Cat Pumps

341 Cat Pump 4 GPM / 15.1 LPM 1800 PSI 1/2" NPT(F) Inlet Port Size 3/8" NPT(F) Discharge Port Size 1725 RPM Belt, Clutch, Flexible Coupling and Bellhousing Drive Type(s) 316 Stainless Steel

$4,638.70 USD

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CAT Pumps Model 341 Stainless Steel Plunger Pump (4.0 GPM, 1800 PSI)

The CAT Pumps Model 341 is an industrial-grade, 5-Frame triplex (three-plunger rod) positive displacement pump, recognized globally for its reliability in high-pressure applications. Constructed with a 316 Stainless Steel manifold, 316SS valve assemblies, and durable solid ceramic plungers, the Model 341 is specifically designed for aggressive fluids, including reverse osmosis (RO), saltwater injection, and chemical transfer.

Rated for a maximum flow of 4.0 GPM and pressures up to 1800 PSI, this pump features CAT Pumps' signature triplex design for smooth liquid flow and low pulsation. The standard NBR (Buna-N) seals provide excellent service life up to $160^\circ\text{F}$ , with alternative seal options available for higher temperatures or chemical compatibility. This model uses a single-end crankshaft suitable for various drive options including direct drive, belt, or clutch.

Component Specifications and Performance

SPECIFICATION	DETAILS	CHECK	NOTES
Part Number	341		Base model, part of the 5-Frame series (311, 341, 351, etc.).
Pump Type	Triplex Plunger Pump		Positive displacement design for high efficiency and low pulsation.
Max Flow Rate	$4.0 \text{ GPM}$ ( $15.1 \text{ LPM}$ )		Flow rates are nominal and based on standard test conditions.
Max Pressure	$1800 \text{ PSI}$ ( $124 \text{ Bar}$ )		Maximum intermittent pressure rating.
Manifold Material	316 Stainless Steel (316SS)		Excellent resistance to corrosion in harsh environments.
Max RPM	$1725 \text{ RPM}$		Optimal speed for direct drive or pulley systems.
Max Fluid Temp	$160^\circ\text{F}$ ( $71^\circ\text{C}$ )		Based on standard NBR (Buna-N) seal configuration.
Inlet Port Size	$1/2 \text{ in}$ NPT(F) (x2)		Dual inlet ports for flexible piping.
Discharge Port Size	$3/8 \text{ in}$ NPT(F) (x2)		Dual discharge ports for system versatility.