http://www.specialprojects.com/equipment/5808/
New SandPiper 3" aluminum diaphragm pump with Tranquilizer surge suppressor. Model CSP 25 DN7 which is the same as a HDF3-DN7. Pump has 3" flanged inlet and outlet. Pump has up to an 260 gpm flow rate, max flow of 200 cfm, and a maximum working pressure of 125 psi depending on fluid being pumped, lift height and air supply. Tranquilizer surge suppressor is a model TA3-N1A. Requires pneumatic supply. Through local distributors this unit cost $6,000 new (this is not our price).