This document provides product information and specifications for Yamada air-powered double diaphragm pumps. It lists part numbers, materials, torque specifications, and installation instructions for various pump models. It also describes 10 reasons why Yamada pumps are suitable for applications, including their ability to handle fluids with solids, function without lubrication, and maintain constant pumping efficiency.

1. Tel: 847-631-9200 • Toll Free: 800-990-7867 • Fax: 847-631-9273 • sales@yamadapump.com • yamadapump.com
Lubrication Free
Do Not Lubricate
Part No.
713180
Part No.
771132
Part No.
771868
Part No.
771244
Part No.
713148
Guide on Top,
Valve Seat
on Bottom
Model Number
Air Fluid FNPT
ANSI #150
Flange
Aluminum Poly SS PVDF
Cast
Iron
Acetal CR NBR EPDM TPE TPO FPM PTFE
Out Chambers Center Rods Manifolds
Out Chambers Tie-rod Nuts Center Rods Manifold Bolts
NDP-5 1/4" 1/4" X X X X X X X
Metal 25 lbs-ft 43 lbs-ft 15 lbs-ft
NDP-20 Metal 8 lbs-ft N/A 22 lbs-ft 8 lbs-ft
DP-10 1/4" 3/8" X X X X X X X X X X
Plastic 22 lbs-ft 36 lbs-ft 15 lbs-ft
NDP-20 Metal (T,H,S) 10 lbs-ft N/A 29 lbs-ft 15 lbs-ft
DP-15 1/4" 1/2" X X X X X X X X X
Metal (T,H,S) 29 lbs-ft 43 lbs-ft 15 lbs-ft
NDP-20 Plastic 8 lbs-ft 8 lbs-ft 22 lbs-ft N/A
NDP-15 1/4" 1/2" X X X X X X X X X X X X
Plastic (T,H,S) 25 lbs-ft 36 lbs-ft 15 lbs-ft
NDP-20 Plastic (T,H,S) 10 lbs-ft 9 lbs-ft 29 lbs-ft N/A
NDP-20 1/4" 3/4" X X X X X X X X X X X X NDP-25 Metal 8 lbs-ft N/A 22 lbs-ft 8 lbs-ft
NDP-25 3/8" 1" X X X X X X X X X X X X X X NDP-25 Metal (T,H,S) 15 lbs-ft N/A 29 lbs-ft 25 lbs-ft
NDP-40 1/2" 1-1/2" X X X X X X X X X X X X X X NDP-25 Plastic 8 lbs-ft 8 lbs-ft 22 lbs-ft N/A
NDP-50 3/4" 2" X X X X X X X X X X X X X X NDP-25 Plastic (T,H,S)
T = PTFE, H = TPEE, S = TPO
15 lbs-ft 9 lbs-ft 29 lbs-ft N/A
NDP-80 3/4" 3" X X X X X X X X X X X X X
Torque Values NDP-40 thru NDP-80
Torque Values NDP-20/25 Metal Center BodyPort Sizes Connection Types Wetted Materials Elastomer Materials
Out Chambers Center Rods Manifolds
• Handles a wide variety of fluids with high solids content: No close fitting or
rotating parts so liquid with high solids content and /or size can be easily pumped.
• Self Priming: The Yamada pump design (incorporating internal check valves)
allows for high suction lift even at dry start-up and with heavier fluids.
• Ability to run dry: No close fittings or sliding parts are at risk–the pump can run
dry without damage.
• Variable flow rate and discharge pressure: Yamada pumps will run at any
setting within their operating range simply by adjusting the air inlet pressure and
system conditions. One pump can fit a broad spectrum of applications.
• Portable / Simple Installation: Yamada pumps can easily be toted to the
application’s location. Simply connect your air supply line and liquid lines, the
pump is ready to perform. There are no complex controls to install and operate.
• Dead Head: Because the discharge pressure can never exceed air inlet pressure,
the discharge line can be closed with no damage or wear. The pump will simply
slow down and stop.
• Shear sensitive: The gentle nature and minimal parts contact with the liquid
makes Yamada pumps an excellent choice for shear sensitive fluids.
• Explosion Proof: Yamada pumps are operated by compressed air, in turn they
are considered intrinsically safe.
• Submersible: If external components are compatible –Yamada pumps can be
submerged in the liquid by simply running the exhaust line above the liquid level.
• Pumping efficiency remains constant: There are no rotors, gears, or pistons,
which wear over time and lead to the gradual decline in performance/flow rate.
Ten Intelligent Reasons to Specify Yamada
Air-Powered Double Diaphragm Pumps
Install Direction Install Direction
Lube Free
Seal Ring
Out Chamber
Air Valve
Valve Seat
Tie Rod
Manifold
Pilot Valve with
Non-lube Static O'Ring
Removable Sleeve
316SS Center Rod
Nylon Throat Bearing
and V-Packing
V-Packing Install Direction
Sleeve Remover for
NDP-40/50/80
Spool Remover & Wrench
for NDP-5/15
Wrench for NDP-40/50/80
Nonmetallic
Wrench for NDP-20/25
Nonmetallic
Bushing & Sleeve Remover
for NDP-15 thru NDP-80
NDP-5 65 lbf-in 65 lbf-in 65 lbf-in
DP-10 122 lbf-in 122 lbf-in 105 lbf-in
DP-10 Plastic 105 lbf-in 122 lbf-in 70 lbf-in
DP-15 105 lbf-in 122 lbf-in 105 lbf-in
NDP-15 122 lbf-in 122 lbf-in 105 lbf-in
Torque Values NDP-5/15 and DP-10
Torque Values NDP-20/25 Plastic Center Body
Retain bolts for the
out chamber
Retain bolts for the
manifold
BPC, BPN, BPE, BPV 8 lbf-ft {10 N m} 8 lbf-ft {10 N m}
BPT, BPH, BPS 10 lbf-ft {13 N m} 9 lbf-ft {12 N m}
BPC, BPN, BPE, BPV, BE, BVV 8 lbf-ft {10 N m} 8 lbf-ft {10 N m}
BPT, BPH, BPS, BVT, BVH 15 lbf-ft { 20 N m} 9 lbf-ft {12 N m}
NDP-20-PP
NDP-25-PP