds. Divide number determined in Step by the allowed time in seconds. =.9 - This is the Size Factor x. Enter Table 9 and find size factor equal to or greater than that determined in Step. Read directly above it the size Exhauster required. In this case a # ().. See Consumption Curves for a # Exhauster (inset Chart 8). Locate intersection of " Hg. line with psig water pressure line () and read down. consumption for a # Exhauster is.6 gpm (). Table 9. Relative Capacities of multi-nozzle Jet Exhausters, Fig. 88 (Threaded) and Fig. 89 (Flanged). Size (in Inches) Capacity Ratio Chart 8. Consumption and Evauation Time of multi- Nozzle Jet Exhausters, Fig. 88 (Threaded) and Fig. 89 (Flanged). Vacuum In Inches Hg. psig psig psig Vacuum - in Hg. Abs. Consumption For A No. Type 88 Or 89 Exhauster psig Table. Conversion Table From Feet of to In. hg. of multi- Nozzle Jet Exhausters, Fig. 88 (Threaded) and Fig. 89 (Flanged). (Feet) Vacuum (In. hg.) '." ' 8.8" '." gpm ' 7.6" Evacuating Time Seconds Per Cu. Ft. Schutte & Koerting Metropolitan Drive Trevose, PA 9 USA tel: () 69-9 fax: () sales@s-k.com

6 FIg. 6 SINglE NOzzlE WATER JET ExhAUSTER SIzE DETERmINATION AND WATER CONSUmPTION DATA Example: Determine size and water requirement for following conditions: pressure - psig Vacuum requirement - " Hg. (" Hg. abs.) Air handling - 8 pounds per hour Solution: From Chart at vacuum of " (point ) and water pressure psig (point ), read suction capacity of. PPH (point ) for a " Fig. 6. Divide required capacity (8 PPH) by. to get capacity factor: 8 =.6. The nearest capacity factor is. (point ) or a " Fig. 6 Jet Exhauster. Select " Fig. 6 Exhauster. requirement is: 9 GPM (point ) x = 6 GPM at psig. Table. Relative Capacities of Single Nozzle Jet Exhauster, Fig. 6. Size (in Inches) / / / / Capacity Ratio Table. Approximate Consumption in gpm, " Size Single Nozzle Jet Exhauster, Fig. 6. (psig) Flow (gpm) Chart. Air handling Capacity of Single Nozzle Jet Exhauster, Fig Vacuum - In. Hg. 6 8 psig psig psig psig 6 psig psig Suction Capacity - Lb. Per Hr. 6 Schutte & Koerting Metropolitan Drive Trevose, PA 9 USA tel: () 69-9 fax: () sales@s-k.com

7 Fig. 6 & Fig. 8 Jet Exhauster Performance Operating P Operating Flow Q Specific Gravity Viscosity (psig) (gpm) Fig. 6/8 gas handling Suction Ps (in Hg abs) Suction Flow Qs (SCFM) or Volume to be Evacuated (ft ) and Required Time (Min) Discharge Head P (ft) *Note: Sizing information is based on water. If liquids are other than water please refer to "Determination of Operating Conditions for Fluids other than " on this page below. Fig. 6 & Fig. 8 Jet Exhauster Selection Procedures Evacuating. Determine the evacuation time in minutes per ft. Evacuation time (min) Volume Evacuated (ft. ). Enter Table at the available operating water pressure P (psig) and required suction pressure Ps (in HG abs). Read across the table on the line closest to the Ps to the value closest to the evacuation time determined in step. Note unit size & Fig. # listed at the top of the table.. Continue across the table to the last two columns to determine the water consumption for Fig # chosen. Multiply this value times the capacity factor list in Table for the unit size chosen. Exhausting. Refer to Table 6 Air Handling Capacity for 6/8. Find the Suction Required (Ps) and the Operating (P) on the left side of the chart.. Follow the row across the table to the column corresponding to the discharge pressure (P). Note the Capacities in (SCFM) for each unit. Continue across the row to the last two columns to determine the water consumption.. Calculate the CF for each unit by dividing Ws Required/Ws from table. Select the unit size from Table 7 for the unit having the CF equal to or greater than the value determined.. Determine water consumption by multiplying the CF selected by the water consumption determined in step.. Determine Fig. # and size unit to use based on performance and operating water consumption. Schutte & Koerting Metropolitan Drive Trevose, PA 9 USA tel: () 69-9 fax: () sales@s-k.com 7

8 Fig. 6 & Fig. 8 Jet Exhauster Performance Table 8-. Single Nozzle Jet Exhauster Evacuation Time, Fig. 6 & Fig. 8 Operating (P) Suction hg. Abs. (Ps) Time in minutes Per Cubic Feet of Air Operating Used gpm (Qm) /" " -/" " " Unit gpm " " " " " " " " " " " " " " " " " " " " " " " " " " " " " Table 8-. Capacity Factor of Single Nozzle Jet Exhauster, Fig. 6 & Fig. 8 Size in Inches / / Factor Unit Description: Fig. 6 & Fig. 8 Jet Exhauster utilizes spiral in the motive liquid nozzle to achieve better air handling qualities. Conversions: SCFM - Q gas (ACFM) x o R x gas (PSIA) Temp gas ( o R) x.7 (PSIA) SCFM = W gas (lb./hr) x 9 x Molecular weight gas x. 8 Schutte & Koerting Metropolitan Drive Trevose, PA 9 USA tel: () 69-9 fax: () sales@s-k.com

9 Fig. 6 & Fig. 8 Jet Exhauster Performance Table 8-6. Air handling Capacities of Single Nozzle Jet Exhauster, Fig. 6 & Fig. 8 Suction hg. Abs. (Ps) Operating PSIg (P) Capacity in SCFm at Discharge Qs Operating Used gpm (Qm) PSIg PSIg PSIg PSIg PSIg gpm ISO 9 Certified Schutte & Koerting Metropolitan Drive Trevose, PA 9 USA tel: () 69-9 fax: () sales@s-k.com 9 7