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SA Series Flap Pump

High Flow Flap Pump Solutions for Solids & Slurry

What is a Flap Pump?

A Flap Pump is a type of air-operated double diaphragm pump that uses flexible flap valves (instead of rigid ball or metal check valves) to smoothly pass slurry or fluids containing large solids without clogging. Skylink’s SA-Series Flap Pumps are built to deliver high flow rates, large particle handling, and long-term durability in demanding industrial applications. Available in materials like aluminum, 316L stainless steel, and cast iron, they are suitable for abrasive sludges, wastewater with solids, slurry transfer, and other tough conditions.

Product Models & Specifications

Model	Liquid Inlet / Outlet Size	Air Inlet Size	Max Flow Rate	Max Solids Size	Material Options	Max Pressure / Temp	Approx. Weight
SA25 (1")	25 mm (1″) BSPT threads	½″ BSPT	170 LPM (40 GPM)	25 mm (1″)	Aluminum / 316L / Cast Iron	8.6 bar / 135 ℃	~12 kg (AL) / ~19 kg (CI/316L)
SA50 (2")	51 mm (2″) BSPT / ANSI / DIN	¾″ BSPT	511 LPM (135 GPM)	45 mm (~1.8″)	Aluminum / 316L / Cast Iron	8.6 bar / 135 ℃	~36 kg (AL) / ~56 kg (CI/316L)
SA80 (3")	76 mm (3″) BSPT / ANSI / DIN	¾″ BSPT	988 LPM (260 GPM)	50 mm (2″)	Aluminum / 316L / Cast Iron	8.6 bar / 135 ℃	~75 kg (AL) / ~138 kg (CI/316L)

Optional flange or threaded connections. Custom sizes and materials on request.

Why Choose Skylink SA-Series Flap Pumps?

Large Solids Handling — Designed to pass solids up to 50 mm (2″) in size, reducing risk of clogging.
High Flow & Pressure — Up to 988 LPM / 260 GPM with operating pressure up to 8.6 bar (125 psi).
Durable Materials — Aluminum, Cast Iron, Stainless Steel 316L options to suit various corrosive, abrasive, or high-temperature environments.
Flap Valve Design — More forgiving to solids, less likely to cause wear or blockages compared with rigid valves; smoother fluid flow.
Versatile Connections & Configurations — Threaded, flanged (ANSI/DIN), different air inlet options.
Temperature & Operating Capability — Handles temperatures up to 135 °C, suitable for many industrial fluids and conditions.