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Summary of Contents for YAMADA Global Series
- Page 1 Doc. No. NDP 582M-00 MAINTENANCE MANUAL...
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Page 2: Warnings And Cautions
After reading this document, be sure to keep it handy for future reference. These maintenance manuals cover what you should know about maintenance of the Yamada G50A_ Diaphragm Pumps. This edition is based on the standards for the May 2024 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 and Valve seats 4.1 Removal ·············································································... -
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 And Valve Seats
4. Balls and Valve seats 4.1 Removal ▪ Remove the Silencer and Air valve out manifold ▪ Remove the 8 retainer bolts from the out manifold, and remove the out manifold. <Fig.4.1> Fig.4.1 ▪ Remove the ball, O ring (excluding AN type) and valve seat. <Fig.4.2>... -
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 Sø56.7 - Sø64.9 mm 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 balls and valve seats etc. (see “4.1 Removal) out chamber ▪ Remove the 16 retainer bolts from the out chamber, and remove the out chamber. <Fig.5.1> Fig.5.1 ▪ Remove the center disk (outside) from one side. <Fig.5.2> ▪... -
Page 8: Inspection
5.2 Inspection ▪ Diaphragm If the diaphragm is worn out or damaged, both of the diaphragms should be replaced at one time. Please replace it together with the backup diaphragm (only AT type). Frequency of inspecting the diaphragms （Transferring water at room temperature） 7,000,000 cycle NBR, TPEE, TPO PTFE... - Page 9 crowbar crowbar crowbar crowbar Fig.5.8 ■ AT type For installation, see [Exploded View] on the separate sheet and install in the reverse order of disassembly. ▪ Apply assembly grease to the center rod, and insert it into backup diaphragm the main body. diaphragm ▪...
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Page 10: Throat Bearing And Pilot Valve Assembly
6. Throat bearing and Pilot valve assembly 6.1 Removal ▪ Remove the diaphragm and center rod (see “5.1 Removal”). ▪ Remove the 12 retainer bolts from the air chamber, and remove the air chamber. <Fig.6.1> air chamber Fig.6.1 ▪ Remove the gasket. <Fig.6.2> gasket ▪... -
Page 11: Installation
6.3 Installation For installation, see [Exploded View] on the separate sheet and install in the reverse order of disassembly. Tightening torque for air chamber retainer bolts 20 N-m <NOTE> ▪ Make sure there is no dust on the seal surface and the seal is not damaged. -
Page 12: Inspection
7.2 Inspection ▪ C Spool valve assembly Seal ring <Fig.7.4> Measure the inside thick diameter, and if it is outside the usable range, replace the C spool valve assembly. If the seal ring is worn out or cracked, replace C spool valve assembly. -
Page 13: Retightening Of Tie Rods
8. Retightening of Tie rods ▪ All bolts should be retorqued: manifold (1) Right before start up. (2) There are any leaks of material on daily inspecting a pump. <NOTE> out chamber ▪ Retighten the out chamber and then the manifold in this order. - Page 14 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 YAMADA (THAILAND) CO., LTD 41/79 Moo 6, Bangcha-long,Bangplee,Sumutprakarn10540,Thailand PHONE : +66-(0)2-130-0990 : +66-(0)2-130-0993 E-mail : sales@yamada-th.com 202405.2789 NDP582M...
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