1. DL manuals
  2. YAMADA
  3. Water Pump
  4. NDP-15 series
  5. Maintenance Manual

YAMADA NDP-15 series Maintenance Manual

Other manuals for NDP-15 series: Operation Manual
Manual is about: AIR-OPERATED DIAPHRAGM PUMPS

Summary of NDP-15 series

  • Page 1

    Maintenance manual yamada air-operated double diaphragm pump ndp-5 ndp-15 doc. No. Ndp 183m-09.

  • Page 2

    Warning • for your own safety, be sure to read these procedures carefully before performing maintenance on this product. After reading this document, be sure to keep it handy for future reference. This maintenance manual covers what you should know about maintenance of the yamada ndp-5 series and nd...

  • Page 3

    Table of contents ·warnings and cautions ·table of contents 1.Principles of operation ------------------------------------------------------------ 1 2.Tools, etc. 2.1 general tools ----------------------------------------------------------------------- 1 2.2 special tools ---------------------------...

  • Page 4

    1 1.Principles of operation there are two diaphragms fixed to the center rod, one at each end. When compressed air is supplied to air chamber b (right side, see fig. 1.1), the center rod moves to the right, the material in material chamber b is pushed out, and at the same time material is sucked int...

  • Page 5: ■

    2 4. Balls, flat valves and valve seats 4.1 removal ■ fat, fst, ba □ , bs □ , bps types ▪ remove the 4 retainer bolts from the out manifold, and remove the out manifold. [fig.4.1] ▪ remove the o ring, valve stopper, valve guide, flat valve and valve seat. (ndp-5) [fig.4.2] ▪ remove the o ring, valve...

  • Page 6: ■

    3 ■ fp □ , fv □ , fdt types ▪ remove the 4 retainer nuts from the out manifold, and remove the out manifold. [fig.4.5] note > ▪ when the retainer nuts both side of the tie rod remove, the in manifold removes.( ndp-5 ) ▪ remove the o ring, valve stopper, flat valve and valve seat. [fig.4.6] ▪ turn ov...

  • Page 7: ■

    4 4.2 inspection ■ ball valve type ▪ ball [fig.4.9] measure the outside diameter, and if it is outside the usable range, replace the ball. Usable range of ball ndp-15 s Ø 20.0 ~ s Ø 22.8 mm ▪ valve seat [fig.4.10] measure the dimension shown at left, and if it is outside the usable range, replace th...

  • Page 8: ■

    5 5. Diaphragm and center rod 5.1 removal ■ fat, fst, ba □ , bs □ , bps types ▪ remove the ball or flat valve and valve seat (see [4.1 removal fat, fst, ba □ , bs □ , bps types]). ▪ remove the 8 (12 on the ndp-15) retainer bolts from the out chamber, and remove the out chamber. [fig.5.1] ▪ remove th...

  • Page 9: ■

    6 ■ fp □ , fv □ , fdt types ▪ remove the flat valve and valve seat (see [ 4.1 removal fp □ , fv □ , fdt types] on p.3). ▪ remove the 8 (12 on the ndp-15) retainer nuts from the out chamber, and remove the out chamber. [fig.5.4] ▪ remove the center disk using the cap and disk remover. (special tool: ...

  • Page 10: ■

    7 5.3 installation ■ b □ h, b □ s, fph, fps types for installation, see [exploded view] on the separate sheet and install in the reverse order of disassembly. ▪ apply grease to the center rod, and insert it into the main body. ▪ keep the convex side to the outside. ▪ tighten the center disk using th...

  • Page 11: ■

    8 6.Pilot valve assembly, guide and bushing 6.1 removal ■ ndp-5 ▪ remove the diaphragm and center rod etc.(see [5.1 removal] on p.5) ▪ remove the main body. [fig.6.1] ▪ draw out the pilot valve assembly. [fig.6.1] ▪ remove the packing and bushing. [fig.6.1] ■ ndp-15 ▪ remove the diaphragm and center...

  • Page 12

    9 7. C spool valve assembly and sleeve assembly 7.1 removal ▪ remove the cap using the cap and disk remover (special tool: part no. 771132). [fig.7.1] ▪ draw out the c spool valve assembly using the plyer, and remove the seal ring from the c spool valve assembly. [fig.7.2] ▪ remove the sleeve using ...

  • Page 13

    10 8. Retightening of tie rods ▪ the torque should be applied on the occasion of (1) right before the pump to use. (2) there are any leaks of material on daily inspecting a pump. Retainer bolts from the out chamber retainer bolts from the manifold ndp-5 fpt, fvt, fdt 7.5 n•m 7.5 n•m ndp-15 fp □ , fv...

  • 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 201710 ndp183m.