These diaphragm pumps meter a consistent amount of liquid within ±2% of the maximum flow. Often used to pump water-treatment chemicals, cleaning fluids, and electropolishing solutions, they have an adjustment dial that alters flow rate in 2% increments of the maximum flow. Pumps are self-priming and create suction to draw liquid upward. They can run dry but are not for use with solids.

Repair Kits—Repair kits include a pump head assembly, a diaphragm, valves, and seals.

These pumps can be used with pressures four times higher than standard pumps. An adjustment dial lets you alter flow rate in 2.5% increments of the maximum flow without the hassle of changing tubing. Often used in boiler feed systems and water treatment, they're compatible with chemicals such as cleaning fluids and acid-washing solutions. Pumps are self-priming and create suction to draw liquid upward. They can run dry.

Rated for continuous use, this diaphragm pump is often used to move caustics such as antifreeze and salt water. Mount it in any position, even upside down. It is typically used for low-flow spraying, draining, and washdown applications. The pump is self-priming, which means it creates a suction force to draw liquid upward. Pump can run dry and does not require an initial fill, so it’s a good choice for applications without a constant flow of liquid. Do not use with solids.

For high-volume chemical sampling and draining, these pumps have a powerful motor that enables them to move 2,592 gallons of liquid per day. They're commonly used with ammonia, acid-washing solutions, and cleaning fluids. Motor is open dripproof (ODP) for use in clean, dry, and well-ventilated environments. Pumps are self-priming and create a suction force to draw liquid upward. Mount up to 15 feet above your liquid source. They can run dry. Do not use with solids.

Dispense precise amounts of fluid from a syringe. Commonly used in chemical and pharmaceutical research, fiber production, and equipment calibration, these pumps maintain a steady flow rate for accurate filling and measuring. Use the color touchscreen to set parameters such as flow rate, force, and volume; schedule start and stop times; and create and save custom operations. Pumps work with glass, plastic, and stainless steel syringes from 0.5 µl to 60 ml. Mount horizontally or vertically; the touchscreen rotates.

Commonly used in mining, wastewater treatment, and other systems that require large-diameter hose, these pumps have flanged hose connections. They are compatible with chemicals such as cleaning fluids, acid-washing solutions, and detergents. Pumps have a reverse switch that allows flow in either direction. They are self-priming and create suction to draw liquid upward. They can run dry.

Use these diaphragm pumps for high-pressure output of antifreeze, hydraulic oil, and motor oil. They have an internal relief valve to prevent pressure buildup. The adjustment dial alters flow rate in 1% increments of the maximum flow. Pumps have a totally enclosed fan-cooled (TEFC) motor for use in dusty, dirty, and damp environments. Do not run dry or use with solids.

With a footprint that's only a few inches in any direction, these diaphragm pumps fit into compact systems to dispense small amounts of acids, cleaning fluids, and other chemicals. They're often used in sterilization, photochemical, and water treatment systems. Choose from pumps with either a 4-20mA or 1-5V DC input signal that controls the flow rate.

Note: Pumps must be filled with liquid before use. They need a constant flow of liquid and cannot run dry.

Automatically control output from a distance using a variety of analog and digital signals, including 4-20mA and external pulse signals. Pumps can also be controlled manually, run on a schedule, or set to cycle on and off. View flow rate on the LED display. These pumps handle pressures four times higher than standard pumps. They meter a consistent amount of liquid within ±1% of the maximum flow. Often used in boiler feed systems and water treatment, they're compatible with chemicals such as cleaning fluids and acid-washing solutions. Pumps are self-priming and create suction to draw liquid upward. They can run dry.

Install these pumps in a panel cutout. Often used in food and beverage, pharmaceutical, and lab applications, they dispense small amounts of liquid at a set rate. Pumps can be wired to a switch for manual operation, or a PLC for automated equipment. The removable pump head includes an intake tube that quickly connects to your line with barbed fittings (not included). To change lines, disconnect tubing and twist and pull the head off the motor. Then twist on a replacement head (sold separately). Pumps come in three colors for easy identification or to match your existing equipment. All are self-priming and create suction to draw liquid upward. Mount pumps up to 28 ft. above your liquid source. They can run dry.

An adjustment screw lets you increase or decrease flow rate without the hassle of changing tubing. Often used in boiler feed systems and water treatment, these pumps are compatible with chemicals such as cleaning fluids and acid-washing solutions. Pumps are self-priming and create suction to draw liquid upward. They can run dry.