Details

The ES-CP41 4-inch pump by ESI pairs a Cornell Pump and Kubota diesel engine for power, performance, and durability without compromise.

The STX-Series self-priming pump by Cornell is durable, reliable, and easy to maintain with an industry leading efficiency rating. It features ductile iron construction, patented Cycloseal® sealing system, and a uniquely designed volute for best performance. Driven by a Kubota diesel engine with a maximum shaft power of 24.8hp, this 4-inch pump set delivers a 900+ gpm flow rate with 3-inch solids handling and a 90-foot max head.

The ES-CP41 is available in ESI-built skid-mounted and trailer-mounted options. Both Arctic Tough configurations include built-in 25-gallon fuel tanks.

Pump

• Cornell STX-Series premium efficiency, self-priming pump
• Ductile iron construction
• Heavy-duty bearings with separate oil reserve
• External seal leakage monitor for dual-bearing protection
• Back pull out design for ease of maintenance
• Self-cleaning adjustable wear plate
• Easily replaceable suction check valve
• Shimless impeller

Engine

• Kubota V1505 or V1703 (ES-CP40), variable speed diesel engine
• DSE control panel for ease of operation and engine speed monitoring
• Racor fuel and water separator

Skid/Trailer

• Rugged, Arctic Tough designs by ESI
• 25-gallon built-in fuel tank

Specifications

Pump
Pump	Cornell 4STX-EM4
Suction	4″ 125# flangeASTM A536 Grade 65-45-12 ductile iron suction
Discharge	4″ 125# flange
Max flow	900 gpm
Max head (lift)	90′ (27.4 m)
Max solids size	3″ (76mm)
Max speed	2100 rpm
Impeller	Semi-open design, 2 vane3″ Spherical solids handling capabilityASTM A536 Grade 100-70-03 ductile iron
Pump and drive end bearings	Radial bearing single-row ball and thrust bearing double-row ball
Bearing house material	ASTM A48 Class 30/35 gray iron
Shaft material	1144 Stress-proof steel chromed and gray iron
Volute casing	ASTM A536 Grade 65-45-12 ductile ironTangential discharge with cleanoutClockwise rotation (viewed from driven end)
Mechanical seal	Single-type sealTungsten carbide vs. silicon carbide seal facesViton elastomers300 Series stainless steel hardware and spring
Engine
Engine	Kubota V1505 or D1703 (ES-CP40), variable speed
Max shaft power	24.8 hp
Fuel type	ULSD
Fuel capacity	25 gal
Fuel consumption	1.3 gph @ 2000 rpm
Dimensions
Skid-mounted weight	Dry: 1523 lb (691 kg) Wet: 1722 lb (781 kg)
Trailer-mounted weight	Dry: 1743 lb (791 kg) Wet: 1941 lb (880 kg)