Pre-defined Subcategories and Options

The SKB offers pre-defined subcategories which  trigger specific logic to be used in the Selector. Many of the subcategories are specific to the "Product Type" that the product line represents. Pre-defined subcategories are accessed by clicking in the first cell of any row under the Supplier ID column within the Product Line Options Subcategory Table. (A drop down menu will appear). Although these are "pre-defined" and trigger a specific set of logic, their descriptions are not, this allows any naming convention to be used,  however always keep in mind the data they represent.  A pre-defined subcategory which is displayed in blue font,  indicates that it's options will expect an input value from the Selector user. To see and example click here Below is a list of the available pre-defined subcategories for each product type.

All Product Types

• SC-Mtl  - This is a mandatory subcategory used for casing material.

• SC-DriverSize  - This is available for use if a driver sizing specification of "System Curve" is required.  This specification will size the driver according to the power required where the system curve intersects with the rated head curve.

Vertical Pumps

• SC-PpType -  This subcategory houses the different vertical "pump type" options that the user can choose from during the selection process. The available options are: deep well, wet pit, can, submersible, bowl only, and sump. (Please note that the sump option can only be used by itself with none of the other options in the list.) With the use of compatibility rules, these options can be used to control the product line options which are applicable to the pump type selected. See the SKB example below.
  
  
  This example shows five pump type options populated: Wet pit, Can/barrel, Submersible, Bowl only, & Well. These options will be offered in a drop down selection menu for the user during the selection process.

• SC-HeadStr  - This subcategory is used to house the different head strategy options that the user can select. Five head strategy options are available. See the SKB example below. To see how it's presented in the Selector, click here.
  
  
  This SKB example shows different options for head strategy. These options are offered in a drop down selection menu for which the user can define during the selection process.
  
  Options:
  HeadStr-Disch - This will calculate the required head based on the user specified head being measured at the discharge nozzle centerline.
  HeadStr-Mount - This will calculate the required head based on the user specified head being measured at the mounting surface. (Typical underside of discharge head).
  HeadStr-LLL - This will calculate the required head based on the user specified head being measured at the user specified low liquid level.
  HeadStr-Bowl - This assume that user specified head is measured at the bowl.
  HeadStr-Pump - This assumes that the user’s specified head represents the pump performance based on HI. The use of this option will typically require that the Selector’s pump performance calculation option to account for static lift from LLL be unchecked and disabled. User privileges can be setup to uncheck and disable the option by default.

• SC-LgthStr  - This subcategory houses the length strategies offered to the user during the selection process. The Selector will use the selected length strategy to calculate the optimum pump length. Options for length strategy include: LgthStr-Sump (sump depth), LgthStr-Pump (pump length), LgthStr-Col (column length), LgthStr-LLL (low liquid level), LgthStr-Can (can/barrel length), LgthStr-NPSH (As required for NPSHa), LgthStr-Suct (As required for suction elevation), and user defined.
  
  In addition, flexibility is provided for the LgthStr-LLL, LgthStr-NPSH, LgthStr-Suct, or any "user defined" option by allowing additional criteria to be included when sizing the column (and can) length.  For these options, additional sizing criteria may include one or more of the following: Also size for LLL (Low Liquid Level), Also size for NPSHa (Net Positive Suction Head Available), Also size for suction elevation. Checkboxes are provided to define which criteria to include.
  
  See the SKB example below. To see how this is presented in the Selector, click here.
  
  
  This example shows 12 different options populated for length strategy.
  Notice:
       • Compatibility rules are being used to control the applicability based on pump type.
       • The options which are sizing the column (and can) length using additional criteria are defined by the checks in the Also size for LLL, Also size for NPSHa, and Also size for Suction elevation cells.

• SC-PressStr  - This subcategory houses different pressure strategy options for which the Selector user can define during the selection process. See the SKB example below. To see how this is displayed in the Selector, click here.
  
  
  This image shows the options available for pressure strategy. (PressStr-MaxRatedMCSF2EOC & PressStr-MaxMaxSO2EOC are currently NOT supported).
  
  Options:
  PressStr-MaxRatedSO2EOC - This will calculate maximum working pressure based on the maximum head generated at the rated impeller diameter. This is the default condition.
  PressStr-MaxRatedMCSF2EOC - Not supported.
  PressStr-MaxMaxSO2EOC - Not supported.
  PressStr-Rated-1 thru 4 - This will calculate maximum working pressure based on the rated head for the rated impeller diameter multiplied by the factor specified in the "Factor" column field. For example: a factor value of 1.10 will calculate the maximum working pressure based on the rated head at rated diameter plus 10%. Thus the description "Pressure at rated conditions + 10.0%

• SC-NPSHStr  - This subcategory houses the different NPSH strategy options for which the Selector user can define during the selection process. See the SKB example below. To see how this is presented in the Selector, click here.
  
  
  This image shows the options available for NPSH strategy.
  
  Options:
  NPSHStr-Suction - This will calculate NPSH available at the first stage impeller eye based on the user specified NPSH measured at the suction nozzle centerline.
  NPSHStr-Mount - This will calculate NPSH available at the first stage impeller eye based on the user specified NPSH measured at the mounting surface. (typically the underside of the discharge head).
  NPSHStr-LLL - This will calculate NPSH available at the first stage impeller eye based on the user specified NPSH measured at the user defined Low Liquid Level.
  NPSHStr-Bowl - This assume that user specified NPSH is measured at the first stage impeller eye.

• SC-CanSuctionMinDist  - This subcategory houses the option(s) allowing the KE and/or user to drive the suction elevation calculation. The calculation will be driven basis the reference datum and the quantity of can diameters defined for the option(s).  
  
  The suction elevation will be calculated as follows:
  1. If the subcategory exists:
       • The minimum distance = can diameter * specified quantity of can diameters as measured from the specified datum (mounting surface or suction bell)
  2. If the subcategory does not exist:
       • For suction nozzles above the mounting surface, the minimum distance from the suction bell to the suction nozzle centerline will be 4 times the can diameter (inner).
       • For suction nozzles below the mounting surface, the minimum distance from the suction bell to the suction nozzle centerline will be 2 times the can diameter (inner).
  
  Shown below are some possible option examples:
  
  
  
  Note: The low density option is shown to capture API market requirements. The minimum 4D above the suction bell lip from the centerline of the suction nozzle does not apply, as lower specific gravity liquids do not require a run minimum length like water does.
   

• SC-LgthVal  - This subcategory houses the different length value options which the Selector user can define during the Selection process. The option presents the user a text box in the Selector to allow input of the "length". What "length" means is determined by the user's selection of "length strategy". This information is used in the calculation of total pump length. For example: If the Selector user defines the length strategy as "sump" the sump length should default to 10 ft and also allow the user to change the value to meet his particular conditions. In this case the Option ID "LgthVal-1 was created with Compatibility rule "NOT LgthStr-Suct" (remember the length strategy is sump) and it's default value is populated with 10ft. Therefore any length strategy that the user selects, other than LghStr-Suct,  the "length" default value is populated as 10 ft. See the SKB example below. To see how it's presented in the Selector, click here .
  
  
  This SKB example shows 3 possible length value options. LghtVal-1 option for instance pertains to all length strategies except for "Suction" and will use a default value of 10ft. The description field must be populate but are not used in the Selector, the Selector displays "Length" regardless of the descriptions populated.
   

• SC-VelCan  - This subcategory houses the options representing maximum can liquid velocities. The options present the user a text box in the Selector to allow input of the maximum can liquid velocity. For each option a default velocity is defined which will be used if the user doesn't input a value. The Selector will use the velocity value in sizing the can diameter. See the SKB example below. To see how it's presented in the Selector, click here .
  
  
  This example shows the can velocity option VelCan-Std with a default value of 5.00 [ft/s].
  Note: The description field must be populate but are not used in the Selector. The Selector displays "Can liquid velocity limit" regardless of the descriptions populated.

• SC-WellDia  - This subcategory houses the options representing the maximum well diameter. The options present the user a text box in the Selector to allow input of the maximum well diameter to met their requirements. If necessary, a default well diameter can be populated for the options, normally this will be set to 0. See the SKB example below. To see how it's presented in the Selector, click here .
  
  
  This example shows an option for well diameter. This option is for a "standard" well diameter to be defined by the Selector user during the selection process. The description field must be populate but are not used in the Selector, the Selector displays "Well diameter" regardless of the descriptions populated.

• SC-LLL  - This subcategory houses the options representing the low liquid level . The options present the user a text box in the Selector to allow input of the low liquid level. This value is used to determine the static lift required in applications where the liquid level is below the mounting service. For each option defined a default value is defined which will be used if the user doesn't input a value. See the SKB example below. To see how it's presented in the Selector, click here .
   
  
  This SKB example shows one option defined for Low Liquid Level with a default value of 0. The description field must be populate but are not used in the Selector, the Selector displays "Low liquid level" regardless of the descriptions populated.

• SC-FricCol  - This subcategory houses the options representing column friction rate limits. The options present the user a text box in the Selector to allow input of the column friction rate limit. For each option a default rate limit is defined which will be used if the user doesn't input a value. The friction rate limit is entered as a percentage based on ft/100. The Selector uses the value in sizing the column diameter. See the SKB example below. To see how it's presented in the Selector, click here .
  
  
  This SKB example shows 2 column friction rate limit options. The FricCol-Std option is the standard column friction rate with a default friction limit of 7%. The FricCol-Hi option default value of 5% will be used when API610 hydraulic selection standards are required by the user, this is driven by the compatibility rule. The description field must be populate but are not used in the Selector, the Selector displays "Column friction rate limit" regardless of the descriptions populated.
  
   

• SC-ElevSuct - This numeric subcategory houses the option representing the suction nozzle location. The option presents the user with an input box in the Selector to specify the distance from the bottom of the mounting plate to the centerline of the suction nozzle. (The value is positive when above ground and negative when below ground.) This distance is added to the distance of (2xbarrel diameter + the distance of the end of barrel to the suction bell) . The total is checked against the barrel length for which it can't exceed. A default length can be defined which will be used if the Selector user doesn't input a value. See the SKB example below. To see how it's presented in the Selector, click here .
  
  
  This SKB example shows the suction elevation option with a default of 12 inches (below mounting surface).

• SC-ElevDisch - This numeric subcategory houses the option representing the discharge nozzle location. The option presents the user with an input box in the Selector to specify the distance from the mounting surface to the centerline of the discharge nozzle. (The value is positive when above ground and negative when below ground.) A default length can be defined which will be used if the Selector user doesn't input a value. See the SKB example below.  
  
  
  This SKB example shows the discharge elevation option with a default of 12 inches (above the mounting surface).

• SC-VelSuct  - This presents the user a text box in the Selector to allow input of the maximum suction nozzle liquid velocity. This is used in sizing the suction nozzle diameter.
  
  This subcategory houses the options representing maximum suction nozzle liquid velocities. The option/options present the user a text box in the Selector to allow input of the suction nozzle liquid velocity limit. For each option a default velocity is defined which will be used if the user doesn't input a value. The Selector will use the velocity value in sizing the suction nozzle diameter. See the SKB example below. To see how it's presented in the Selector,
  
  
  This example shows the two can velocity options. The Vel-Suct-VCHead option with a default value of 6.00 [ft/s] is used for a specific type of head design. The Vel-Suct-Other option with a default value of 4.00 [ft/s] is used for all other applications.
  Note: The description field must be populate but are not used in the Selector. The Selector displays "Suction nozzle liquid velocity limit" regardless of the descriptions populated.

• SC-ThrustLimit  – For applications making use of the thrust balancing functionality, this numeric input box is used to define the thrust limit of the thrust bearing. If a default value is not defined in the SKB for this input box, the Selector will show a blank input field and not upgrade the quantity of thrust balanced stages. Additionally, if the Selector user enters a value of 0, no upgrade is performed. Otherwise, the Selector will upgrade the quantity of thrust balanced stages until an acceptable thrust is achieved. This is determined by the Thrust balanced stages table under Vertical Pump Data.

• SC-ThrustLimitMargin  – For applications making use of the thrust balancing functionality, this is the margin that the Selector will use to calculate the actual allowable thrust. For example, if the maximum allowable thrust is 7000 lb, then the actual allowable thrust = 7000 * (1 – thrustMargin). A “factor” column will be provided for options in this list. (Option description: “20%”, factor: 1.2) The KE can define one or multiple options.

• SC-ThrustLimitCriteria  - For applications making use of the thrust balancing functionality, this defines whether the Selector should use the rated thrust or the maximum thrust when evaluating thrust acceptability. The options are ThrustLimitCriteria-Max and ThrustLimitCriteria-Rated.

Positive Displacement Pumps

PD pumps are not currently supported in this version of the help file.

• SC-SpeedinPick

• SC-SpeedinSpec

• SC-FlowMax

• SC-FlowMin

• SC-GearRatio

• SC-GearTorqueLimit

• SC-Gear

• SC-DriveType