Cat Pump 1051 Plunger Pump 15 Frame – 316 Stainless Steel Triplex Pump End
The Cat Pump 1051 is a 15 Frame triplex plunger pump built for operations that ask a pump to run hard and keep running. Three solid ceramic plungers move inside a 316 stainless steel manifold, pushing up to 10 GPM at pressures reaching 2200 PSI while turning at a maximum of 958 RPM. Because the plungers are ceramic rather than plated steel, they shrug off the abrasion and corrosion that shorten the life of lesser pumps, which is why the 1051 turns up in reverse osmosis skids, deionized water loops, chemical injection packages, and wash systems handling water that is anything but clean.
What makes the 1051 worth specifying is the liquid end. Both the manifold and the valve assemblies are 316 stainless steel, and the inlet and discharge valves are spring-loaded closed and hydraulically opened, so flow stays even through the full pumping cycle instead of surging with each stroke. Standard NBR (Buna-N) seals and O-rings cover most water and mild chemical duties, and the pump ships as a bare pump end with a 30 mm shaft ready for belt or clutch drive, letting you match the motor or engine to your own duty cycle rather than accepting someone else's.
Users put this pump to work across a wide range of industries, from hydrostatic testing and pipeline flushing to misting and fogging, industrial cooling, food processing washdown, and wellhead service. A 3/4" NPT(F) inlet and 1/2" NPT(F) discharge make plumbing straightforward, and the 15 Frame crankcase shares parts and service procedures with the rest of the 15 Frame family, so maintenance stays familiar and rebuild kits stay easy to source.
Key Features
- Triplex positive displacement reciprocating plunger pump design for smooth, consistent flow
- 316 stainless steel manifold and 316 stainless steel valve assemblies for corrosion resistance
- Solid ceramic plungers resist abrasion, scaling, and chemical attack
- Spring-loaded closed, hydraulically opened inlet and discharge valves
- Standard NBR (Buna-N) seals and O-rings suited to water and mild chemical service
- Sold as a bare pump end for belt drive or clutch drive configurations
- 15 Frame crankcase with proven parts commonality across the 15 Frame family
- Serviceable in place with standard seal and valve kits
Applications
- Reverse osmosis, desalination, and membrane feed systems
- Deionized and demineralized water transfer
- Industrial cleaning and high pressure washdown
- Hydrostatic testing and pipeline flushing
- Misting, fogging, humidification, and dust suppression
- Industrial cooling and evaporative cooling systems
- Chemical injection and metering in oil and gas service
- Food and beverage processing sanitation
- Agricultural spraying and greenhouse systems
- Car wash and fleet wash equipment
Specifications
- Model: 1051
- Frame: 15 Frame
- Pump Type: Triplex plunger pump, positive displacement, reciprocating
- Maximum Flow: 10 GPM (37.9 LPM)
- Maximum Pressure: 2200 PSI
- Maximum RPM: 958
- Maximum Horsepower: 15 HP
- Inlet Port Size: 3/4" NPT(F)
- Discharge Port Size: 1/2" NPT(F)
- Shaft Diameter: 30 mm
- Drive Type: Belt drive or clutch drive
- Manifold Material: 316 Stainless Steel
- Valve Material: 316 Stainless Steel
- Plunger Material: Solid Ceramic
- Seals and O-Rings: NBR (Buna-N)
- Crankcase Oil Capacity: 42 oz
- Maximum Inlet Temperature: 160°F
- Dimensions: 16.28" x 12.99" x 6.44"
- Configuration: Bare pump end, no motor included
Frequently Asked Questions
Q: Does the Cat Pump 1051 come with a motor or engine?
A: No. The 1051 ships as a bare pump end only. You select and mount your own electric motor, gas engine, or hydraulic drive using a belt or clutch arrangement matched to the 30 mm shaft and your required speed.
Q: What is the difference between the 1051 and the 1050?
A: The two share the same 15 Frame crankcase and performance envelope, but the 1051 uses a 316 stainless steel liquid end where the 1050 uses a different manifold material. Choose the 1051 when the pumped fluid is corrosive, treated, or must stay free of contamination.
Q: Can the 1051 run dry even briefly?
A: No. Plunger pumps rely on the pumped liquid to lubricate and cool the seals, and running dry will damage them within seconds. Always keep the inlet flooded and confirm supply before starting.
Q: What speed should I drive the pump at for lower flow?
A: Flow is proportional to shaft speed, so pulley sizing lets you dial in a lower GPM while staying below the 958 RPM maximum. Running slower generally extends seal and valve life, provided the pump stays within its rated pressure.
Q: How often does the crankcase oil need to be changed?
A: Change the oil after the initial break-in period and then on a regular interval based on duty cycle and operating temperature. Check the level through the sight glass before each run and top up with the manufacturer-specified pump oil.
CLRMarine
