ARO 666056-2A4 Double Diaphragm Pump

ARO 666056-2A4 Double Diaphragm Pump is a 1/2-inch non-metallic air-operated double diaphragm pump in the ARO Compact Series 66605X-XXX family. SKU 666056-2A4 uses 1/2-14 NPTF-1 fluid inlet and outlet connections.

66605X-XXX Series Overview

This compact 1:1-ratio pump family is built for fluid transfer, circulation, dispensing, and OEM equipment where installation space is limited. Non-metallic wetted construction supports a broad range of compatible industrial fluids.

• Flow: up to 13 gpm (49.2 lpm).
• Pressure: up to 100 psi (6.9 bar) air inlet and fluid outlet pressure.
• Solids handling: particles up to 3/32 in (2.4 mm).
• Suction: up to 15 ft (4.6 m) maximum dry suction lift.

Compact Series Design Benefits

• The unbalanced air-valve design supports stall-resistant operation.
• A compact footprint makes the pump suitable for machinery and OEM integration.
• Modular construction provides practical access for routine service.
• Multiple fluid-section materials are available across the family for application-specific selection.

666056-2A4 Configuration

This model is configured with seats: Stainless Steel, balls: Stainless Steel, diaphragms: PTFE/Santoprene.

Configured temperature range: 350°F (176.7°C). This model-specific limit is determined by its wetted materials and may be lower than the maximum rating of an individual elastomer.

Confirm chemical compatibility, operating temperature, air supply, and connection requirements for the complete configured model before ordering.