From the numerical calculation, a formula is proposed which can accurately predict the pressure drop through the microfilter. Flow resistance of metallic screens in liquid, gaseous and. Flow rate 700 gpm viscosity 100 cp specific gravity 0. For style 1 basket strainers multiply value obtained in figure 2 by 1.
Estimate pressure drop across 100 mesh lined basket type strainer provided in a 6. Selection of the filtration mesh filtration mesh is the heart of strainer system and also some selection parameters are explained. First calculate pressure loss using cv factor formula at right. It is intended that each potential trouble source be evaluated so that the necessary design safeguards can be erected against. Bulletin str9901 pressure drop data y strainers screen correction factors for nonstandard and mesh lined screens multiply values obtained from figure 1 and 2 by the appropriate values shown below. P obtained from the charts by the corresponding correction factor shown in. Request pdf handling the pressure drop in strainers a strainer is a. Find out about the principles of steam engineering and heat transfer, including a comprehensive guide to engineering best practice covering all aspects of steam and condensate systems.
Pressure drop online calculator calculation of pressure drops of flowing liquids and gases in pipes and pipe elements laminar and turbulent flow. Pressure drop charts y type strainers cast the valve shop. Pressure drop calculations for pipeline strainers isc sales. Smspressuredropclog theoretical pressure drop curve for. Pressure drop calculations to accurately calculate the pressure loss for filters and strainers in a pipeline, proceed as follows. See theoretical pressure drop curves for screen clogging in the technical data section for multiplying factors for clogged screens. As most strainer screens have very large straining and free areas, the pressure drop across the strainer is very low when used on steam or gas systems see example 12. To calculate total pressure drop the following formula is to be used pressure drop due to area ratio pa pi pi c frompressure culve for respective stramer. The pressure loss across a strainer can be calculated using the systems flow rate and the cv factor for that strainer. Obtain water pressure drop from graphs on appropiate product page.
P obtained from the charts by the specific gravity of the fluid in question. High pressure drop tower spray nozzles in combination with tower bypass. Eaton can fabricate a strainer just for you according to your specifications. Y strainers take their name from their configuration. Pressure drop calculation selection of the filtration mesh.
An exclusive proprietary software can calculate the pressure drop for any design condition and strainer configuration. Engineering specification for the selection, installation. The screen openings chart indicates the % open area of 100 mesh is 30%. However, in pumped water or viscous fluid systems, the pressure drop can be significant. Standard cast pipeline strainers national strainer corp. Sample sure flow y strainer calculation estimate pressure drop across 100 mesh lined sure flow y strainer provided in a 6. Pressure drop chart temporary cone and basket strainers tc, tb keckley this pressure drop chart is based on the flow of clean water through the keckley strainer styles listed above with screen perforations ranging from 116 through 18. Pressure drop chart temporary cone and basket strainers. As described above the multiplying factor for a 50% clogged basket is 2. Engineering data screen openings for strainers purpose if the basket strainer is being used for protection rather than direct filtration,ifcs standard screens will suffice in most applications.
A strainer is used to protect other downstream equipment e. Strainers should have flow capacities quoted in terms of a capacity index or kvs value. Prediction of the pressure drop through micromachined. Pressure drops for models 30, 50, 510, 570 and 72 strainers are all available and in isc sales inventory. Flanged basket strainer pressure drop liquids sizes 2 to 24 figure 2. If you need special materials of construction, super high pressure ratings or have special dimensions, our engineers will design and fabricate a strainer just for you. Engineering specification for the selection, installation and maintenance of pipeline strainers. This is a sample of the strainer pressure drop calculator. They are intended for applications where small amounts of solid particulate are expected, and where cleanout will be infrequent. Determination of pressure drop determination of component. Pressure drop curves are based on water flow with standard screens. Estimate clean pressure drop in cone strainer chemical.
While there are some high pressure applications for basket strainers. Simplex, duplex, ytype, temporary strainers, baskets and. Engineering data screen openings for basket strainers. This version is usable for browsers without javascript also. For mesh lined screens, multiply the pressure drop. Consult our engineering department for pressure drop. Pressure drop in pipes pressure drop calculations pressure drop or head loss, occurs in all piping systems because of elevation changes, turbulence caused by abrupt changes in direction, and friction within the pipe and fittings. Pressure drop data y strainers y strainer pressure drop liquids sizes 14 to 112 figure 1. Find your desired rate of flow gpm on the left hand. In air conditioning plant, cold water is circulated through chiller evaporator coil where it reject the heat and then.
They are most commonly used in pressurized lines, gas or liquid, but can also be used in suction or vacuum conditions. To access the working calculator, please sign up for free membership trial. For example, a 1 model 72 simplex strainer with a perforated basket has a cv factor of 22. Differential pressure switch which senses the pressure drop across the strainer and initiates a cleaning cycle at a preset pressure differential. Different basket shapes are available to meet pressure drop requirements. Flow rate 700gpm viscosity 100cp specific gravity 1 the pressure drop chart for basket strainers indicates a drop of 0. Find your desired rate of flow gpm on the left hand side of the chart. Lack of tower treatment with consequent fouling of the condenser. In that case, the pressure drop will only be calculated based on the quantity mentioned in first column. Figure 1 figure 2 threaded basket strainer pressure drop liquids sizes 1 2 1. For example, do not select strainer model wyetpe, size say 1212, quatity 1 in first column and select the same model type and size in second column with quatity 1 to calculate the pressure drop for two same strainer type with same size.
Full traceability of all parts of all strainers ever produced. Pressure drop chart y strainers flanged end above based on the flow of clean water through. Their equations are applicable to calculate the influencing geometry. One of the most important design considerations when purchasing a strainer is specifying the perforation or. This application can be used to estimate the pressure drop across a strainer with a standard mesh for given strainer size and liquid flow. This pressure drop chart is based on the flow of clean water through the.
Service with services that require extremely sturdy screens, such as high pressure temperature applications or services with high. Estimate clean pressure drop in cone strainer unclesyd materials 24 apr 06 20. To calculate pressure drop through vessels using other than 116 perforated baskets, first calculate the pressure drop using the listed cv, and then multiply the result by the correction factor in the correction factors chart above. For finer mesh screens that are backed with a perforated sheet, multiply the pressure drops shown at right by the following. Determine a the head loss and b the pressure drop if the pipe slopes down at 10 in the. The purpose of the guideline is to lay down the procedure for estimation of pressure drop across filters strainers in a piping system. Take the pressure loss figure obtained in 1 and recalculate it using the.
Multiply the pressure drop obtained from 1 by the specific gravity of the liquid. E since a nonstandard screen is being used, we must calculate the ratio free area to pipe area. Estimate pressure drop across 100 mesh lined sure flow ystrainer provided in a 10. Consult our engineering department for pressure drop information on steam, gases or viscous fluids. Pressure drop chart pipeline ystrainers, check valves. The table below lists the flow rate cv, in gallons per minute of water that will result in 1. See page 30 for pressure drop data model 85 heavyduty y strainer a b c npt d clearance to remove screen typical socket weld end y strainer a b c npt d clearance to remove screen typical flanged y strainer a b d clearance to remove screen c npt dimensional drawings typical threaded y strainer eaton filtration standard cast pipeline. Sample sure flow basket strainer calculation estimate pressure drop across 100 mesh lined sure flow y strainer provided in a 10. In literature the pressure loss behaviour is commonly described with the dimensionless friction factor fr. This graph gives pressure drop based on specific gravity of water 1. Timer which initiates cleaning cycle of strainer at preset intervals of time.
Filtration mesh is the heart of the strainer system and. The pressure drop across most strainers is relatively small compared with the pressure drop across thick media filters or membrane filters. Basket strainers are normally installed in a horizontal pipeline with the cover over. Pdf prediction of pressure drop in chilled water piping. Pressure drop online calculator for mobile and pda. However, because of the more circuitous path the liquid must take through a duplex strainer, pressure drop is higher than through the equivalent size single or twin basket strainer. See page 102 for the applicable pressure drop calculation.
Prediction of pressure drop in chilled water piping system. Technical information for standard cast pipeline strainers performing pressure drop calculations are essential for deciding which pipeline strainer is best for your liquid filtration application. Please refer to each strainer s specification sheet for standard perforation size recommendations. Pressure drop online calculator for mobile and pdaelement of pipe. See page 16 for correction factors to be used with other fluids andor screen openings. In water service with a 30 gpm flow rate, it will have a 1.
Pushbutton start for which an operator pushes a button to initiate a cleaning cycle semiautomatic. Optimization of large size fabricated ystrainers for. Eaton pipeline strainer pressure drop calculations scribd. Eaton pipeline strainer pressure drop calculations free download as pdf file.
Calculations are possible only, if javascript is activated in your browser. Introduction to strainer in piping the process piping. Handling the pressure drop in strainers request pdf researchgate. Pressure drop chart flanged y pattern strainers styles a, ba, ba7, sa, sa7, ssa and ssa7 this pressure drop chart is based on the flow of clean water through the keckley y strainers listed above with screen perforations ranging from 364 through 18. Where cost is of prime importance, a temporary strainer may be installed between flanges in a pipeline. For fluids other than water, multiply the pressure drop. Smspressuredropclog theoretical pressure drop curve for screen clogging.
Flow rate 1,300 gpm viscosity 100 cp specific gravity 0. Calculate pressure drop in filters and strainers separation. E since a non standard screen is being used, we must calculate the ratio free area to pipe area. Virtually all major applications and products are discussed. Area ratio factor pressure drop due to flow where, pa hessure bop due to area ratio pa x sg sg specific grmlty for the respective fluid used. From this point of intersection, follow the vertical line down to the bottom of the chart to determine the approximate pressure drop.
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