Stainless Steel Air Operated Double Diaphragm Pumps

Durable stainless steel construction with good corrosion resistance for demanding industrial fluid transfer

Stainless steel air operated double diaphragm pumps are widely used for transferring industrial fluids where mechanical strength, durability, temperature resistance and cleanability are important. Their robust metal construction makes them suitable for demanding applications involving chemicals, solvents, paints, coatings, oils, wastewater and process liquids. Depending on the selected pump model and material configuration, stainless steel AODD pumps can handle fluids ranging from low-viscosity liquids to viscous products and mixtures containing suspended solids. In chemical processing plants, stainless steel diaphragm pumps are commonly installed for drum unloading, tank-to-tank transfer, chemical distribution, batching, circulation and filtration. They can transfer compatible solvents, resins, additives, cleaning agents and other process chemicals without using a rotating mechanical seal. This reduces the risk of leakage associated with conventional shaft-seal designs. Before selecting a pump, the compatibility of the stainless steel body, diaphragms, valve balls, valve seats and seals must be checked against the fluid’s chemical composition, concentration and operating temperature. Paint, coating, ink and adhesive manufacturers use stainless steel AODD pumps to transfer raw materials and finished products between storage tanks, mixers, filters and filling equipment. The air-operated design allows the flow rate to be adjusted by regulating the compressed-air supply. These pumps can handle variations in viscosity and are suitable for intermittent production processes. For materials that may settle or cure, the pump and pipeline should be cleaned according to the product supplier’s recommended procedure after operation. Stainless steel AODD pumps are also used in oil and gas, general manufacturing and equipment-maintenance applications. Typical duties include transferring lubricants, waste oil, compatible fuels, contaminated liquids and cleaning fluids. Their self-priming capability is useful for emptying drums, sumps and tanks, while dry-running capability provides additional protection during intermittent transfer. Actual suction performance depends on the pump size, fluid viscosity, installation arrangement and operating conditions. In water and wastewater treatment facilities, these pumps can be used for chemical transfer, filter-press feeding, sludge handling, sump drainage and the movement of liquids containing suspended particles. Because the pumped fluid is separated from the compressed-air system by flexible diaphragms, the pump does not require a direct-drive motor or shaft passing through the fluid chamber. This design supports reliable operation in wet, dirty and difficult industrial environments. Certain stainless steel diaphragm pump configurations may also be used for food, beverage, pharmaceutical or hygienic processes when the complete pump design, surface finish, elastomer materials, connections and cleaning procedure meet the applicable requirements. A standard industrial stainless steel pump should not automatically be considered hygienic or food-grade. Users should confirm the required certification and specifications before selecting a pump for sanitary service. OVELL stainless steel AODD pumps are available in several connection sizes and material combinations for different flow rates and operating requirements. Diaphragm, ball and seat options can be selected according to chemical compatibility, temperature, viscosity and solids content. Proper pump sizing helps maintain stable flow, reduce excessive cycling and improve diaphragm service life. Before installation, verify the required flow rate, discharge pressure, air pressure, connection size and fluid characteristics. The compressed-air supply should be clean and correctly regulated, and all piping should be independently supported to avoid placing unnecessary stress on the pump. Before maintenance, isolate the air supply, close the fluid valves, release all internal pressure and drain the pump safely. Contact OVELL Pump with the fluid name, concentration, temperature, viscosity, solids content and required performance for assistance selecting a suitable stainless steel air operated double diaphragm pump.

Durable construction, good corrosion resistance, self-priming operation, dry-running capability and adjustable flow control