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Yamada® NDP-20 Diaphragm Pump Series 요약정보 및 구매

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NDP-20 Polypropylene, ANSI Flange

12.44" W x 14.75" H
Net Weight: 17.6 lbs. (8.2 kg)
Shipping Weight: 22.6 lbs.

NDP-20 Polypropylene, NPT

12.44" W x 14.50" H
Net Weight: 17.6 lbs. (8.2 kg)
Shipping Weight: 22.6 lbs.

NDP-20 Metal, NPT

Dimensions: 9.80" W x 12.60" H
Net Weight: 19.8 lbs. (9.0 kg)
Shipping Weight: 23 lbs.

NDP-20 Metal w/Poly Air Motor

Dimensions: 9.80" W x 12.60" H
Net Weight: 30.8 lbs. (13.9 kg)
Shipping Weight: 32 lbs.

NDP-20-PP Polypropylene, NPT

12.44" W x 14.50" H
Net Weight: 17.6 lbs. (8.2 kg)
Shipping Weight: 22.6 lbs.

Yamada^® NDP-20 series Air Powered Double Diaphragm (AODD) pumps provide a maximum flow rate of 28 gallons per minute. Pumps are available in aluminum, stainless steel (316), and polypropylene construction, with a wide variety of diaphragm materials.

Unified Air Valve Concept – 2 common size air valve assemblies used for 6 sizes of pumps
Reducing reassembly confusion and parts inventory

Truly No-Lubricated Air Valve – patented air valve on all NDP series pumps
Never requires lubrication or pre-packing

Non-Stalling – patented non-centering, 304SS spring-assisted shifter, ensuring a positive shift every time

Tested to last over 300 million cycles

Aides in long dead head application for reliable startup

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.

GENERAL PUMP INFORMATION

31.7 Gallons/Minute
3/4" NPT Fluid Port

Intake & Discharge Connections

Polypropylene (PPG)	3/4" Female NPT or 3/4" ANSI Flange B16.5 #150
Aluminum (ADC-12)	3/4" Female NPT
Stainless Steel (316)	3/4" Female NPT
Air Inlet	3/8" Female NPT (includes ball valve)
Air Exhaust	3/4" Female NPT (includes silencer)

Maximum Liquid Temperature¹

Buna N 180°F (82°C)

Neoprene 180°F (82°C)

Santoprene^{^®}(TPO) 180°F (82°C)

EPDM 212°F (100°C)

PTFE 212°F (100°C)

Hytrel^{^®} (TPE) 248°F (120°C)

Viton^{^®} fluoroelastomer 248°F (120°C)

¹Polypropylene and acetal pumps have a maximum liquid temperature of 180°F (82°C) regardless of diaphragm material.

Air Supply Pressure (All Models)	20 to 100 PSI (1.4 to 7 kgf/cm²)
Discharge Volume Per Cycle	Rubber diaphragm: 0.163 gallons (615 cc) PTFE diaphragm: 0.143 gallons (539 cc)
Maximum Cycles Per Minute	Rubber diaphragm: 195 PTFE diaphragm: 195
Maximum Size Solid	1/16" (2.0 mm)
Maximum Dry Suction Lift	Rubber-fitted pump capability: 18-feet
Air Motor	Standard: Aluminum
Optional Coating	PTFE-coated
Other Options	Split manifold pumps

MATERIAL TYPES

:: Aluminum
Dimensions:	9.80" W x 12.60" H
Net Weight:	19.8 lbs. (9.0 kg)
Shipping Weight:	23 lbs.

:: Polypropylene (ANSI flange)
Dimensions:	12.44" W x 14.75" H
Net Weight:	17.6 lbs. (8.2 kg)
Shipping Weight:	22.6 lbs.

:: Polypropylene (NPT)
Dimensions:	12.44" W x 14.50" H
Net Weight:	17.6 lbs. (8.2 kg)
Shipping Weight:	22.6 lbs.

:: Stainless Steel
Dimensions:	9.80" W x 12.60" H
Net Weight:	30.8 lbs. (13.9 kg)
Shipping Weight:	32 lbs.

ACCESSORIES

Air Motor Kit	K225-AM (metal center body) and K225-AP (plastic center body)
Liquid End Kits	Aluminum: K20-MC-1, K20-MN-1, K20-ME-1, K20-MH-1, K20-MS-1, K20-MV-1, K20-MT-1 Stainless Steel: K20-MC-1, K20-MN-1, K20-ME-1, K20-MH-1, K20-MS-1, K20-MV-1, K20-MT-1 Polypropylene: K20-PC-PP, K20-PN-PP, K20-PE-PP, K20-PH-PP, K20-PS-PP, K20-PV-PP, K20-PT-PP
Filter / Regulators	FR-1 and FR-1A (Auto Drain)
Dampener	AD-25 Series
Liquid Level Controller	LLC-2Y, LLC-1 and LLC-4
Controllers	YSC-3EX and YSC-Batch
Diaphragm Monitor System	DM-2
DRy Run Detector	DRD-100

The Yamada Advantage

Yamada Air Powered Double Diaphragm Pumps: Engineered for High Performance. Manufactured for Long Life.

Rugged, Bolted Construction

All Yamada pumps feature bolted construction, which eliminates leaks and simplifies post-maintenance reassembly. Bolted construction is superior to clamp band retainers, which frequently require frustrating, unnecessary leakage rebuilds from misalignment during reassembly.

Patented Air Valve Technology

Incorporated in every Yamada Air Powered Double Diaphragm pump

Yamada air valve technology is the heart of the air-powered double diaphragm pump and determines reliability. Yamada holds three patents on its field proven valve and enjoys a superior reputation throughout the industry.

Why Specify an AODD Pump?

Handles a wide variety of fluids with high solids content
Self priming
Ability to run dry
Variable flow rate and discharge pressure
Portable/simple installation
Dead head
Shear sensitive
Safe operation
Submersible
Pumping efficiency remains constant

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