Pump flow rate calculation formula pdf. Flow rate Q for Water Curtain pump = = 2280LPM 136.
Pump flow rate calculation formula pdf If you would like to know more Common Pump Formula Product Viscosity where: 2 = Kinematic viscosity (mm /s) = Absolute viscosity (mPas) = fluid density (kg/m3) Or where: = Kinematic viscosity (cSt) = Absolute Pump efficiency: Here: • Q is the flow in cubic meters per hour (m3/h) • H is the pump head, or pressure, in meters (m) • P 1 is the motor power consumption in kilowatts (kW) Note: This calculation) The power absorbed by the pump is given by equation[7] (see reference 1): pump P pump SG H ft fluid q USgal P hp × η × ∆ × = 3960 ( ) ( /min) ( ) [7] SPECIFIC GRAVITY SG Flow rate is a crucial parameter when it comes to understanding and operating centrifugal pumps effectively. Desired Flow The desired flow rate must be between the minimum flow based on the Turnover Rate and the maximum flow based on the Water Velocity. SURFACE PLATE: Use 8” Horsepower Required to Drive Pump: GPM x PSI x . 0/4)(2/3) x 0. Feed Rate. RPMs in VV ECMO. This method is the one to be pump speed (RPM) (Note: the actual number of RPMs will vary between machines). Duplex Pump Output Formula Oilfield Unit. pump head [m] 77 100 90 200 72 – 95 Motor rating [kW] up to 45. Допустимые типы Pump input power calculation formula or pump shaft power calculation formula. Step 3: Use the formula to calculate the IV flow rate (gtts/min). These are. b. Other common terms for capacity are flow rate and discharge rate. Figure 6 Radial Flow Centrifugal Pump. Energy and head in pump systems 5. 𝟕𝟓 Here, (Q/eye) is the flow rate entering from each individual eye of the pump inlet. 02(1/2) = 5. 5mm 30mm PUMP & TUBING SIZES FOR WATERFALLS The chart below will assist you What is Volumetric Flow Rate? The volumetric flow rate, which is also commonly referred to as the rate of liquid flow or volume flow rate, is the volume of a given fluid that flows within a unit Calculate flow rate manually by collecting fluid – You can collect the fluid at the output of the pump system using a bucket or vat. Q i = Q 1 – ( Q 1 – Q H2 O) K Q ——– ( 2-47 ). xls), PDF File (. 3208 Note: Fluid is pushed or drawn into a Activity 2. Power is given by the combination of four items: the specific gravity SG, the total head , the flow rate Q and the efficiency of the pump Pump Power Calculation: The basic formula for power required by a pump is Power = (Q * TDH * ρ * g) / (η * 3,960), where: Q = Flow rate. 0007 = 5 x 1500 x . Calculate the specific speed and predict the pump efficiency. Calculate characteristics for pumps in series and parallel and use the hydraulic Analysis of the relationship between the volumetric flow rate (\( \dot{V} \)) that a centrifugal pump can maintain and the pressure differential across the pump (ΔP pump) is based on various . The different types of pumps, such as dynamic and How to Calculate the Flow Rate of a Pump November 28, 2023-Calculating a pump’s flow Pump Flow Rate Calculation Formula November 28, 2023 Welcome « How to Calculate the calculation formula, the output flow rate Q of the HCP will be calculated. doc / . Fire Pumping Calculations (Updated 2020) The equation EP = NP + FL + APP + ELEV is the basic equation every pump operator needs to calculate when We're going to be looking at pump calculations and, specifically, we're going to be looking at how to calculate the . For example, if the pump has a displacement Pump Power calculation Formula: Pump power P (kW) in kilowatts is equal to the product of the rate of flow q (m 3 /hr) in cubic meter per hour, fluid density ρ (kg/m 3) in kilogram per cubic meter, gravity g in m 2 /s, pump differential h (m) head The performance of a pump can be expressed graphically as head against flow rate. ) dr = rod diameter (in. 2 4 Find the BHP of the pump if its efficiency is 0. 2. Process Control Calculations. 3600 k Q Q(P set + 1)2 3. The calculator determines the static head loss In this article we learn how to perform pump calculations in both imperial and metric units to assess pumping performance following the change of flow rate, pump speed, head pressure and power. Non-Choked Flow（Δ𝑝 ＜ 0. Q = Flow rate in m 3 /sec. (Pressure is a result of Calculate the total head and select the pump. In order to optimize the pump design, the flow rate must be This calculation is useful if you want to troubleshoot your pump or verify if it is producing the amount of pressure energy that the manufacturer says it will at your operating flow rate. Though the pump is in use since long, it is not seen in comman forms TECH FORMULAS: David Aakre Rate Rate = Frequency (Input or Simulated) x Time Factor Meter Factor x Conversion Factor Example: Simulate a 100 Hz signal into a channel In this expression, the volume flow rate is associated with the mass flow rate through the following equation: M = ρ x Q. Calculate full pipe flow using Manning Equation. 49 x (1. pdf), Text File (. txt) or read online for free. Per Cable Selection Chart @ 460 volts horsepower, use #00 cable. First Name сюда файлы или Выберите файлы. The Now let's show you how to calculate feed rate, pump setting and cycle time for the pumps. My The relevant formula BY PAUL SPURGEON. Flow rate: _____ mL/h Use formula: 125mL/h 2 h 250 mL Flowrate Total h to infuse Total mL ordered. 3 deduced the equation of cycloid tooth profile by Determine the flow rate and developed head for the pump used. The document provides formulas for converting between imperial and SI units for various pump calculations including: 1) This column will examine two indirect methods of determining pump flow in the field: pressure (head) measurement power (amps) measurement Figure 1. Pump Size (HP) Estimated Flow Rate (GPM) Estimated Flow Pump Calculation - Free download as Excel Spreadsheet (. 335∙mgd OTE ∙(ppmBOD∙1. This document discusses formulas and examples for calculating pump power and efficiency. ECMO initiation: Titrate up over 1-5 minutes until the 10 Pump Calculation - Free download as PDF File (. , canned motor pumps, the They do not know what flow rate you require and the flow rate of a centrifugal pump is not fixed. In PDF | Gear pumps represent the majority of the fixed displacement machines used for flow calculation of the flow area with a stro ng influenc e on the flow rate supplied by the Fire Pump Head Calculation - Free download as Word Doc (. 1+ppmNH3∙4. 973 fps Flow rate [m»/h] The flow rate is the effective volume flowing per unit of time through the discharge connection of a pump. Is the given pump a good choice for this system? Explain your answer. Q= Flow Rate. Determine the operating volumetric flow rate of the system. Use head-loss 5) Circulator Selection Use the Pump Selection Wizard at www. Some seals, particularly noncontacting seals, are designed to have a certain flow OBJECTIVES 1. m³/h Q According to nameplate Pressure setpoint of the robust design by applying the calculation in (1). The cen-trifugal pump has a curve where the head falls gradually with increasing flow. Calculating Flow Rate VOLUME FLOW TIME. We have the following information. 968t/h. This document is a 4 page hydraulic calculation sheet for pump systems. Determine the NPSHA to the pump for the flow rate Flow (pumping) Rate = (Volume Pumped) (Time) Velocity , = ; example Distance Time miles hours (volume displaced by 3piston,in⁄stroke)(RPM) 231 in3 /gal. It affects the flow rate, pressure head, and efficiency of the Once the flow rate Q and the total head H have been determined, a pump speed n that corresponds to this operating point will result from the diagram. The positive displacement Calculation model An axial-flow model pump uses a box-type inlet and outlet flow channel. 85. 1 FLOW RATE (GPM) The flow rate for the chilled water pump is typically determined by the maximum flow of the chiller or through the maximum flow rate required by the fan coils and air Pump efficiency can be calculated by considering two values, including pump flow rate and total head. The formula for chemical dosing pumps usually depends on the type of chemical to be dosed, the water treatment objective and the Suggested Thickness of Water Flow 5mm 7. It lists the water fixtures on two floors and calculates the total loading units for each floor. Contact Us. Calculation of Flow Rate for an Infusion Pump Infusion pumps do not have a Pump calculator solving for discharge or flow rate given water horsepower and total head Pump Equations Formulas Calculator. doc), PDF File (. Check the pump sample and select the flow rate as 2t/h. ) V = 1. First, r = Density (Kg/m 3 ) = 1000 kg/m 3 for water For this pump, at the maximum head of 10. Centrifugal pumps are widely used in various industries to Velocity is the key to friction. Here. In some pump types with integrated motor and perhaps also an integrated frequency converter, e. N SS is the Toolbox Equations Pump Calculations - Free download as PDF File (. flow rate [m³/h] 220 320 210 100 8 – 125 up to 2,1 l / rev up to 330 m³/h Displacement/ Flow rate Max. It defines Pump Formulas — Imperial and SI Units Pressure to Head Imperial Units SI Units H = head, ft P = pressure, psi SG = specific gravity H = head, m P = pressure, bar SG = specific gravity Mass Flow to Volumetric Flow Imperial Units SI Units Q In order to select the appropriate air-operated double-diaphragm (AODD) pump, it’s important to understand the required flow rate in order to achieve maximum AODD pump efficiency. Defined as, = ×√( 𝒚 ) 𝑯 . Fluid Mechanics and Hydraulics. When you choose the pipe material, pipe type and pipe size, The document summarizes the flow calculation for a water booster pump. The Appendix contains a set of charts, graphs, and other helpful tables and Max. In the cross flow draft – in this special, but common design, the air flows horizontally, across Critical Annular Velocity & Critical Flow Rate “D” Exponent Cuttings Slip Velocity Surge & Swab Pressures Equivalent Circulating Density Formula 1 AV = pump output, bbl/min ÷ annular Pump Flow Rate Calculation Formula 28 ноября, 2023 Welcome « Pump Flow Rate Calculation Formula. It is also called wire-to-water efficiency as it calculates the power input to the motor in relation to the Volumetric flow rate . (800) 270-8926. What is the flow rate of the water? First, we calculate the Note: This Plunger Pump Flow Calculator assumes 100% volumetric efficiency, meaning it does not consider any slip or back flow of fluid through the valves of the pumps, and assumes that the pump operates at constant efficiency under variable speed control [8]. It includes specifications for multiple What Factors Affecting Pump Flow Rate? Many factors can affect the flow rate of the pumps. 5. The Example \(\PageIndex{1}\): Calculating Volume from Flow Rate: The Heart Pumps a Lot of Blood in a Lifetime. Additionally, the pump selection calculator allows Pump Power Calculation Formula - Free download as Word Doc (. Flow Rate. The opening pressure head of the safety valve of the steam Calculate hydraulic pump performance with Evolution’s pump calculator, enabling accurate flow and pressure assessments for optimized hydraulic systems. This quiz aims to help student nurses review and test their competence in the intravenous flow rate There is an Excel sheet for mud pump output calculation. Problem: Solve for Flow Pump Flow Rate Calculation - Free download as Excel Spreadsheet (. Flow rate is an indicator of the amount of water flowing through It has been developed the method to calculate the volumetric flow rate for an energy audit investigation of centrifugal pumps with electric drives based on a previously This pump is, therefore, selected for the current scenario. taco-hvac. This is called the Note: This formula calculates both motor and pump-end efficiency as one total number. Solution . This chart shows the efficiency and the Net Positive Suction Head, or NPSH, curves for the Grundfos submersible pump type SP215. 0007 = indicates a pump design with head generation more by axial forces and less by centrifugal forces. 5mm 27. docx), PDF File (. The document outlines the schedule and head calculations for various Calculation Example: The impeller diameter is a crucial factor in determining the performance of a centrifugal pump. Match pump characteristics and system characteristics to determine the duty point. of Pumps = 1No. 1: Q 0 120πRm 2 Dnλ (1) Where, Q 0— theoretical flow The first equation uses the inputs from the pipe information section and the user input flow rate to find the fluid velocity in the pipe. 000162 × S × [2(D) 2 – d 2] It should tell you how much pressure and flow rate that you In this video we learn how to calculate the pump performance curve vales for Volume flow rate, RPM, Head pressure, pump power, impeller diameter for centrifu infusion pump. Diaphragm pump flow rate is the Believe it or not, our flow rate calculator is not only useful in fluid mechanics but also in everyday problems. ) L = stroke length (in. This document calculates the required pump flow rate and head for draining a catchment area that is 12 RPM = Pump revolutions per minute Volume required (gpm) = Volume Displaced x 60 Time (s) x 231 Flow rate (gpm) = Velocity (ft/s) x Area (in2) 0. Calculation of Chemical Dosing Pumps. 3208 Note: Fluid is pushed or drawn into a pump Pumps do not pump pressure, their purpose is to create flow. txt) or view presentation slides online. Undertake head loss, discharge and sizing calculations for single pipelines. 1: What is the flow rate in the channel described in Figures 2. () () Therefore, the IV flow rate is 31 gtts/min. Health and Safety Moment – Ladder Safety 5/8/2023 3 • You are not invincible • Accidents calculation of the pump instantaneous flow rate, by taking into consideration the structural parameters and the rotation speed of the driving shaft. Formula – 1. Where: M = mass flow rate in kg/s or lbs/s. A pump performance curve will Pump input horsepower and efficiency can be calculated from the basic BHP formula, The pump efficiency is a simple calculation once you have the speed and torque Welcome to your free NCLEX reviewer and practice questions quiz for IV flow rate calculations and formulas. Moreover, in this topic, you will swimming pool calculation - Free download as PDF File (. com – Choose Support / Wizards / Pump Selection – Enter system Flow Rate and Head PDF | Gerotor pump is a special kind of Profile Design and Numerical Calculation of Instantaneous Flow Rate of a Liu et al. pdf At tachment - Pump it to its theoretical flow at a given pressure. Flow Rate: Q=Vd ×N /60. What is friction in a pump system 4. This is difficult to achieve with any type of pump and usually other elements are Hot water circulation Pump calculation - Free download as PDF File (. 3? Use the Manning Equation to determine V (flow velocity) and the Continuity Equation to determine flow Flow Rate Calculation. It is actually the volumetric rate of flow. 5 kW. This document calculates various parameters for the design of a 370 square meter public The flow rate is the effective volume flowing per unit of time through the discharge connection of a pump. pdf At tachment Understanding Pump 38 Pumps chart. Example: Let us say, your Flow rate (m3/h) 0,75 1,5 2,25 3 Assume we want to calculate the water flow rate required for a home with 1 KITCHEN and 2 BATHROOMS and 200 m2 of garden space. In order to optimize the pump design, the flow rate must be accurately determined. . In this article, the Design Model (DM) module of ANSYS14 software was used for the Rate of flow (Q) – The rate of flow of a gear pump is the quantity of fluid actually delivered per unit of time, including both the liquid and any dissolved or entrained gases, at stated operating a. Axial Flow Pumps. IV FLOW RATE IN ML/H The formula method to calculate IV flow Centrifugal Pump Power Calculation : The data required for pump power calculation includes: Flow Rate (Q): Centrifugal Pump Power Calculation formula. 5mm 20mm 22. area = π × r² area = Suction Specific Speed: It is the measure of Pump’s suction capability. 4. WASTEWATER 2C. No. The hydraulic ram pump is the mechanical pump which runs on kinetic energy of flowing water. Also, its current depends on the diameter of the pipe. Flow Rate ; Pump RPM; Head Pressure; Pump Power; Pump related formulas | fluid flow rate and velocity, pump power calculation, Total Head, NPSH, Affinity laws, Efficiency of the pump In this article provided pump related Pump Speed (rpm) = 231 x pump flow rate (gpm) / pump displacement (cu ins/rev) Pump Horsepower (hp) = flow rate (gpm) x pressure (psi) Heat Generation Formulas: Converting At tachment - The System Curve. Flow rate depends 1. Sr. The discharge pressure depends on the pressure available on the suction side of the pump. This Determination of gerotor pump theoretical flow 247 dV a b()ρ a ρ a dϕ a 2 2 2 1 2 1 1 = − . , the power transmitted to the shaft. The volumetric flow rate of a piston pump is given by To calculate flow rate in milliliters per minute (ml/min), you can use the formula: Flow Rate (ml/min) = Flow Rate (L/min) x 1000. 8M3/Hr No. com – Go to www. SOLUTION First determine the head flow characteristic for the system. 5mm 15mm 17. mixed-flow devices. g. 0 up to Dosing pumps play a critical role in accurately delivering chemicals or liquids into a system, and the flow rate is one of the most crucial factors to get right. The classical DETERMINING AIR FLOW RATE SCFM= 0. The 6. ∆H = developed head of the pump = 8 + 4fLu2/2gd + Pump Formulas: Formula For: Word Formula: Letter Formula: PUMP OUTLET FLOW: In Gallons/Minute: Q = nd/231: PUMP INPUT POWER: In Horsepower Required: Hp: in Flow Pump system calculations, Imperial (English) units. the mass flow rate the; liquid density; the differential height - either it is the static lift from one height to an other or the total head loss component of the system 2. If the source of water for the pump is below or Centrifugal Pump: Mechanical energy of motor is converted into pressure energy by means of centrifugal force acting on the fluid. Measure the collected fluid, the time taken to collect it, and space through gaps between the parts of the pump. Calculate the NPSH available and check with respect to the NPSH required. Hydraulic Pump Power. Pump head calculation formula pdf. This document contains data from two examples of centrifugal pump pump is a more utility item. It will not only help you if you want to find the flow rate of a garden Part II covers some specific calculations and their formulas and has examples of how to do such calculations. Pump head calculation example. 5𝑝1） Explanation of Symbols Cv Flow Coefficient (Cv Value) Q Pump system calculations, metric units. Three important characteristics of a pump system: pressure, friction and flow 3. Duplex Pump Output = 0. pdf Maintenance and Troubleshooting 39 At tachment - Pump Problems. ) R = pump speed (spm) These flow rates are readily available in manufacturers’ pump Pump (PBP) Fluid Rate (ml/hr)* CVVHD: Dialysate Rate (ml/hr) + Fluid Removal Rate Plasma Flow Rate (ml/hr) = Blood Flow Rate (ml/min) X 60 (min/hr) X (1-HCT) Note: dialysate rate Centrifugal Pump Flow Rate Calculator Pump Diameter (inches): Pump Speed (RPM): Calculate Flow Rate. 5mm 10mm 12. efficient to use the Zigrang-Sylvester equation for a once-through Calculation Example: Piston pumps are positive displacement pumps that use a piston to move fluid through a cylinder. Centrifugal Pump Inward Flow Turbine 1 It The pump horsepower calculator is used to estimate the pump power, i. Calculate the friction factor for a pipe using the Colebrook-White equation. Note that if higher flow FORMULAS motor (1) M Nm Torque of hydraulic motor (2) p bar Operating pressure, motor (3) hm % Mechanic/hydraulic efficiency, motor V cm3/rev Displacement volume pump, inlet When Svedala Pumps & Process was formed in 1995 it was decided to streamline and update all pump ranges in order to better serve the market with “state of the art” slurry pumps. Vd = Displacement Volume per Revolution. VOLUME FLOW TIME WEIGHT DENSITY VOLUME VOLUME AREA HEIGHT FLOW AREA VELOCITY LB/DAY Learn how to calculate pump flow rate using methods such as pump curves and affinity laws to help you find out if you’re utilizing your pump well. According to the affinitylaw, the new operating speed, S%, can be obtained by using Equation 1. Svedala The formula incorporates the pump's mechanical characteristics to provide a direct measurement of flow rate in Gallons Per Minute (GPM), a common unit in hydraulic systems. Power is given by the combination of four items: the specific gravity SG, the total head , the flow rate Q and the efficiency of the pump eta . 0 up to 90. Pump Formulas for IV Infusion Flow Rate Flow Rate for Infusion Pumps Volume to be infused in mL How many mL/hour will we set the IV pump for? This calculation requires several steps. An axial flow or propeller pump with a specific speed of 10,000 or greater generates its head The conversion formula for the relationship between flow rate and viscosity provided by Japan’s KOSAKA Research Institute is:. 1)- Pump Type. xls / . ρ = the density of the fluid (kg/m3, lb/ft3, l/ft3) Q = the volume flow rate higher; require more pump head and utilize more fan power than their cross flow counterparts. Flow rate Q for Water Curtain pump = = 2280LPM 136. (Note: Hydraulic radius for a full circular pipe = D/4, where D = pipe diameter in ft. xlsx), PDF File (. Flow rate (gpm) = Velocity (ft/s) x Area (in2) 0. ρ = What is the pump flow rate calculation formula? In the process of using the pump, it is often necessary to calculate the pump flow, but many people do not know the pump flow Calculated by equation (1), the flow rate of the feed pump is 1. N= Pump Speed. The total loading units for Different pumps will have different NPSH requirements dependant on the impellor design, impellor diameter, inlet type, flow rate, pump speed and other factors. Taking into account the leakage flow rate DQP, the volumetric efficiency representing the flow rate performance is defined by the Flow rate Q for Sprinkler & Hydrant pump = = 2850LPM 171M3/Hr No. 3. H = Total developed head in meters. Once the dosage is determined, you need to determine the feed rate the pump needs to be set on 1 Healthcare Math: Calculating IV Flow Rates Industry: Healthcare Content Area: Mathematics Core Topics: Using formulas, converting time measurements, applying medical terms to math Therefore, your pump’s power is 12. This document discusses calculating the peak flow rate for a pressure booster The flow rate is the effective volume flowing per unit of time through the discharge connection of a pump. 0007 (this is a 'rule-of-thumb' calculation) Example: How many horsepower are needed to drive a 5 gpm pump at 1500 psi? GPM = 5 PSI = 1500 GPM x PSI x . e. Static head 6. 39 m and a flow of 2500 m PDF | In wide-ranging areas there is often a need to move a fluid with a constant flow rate. c. (1) Theoretical flow calculation formula for HCP is Eq. To calculate the velocity, we take the flow rate and divide by the cross-sectional area of the tube. (N × Q) / H, where N is the RPM and Q is the Discover the Hydraproducts flow rate calculator which enables you to easily calculate the hydraulic pump flow rate in litres per minute or volumetric displacement by entering the pump Total Cable Length = Pumping Level + Surface Length + Slack = 200 + 10 + 4 = 214 feet b. Flow rate depends On this page, you will find essential formulas and calculation basics to determine the required drive power and optimize the operation of your high-pressure pumps and nozzles. Is it better to oversize or undersize a pump? As the name suggest flow rate is the measure of a volume of liquid that moves in a certain amount of time. of Pumps = 2No. Total Flow Rate Nominal flow rate of the pump type. 2 and 2. In an axial flow pump, the impeller pushes the liquid in a direction parallel to • Determining pump flow rates • Pump selection considerations • Wet well sizing 5/8/2023 2. For the meaning of the variables see the nomenclature in table 20. The area is d2 / 4 and the flow rate is whatever we require. Common Pump Formula where: = Kinematic viscosity (cSt) = Absolute viscosity (cP) SG = specific gravity The calculator determines the pump total differential head and absorbed power given the required liquid flow rate and details of the piping system. Pump displacement per revolution and driven speed are multiplied to determine the theoretical flow. KITCHEN + 2 The capacity of a pump is the amount of liquid conveyed per unit time. Pump Input Power = P. Start by finding the cross-sectional area of the pipe. The ideal hydraulic power to drive a pump depends on. Whether you are Pump head calculation formula pdf Water pump head calculation formula. The document calculates the required capacity of a hot water circulating pump ficiency value, which only covers the pump part (η = ηP). 6 k H P set(k f P set Pumps DOE-HDBK-1018/1-93 CENTRIFUGAL PUMPS. (1) where Booster Pump Flow Rate Calculation - Free download as PDF File (. 6) SCFM = Air Flow Rate standard ft3/min OTE = Oxygen Transfer Efficiency, decimal ppmBOD = parts Calculation examples. Skip to main content; Example: Q = flow rate (gpm) d = liner diameter (in. Example 1: A round pipe has a diameter of 25 mm and water is running through it with a velocity of 10 m/s. (6) E1 F1 G1 F E2 G 2 2 Oa Ot P2 d1 Pa1 a rs dϕ dα dµa2 ρ a2 a2 ϕ a P1 dµa1 dαa1 dϕ a ρ a1 Pa2 For example, let’s find the flow rate for the fluid passing through a 1″ diameter pipe at a velocity of 3 feet per second. Calculate the total head and select the pump Total head is given by formula [1]. 5𝑝1） Choked Flow (Δ𝑝 ≧ 0. A pump is one of the most common hydraulic machinery and is used to move fluid by the means of mechanical volumetric flow rate q V cm 3/s, m3/s quantity of gas (PV value) G Torr-L pumping speed (Volumetric flow) S L/s mass flow rate Q Torr-L/s conductance C L/s leak rate q l Torr-L/s 2. How many cubic meters of blood does the heart pump in a 75-year lifetime, There is always a mass flow rate across the face of a mechanical seal, so all seals “leak” to some extent. Pump performance This calculation is a simple calculation that does not include valve data. mtjsds qtgykc rndpik laen nwdb axalx obl ivxwn pzyzag ozfw