Graymills DDP .375' Pump OMI User Manual

795–90857GM 6–02GraymillsPOLYPROPYLENEAir OperatedDouble Diaphragm Pumps3/8" ModelOperations and Maintenance Instructions100 psi (0.7 MPa, 7 bar)

10InstallationAir Exhaust VentilationFIRE AND EXPLOSION HAZARDBe sure to read FIRE OR EXPLOSIONHAZARD and TOXIC FLUID HAZARDon page 2, before operatin

11OperationPressure Relief ProcedurePRESSURIZED EQUIPMENT HAZARDThe system pressure must be manually relieved to pre-vent the system from starting or

12TroubleshootingWARNINGTo reduce the risk of serious injury whenever you areinstructed to relieve pressure, always follow the Pres-sure Relief Proced

13TroubleshootingPROBLEM CAUSE SOLUTIONThere are air bubbles in the fluid. The suction line is loose, or there is alack of thread sealant.Tighten the

14MaintenanceLubricationThe air valve is designed to operate unlubricated, howeverif lubrication is desired, every 500 hours of operation (ormonthly)

15Notes

16ServiceReplacing the Air ValveTools RequiredD Torque wrenchD Phillips screwdriverD O-ring pickNOTE: Order Kit #784-90865Parts included in the kit ar

17Service01436BFig. 10132{21014581VALVE PLATE DETAILGREASE APPLICATION19{15Torque oppositely and evenly to 8 to 14 in-lb (0.9 to 1.6 N-m).Torque to 5

18ServiceRepairing the Air ValveTools RequiredD Torque wrenchD Phillips screwdriverD O-ring pickD Rubber malletDisassemblyWARNINGTo reduce the risk of

19ServiceReassembly1. If the detent collar (7) was removed, carefully install anew collar in a new cover (2), using a rubber mallet.See Fig. 12.2. Gre

2Table of ContentsSafety Warnings 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Technical Data 4. . . . . . . . . . . . . . . .

20Service8. Grease the inside surfaces of the shift saddle (14) andinstall it as shown in Fig. 14. Hold the link assemblyfirmly in place and install t

21ServiceBall Check ValvesTools RequiredD Torque wrenchD 1/2” (13 mm) socket wrenchD O-ring pickNOTE: A Fluid Section Repair Kit is available. See pag

22Service02457CFig. 15102101102107201*202*201*202*106106301*108*108*301*108*108*1324 54 5321046102101102107201*202*201*202*106106301*108*301*108*1324

23ServiceDiaphragm RepairTools RequiredD Torque wrenchD One 7/16” (11 mm) and two 1/2” (13 mm) socket wrenchesD Phillips screwdriverD O-ring pickD 13/

24ServiceReassembly1. Install the shaft seals (30}) in the housing (1). Using arubber mallet, carefully drive the bearings (31}) flushinto the housing

25Notes

26134201441C01442102101106102107112*401118402*1113/32 IN. EZY-OUT01443CUTAWAY VIEW OF DIAPHRAGMASSEMBLIES IN PUMP HOUSING131}DETAIL OF BEARING REMOVAL

27PartsAir Motor Parts List (Matrix Column 2)DigitRef.No.Part No. Description Qty3 1 HOUSING, center;polypropylene; see page 2812{ COVER, air valve; p

28Parts* Included in Pump Repair Kit, which may be purchasedseparately.{ Included in Air Valve Kit #784-90865 which may be pur-chased separately.

29Performance Chart – pumps with Teflon Diaphragms020406080100120012345678TEST CONDITIONSPump tested in water with inlet submerged.(7.6) (15.2) (22.7)

3EQUIPMENT MISUSE HAZARDAny misuse of the equipment or accessories, such as overpressurizing, modifying parts, using incompatiblechemicals and fluids,

30Performance Charts – pumps with Hytrel Diaphragms020406080100120012345678TEST CONDITIONSPump tested in water with inlet submerged.(7.6) (15.2) (22.7

31DimensionsPUMP MOUNTING HOLE PATTERNSIDE VIEW5 in.(127 mm)0654WALL BRACKET 224-835Four 0.438 in. (11 mm) dia. holes(to mount bracket to wall)9.0 in.

32WARRANTYGraymills Corporation warrants that the equipment manufactured anddelivered, when properly installed and maintained , shall be free fromdefe

4CAUTIOND Verify the chemical compatibility of the pump wetted parts and the substance being pumped, flushed orrecirculated. Chemical compatibility ma

5InstallationGeneral InformationD The Typical Installations in Fig. 5 to Fig. 7 are onlyguides for selecting and installing system components.Contact

6InstallationGroundingFIRE AND EXPLOSION HAZARDThis pump must be grounded. Before oper-ating the pump, ground the system asexplained at right. Also re

7InstallationAir LineA bleed-type master air valve (B) is required in yoursystem to relieve air trapped between this valve and thepump. See Fig. 5 to

8InstallationChanging the Orientation of the Fluid Inletand Outlet PortsThe pump is shipped with the fluid inlet and outlet portsfacing the same direc

9InstallationFig. 5BUNG-MOUNT TRANSFER INSTALLATION01444BYJCNLFHBEKEYA 3/8” Diaphragm PumpB Bleed-Type Master AirValve(required for pump)C Air Supply