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Related Manuals for YAMADA Global Series
Summary of Contents for YAMADA Global Series
- Page 1 Doc. No. NDP 540M-03 MAINTENANCE MANUAL...
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Page 2: Warnings And Cautions
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 G25A□ Diaphragm Pumps. This edition is based on the standards for the April 2021 production run. Remember, the specifications are always subject to change;... -
Page 3: Table Of Contents
Table of Contents ·Warnings and Cautions ·Table of Contents 1.Principles of operation ------------------------------------------------------------ 1 2. Maintenance and Tools 2.1 Maintenance ----------------------------------------------------------------------- 1 2.2 General tools ----------------------------------------------------------------------- 1 2.3 Special tools ------------------------------------------------------------------------ 1 2.4 Misc. --------------------------------------------------------------------------------- 1 3.Ordering Replacement parts --------------------------------------------------- 1 4.Balls, Valve seats 4.1 Removal ----------------------------------------------------------------------------- 2 4.2 Inspection -------------------------------------------------------------------------- 3... -
Page 4: Principles Of Operation
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 into material chamber A. -
Page 5: Balls, Valve Seats
4. Balls, Valve seats 4.1 Removal ▪ Remove 4 mounting bolts from upper manifold and remove the manifold. [Fig.4.1] Fig.4.1 ▪ Remove the O ring, ball, valve seat. [Fig.4.2] Fig.4.2 ▪ Turn over the main body assembly. [Fig.4.3] ▪ Remove 4 mounting bolts from lower manifold and remove the base and the manifold. -
Page 6: Inspection
4.2 Inspection ▪ Ball [Fig.4.5] Measure the outside diameter, and if it is outside the usable range, replace the ball. Usable range of Ball 24.3 - S 27.8 mm Ø Ø Fig.4.5 ▪ Valve seat [Fig.4.6] Measure the dimension shown at left, and if it is outside the usable range, replace the seat. -
Page 7: Diaphragm And Center Rod
5. Diaphragm and Center rod 5.1 Removal ▪ Remove the O ring, ball, valve seat (see “ 4.1 Removal”). ▪ Remove the 12 retainer bolts from the out chamber, and remove the out chamber. [Fig.5.1] Fig.5.1 ▪ After the center disk on one side have been removed using the spanner 22 mm etc., remove the center disk and diaphragm. -
Page 8: Installation
5.3 Installation For installation, see [Exploded View] on the separate sheet and install in the reverse order of disassembly. ■AN type ▪ Apply grease to the center rod, and insert it into the main body. ▪ Keep the convex side to the outside for diaphragm. ▪... -
Page 9: Guide Bush
6. Guide Bush 6.1 Removal ▪ Remove the diaphragm and center rod etc. (see “5.1 Removal”). ▪ Remove 8 mounting bolts from the air chamber and remove the air chamber and the gasket. [Fig.6.1] ▪ Draw out the guide bush A, B, C. [Fig.6.1] Fig.6.1 6.2 Inspection ▪... -
Page 10: Spool Valve Assembly And Sleeve
7. Spool valve assembly and Sleeve 7.1 Removal ▪ Remove 4 bolts fixing the valve body assembly and draw out the valve body assembly from the main body. [Fig.7.1] Fig.7.1 ▪ Remove the cap A using the cap remover. (special tool: Part No. 717114). [Fig.7.2] Fig.7.2 ▪... -
Page 11: Inspection
7.2 Inspection ▪ Spool valve assembly Seal ring [Fig.7.5] Measure the outside diameter of the seal ring, and if it is outside the usable range, replace the Spool valve assembly. If the seal ring is worn out or cracked, replace Spool valve assembly. - Page 12 YAMADA EUROPE B.V . Aquamarijnstraat 50,7554 NS Hengelo (O),The Netherlands PHONE : +31-(0)74-242-2032 : +31-(0)74-242-1055 E-mail : sales@yamada.nl : www.yamada-europe.com Manufactured by YAMADA CORPORATION INTERNATIONAL DEPARTMENT 1-1-3, Minami-Magome,Ota ku, Tokyo, 143-8504, Japan PHONE : +81-(0)3-3777-0241 : +81-(0)3-3777-0584 E-mail : intl@yamadacorp.co.jp : www.yamadacorp.co.jp...