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Primary specializes in a complete line of bellows pumps and accessories, including ACCUDRAW Graduated Calibration Cylinders; TOP VALVE Back Pressure and Pressure Relief Valves; ACCU-PULSE Pulsation Dampeners; PFS Injection Quills and Corporation Stops; and ACCU-VENT Automatic Degassing Valves. Primary has the experience and capabilities to provide you with the solutions you're looking for.
Yamada® Corporation has been a leading producer of fluid handling products for over 60 years. As a leader in pneumatic pumping technology, Yamada® is known in industries worldwide for its innovative products, superior quality and unmatched reliability. Yamada's ISO 9001 certification ensures quality procedures for manufacturing bellows pumps, dampeners and more.
Oil-Rite began manufacturing lubrication equipment in 1933. Since then, our reputation and product line has grown and it remains dedicated to the design and manufacturing of lubricating solutions. At Oil-Rite you will find goods such as valves, bellows pumps and spray machinery. Find high quality lubricators as well as the patented PurgeX® pumping device. Call Oil-Rite today!
As one of the oldest manufacturers of bellows pumps, Randolph has maintained a loyal following by delivering "rugged, reliable and simple to use" products. Randolph machines all the components of its pumps to its exacting specifications and extrudes its own tubing. The Randolph pump can be found working in industries such as printing, food, pharmaceutical, nuclear and wastewater.
For over 50 years, Madden Manufacturing, Inc. has manufactured bellows pumps for industrial accessories. Madden is a supplier of many precision crafted products and provides quality, efficiency and competitive prices. Madden's mission is to produce simple, rugged industrial quality pumps and steam machinery that will provide excellent performance and value for our customers.
Moyno, Inc. is a leading manufacturer of Moyno® progressing bellows pumps, cavity pumps, sludge pumps, sanitary pumps, grinders and controls. The company`s worldwide stocking distribution network serves a wide range of industries including wastewater treatment, chemical, food, pharmaceutical and oil & gas transportation. Moyno is always the right solution!
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Industry Information
Bellows Pump
The first part of a bellows pump mechanics are the rotations or oscillations of an attached motor shaft extending the bellows, creating a vacuum effect which draws fluid in from a reservoir. The inlet valve functions only in one direction, as does the outlet valve in order to eliminate contamination or inaccuracy due to backflow. The continued movement of the motor shaft then retracts the bellows, compressing the material and displacing the fluids which are exhausted through the aforementioned outlet valve. A relatively simple process, bellows pumps can be manual or automatic and offer precision fluid metering with clean and quite operation. Double and triple bellows systems further the possibilities of this particular type of pump as they allow the handling of hazardous, toxic, corrosive and abrasive materials in addition to fluids such as water, oil and medicine. Introducing a precise amount of fluid with each cycle, these metering systems provide a consistent amount of fluid into a continuous flow stream ensuring the homogeneity of the final process stream. With the capacity to operate for over 10,000 continuous hours without particle shedding or other contamination, bellows pumps offer limitless metering possibilities.
The simple operation of the bellows pump is accompanied by a fairly simple design which is often recognizable in medical apparatus which use the pump to carefully and continuously deliver doses to patients intravenously. The bellows themselves act as the pump head, or the compartment into which the intake fluid enters. The drive shaft is attached to one end of the bellows, with the other connected to a stable plate positioned in the flow line. On one side of the stationary end is the intake valve while the outlet is on the opposite. While the bellows themselves may be made through electroforming, chemical deposition and mechanical forming; welding together stamped contoured diaphragms is the most popular production method for metal bellows while plastics may be stitched, sewn or molded. Common metals include aluminum, stainless steel, copper and titanium. Plastic materials such as laminated polyester, treated synthetic fabric, rubberized fabric and polyvinyl chloride are used as well. The check valves are made of similar materials as they too must be suited to the composition of the liquid being metered. The motor is the most variable aspect of the bellows pump as it may be electric or fuel based, or altogether lacking as foot or hand pedals may also be used to enact bellow extension and retraction, though not in timed applications. Additional considerations for bellows pumps include operating pressure, flow and temperature ranges as well as stroke, size and efficiency.
