Estimate pressure drop across 100 mesh lined basket type strainer provided in a 6. An exclusive proprietary software can calculate the pressure drop for any design condition and strainer configuration. Calculations are possible only, if javascript is activated in your browser. High pressure drop tower spray nozzles in combination with tower bypass. P obtained from the charts by the specific gravity of the fluid in question. This pressure drop chart is based on the flow of clean water through the. 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. In air conditioning plant, cold water is circulated through chiller evaporator coil where it reject the heat and then. The table below lists the flow rate cv, in gallons per minute of water that will result in 1. Differential pressure switch which senses the pressure drop across the strainer and initiates a cleaning cycle at a preset pressure differential. In water service with a 30 gpm flow rate, it will have a 1.
However, in pumped water or viscous fluid systems, the pressure drop can be significant. Pressure drops for models 30, 50, 510, 570 and 72 strainers are all available and in isc sales inventory. See page 102 for the applicable pressure drop calculation. Pressure drop charts y type strainers cast the valve shop. Pressure drop online calculator calculation of pressure drops of flowing liquids and gases in pipes and pipe elements laminar and turbulent flow. Flow rate 700gpm viscosity 100cp specific gravity 1 the pressure drop chart for basket strainers indicates a drop of 0. Pressure drop calculation selection of the filtration mesh. 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. For fluids other than water, multiply the pressure drop.
Find your desired rate of flow gpm on the left hand. In literature the pressure loss behaviour is commonly described with the dimensionless friction factor fr. Pushbutton start for which an operator pushes a button to initiate a cleaning cycle semiautomatic. Engineering specification for the selection, installation. From the numerical calculation, a formula is proposed which can accurately predict the pressure drop through the microfilter.
For style 1 basket strainers multiply value obtained in figure 2 by 1. This version is usable for browsers without javascript also. Pressure drop chart pipeline ystrainers, check valves. Strainers should have flow capacities quoted in terms of a capacity index or kvs value. In that case, the pressure drop will only be calculated based on the quantity mentioned in first column. Consult our engineering department for pressure drop. Standard cast pipeline strainers national strainer corp. Basket strainers are normally installed in a horizontal pipeline with the cover over. From this point of intersection, follow the vertical line down to the bottom of the chart to determine the approximate pressure drop. While there are some high pressure applications for basket strainers. Prediction of pressure drop in chilled water piping system using theoretical and cfd analysis article pdf available in international journal of engineering and technology 54. One of the most important design considerations when purchasing a strainer is specifying the perforation or. Estimate pressure drop across 100 mesh lined sure flow ystrainer provided in a 10.
They are intended for applications where small amounts of solid particulate are expected, and where cleanout will be infrequent. Y strainers take their name from their configuration. Determine a the head loss and b the pressure drop if the pipe slopes down at 10 in the. Selection of the filtration mesh filtration mesh is the heart of strainer system and also some selection parameters are explained. Smspressuredropclog theoretical pressure drop curve for. 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. Multiply the pressure drop obtained from 1 by the specific gravity of the liquid. Their equations are applicable to calculate the influencing geometry. Estimate clean pressure drop in cone strainer chemical.
The pressure loss across a strainer can be calculated using the systems flow rate and the cv factor for that strainer. It is intended that each potential trouble source be evaluated so that the necessary design safeguards can be erected against. This application can be used to estimate the pressure drop across a strainer with a standard mesh for given strainer size and liquid flow. To access the working calculator, please sign up for free membership trial. Flow rate 1,300 gpm viscosity 100 cp specific gravity 0. Sample sure flow y strainer calculation estimate pressure drop across 100 mesh lined sure flow y strainer provided in a 6.
Timer which initiates cleaning cycle of strainer at preset intervals of time. Request pdf handling the pressure drop in strainers a strainer is a. Prediction of pressure drop in chilled water piping system. Pressure drop chart y strainers flanged end above based on the flow of clean water through. 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. P obtained from the charts by the corresponding correction factor shown in. For finer mesh screens that are backed with a perforated sheet, multiply the pressure drops shown at right by the following.
Additionally, table 4 presents a general guide for selecting straining element sizes for water, steam, oil, gasoline and air. As described above the multiplying factor for a 50% clogged basket is 2. Filtration mesh is the heart of the strainer system and. Flow resistance of metallic screens in liquid, gaseous and. Pressure drop curves are based on water flow with standard screens. See theoretical pressure drop curves for screen clogging in the technical data section for multiplying factors for clogged screens. They are most commonly used in pressurized lines, gas or liquid, but can also be used in suction or vacuum conditions. Eaton can fabricate a strainer just for you according to your specifications. Where cost is of prime importance, a temporary strainer may be installed between flanges in a pipeline. Consult our engineering department for pressure drop information on steam, gases or viscous fluids. Virtually all major applications and products are discussed. Eaton pipeline strainer pressure drop calculations free download as pdf file. Lack of tower treatment with consequent fouling of the condenser. Flow rate 700 gpm viscosity 100 cp specific gravity 0.
Figure 1 figure 2 threaded basket strainer pressure drop liquids sizes 1 2 1. Appropriate and economical selection of pump requires accurate prediction of pressure drop in chilled water piping circuit and hence calculation of pressure drop is the initial step of the pump selection process. 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. Estimate clean pressure drop in cone strainer unclesyd materials 24 apr 06 20. This graph gives pressure drop based on specific gravity of water 1. Calculate pressure drop in filters and strainers separation. Full traceability of all parts of all strainers ever produced.
Determination of pressure drop determination of component. A strainer is used to protect other downstream equipment e. Different basket shapes are available to meet pressure drop requirements. Simplex, duplex, ytype, temporary strainers, baskets and. Please refer to each strainer s specification sheet for standard perforation size recommendations. 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. Pressure drop calculations to accurately calculate the pressure loss for filters and strainers in a pipeline, proceed as follows. First calculate pressure loss using cv factor formula at right. Smspressuredropclog theoretical pressure drop curve for screen clogging. 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. 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. 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.
For example, a 1 model 72 simplex strainer with a perforated basket has a cv factor of 22. Obtain water pressure drop from graphs on appropiate product page. Take the pressure loss figure obtained in 1 and recalculate it using the. E since a nonstandard screen is being used, we must calculate the ratio free area to pipe area. 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. The purpose of the guideline is to lay down the procedure for estimation of pressure drop across filters strainers in a piping system. Flanged basket strainer pressure drop liquids sizes 2 to 24 figure 2. Sample sure flow basket strainer calculation estimate pressure drop across 100 mesh lined sure flow y strainer provided in a 10. See page 16 for correction factors to be used with other fluids andor screen openings. Handling the pressure drop in strainers request pdf researchgate. Pressure drop online calculator for mobile and pda. 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. Pressure drop chart temporary cone and basket strainers. Pressure drop data y strainers y strainer pressure drop liquids sizes 14 to 112 figure 1.
Prediction of the pressure drop through micromachined. Engineering data screen openings for basket strainers. 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. The pressure drop across most strainers is relatively small compared with the pressure drop across thick media filters or membrane filters. The screen openings chart indicates the % open area of 100 mesh is 30%. Introduction to strainer in piping the process piping. Service with services that require extremely sturdy screens, such as high pressure temperature applications or services with high. This is a sample of the strainer pressure drop calculator. Temporary strainer pressure drop correction factors mesh lined baskets andor fluids with a viscosity other than water 1. Engineering specification for the selection, installation and maintenance of pipeline strainers.
Pressure drop calculations for pipeline strainers isc sales. Eaton pipeline strainer pressure drop calculations scribd. Pdf prediction of pressure drop in chilled water piping. 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.
E since a non standard screen is being used, we must calculate the ratio free area to pipe area. Find your desired rate of flow gpm on the left hand side of the chart. For mesh lined screens, multiply the pressure drop. Optimization of large size fabricated ystrainers for. 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.
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