background image

795–08690

GM 12–00

Graymills

Air Operated
Double Diaphragm Pumps

1/4" Model

Operations and
Maintenance
Instructions

WARNING/CAUTIONS

Read all these SAFETY INSTRUCTIONS
BEFORE installing or using this equip-
ment. Keep this manual handy for refer-
ence/training.

Contents

Warnings 2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Installation 4

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Technical Data

5

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Operation

7

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Maintenance

8

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Troubleshooting

9

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Service

10

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Dimensions and Mounting Hole Layout

12

. . . . . . . . . . . . . 

Performance Charts

12

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Graymills Standard Warranty

12

. . . . . . . . . . . . . . . . . . . . . 

Graymills Corporation

  3705 N. Lincoln Avenue  Chicago, Illinois  60613

 773/248–6825  FAX 773/477–8673   www.graymills.com

Summary of Contents for 795-08690

Page 1: ...or using this equip ment Keep this manual handy for refer ence training Contents Warnings 2 Installation 4 Technical Data 5 Operation 7 Maintenance 8 Troubleshooting 9 Service 10 Dimensions and Mounti...

Page 2: ...ng pressure at 100 psi 0 7 MPa 7 bar maximum incoming air pressure D Be sure that all fluids and solvents used are chemically compatible with the wetted parts shown in the Technical Data on page 5 Alw...

Page 3: ...See Air Exhaust Ventilation on page 4 D Use static wire hoses when pumping flammables D Keep containers closed when not in use WARNING CAUTION D Verify the chemical compatibility of the pump wetted pa...

Page 4: ...our area and type of equipment Note This pump is shipped with an optional 90_ mounting bracket In applications where priming is problematic use this bracket to mount the pump horizontally to improve p...

Page 5: ...air inlet 3 Do not restrict the exhaust port Excessive exhaust restriction can cause erratic pump operation Fluid Lines Fig 1 On each end of the fluid manifold are a fluid IN port and a fluid OUT por...

Page 6: ...ation the pump must exhaust through the solenoid Failure to exhaust through solenoid could cause the diaphragms to fail CAUTION 06504 Figure 2 KEY A 1 4 DDP pump B Bleed type master air valve required...

Page 7: ...g the Pump Starting and Adjusting the Pump WARNING To reduce the risk of serious injury splashing in the eyes or on the skin and toxic fluid spills never move or lift a pump under pressure If the pump...

Page 8: ...use varies a general guideline is to retorque fasteners every two months See the Service section for torque specifications Flushing and Storage Flush the pump to prevent the fluid from drying or free...

Page 9: ...diaphragm 30 is ruptured Contact Graymills A diaphragm plate 50 is loose Tighten the diaphragm plate See page10 The pump exhausts air near the fluid covers The fluid covers 51 are loose or the o rings...

Page 10: ...pressure and disconnect air line from the pump WARNING To reduce the risk of serious injury whenever you are instructed to relieve pressure always follow the Pres sure Relief Procedure on page 7 2 Rem...

Page 11: ...lift the manifold covers center housing assembly off of the manifold 52 3 Remove and replace the check valves 20 being careful to orient each check valve exactly like the one it is replacing Make sure...

Page 12: ...opera tor carelessness mis use improper application or installation abnormal use use of add on parts or equipment which damages or impairs the prop er function of the unit and modifications made to th...

Reviews: