Yamada® NDP-40 series Air Powered Double Diaphragm (AODD) pumps provide a maximum flow rate of 116 gallons per minute. Pumps are available in aluminum, stainless steel (316), Kynar® (PVDF), groundable acetal, and polypropylene construction.
What separates Yamada from the rest of the pack is our air valve technology. Yamada uses a completely non-lubricated main air valve and independent pilot mechanisms to control the air logic.
As compressed air enters the pump, it is directed via the main air valve to one side or the other, depending upon the starting position of the c-spool. As the air enters the chamber, it forces the diaphragm outward. This outward momentum forces liquid out of the discharge ball valve and loads the opposite inlet ball valve. As the diaphragm travels outward, the connected diaphragm on the opposite side is pulling the diaphragm inward.
When it travels a full stroke, it will contact the pilot valve, depressing it and breaking the seal to open an exhaust port.
The open port allows the compressed air to the exhaust from the back side of the air valve. The pressure drop produces a shift of the main air valve. This motion simply repeats on the other side.
NDP-40/50/80 English
NDP-40/50/80 Español
NDP-40 Aluminum (JPG)
NDP-40 Aluminum (DWG)
NDP-40 Aluminum (PDF)
NDP-40 Cast Iron, NPT (JPG)
NDP-40 Cast Iron, NPT (DWG)
NDP-40 Cast Iron, NPT (PDF)
NDP-40 Kynar®, Flange (JPG)
NDP-40 Kynar®, Flange (DWG)
NDP-40 Kynar®, Flange (PDF)
NDP-40 Polypropylene, Flange (JPG)
NDP-40 Polypropylene, Flange (DWG)
NDP-40 Polypropylene, Flange (PDF)
NDP-40 Stainless Steel, Flange (JPG)
NDP-40 Stainless Steel, Flange (DWG)
NDP-40 Stainless Steel, Flange (PDF)
NDP-40 Stainless Steel, NPT (JPG)
NDP-40 Stainless Steel, NPT (DWG)
NDP-40 Stainless Steel, NPT (PDF)
NDP-40 Aluminum (EPRT)
NDP-40 Cast Iron (EPRT)
NDP-40 Kynar® (EPRT)
NDP-40 Polypropylene (EPRT)
NDP-40 Stainless Steel Flange (EPRT)
NDP-40 Stainless Steel NPT (EPRT)
NDP-40 Aluminum (IGS)
NDP-40 Cast Iron (IGS)
NDP-40 Kynar® (IGS)
NDP-40 Polypropylene (IGS)
NDP-40 Stainless Steel Flange (IGS)
NDP-40 Stainless Steel NPT (IGS)
Rubber Diaphragm
PTFE Diaphragm
NDP-40BPC
NDP-40BPN
NDP-40BPE
NDP-40BPH
NDP-40BPS
NDP-40BPV
NDP-40BPT
NDP-40BVS
NDP-40BVT
NDP-40BAC
NDP-40BAN
NDP-40BAE
NDP-40BAH
NDP-40BAS
NDP-40BAV
NDP-40BAT
NDP-40BSC
NDP-40BSN
NDP-40BSE
NDP-40BSH
NDP-40BSS
NDP-40BSV
NDP-40BST
NDP-40BFC
NDP-40BFN
NDP-40BFE
NDP-40BFH
NDP-40BFS
NDP-40BFV
NDP-40BFT
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