Yamada NDP-20

Up to 31.7 gpm. Available in aluminum, stainless steel (316), and polypropylene construction.

SERIES DETAILS:

Up to 31.7 gpm. Available in aluminum, stainless steel (316), and polypropylene construction, with a wide variety of diaphragm materials. 3/4 NPT ports.

Unified Air Valve Concept – 2 common size air valve assemblies used for six 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 backside of the air valve. The pressure drop produces a shift of the main air valve. This motion repeats on the other side

MANUFACTURERS: Yamada
Yamada Pump NDP-20 Series
Model Number Size Max Flow (GPM) Price
NDP20 PBH420-D NA NA Call for Pricing
NDP20 PBH420-S Call for Pricing
NDP-20/25BAG-C 0.75" 31.7 Call for Pricing
NDP-20/25BAS-Z 0.75" 31.7 Call for Pricing
NDP-20/25BSG-C-Z 0.75" 31.7 Call for Pricing
NDP-20BAE 0.75" 31.7 Call for Pricing
NDP-20BAE-PP 0.75" 31.7 Call for Pricing
NDP-20BAG 0.75" 31.7 Call for Pricing
NDP-20BAG-C 0.75" 31.7 Call for Pricing
NDP-20BAG-C-D 0.75" 31.7 Call for Pricing
NDP-20BAH 0.75" 31.7 Call for Pricing
NDP-20BAH-1S-UL 0.75" 31.7 Call for Pricing
NDP-20BAH-PP 0.75" 31.7 Call for Pricing
NDP-20BAH-T 0.75" 31.7 Call for Pricing
NDP-20BAH-T1 0.75" 31.7 Call for Pricing
NDP-20BAH-UL 0.75" 31.7 Call for Pricing
NDP-20BAN 0.75" 31.7 Call for Pricing
NDP-20BAN CSA 0.75" 31.7 Call for Pricing
NDP-20BAN-1S 0.75" 31.7 Call for Pricing
NDP-20BAN-1S-UL 0.75" 31.7 Call for Pricing
NDP-20BAN-I 0.75" 31.7 Call for Pricing
NDP-20BAN-S1 0.75" 31.7 Call for Pricing
NDP-20BAN-T 0.75" 31.7 Call for Pricing
NDP-20BAN-T1 0.75" 31.7 Call for Pricing
NDP-20BAN-UL 0.75" 31.7 Call for Pricing
NDP-20BAN-Z 0.75" 31.7 Call for Pricing
NDP-20BAS 0.75" 31.7 Call for Pricing
NDP-20BAS-1 0.75" 31.7 Call for Pricing
NDP-20BAS-1S 0.75" 31.7 Call for Pricing
NDP-20BAS-FLG 0.75" 31.7 Call for Pricing
NDP-20BAS-S1 0.75" 31.7 Call for Pricing
NDP-20BAS-T 0.75" 31.7 Call for Pricing
NDP-20BAS-T-Z 0.75" 31.7 Call for Pricing
NDP-20BAS-T-Z-L 0.75" 31.7 Call for Pricing
NDP-20BAS-T1 0.75" 31.7 Call for Pricing
NDP-20BAS-Z 0.75" 31.7 Call for Pricing
NDP-20BAT 0.75" 31.7 Call for Pricing
NDP-20BAT W/ 316 SS BALLS 0.75" 31.7 Call for Pricing
NDP-20BAT-1S-UL 0.75" 31.7 Call for Pricing
NDP-20BAT-BSPT 0.75" 31.7 Call for Pricing
NDP-20BAT-BU 0.75" 31.7 Call for Pricing
NDP-20BAT-O 0.75" 31.7 Call for Pricing
NDP-20BAT-SS 0.75" 31.7 Call for Pricing
NDP-20BAT-UL 0.75" 31.7 Call for Pricing
NDP-20BAV 0.75" 31.7 Call for Pricing
NDP-20BPC 0.75" 31.7 Call for Pricing
NDP-20BPC FLANGE 0.75" 31.7 Call for Pricing
NDP-20BPC-PP FLANGE 0.75" 31.7 Call for Pricing
NDP-20BPC-PP-T 0.75" 31.7 Call for Pricing
NDP-20BPC-T 0.75" 31.7 Call for Pricing
NDP-20BPC-Z 0.75" 31.7 Call for Pricing
NDP-20BPE 0.75" 31.7 Call for Pricing
NDP-20BPE FLANGE 0.75" 31.7 Call for Pricing
NDP-20BPE-PP FLANGE 0.75" 31.7 Call for Pricing
NDP-20BPG-E 0.75" 31.7 Call for Pricing
NDP-20BPH 0.75" 31.7 Call for Pricing
NDP-20BPH FLANGE 0.75" 31.7 Call for Pricing
NDP-20BPH-PP FLANGE 0.75" 31.7 Call for Pricing
NDP-20BPH-PP-T1 0.75" 31.7 Call for Pricing
NDP-20BPH-T 0.75" 31.7 Call for Pricing
NDP-20BPH-T1 0.75" 31.7 Call for Pricing
NDP-20BPN 0.75" 31.7 Call for Pricing
NDP-20BPN FLANGE 0.75" 31.7 Call for Pricing
NDP-20BPN-PP FLANGE 0.75" 31.7 Call for Pricing
NDP-20BPN-T 0.75" 31.7 Call for Pricing
NDP-20BPS 0.75" 31.7 Call for Pricing
NDP-20BPS FLANGE 0.75" 31.7 Call for Pricing
NDP-20BPS-O 0.75" 31.7 Call for Pricing
NDP-20BPS-PP FLANGE 0.75" 31.7 Call for Pricing
NDP-20BPS-PP-1 0.75" 31.7 Call for Pricing
NDP-20BPS-PP-T 0.75" 31.7 Call for Pricing
NDP-20BPS-PP-T FLANGE 0.75" 31.7 Call for Pricing
NDP-20BPS-PP-T1 0.75" 31.7 Call for Pricing
NDP-20BPS-PP-T1-TC 0.75" 31.7 Call for Pricing
NDP-20BPS-PP-Z 0.75" 31.7 Call for Pricing
NDP-20BPS-T 0.75" 31.7 Call for Pricing
NDP-20BPS-T1 0.75" 31.7 Call for Pricing
NDP-20BPS-Z 0.75" 31.7 Call for Pricing
NDP-20BPT 0.75" 31.7 Call for Pricing
NDP-20BPT FLANGE 0.75" 31.7 Call for Pricing
NDP-20BPT-BU 0.75" 31.7 Call for Pricing
NDP-20BPT-PP FLANGE 0.75" 31.7 Call for Pricing
NDP-20BPT-PP-G-C 0.75" 31.7 Call for Pricing
NDP-20BPT-Z 0.75" 31.7 Call for Pricing
NDP-20BPV 0.75" 31.7 Call for Pricing
NDP-20BPV FLANGE 0.75" 31.7 Call for Pricing
NDP-20BPV-I 0.75" 31.7 Call for Pricing
NDP-20BPV-PP FLANGE 0.75" 31.7 Call for Pricing
NDP-20BPV-PP-T FLANGE 0.75" 31.7 Call for Pricing
NDP-20BSC 0.75" 31.7 Call for Pricing
NDP-20BSE 0.75" 31.7 Call for Pricing
NDP-20BSE-FDA 0.75" 31.7 Call for Pricing
NDP-20BSE-FDA-D 0.75" 31.7 Call for Pricing
NDP-20BSE-FDA-S1 0.75" 31.7 Call for Pricing
NDP-20BSE-PP-T1 0.75" 31.7 Call for Pricing
NDP-20BSE-S1 0.75" 31.7 Call for Pricing
NDP-20BSG-C 0.75" 31.7 Call for Pricing
NDP-20BSG-E 0.75" 31.7 Call for Pricing
NDP-20BSG-V 0.75" 31.7 Call for Pricing
NDP-20BSH 0.75" 31.7 Call for Pricing
NDP-20BSH-FDA 0.75" 31.7 Call for Pricing
NDP-20BSH-FDA-D 0.75" 31.7 Call for Pricing
NDP-20BSH-PP-T1 0.75" 31.7 Call for Pricing
NDP-20BSH-T 0.75" 31.7 Call for Pricing
NDP-20BSN 0.75" 31.7 Call for Pricing
NDP-20BSN-S1 0.75" 31.7 Call for Pricing
NDP-20BSS 0.75" 31.7 Call for Pricing
NDP-20BSS-1 0.75" 31.7 Call for Pricing
NDP-20BSS-I 0.75" 31.7 Call for Pricing
NDP-20BSS-O 0.75" 31.7 Call for Pricing
NDP-20BSS-PP-S1 0.75" 31.7 Call for Pricing
NDP-20BSS-S1 0.75" 31.7 Call for Pricing
NDP-20BSS-T 0.75" 31.7 Call for Pricing
NDP-20BST 0.75" 31.7 Call for Pricing
NDP-20BST-BU 0.75" 31.7 Call for Pricing
NDP-20BST-EP 0.75" 31.7 Call for Pricing
NDP-20BST-EP-20RA 0.75" 31.7 Call for Pricing
NDP-20BST-EP-20RA-1/2VCR 0.75" 31.7 Call for Pricing
NDP-20BST-EP-20RA-3/4VCR 0.75" 31.7 Call for Pricing
NDP-20BST-EP-20RA-EX 0.75" 31.7 Call for Pricing
NDP-20BST-EP-20RA-OP-1/2VCR 0.75" 31.7 Call for Pricing
NDP-20BST-EP-20RA-OP-3/4VCR 0.75" 31.7 Call for Pricing
NDP-20BST-EP-SP-1 0.75" 31.7 Call for Pricing
NDP-20BST-EP-SP-2 (W/O BASE) 0.75" 31.7 Call for Pricing
NDP-20BST-EX-20RA-FSI 0.75" 31.7 Call for Pricing
NDP-20BST-FDA 0.75" 31.7 Call for Pricing
NDP-20BST-FDA-D 0.75" 31.7 Call for Pricing
NDP-20BST-FDA-EP-20RA 0.75" 31.7 Call for Pricing
NDP-20BST-FLG 0.75" 31.7 Call for Pricing
NDP-20BST-G-C-S1 0.75" 31.7 Call for Pricing
NDP-20BST-S1 0.75" 31.7 Call for Pricing
NDP-20BST-S1-BU 0.75" 31.7 Call for Pricing
NDP-20BSV 0.75" 31.7 Call for Pricing
NDP-20BSV-PP 0.75" 31.7 Call for Pricing
NDP-20BAC 0.75" 31.7 Call for Pricing
NDP-20BAC-PP 0.75" 31.7 Call for Pricing
NDP-20BAN-PP 0.75" 31.7 Call for Pricing
NDP-20BAS-PP 0.75" 31.7 Call for Pricing
NDP-20BAT-PP 0.75" 31.7 Call for Pricing
NDP-20BAV-PP 0.75" 31.7 Call for Pricing
NDP-20BPC-PP 0.75" 31.7 Call for Pricing
NDP-20BPE-PP 0.75" 31.7 Call for Pricing
NDP-20BPH-PP 0.75" 31.7 Call for Pricing
NDP-20BPN-PP 0.75" 31.7 Call for Pricing
NDP-20BPS-PP 0.75" 31.7 Call for Pricing
NDP-20BPT-PP 0.75" 31.7 Call for Pricing
NDP-20BPV-PP 0.75" 31.7 Call for Pricing
NDP-20BSC-PP 0.75" 31.7 Call for Pricing
NDP-20BSE-PP 0.75" 31.7 Call for Pricing
NDP-20BSH-PP 0.75" 31.7 Call for Pricing
NDP-20BSN-PP 0.75" 31.7 Call for Pricing
NDP-20BSS-PP 0.75" 31.7 Call for Pricing
NDP-20BST-PP 0.75" 31.7 Call for Pricing