121-01258-0000

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121-01258-0000

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Pumpworks 121-01258-0000 PWA-SP Series ANSI B73.1 Compliant Self-Priming Centrifugal Process Pumps, Model: PSP,4X4X10,2R1,DF,0TB0,CCS,STD. Group 2, Size 4 x 4 x 10, 4" Suction, 4" Discharge 150# Raised Face Flanged Connections. Threaded CS Impeller, Tapered Bore Cover, Drain & Flush Tap, No Bushing. CS Case, SS Shaft, Aramid Fiber Gasket, Teflon Seal, Oil w/ ISOMAG Lubrication. Bare Pump Only, Does Not Include Motor.

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Item: 121-01258-0000

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121-01258-0000

Base Model Number	PSP
Bushing	No Bushing
Case Gasket	Aramid Fiber
Casing Material	CS
Cover Type	Tapered Bore
Discharge NPT (Inches)	4"
Flange	150# Raised Face
Group	Group 2
Impeller Material	CS
Impeller Seal	Teflon
Impeller Style	Threaded

Lubrication	Oil w/ ISOMAG
Model Series	PWA Self Primer
Motor Shaft Material	SS
Part Type	Bare Pump
Pump Size	4 x 4 x 10
Quick Specs	PSP,4X4X10,2R1,DF,0TB0,CCS,STD
Size	MT
Suction NPT (Inches)	4"
Tap Connections	Drain & Flush
Type	No Sleeve

PWA ANSI Self Priming Process Pumps Information

Features & Benefits

1. Integrated Priming Technology

Unlike standard centrifugal pumps that require a foot valve or an external vacuum system to prime, the PWA-LF is an "all-in-one" solution.

Built-in Chamber: The casing features a large, single-component priming and air removal chamber.
Automatic Air Removal: It automatically evacuates air from the suction line by mixing it with the liquid in the casing, then separating and venting it through the discharge.
No "Add-ons" Required: Customers save money and space because they don't need air separators, check valves, or external priming devices.

2. Superior Lift & Performance

When sizing a PWA-SP, customers need to focus on two critical technical limits:

Static Lift: The PWA-SP is capable of an effective static lift of up to 20 feet.
Operating Range: It can handle capacities up to 1,250 GPM and heads up to 430 feet.
Intermittent Flow: It is ideal for sumps or tanks where the liquid level fluctuates, as the pump will automatically re-prime itself as soon as the suction line is submerged again.

3. The "Standard" PumpWorks Upgrades

Even though this is a specialized "Self-Primer," it still includes the premium PumpWorks standard features that competitors charge extra for:

Carbon Steel Construction: The casing is made of high-strength ASTM A216 Carbon Steel, which is much more resistant to rupture in freezing temperatures (due to retained priming fluid) than standard ductile iron.
Shaft Quality: An upgraded 316L Stainless Steel shaft is standard, preventing the corrosion issues common with 4140 steel.
Warranty: Every PWA-SP comes with the industry-leading 5-Year Unconditional Power Frame Warranty.

4. Crucial Installation & Operation Tips

Customers often make two common mistakes with self-primers. They should be aware of these before the first start-up:

"Dry" Start-Up Warning: A self-priming pump is not a dry-running pump. You must manually fill the pump casing with liquid once through the fill plug before the very first start. The pump then retains that liquid for all future "self-primes."
Suction Line Integrity: Because the pump creates a vacuum to lift liquid, the suction line must be 100% airtight. Even a tiny pinhole leak in the piping will prevent the pump from ever reaching its prime.
Draining in Winter: Since the casing is designed to hold liquid to remain primed, it must be drained in freezing weather if not in use, or the expanding ice will crack even a steel casing.

5. Shared ANSI Flexibility

The PWA-SP is designed to ANSI B73.1 dimensions.

Interchangeability: The "Power End" (bearings and shaft) is the same as the standard PWA. This means plants can share spare parts across both their standard and self-priming pump fleets, reducing inventory costs.

Benefit	PWA-SP	Standard Pump
Location	Can be above liquid source	Must be below liquid source
Equipment	Integrated priming	Requires foot valves/primers
Material	Carbon Steel Standard	Usually Ductile Iron
Maintenance	Minimal (No external valves)	High (Check valves fail often)

Would you like me to help you calculate the "Priming Time" for a specific pipe length, or help you check the NPSH (Net Positive Suction Head) for a high-lift application?

Performance Testing

Test Flows: Up to 7,500 GPM
Discharge Test Pressures: Up to 740 PSI
Supply Tank Rating: Full vacuum to 65 PSI
Electrical Capacity: 460 volt through 500 HP, 3600 RPM
Variable Frequency Drive (VFD): Precise speed control through 500 HP @ 460 volt

Typical Industries & Ideal Applications

Chemical/Petrochemical, Pulp and Paper, Food and Beverage, Oil and Gas, Primary Metals Manufacturing, Mining, Power Generation, Waste Treatment & General Industrial

Important Things to Remember

To ensure your PWA-SP lasts for decades, keep these two operational tips in mind:

The "One-Time" Fill: While it is "self-priming," it cannot be started bone-dry. You must fill the casing with liquid once before the very first startup.

Airtight Suction: Because this pump creates a vacuum to "lift" the liquid, even a pinhole leak in your suction piping will prevent it from priming. Ensure your intake lines are 100% sealed.

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Type	Title		Link
	PumpWorks PWA-SP Self Priming Pump Curves		View
	PWA SP Self Priming ANSI Pump Repair Parts Manual		View

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121-01258-0000

121-01258-0000

121-01258-0000