VER. 1 DIAPHRAGM PUMP-29.1 GPM - John Blue DP-291.1

The John Blue DP-291.1 is a high-pressure diaphragm pump designed for agricultural and industrial applications, including boom sprayers and poultry house washers. It features a three-diaphragm design, ensuring smooth liquid flow with minimal pulsation. The pump's fluid end-housing components are made of anodized aluminum, providing enhanced durability and resistance to corrosion. Stainless steel valves with a unique spherical section-shaped design offer perfect sealing, while diaphragms constructed from chemical-resistant elastomers extend the pump's lifespan, even when handling aggressive chemicals. The pump operates efficiently at a maximum flow rate of 29.1 gallons per minute (GPM) at 29 PSI, with a maximum pressure of 725 PSI and a maximum speed of 550 RPM. It requires a maximum power of 14 horsepower and can handle temperatures up to 140°F. The suction hose diameter is 1-1/2 inches, and the discharge hose diameter is 3/4 inch NPT. The pump weighs 55.6 pounds and utilizes 30 SAE lubricating oil. It features a through shaft with 1-3/8-inch splines on both ends. For optimal performance, the recommended pressure regulator is the SC-1480-3. An optional model, the DP-291.1-GRI, includes a gearbox for 1-inch shaft engines and the SC-1480-3 regulator. The pump's design includes a unique pulsation damper system that provides dampening on 32 circuits, reducing vibrations and allowing for smoother operation. Additionally, the crankshaft stroke is reduced to increase diaphragm life by minimizing stress on the diaphragms. The pump's construction ensures chemical resistance and longer life, with parts in contact with chemical products made from die-cast aluminum covered with a special corrosion-proof treatment. Two piston rings for each piston increase diaphragm efficiency, and the pre-set diaphragm bolt and diaphragm washer are made from 316 stainless steel, ensuring chemical resistance and longer life of the pump.

• Model: DP-291.1
• Manufacturer: John Blue Company
• Type: High-Pressure Diaphragm Pump
• Flow Rate: 29.1 GPM at 29 PSI
• Maximum Pressure: 725 PSI
• Maximum Speed: 550 RPM
• Maximum Power: 14 HP
• Maximum Temperature: 140°F
• Suction Hose Diameter: 1-1/2 inches
• Discharge Hose Diameter: 3/4 inch NPT
• Weight: 55.6 pounds
• Lubricating Oil: 30 SAE
• Shaft Design: Through shaft with 1-3/8-inch splines on both ends
• Recommended Pressure Regulator: SC-1480-3
• Optional Model: DP-291.1-GRI (includes gearbox for 1-inch shaft engines and SC-1480-3 regulator)
• Pulsation Damper System: Dampens on 32 circuits to reduce vibrations
• Crankshaft Stroke: Reduced to increase diaphragm life by minimizing stress
• Construction: Die-cast aluminum with corrosion-proof treatment for chemical resistance
• Piston Rings: Two per piston to increase diaphragm efficiency
• Diaphragm Bolt and Washer: Made from 316 stainless steel for chemical resistance and longer life

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