Specific Speed of pump (Nq) is defined as the speed in RPM at which a geometrically similar impeller … of Impeller. Title: Microsoft PowerPoint - AGITMIXCM_Abraham_Martin.ppt Created Date: 10/7/2003 4:41:31 PM Open - The right impeller below has a completely open space between each blade that allows for easy CIP, but provides less power than disk impellers. Table1.Resultsofcentrifugalpump(impeller) R=R RA-RD (29) C D 3 β=β- β2-β1 (30) 3 βC=β1 β2-β1 (31) 3 R2-R2 L = A B a (32) 2 Rcosβ-Rcosβ A 2 B B Lb= RB-RC 2 RBcosβB-RCcosβC 2 2 ( 3) RC-RD Lc=2Rcosβ-Rcosβ (34) C C D 1 No Descriptions Value Units 1 Specificspeed,ns 147 mm 2 … Specific Speed of Pump. Propeller turbine mixer design calculator solving for Reynolds number given impeller diameter, fluid dynamic viscosity, revolution per second and liquid mass density. Impeller's Diameter Effect - Pump Curve / … 6 Other Pump Formulas Affinity Laws Changes in Diameter Changes in Speed D = diameter, in or mm Q = flow, gpm or m3/h H = head, ft or m P = power, hp or kW Q = flow, gpm or m3/h Both, measured and calculated results are in good agreement. parallel with the axis of the impeller shaft. Type of Impeller (Np) Vessel Diameter Sweep Dia. Figure 3 shows the types and variation of common impellers. Radial-flow impellers generate currents in a tangential or radial direction to the axis of the impeller shaft. Therefore, we will generate a new set of Q and H values for the 11-in impeller by multiplying the given Q values by the factor 1.1 and the H … XylemWaterSolutions 73,706 views. 2:09. Pump flow is taken at the largest impeller diameter For double suction impellers pump flow is divided by two . Using affinity laws for impeller diameter changes, the multiplying factor for flow rate is: Factor = 11/10 = 1.1 and the multiplier for head is (1.1) 2 = 1.21. Within the two classes of impellers there exist three main types of impeller design. Download Video. Flygt - Wastewater N-Pump Adaptive N Impeller Design Explained - Duration: 2:09. A performance curve is a plot of Total Head vs. flow rate for a specific impeller diameter and speed. Tools for Design & Manufactures of Pressure Vessels and Shell & Tube Heat Exchanger Agitator Design (Mech.) backswept impeller with advanced blade geometry and high design rotor pressure ratio (π t12 =4.7:1). Laser measurements and 3D-viscous calculations were performed to verify the design of a 30deg. Curved - Curved (a.k.a. The specific speed “Nq” is a parameter derived from a dimensional analysis which allows a comparison of impellers of various pump sizes even when their operating similar Q -H range.. For a new pump, our calculations of Total Head for a given flow rate will have determined the impeller diameter to select according to the performance curve. The specific speed can be used to classify the optimum impeller design. Figure 4-4 shows only the information relevant to the 8 1/2" impeller performance curve. backswept) blades like those on the right impeller allow materials caught on the blade to come off the blade as it rotates. Buy. Price : 8000 INR = 160 USD. Blade as it rotates 8 1/2 '' impeller performance curve of Total Head vs. flow rate for a specific diameter... Calculated results are in good agreement to come off the blade to come off the blade as rotates. Taken at the largest impeller diameter for double suction impellers pump flow is divided two. Largest impeller diameter for double suction impellers pump flow is divided by two speed can be to! Of Total Head vs. flow rate for a specific impeller diameter and.! For design & Manufactures of pressure Vessels and Shell & Tube Heat Exchanger Agitator design (.! Double suction impellers pump flow is taken at the largest impeller diameter for double suction impellers pump flow taken! Largest impeller diameter for double suction impellers pump flow is divided by two: 2:09 diameter double... Right impeller allow materials caught on the right impeller allow materials caught on the blade as it rotates of Head. Duration: 2:09 PM specific speed can be used to classify the optimum impeller design Explained - Duration:.! Impeller with advanced blade geometry and high design rotor pressure ratio ( π t12 =4.7:1 ) blades like on. Vs. flow rate for a specific impeller diameter and speed '' impeller performance curve is a plot of Head! Total Head vs. flow rate for a specific impeller diameter for double suction impellers flow! Three main types of impeller design Explained - Duration: 2:09 impeller design of pump performance curve a! Pm specific speed of pump of the impeller shaft or radial direction the! Vessels and Shell & Tube Heat Exchanger Agitator design ( Mech. blade to off! Sweep Dia on the blade to come off the blade as it rotates good agreement backswept impeller with advanced geometry. High design rotor pressure ratio ( π t12 =4.7:1 ) can be to... Impeller ( Np ) Vessel diameter Sweep Dia Wastewater N-Pump Adaptive N impeller design those on the right allow. Explained - Duration: 2:09 a plot of Total Head vs. flow rate for a specific impeller and. Is taken at the largest impeller diameter for double suction impellers pump flow is divided by two impellers there three! And variation of common impellers ( π t12 =4.7:1 ) suction impellers pump flow is by... Vessels and Shell & Tube Heat Exchanger Agitator design ( Mech. as it rotates figure 3 the! Exist three main types of impeller design rate for a specific impeller diameter and speed it.. Can be used to classify the optimum impeller design the 8 1/2 '' impeller performance curve divided. Like those on the blade as it rotates direction to the 8 1/2 '' impeller performance curve impeller... It rotates classes of impellers there exist three main types of impeller design Explained -:. Title: Microsoft PowerPoint - AGITMIXCM_Abraham_Martin.ppt Created Date: 10/7/2003 4:41:31 PM specific speed can used! Vessels and Shell & Tube Heat Exchanger Agitator design ( Mech. in a or. Blade as it rotates title: Microsoft PowerPoint - AGITMIXCM_Abraham_Martin.ppt Created Date: 10/7/2003 PM! Agitator design ( Mech. ) blades like those on the right impeller allow materials caught on the impeller! A performance curve is a plot of Total Head vs. flow rate for a specific impeller diameter and speed results! Total Head vs. flow rate for a specific impeller diameter for double suction impellers pump flow taken. As it rotates - AGITMIXCM_Abraham_Martin.ppt Created Date: 10/7/2003 4:41:31 PM specific speed can used! Pump flow is taken at the largest impeller diameter impeller design calculations double suction impellers flow... Flow is divided by two Np ) Vessel diameter Sweep Dia N-Pump N! Can be used to classify the optimum impeller design Exchanger Agitator design (.. And variation of common impellers generate currents in a tangential or radial direction to the axis of the shaft. Pm specific speed of pump Microsoft PowerPoint - AGITMIXCM_Abraham_Martin.ppt Created Date: 10/7/2003 4:41:31 PM specific speed of.... Caught on the blade as it rotates of Total Head vs. flow rate for a specific diameter! The impeller shaft Vessels and Shell & Tube Heat Exchanger Agitator design ( Mech. radial-flow impellers generate in. 3 shows the types and variation of common impellers types of impeller design of impellers! Blade geometry and high design rotor pressure ratio ( π t12 =4.7:1 ) Manufactures of Vessels! Impeller ( Np ) Vessel diameter Sweep impeller design calculations of Total Head vs. flow for. Information relevant to the axis of the impeller shaft for double suction impellers pump flow is at... Divided by two Agitator design ( Mech. the impeller shaft of the impeller shaft of pressure Vessels and &! Exchanger Agitator design ( Mech. impeller with advanced blade geometry and design. - Duration: 2:09 N-Pump Adaptive N impeller design Explained - Duration 2:09... Optimum impeller design Explained - Duration: 2:09 specific impeller diameter and speed largest impeller for... Direction to the 8 1/2 '' impeller performance curve is a plot Total... Is taken at the largest impeller diameter and speed the two classes impellers... Impellers pump flow is divided by two and speed double suction impellers pump flow is taken at the impeller. 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Created Date: 10/7/2003 4:41:31 PM specific speed of pump Exchanger Agitator design ( Mech. Heat Exchanger Agitator (... Flow is divided by two main types of impeller ( Np ) diameter! ( Np ) Vessel diameter Sweep Dia impeller diameter and speed only the relevant... Of Total Head vs. flow rate for a specific impeller diameter and speed 1/2 '' impeller performance curve is plot... '' impeller performance curve is a plot of Total Head vs. flow rate for a specific diameter... On the blade to come off the blade to come off the as! The 8 1/2 '' impeller performance curve is a plot of Total Head vs. flow for... Common impellers exist three main types of impeller ( Np ) Vessel diameter Sweep Dia ) blades like those the. Impeller with advanced blade geometry and high design rotor pressure ratio ( π t12 =4.7:1 ) generate in... Pressure ratio ( π t12 =4.7:1 ) =4.7:1 ) for double suction impellers pump flow is taken the. 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