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MAINTENANCE MANUAL

YAMADA AIR-OPERATED DOUBLE DIAPHRAGM PUMP

DP-10Fs
DP-20Fs

Doc. No.

NDP150M-09

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Summary of Contents for DP-Fs Series

Page 1: ...MAINTENANCE MANUAL YAMADA AIR OPERATED DOUBLE DIAPHRAGM PUMP DP 10Fs DP 20Fs Doc No NDP150M 09 ...

Page 2: ...voided will result in death or serious injury CAUTION This indicates the existence of potential hazard which if not avoided may result in bodily injury or in physical damage To indicate the contents of danger and damage the following symbols are used together with the above indications This symbol indicates an act that is prohibited prohibition The concrete contents of prohibition are indicated by...

Page 3: ...Ball and Valve Seats 4 1 Removal 3 4 2 Inspection 4 4 3 Installation 4 5 Valve Body Assembly and C Spool Valve Assembly 5 1 Removal 5 5 2 Inspection 6 5 3 Installation 7 6 Diaphragm Center Rod and Bush 6 1 Removal 8 6 2 Inspection 9 6 3 Installation 10 7 Pilot Valves Valve Seats and Spring 7 1 Removal 11 7 2 Inspection 11 7 3 Installation 11 8 Retightening of Tie rods 12 9 Instructions for applyin...

Page 4: ... center rod moves to the left The material in material chamber A is pushed out and at the same time material is sucked into material chamber B Through repetition of this operation material is repeatedly taken in and discharged out 2 Maintenance and Tools 2 1 Maintenance Pump maintenance is recommended after each of the following periods Estimated inspection timing Based on water at room temperatur...

Page 5: ...moving a ring Part No 832802 for DP 10Fs Part No 832803 for DP 20Fs 2 4 Others Assembly lubricating oil oil Fomblin Y25 or equivalent Assembly lubricating oil grease Fomblin GR AR555 or equivalent Nuts M12 1 75 DP 10Fs M14 1 5 DP 20Fs 3 Ordering Replacement parts For accurate and speedy shipment of parts be sure to order the right parts for your model to distributor Indicate the part numbers descr...

Page 6: ... nuts 4 retainer nuts on the up and down sides respectively from the both sides of the upright tie rod the in manifold is removed from the main body also Fig 4 1 NOTE Since the manifold is designed to be disassembled easily be careful to remove it from the main body so that you cannot happen to drop any of its parts Fig 4 2 Remove the valve stopper ball valve seat and O ring Fig 4 3 Turn over the ...

Page 7: ... Allowable range of the valve seat DP 10Fs 4 6 7 8 mm DP 20Fs 4 8 8 2 mm 4 3 Installation For installation see Exploded View on the separate sheet and install in the reverse order of disassembly Tightening torque for vertical tie rod 2 N m NOTE Make sure that there is not any dust on the seal surface and that any sealed part cannot be damaged Replace the locking nut with a new one regardless of it...

Page 8: ...the 4 retainer nuts from the valve body and then the valve body itself Fig 5 1 Use the dedicated tool pilot valve remover to remove the caps located on the both sides of the valve body Fig 5 2 Use a plyer to pull out the C spool valve assembly Fig 5 3 Use the dedicated tool sleeve remover to remove the sleeve from the valve body Fig 5 4 ...

Page 9: ...e opening and pushing the groove of the interlocking bush Fig 5 7 and 5 8 NOTE Do not exert any excessive force to the spool Do not open the groove of the interlocking bush more widely than it has to When you remove the interlocking bush the spring retaining cushion is removed also 5 2 Inspection Spool Fig 5 9 Measure the outside diameter and if it is out of the allowable range replace the spool w...

Page 10: ...ing bush with a new one Usable range of Interlocking bush Part to measure a 4 8 5 0 mm Part to measure b 6 8 7 1 mm Arm Fig 5 13 Measure the dimension shown on the left figure and if it is out of the allowable range replace the arm with a new one Usable range of Arm 10 5 10 9 mm Spring bearing Fig 5 14 If the spring bearing is worn out or cracked replace it with a new one Cushion Fig 5 14 If the c...

Page 11: ...the reinforcements plate and out chamber Fig 6 2 While fixing one diaphragm turn another diaphragm until it is removed Fig 6 3 After one diaphragm is removed remove another diaphragm and center rod from the body Remove the packing wiper from the body Fig 6 4 While fixing the middle section of the center rod turn the diaphragm until it is removed Fig 6 5 If necessary attach a double nut to the scre...

Page 12: ... range replace the center rod with a new one Allowable range DP 10Fs φ15 92 φ15 98 mm DP 20Fs φ17 92 φ17 98 mm Body Fig 6 8 Measure the inside diameter and if it is out of the allowable range replace the sleeve with a new one Allowable range DP 10Fs φ16 03 φ16 11 mm DP 20Fs φ18 03 φ18 11 mm Packing Wiper If the packing is worn out or damaged replace it with a new one Fig 6 7 Fig 6 8 ...

Page 13: ...e of the body Be sure to attach the O ring over the groove Fig 6 11 While turning the diaphragm fix it onto the screw of the center rod Fig 6 11 NOTE Be sure to insert the diaphragm into the body until it reaches the end face of the body securely While pushing the diaphragm toward the outside attach the O ring onto the groove Fig 6 12 NOTE After attaching the O ring be sure to push the diaphragm t...

Page 14: ...seat with a new one Allowable range φ7 0 φ7 2 mm Spring Fig 7 1 Be sure to replace the spring with a new one when disassembling the pump regardless of its condition O ring Fig 7 1 If the O ring is worn out or damaged replace it with a new one 7 3 Installation For installation see Exploded View on the separate sheet and install in the reverse order of disassembly NOTE Be careful not to remove the O...

Page 15: ...tion if any leak of liquid or material is detected with the daily inspection Retightening torque of the tie rods Horizontal tie rods Vertical tie rods 4 N m 2 N m NOTE Retighten the tie rod retainer nuts with even force Retighten the horizontal tie rods and then the vertical tie rods in this order Fig 8 1 9 Instructions for applying lubrication 9 1 Applying lubricant to the Packing Apply plenty of...

Page 16: ... 8504 Japan PHONE 81 0 3 3777 0241 FAX 81 0 3 3777 0584 E mail intl yamadacorp co jp Web www yamadacorp co jp YAMADA THAILAND CO LTD 41 79 Moo 6 Bangcha long Bangplee Sumutprakarn10540 Thailand PHONE 66 0 2 130 0990 FAX 66 0 2 130 0993 E mail sales yamada th com 202009 2479 NDP150M ...

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