YAMADA NDP-20 series Maintenance Manual Download | Manualshive

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MAINTENANCE MANUAL

YAMADA AIR-OPERATED DIAPHRAGM PUMPS

NDP-20
NDP-25

NDP-32

Doc. No. NDP 187M-10

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Summary of Contents for NDP-20 series

Page 1: ...MAINTENANCE MANUAL YAMADA AIR OPERATED DIAPHRAGM PUMPS NDP 20 NDP 25 NDP 32 Doc No NDP 187M 10...

Page 2: ...e 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...

Page 3: ...2 BP BV types 3 4 2 Inspection 4 4 3 Installation 4 5 Diaphragm and Center rod 5 1 Removal BA D BS BF types 5 BP BV types 5 5 2 Inspection 6 5 3 Installation B C D B N D B E B V B H D B S B H T types...

Page 4: ...cked into material chamber B Through repetition of this operation material is repeatedly taken in and discharged out 2 Tools etc 2 1 General tools Socket wrenches 10mm 12mm 13mm 17mm 22mm Hexagonal bo...

Page 5: ...he out manifold Fig 4 1 Remove the O ring valve stopper ball and valve seat Fig 4 2 Turn over the main body assembly Fig 4 3 Remove the 4 retainer bolts from the in manifold and remove the in manifold...

Page 6: ...OTE When the retainer nuts both sides of the tie rod remove the in manifold removes Remove the O ring valve stopper ball and valve seat Fig 4 6 Turn over the main body assembly Fig 4 7 Pull out the ti...

Page 7: ...out or cracked replace them 4 3 Installation For installation see Exploded View on the separate sheet and install in the reverse order of disassembly Tightening torque for manifold retainer bolts C N...

Page 8: ...Fig 5 2 After the nuts on one side have been removed remove the center disk and diaphragm Remove the diaphragm center disk and center rod from the opposite side of the main body Remove the nuts on the...

Page 9: ...the diaphragm and center disk off the opposite end Fig 5 6 Be careful not to scratch or score the center rod 5 2 Inspection Diaphragm If the diaphragm is worn out or damaged replace it New replace jus...

Page 10: ...B C B N B E B V 10 N m NDP 20 B H B S B H T 13 N m B C B N B E B V 10 N m NDP 25 NDP 32 B H B S B H T 20 N m NOTE Make sure there is no dust on the seal surface in order to prevent seal damaged Tighte...

Page 11: ...g 6 4 Measure the inside diameter and if it is outside the usable range replace the throat bearing Usable range of throat bearing 18 03 18 14 mm O rings Packing If the O ring is worn out or cracked re...

Page 12: ...acked replace C Spool Valve Assembly Usable range of Seal ring 2 94 3 02 mm Sleeve Assembly Fig 7 5 Measure the inside diameter and if it is outside the usable range replace the sleeve assembly Usable...

Page 13: ...lance should be equal from both side on diagonal line with even torque Retighten the Out chamber and then the manifold in this order Fig 8 1 Plastic type The torque should be applied on the occasion o...

Page 14: ...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 201612 NDP187M...

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