NDP-50 Série

Yamada® NDP-50 Bomba de diafragma dupla série

Yamada Trial Pump Program

2" Porto Fluido

As bombas Yamaha® NDP-50 da série AODD fornecem uma vazão máxima de 164 galões por minuto. As bombas estão disponíveis em alumínio, aço inoxidável (316), Kynar® (PVDF), acetal moído e construção em polipropileno.

O que separa a Yamada do resto da embalagem é a nossa tecnologia de válvula de ar. A Yamada usa uma válvula de ar principal totalmente não lubrificada e mecanismos pilotos independentes para controlar a lógica do ar.

À medida que o ar comprimido entra na bomba, ele é direcionado através da válvula de ar principal para um lado ou para o outro, dependendo da posição inicial da bobina c. Quando o ar entra na câmara, força o diafragma para fora. Este impulso externo força o líquido para fora da válvula de esfera de descarga e carrega a válvula de esfera de entrada oposta. À medida que o diafragma se desloca para fora, o diafragma conectado no lado oposto está puxando o diafragma para dentro.

Quando percorrer um curso completo, ele entrará em contato com a válvula piloto, pressionando-a e quebrando a vedação para abrir uma porta de escape.

A porta aberta permite que o ar comprimido para o escape do lado de trás da válvula de ar. A queda de pressão produz um deslocamento da válvula de ar principal. Este movimento simplesmente repete do outro lado.

Opção> Diafragma Final



164 Gallons/Minute
2" Fluid Port (NPT or ANSI Flange)


Intake & Discharge Connections
Polypropylene (PPG)
2" ANSI Flange B16.5 #150
Kynar® (PVDF) 2" ANSI Flange B16.5 #150
Aluminum (ADC-12) 2" ANSI Flange B16.5 #150 (with tapped 2" Female NPT)
Stainless Steel (316) 2" ANSI Flange B16.5 #150 or 2" Female NPT
Cast Iron 2" Female NPT
Air Inlet 3/4" Female NPT (includes ball valve)
Air Exhaust 1" 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)
*The maximum liquuid temperature for metal and Kynar® fitted pumps is determined by the elastomer (diaphragm material). Polypropylene 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: 1.12 gallons (4.25 liters)
PTFE diaphragm: 0.69 gallons (2.61 liters)

Maximum Cycles Per Minute

Rubber diaphragm: 146
PTFE diaphragm: 220

Maximum Size Solid 5/16" (8 mm)
Maximum Dry Suction Lift Rubber-fitted pump capability: 19-feet
Air Motor

Aluminum - Metal or Plastic Pumps
Plastic - Plastic Pumps

Optional Coating PTFE-coated


:: Aluminum
Dimensions: 17.78" W x 30.70" H
Net Weight: 81.6 lbs. (37 kg)
Shipping Weight: 96.6 lbs.
:: Cast Iron
Dimensions: 17.72" W x 30.56" H
Net Weight: 143 lbs. (65 kg)
Shipping Weight: 158 lbs.
:: Stainless Steel (NPT)
Dimensions: 17.72" W x 30.56" H
Net Weight: 132 lbs. (60 kg)
Shipping Weight: 147 lbs.
:: Stainless Steel (ANSI flange)
Dimensions: 17.72" W x 30.78" H
Net Weight: 132 lbs. (60 kg)
Shipping Weight: 147 lbs.
:: Polypropylene (ANSI flange)
Dimensions: 18.30" W x 32.30" H
Net Weight: 77.2 lbs. (35 kg)
Shipping Weight: 92.2 lbs.
:: Polypropylene-PP (ANSI flange)
Dimensions: 18.30" W x 32.30" H
Net Weight: 81.6 lbs. (37 kg)
Shipping Weight: 96.6 lbs.
:: Kynar (PVDF) (ANSI flange)
Dimensions: 18.19" W x 32.24" H
Net Weight: 90.5 lbs. (41 kg)
Shipping Weight: 105.5 lbs.
:: Kynar-PP (ANSI flange)
Dimensions: 18.18" W x 32.24" H
Net Weight: 94.8 lbs. (43 kg)
Shipping Weight: 109.8 lbs.


Air Motor Kit

K45-AM (metal center body) and K50-AM-PP (plastic center body)

Liquid End Kits
  Aluminum: K50-MC, K50-MN, K50-ME, K50-MH, K50-MS, K50-MV, K50-MT
  Stainless Steel: K50-MC, K50-MN, K50-ME, K50-MH, K50-MS, K50-MV, K50-MT
  Cast Iron: K50-MC, K50-MN, K50-ME, K50-MH, K50-MS, K50-MV, K50-MT
  Polypropylene: K50-PC, K50-PN, K50-PE, K50-PH, K50-PS, K50-PV, K50-PT
  Kynar: K50-VE, K50-VH, K50-VS, K50-VV, K50-VT
Filter / Regulators

FR-5, FR-5A (Auto Drain)


AD-50 Series

Liquid Level Controller

LLC-2Y, LLC-1 and LLC-1010


YSC-3EX and YSC-Batch

Diaphragm Monitor System


DRy Run Detector


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.

Outside-Accessible Air Valve

Inspection or maintenance of every Yamada air valve may be performed without removing the pump from service. Outside accessible, making it easy to fix / inspect.

Unified Air Valve Concept

Common-size air valve assemblies reduce parts confusion and inventory.

Pilot Valve

Unique to the Yamada design is an individual modular pilot valve that actuates the air valve. It is depressed slightly by the inner center disk creating a pressure drop at one end of the air valve, allowing shifting to occur. It is maintenance free with no cumbersome snap rings or lubricated dynamic o-rings to replace or repair.

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
  • Cannot Overheat
  • High Pressure capabilities
  • No mechanical seals, couplings or motors
  • No pressure relief or bypass needed

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