ITT BPHV Performance with Varying Speed for Centrifugal Pumps, Make the following calculation

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Goulds Pumps

PHV - Packaged Hydrovar Series

PERFORMANCE WITH VARYING SPEED FOR CENTRIFUGAL PUMPS

Fitting the electric pump with a variable speed drive makes it possible to vary the pump rotation speed, normally accor- ding to the system pressure parameter. Variations in electric pump speed result in modified performances according to the equivalence relations, called affinity laws.

Flow Rate

Q1

 

n1

 

 

 

 

 

Q2=

n2

 

Head

H1=

 

n1

 

2

 

 

 

H2

n2

 

 

P1

 

n1

 

3

 

 

 

Power

=

 

 

 

 

P2

n2

 

 

 

 

 

 

 

 

 

n1 = initial speed;

n2= speed required.

Q1 = initial flow rate;

Q2= flow rate required.

H1 = initial head;

H2= head required.

P1 = initial power;

P2= power required

Head

 

 

 

H

n1

 

 

H1

 

A

 

 

 

 

 

n2

 

 

H2

B

 

 

 

 

 

 

Q2

Q1

Q

 

 

 

Flow

Frequency ratios can be used instead of speed in practical applications, keeping 30 Hz as the bottom limit.

Example : 2-pole 50 Hz electric pump n1 =2900 (point A) Flow rate (A) = 100 l/min; Head (A) = 50m

By reducing the frequency to 30 Hz the speed is reduced to approx. n2 = 1740 rpm (point B) Flow rate (B) = 60 l/min; Head (B) = 18 m

The power of the new work point B is cut to about 22% of the initial power.

SIZING THE DIAPHRAGM TANK IN SYSTEMS WITH SPEED VARIATION

Variable speed booster sets need smaller tanks compared to traditional systems. Generally speaking, a tank with a capacity of just 20% of the nominal capacity of a single pump, expressed in gallons per minute, is needed. The gradual starting of the pumps controlled by the drive reduces the need to limit the number of hourly starts; the main purpose of the tank is to compensate for small system losses, stabilize the pressure and make up for pressure variations caused by sudden demand (fast acting valves).

Make the following calculation:

Set made up of three electric pumps, each with a maximum flow rate of 100 GPM, for a total capacity of 300 GPM. The volume required for the tank is 20 gallons. This is total capacity, not drawdown. Mount downstream of the check valves in discharge manifold.

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Contents Goulds Pumps Contents Goulds PumpsSSV Flow Main Components PHV Series constant pressure variable speed systemPart Numbering / Identification Codes PHV Series HV M 3 4Markets Served SpecificationsMarkets and Applications MUNICIPAL, COMMERCIAL, IndustrialIrrigation and Agriculture Applications Further information is available in the Hydrovar manual SV33 and 46 MULTI-STAGE Pumps Reference StandardsANSI/NSF 61 certified by CSA for potable drinking water Standard Optional Features Versions Hydrovar VersionsIntroduction Application Example MULTI-PUMP Cascade Noise Emission Levels Operating Characteristics and LimitsOperation Description 60 Hz 3500 RPM LpA dB ±4Selecting a SET Calculating the Flow RateFused Disconnect BOX Customer SuppliedInstall Power Supply Hydrovar VFD MotorMotor Data 3500 RPM, 60 HzPerformance with Varying Speed for Centrifugal Pumps Sizing the Diaphragm Tank in Systems with Speed VariationMake the following calculation Model 1SVB 6 Stage Variable Speed Performance Curves1SV Variable Speed Curve Ssvb 304SS Hydraulic DataModel 1SVB 9 Stage Npsh RModel 1SVB 15 Stage 2SV Variable Speed Curve Ssvb 304SS Model 2SVB 5 StageModel 2SVB 8 Stage Model 2SVB 13 Stage 3SV Variable Speed Curve Ssvb 304SS Model 3SVB 7 StageModel 3SVB 9 Stage Model 3SVB 13 Stage Model 4SVB 2 Stage US GPM Feet4SV Variable Speed Curve Ssvb 304SS Model 4SVB 4 StageModel 4SVB 7 Stage 33SV Variable Speed Curve SVB CI/316SS Model 33SVB 1/1 StageModel 33SVB 1 Stage Model 33SVB 2/1 Stage Model 33SVB 3/1 Stage 46SV Variable Speed Curve SVB CI/316SS Model 46SVB 1/1 StageModel 46SVB 1 Stage 2SV 3500 RPM Technical Data Pump Hydraulics / Motor Sizing1SV 3500 RPM 3SV 3500 RPM4SV 3500 RPM 33SV 3500 RPM46SV 3500 RPM 66SV 3500 RPMTechnical Data Maximum Inlet PressurePHV Packaged Hydrovar Series 1SVB TefcPHV Packaged Hydrovar Series 2SVB PHV Packaged Hydrovar Series 3SVB PHV Packaged Hydrovar Series 4SVB PHV Packaged Hydrovar Series 33SVB PHV Packaged Hydrovar Series 46SVB Npsh Technical Data Water Property Chart Cubic ft/lb @ 39.2ºF @ 60ºF @ 68ºF Lb/cubic ft Psi AbsPressure and Head Volumetric CapacityVolume LengthGoulds Pumps Page Engineered for life

BPHV specifications

ITT BPHV, short for ITT's Bacterial Purified Water and High Purity Valves, represents a breakthrough in the field of fluid control technology, particularly designed for applications requiring the highest standards of cleanliness and reliability. These valves are typically utilized in industries where the quality of fluid handling is crucial, such as pharmaceuticals, biotechnology, and food and beverage manufacturing.

One of the standout features of the ITT BPHV is its ability to handle both high purity and aggressive fluids without compromising system integrity or cleanliness. The design focus on valve components ensures that they are free from contaminants, which is essential for processes where even minute impurities can lead to significant quality issues.

The materials used in the construction of ITT BPHV valves are particularly noteworthy. They feature advanced polymers, stainless steel, and other corrosion-resistant materials that withstand the rigors of high-purity applications. These materials not only ensure durability and longevity but also meet stringent industry standards for safety and compliance.

Innovative technologies integrated into ITT BPHV valves enhance their performance. These include advanced actuation systems that allow for precise control and responsiveness, ensuring that the flow of fluids can be managed effectively, even in highly dynamic environments. Additionally, the valves are designed to facilitate easy maintenance, with features that allow for quick disassembly and cleaning without the need for specialized tools.

Another vital characteristic of ITT BPHV valves is their compact design, which maximizes space efficiency within installations. This is particularly beneficial in industries where real estate is at a premium and where large equipment can impede operational efficiency. The modularity of the valve design also means that it can be adapted easily to different system configurations.

Furthermore, ITT BPHV valves are engineered with safety in mind. They incorporate features such as fail-safe functionality and pressure regulation, providing operators with peace of mind during critical operations. The seamless integration of these valves into automated systems enhances productivity by enabling consistent and reliable fluid movement.

Overall, ITT BPHV stands as a pioneer in high purity fluid handling, offering cutting-edge technology and robust engineering to meet the demands of modern industries. With their focus on cleanliness, reliability, and operational efficiency, these valves are an essential component for any facility striving for excellence in fluid management.