MAINTENANCE MANUAL
YAMADA AIR-OPERATED DOUBLE DIAPHRAGM PUMP
NDP-H40 NDP-H50
NDP-H80
Doc. No. NDP 306M-06
Page 1: ...MAINTENANCE MANUAL YAMADA AIR OPERATED DOUBLE DIAPHRAGM PUMP NDP H40 NDP H50 NDP H80 Doc No NDP 306M 06...
Page 2: ...gnore the caution described and operate the product in an Improper manner there is danger of personal injury or property damage Furthermore to indicate the type of danger and damage the following symb...
Page 3: ...s 4 4 2 Inspection 5 4 3 Installation 5 5 Diaphragm Center rod and Center bushing 5 1 Removal BA BS BF types 6 BP type 6 5 2 Inspection 7 5 3 Installation B C B N B E B V B H B S B H T types 7 B T typ...
Page 4: ...ough repetition of this operation material is repeatedly taken in and discharged out 2 Tools etc 2 1 General tools Socket wrenches 13mm 17mm 19mm except with the NDP H40 BP 24mm BA BS BF Hexagonal box...
Page 5: ...DP H80 retainer bolts 1 from the out manifold and remove the out manifold Fig 4 1 Remove the ball valve seat and O ring Fig 4 2 Remove the 6 8 on the NDP H80 retainer bolts 2 from the in manifold and...
Page 6: ...lts 1 from the out manifold and remove the out manifold Fig 4 4 Remove the ball valve seat and O ring Fig 4 5 Remove the 8 retainer bolts 2 from the in manifold and remove the in manifold Fig 4 4 Remo...
Page 7: ...ve the protector and out manifold Fig 4 7 Remove the ball valve guide only NDP H80 valve seat and O ring Fig 4 8 Remove the 6 8 on the NDP H80 retainer bolts 2 from the in manifold and remove the prot...
Page 8: ...eat B C B N B E B V B H B S B H T B T NDP H40 4 6 11 5 mm 1 7 4 2 mm NDP H50 5 0 12 5 mm NDP H80 O ring other than PTFE If O ring is worn out or cracked replace it 4 3 Installation For installation se...
Page 9: ...side Fig 5 2 Pull out the other center disk diaphragm and center bushing together with the center rod from the main body Remove the other nut using the double nut method Then remove the coned disk spr...
Page 10: ...t is outside the usable range replace the rod Usable range of center rod 17 93 18 00 mm Center bushing Fig 5 9 Measure the diameter and if it is outside the usable range replace the rod Usable range o...
Page 11: ...and install in the reverse order of disassembly Apply assembly grease urea to center rod and insert it into the main body Fig 5 11 Apply assembly grease urea to the outer surface of the center bushin...
Page 12: ...ide diameter and if it is outside the usable range replace the throat bearing Usable range of throat bearing 25 04 25 15mm O ring If the O ring is worn out or cracked replace it 6 3 Installation For i...
Page 13: ...lts from the valve body and remove the valve body Fig 7 1 Disconnect in the same way both up and down Unscrew all four screws securing the guide plate and remove the block spring and ball Fig 7 2 NOTE...
Page 14: ...7 5 Measure the thickness and if it is not within the permissible range replace with a new one Also replace the block if its sliding surface is worn out Usable range of sleeve 8 75 mm 9 00 mm Gasket B...
Page 15: ...hem Pull out the pins in the direction of the arrow Remove the valve switcher in the direction of the arrow 8 2 Inspection Bushing Fig 8 3 Measure the inside diameter Outside diameter and if it is out...
Page 16: ...er shown Metal type All bolts should be retorqued 1 Right before start up 2 There are any leaks of material on daily inspecting a pump NOTE Retighten the Out chamber and then the manifold in this orde...
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Page 18: ...Manufactured by YAMADA CORPORATION INTERNATIONAL DEPARTMENT No 1 3 1 Chome Minami Magome Ohta Ku Tokyo 143 8504 Japan PHONE 81 0 3 3777 0241 FAX 81 0 3 3777 0584 201804 NDP306M...
