MAINTENANCE MANUAL
YAMADA AIR-OPERATED DOUBLE DIAPHRAGM PUMP
NDP-H40 NDP-H50
NDP-H80
Doc. No. NDP 306M-06
Страница 1: ...MAINTENANCE MANUAL YAMADA AIR OPERATED DOUBLE DIAPHRAGM PUMP NDP H40 NDP H50 NDP H80 Doc No NDP 306M 06 ...
Страница 2: ...ignore 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 symbols are also used along with those mentioned above This symbol indicates a DON T and will be accompanied by an explanation on something you must not do This symbol indicates a DO and will be accompan...
Страница 3: ...es 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 type 8 6 Throat bearing and Pilot valve assembly 6 1 Removal 9 6 2 Inspection 9 6 3 Installation 9 7 Valve Body Assembly 7 1 Removal 10 7 2 Inspection 11 7 3 Installation 11 8 Valve switcher 8 1 Removal...
Страница 4: ...rough 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 wrenches 5mm 6mm Small crowbars 2 B C B N B E B V Open end wrenches 17mm NDP H40 BP 19mm BA BS BF 24mm BA BS BF Phillips head screw driver 2 2 Special tools PP wrench sold separately Socket for a gu...
Страница 5: ...NDP 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 remove the in manifold Fig 4 1 Remove the ball valve seat and O ring Fig 4 3 ...
Страница 6: ...olts 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 Remove the ball valve seat and O ring Fig 4 6 ...
Страница 7: ...ove 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 protector and in manifold Fig 4 7 Remove the ball valve guide only NDP H80 valve seat and O ring Fig 4 9 ...
Страница 8: ...ve seat 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 see Exploded View on the separate sheet and install in the reverse order of disassembly NOTE Make sure there is no dust on the seal surface and the seal is not damaged Match the convex and concave p...
Страница 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 spring center disk diaphragm and center bushing Fig 5 3 NOTE Be careful not to damage the center rod and center bushing BP type Remove the ball etc see 4 1 Removal BP type on P 3 4 Remove the 8 4 on the...
Страница 10: ...s outside the usable range replace the rod Usable range of center rod Ø 17 93 Ø 18 00 mm Center bushing Fig 5 9 Measure the diameter and if it is outside the usable range replace the rod Usable range of center bushing Ø 24 93 Ø 25 00 mm 5 3 Installation B C B N B E B V B H B S B H T types For installation see Exploded View on the separate sheet and install in the reverse order of disassembly Apply...
Страница 11: ...t 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 bushing and then attach it to the center rod Keep the convex side to the outside cf Fig 5 14 Put the O rings to both sides of the diaphragm cf Fig 5 14 Tighten the center disk using the PP wrench special t...
Страница 12: ...de diameter and if it is outside the usable range replace the throat bearing Usable range of throat bearing Ø 25 04 Ø 25 15mm O ring If the O ring is worn out or cracked replace it 6 3 Installation For installation see Exploded View on the separate sheet and install in the reverse order of disassembly Screw the throat bearing all the way into the air chamber and them back it to align the bolt hole...
Страница 13: ...olts 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 Use thread locker Tightening torque 3Nm Remove the valve seat and gasket Fig 7 3 ...
Страница 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 Ball If the Gasket and Ball are worn out or cracked replace them NOTE Apply enough grease urea to the spring and ball 7 3 Installation For installation see Exploded View on the separate sheet and inst...
Страница 15: ...them 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 outside the usable range replace the throat bearing Usable range of sleeve Inside diameter 7 5 mm 8 1 mm Outside diameter 11 5 mm 12 mm Valve switcher Fig 8 4 Measure the inside diameter and if it is ou...
Страница 16: ...der 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 order Fig 9 2 Tighten the bolts in the order shown Retain bolts for the out chamber Retain bolts for the manifold NDP H40 NDP H50 NDP H80 BP 35 N m 20 N m Retain bolts for the out chamber Retain bolts fo...
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Страница 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 ...
