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Products >>
Centrifugal Pumps/Displacement Pumps, Vacuum Pump, Diaphragm pump, Submersible Pumps
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Diaphragm Pump: New 3 inch aluminum SandPiper diaphragm pump
New SandPiper 3" aluminum diaphragm pump with Tranquilizer surge suppressor. Model CSP 25 DN7 with 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). Serial number 797045
Item No. MTF02011-5806 |
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Diaphragn Pump: Used, Warren-Rupp/SandPiper 3" aluminum diaphragm pump. Model EB3M type TB-1-II
Used, Warren-Rupp/SandPiper 3" aluminum diaphragm pump. Model EB3M type TB-1-II. Serial # 383394. Pump has 3" flanged inlet and outlet. Pump has up to an estimated 250 gpm flow rate and a maximum working pressure of 100 psi depending on fluid being pumped, lift height and air supply. Requires pneumatic supply.
Item No. MTF02012-5454 |
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Diaphragn Pump: Used, Versa-Matic 2" aluminum diaphragm pump. Model E2.
Used, Versa-Matic 2" aluminum diaphragm pump. Model E2. Pump has a 2" NPT inlet and a 2" NPT outlet. Pump has up to an estimated 144 gpm flow rate depending on fluid being pumped, lift height and air supply. Requires pneumatic supply.
Item No. MTF02012-5534 |
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Diaphragn Pump: Used, Warren-RuppSandPiper 2" aluminum diaphragm pump. Model EB2M type TB-3-A.
Used, SandPiper 2" aluminum diaphragm pump. Model EB2M type TB-3-A. Serial # 663246. Pump has 2" NPT inlet and outlet. Requires pneumatic supply.
Item No. MTF02012-5485 |
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Diaphragn Pump: Used, Wilden 2" aluminum diaphragm pump. Model M8
Used, Wilden 2" aluminum diaphragm pump. Model M8. Pump has a 2" NPT inlet and a 2" NPT outlet. Pump has up to an estimated 156 gpm flow rate depending on fluid being pumped, lift height and air supply. Requires pneumatic supply.
Item No. MTF02012-5471 |
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Diaphragn Pump: Used, ARO 1.5" 316 stainless steel diaphragm pump. Model 666151-244-C.
Used, ARO 1.5" 316 stainless steel diaphragm pump. Model 666151-244-C. Pump has a 1.5" NPT inlet and a 1.5" NPT outlet. Pump has up to an estimated 90 gpm flow rate depending on fluid being pumped, lift height and air supply. Pump has 316 stainless steel manifold with aluminum center and Teflon balls and diaphragms. Requires pneumatic supply.
Item No. MTF02012-5727 |
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Diaphragn Pump: Used, SandPiper 1.5" aluminum diaphragm pump. Model SB1-1/2-A
Used, SandPiper 1.5" aluminum diaphragm pump. Model SB1-1/2-A. Pump has a 1.5" NPT inlet and a 1.5" NPT outlet. Pump has up to an estimated 90 gpm flow rate depending on fluid being pumped, lift height and air supply. Requires pneumatic supply.
Item No. MTF02012-5483 |
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Diaphragn Pump: Used, Warren-Rupp SandPiper 1.5" aluminum diaphragm pump. Model SB1-1/2-A.
Used, SandPiper 1.5" aluminum diaphragm pump. Model SB1-1/2-A. Pump has a 1.5" NPT inlet and a 1.5" NPT outlet. Pump has up to an estimated 90 gpm flow rate depending on fluid being pumped, lift height and air supply. Requires pneumatic supply.
Item No. MTF02012-5632 |
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Diaphragn Pump: Used, Wilden 1.5" aluminum diaphragm pump. Model M4
Used, Wilden 1.5" aluminum diaphragm pump. Model M4. Pump has a 1.5" NPT inlet and a 1.5" NPT outlet. Pump has up to an estimated 81 gpm flow rate depending on fluid being pumped, lift height and air supply. Requires pneumatic supply.
Item No. MTF02012-5474 |
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Diaphragn Pump: Used, Warren-Rupp SandPiper 1" aluminum diaphragm pump. Model S1F
Used, Warren-Rupp SandPiper 1" aluminum diaphragm pump. Model S1F. Pump has a 1" NPT inlet and a 1" NPT outlet. Pump has up to an estimated 45 gpm flow rate depending on fluid being pumped, lift height and air supply. Requires pneumatic supply.
Item No. MTF02012-5470 |
Diaphragm pumps use a positive displacement design rather than centrifugal force to move water through the casing. This means that the pump will deliver a specific amount of flow per stroke, revolution or cycle.
Engine powered versions are the most common and typically use the drive shaft to turn an offset connecting rod that is coupled to a flexible diaphragm. The connecting rod alternatively raises (expands) and lowers (contracts) the diaphragm at a RPM rate.
A vacuum is created inside the pump casing each time the diaphragm is raised. This opens the inlet valve and seals the discharge valve allowing a liquid and air to enter the pump. When the diaphragm is lowered the resulting pressure seals the inlet and opens the outlet valve purging the pump housing of water and air. Unlike centrifugal designs the water inside the casing is positively displaced and no recirculation occurs.
Types of diaphragm pumps
Diaphragm pumps are subcategorized into three types. The first type is one that is sealed on both sides with pumped fluid on one end and air or hydraulic fluid on the other. This type of diaphragm is flexible enough to cause increase or decrease in the pump volume chamber. With the help of non-return check valves, the reversed flow of fluid is prevented.
A second type of diaphragm pump is one that works with the help of volumetric positive displacement. In this type, electromechanical measures make the pump work instead of employing air or oil in the process. The mechanical action makes the pump more flexible as the other side of the diaphragm pump is open.
The third type of diaphragm pump is one that has unsealed diaphragms. Either one or more of these diaphragms work even without using any seal. Fluid is pumped on both sides while the diaphragm is flexed. The flexibility causes the volume of production to change.
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