Sandpiper’s Metallic AOD (Air-Operated-Diaphragm), High Pressure Pump, the SH2-M 

Sandpiper Metallic AOD Pump, the SH2-M, is a 2:1 ratio high pressure pump, single acting diaphragm pump via compressed air. Being the only high-pressure, air-operated diaphragm flap valve pump in the world, the unit can deliver discharge pressures twice the inlet pressure up to 250 psig (17.2 barg). The main utilization of the pump in filter press feeds and other demanding applications requiring higher discharge pressures and/or solids-handling that most air-operated single-diaphragm (AOD) pumps are incapable of achieving. The pump has been engineered with metallic seats and heavy-duty flap valves to help ensure a durable valve seal for performance in high-pressure pumps on the market that features a balanced diaphragm design. The design allows a minimal pressure differential across the diaphragm, helping to decrease the need for replacement parts – this effectively decreases downtime and lowers the total cost of ownership. The SH2-M high pressure pump is available in both aluminum and cast iron with various diaphragm (elastomers) options.

Sandpiper’s SH2-M, High Pressure Pump comes in a variety of features that highlights its advantages in its industrial applications;

• Solids-handling; Handling solids up to 1.8″ (45 mm) in diameter, it is the only high-pressure flap valve pump in the world.
• Heavy duty; Bolted construction and made with robust materials.
• Suction stroke control; Independently regulated suction stroke allows for optimum stroke control.
• ESADS+ Air Distribution System; Sandpiper is the only AODD/AOD Pump manufacturer to offer an externally serviceable air distribution system, allowing for quick and easy access to the pilot and spool valves without removing the pump from service. Repair or clean in 5 minutes (versus 55 minutes for competitors), reducing your downtime by as much as 90%.