Series EXPSection No. 6.4

EXP Solar and AC-Powered Chemical Injection Pump for Class I, Division 2 Hazardous Locations with DigiMax ADC ControlApplicationThe WellMark EXP Class I, Div. 2 Solar-Electric Chemical InjectionPump provides an environmentally-clean method for injection ofchemical into a line under pressure. It is a positive-displacementdesign, powered by an electric motor, thereby eliminating the gasemissions inherent with pneumatic-style pumps. Applicationsinclude injection of methanol, corrosion inhibitors, friction reducersor scale inhibitors into wellheads or pipelines. A unique TemperatureSensor allows the operator to set a temperature threshold to disal-low pumping until the temperature falls to a specified level.

SpecificationsConnectionsPump Inlet and Outlet . . . . . . . . . . . . . . . . . 1/4" Female NPT

PumpFluid Head . . . . . . . . . . . . . . . . Stainless Steel, Single or Dual12 VDC Gearmotor Size . . . . . . . . . . . . . . . . . . . 1/6hp, 64rpm120 VAC Gearmotor Size . . . . . . . . . . . . . . . . . . 1/3hp, 60rpmAvailable Plunger Sizes . . . . . . . . . . . . . . . . . . 1/4", 3/8", 1/2"

3-Position Adjustable DisplacementHazardous Location Rating • Class I, Division 2Certifying Body . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Intertek

Power • DCAvailable Solar Panels . . . . . . . . . Single or Multiple, 80 WattBattery(s) . . . . . . . . . . . . . . . . . . . . . . . . . Single or Multiple

110 Amp Hour Deep CycleGeneralControl . . . . . . . . . . . . . . . . . . . . DigiMax ADC Digital Display

with Auto Mode, Voltage Monitor, Temperature Sensor,Manual Pump Override, Fuse Protected

Mounts . . . . . . . . . . . . . . . . Mast with Quad Legs (Standard)Skid Mount (Optional)

Principle of OperationAny chemical injection pump utilizing a photovoltaic power system must manage numerous variables in an attempt to maintain ade-quate power for the task at hand. Among those variables are:• Available Sunlight• Size and Capability of the Solar Panel• Size of the Battery or Batteries• Power Draw of the Motor• Size/Displacement of the Plunger• Required Discharge Pressure of the Pump

All of these variables must be considered when sizing a photo-voltaic pump system.

Unit Positioning and Panel Tilt AdjustmentRegional information about available sunlight can be found athttp://www.nrel.gov/gis/solar.html. Further evaluation of the spe-cific site may be necessary to maximize clear presentation of thesolar panel to the sun. Any adjacent items that may casts shadowson the panel throughout the day will negatively affect the overallperformance of the package. Maximum exposure will help to assurethat the battery maintains enough power to drive the pump through-out the night. To get the most from position-fixed (or seasonallyadjusted) photovoltaic solar panels, you need to point them in thedirection that captures the most sun. Solar panels should alwaysface true south in the Northern Hemisphere and north in theSouthern Hemisphere, tilted from the horizontal at a degree equal toyour latitude plus 15 degrees in winter, or minus 15 degrees insummer. An additional 3- 5% can be gained by evaluating this morecarefully and fine-tuning adjustments accordingly.

Solar-Powered ModelShown with skid mount, double battery and single solar panel.

AC-Powered Model

The Company • Oklahoma City, Oklahoma • Tel: (405) 672-6660 • Fax: (405) 672-6661 • wellmarkco.com©2015 The WellMark Company • Litho USA • WMEXP-SOLAR/AC-04/15 • All registered trademarks are the property of their respective owners. 13

Pump OverrideRuns pump continuously, overriding the program until the button ispressed again or until the pump runs for 2 minutes.

Temperature SensorThe Control Timer is equipped with a Temperature Sensor feature.When actvivated this feature turns the pump off until the temperaturedrops to a set temperature threshold or lower, regardless of programsettings. This allows the user to minimize the waste of methanol byonly pumping during conditions approaching freezing temperatures.

Pump SelectionA wide ratio between OFF time and RUN time (OFF:RUN) will usual-ly result in maximized efficiency of the battery/solar charging system.For example: 30 seconds OFF time versus 5 seconds RUN timewould result in a ratio of 6:1. Ratios lower than 2:1 may result inprogressive loss of battery charge, depending upon available sun-light and differential pumping pressure.As reviewed against the “Pump Displacement & Timer Settings”charts, (refer to Installation, Operation & Maintenance Instructions forSolar and AC-Powered Chemical Injection Pumps) the pumps' requiredrate should optimally fall within the middle of the pumps' capacityrange. This gives room for adjustment if the service criteria changes.

OperationThe WellMark Solar and AC-Powered Chemical Injection Pumps feature a control timer that allows a broad range of operating con-ditions. The pump head can be adjusted for one of three differentdisplacement settings. Control of fluid volume can be achieved byutilizing an infinite number of combinations of RUN and OFF timesalong with three different displacement settings. Suggested set-tings for common volumes are listed on included charts.

DigiMax ADC Control/TimerProgram FunctionsAuto ModeAfter a one-time setup, this feature allows the operator to simplyenter the number of quarts desired per day - No need to consult RUNTIME and OFF TIME charts. The DigiMax ADC is programmed to behassle-free. Of course, Manual Mode is available allowing the userto manually set the control if desired.In Auto Mode Digital Display continuously indicates settings:• Plunger Size and Pin Setting• Battery Voltage• Temp. Settings (ON/OFF, Temp. Threshold Setting and Current)• Pump Rate (Quarts per Day)

In Manual Mode Digital Display continuously indicates settings:• RUN Time• OFF Time• Cycle Cvount• Battery Voltage• Temp. Settings (ON/OFF, Temp. Threshold Setting and Current)

Pin position (1, 2 or 3) determines displacement (see charts).Factory preset is Position 3.

123 321

123 321

The Company • Oklahoma City, Oklahoma • Tel: (405) 672-6660 • Fax: (405) 672-6661 • wellmarkco.com14 ©2015 The WellMark Company • Litho USA • WMEXP-SOLAR/AC-04/15 • All registered trademarks are the property of their respective owners.

Series EXPSection No. 6.4

EXP Solar and AC-Powered Chemical Injection Pump for Class I, Division 2 Hazardous Locations with DigiMax ADC Control

Series EXPSection No. 6.4

The Company • Oklahoma City, Oklahoma • Tel: (405) 672-6660 • Fax: (405) 672-6661 • wellmarkco.com©2015 The WellMark Company • Litho USA • WMEXP-SOLAR/AC-04/15 • All registered trademarks are the property of their respective owners. 15

EXP Solar and AC-Powered Chemical Injection Pump with DigiMax ADC Controller

“A” Head (Std.)Packing/Seals

“B” HeadPacking/Seals

1 • 1/4"2 • 3/8"3 • 1/2"4 • 1/4" Ceramic5 • 3/8" Ceramic6 • 1/2" Ceramic

0 • None (Std.)1 • 1/4"2 • 3/8"3 • 1/2"4 • 1/4" Ceramic5 • 3/8" Ceramic6 • 1/2" Ceramic

2 • Teflon®-Buna-N / Buna-N (Std.)3 • Teflon®-Viton® / Viton®4 • Teflon® / Buna-N5 • Teflon® / Viton®8 • Teflon® / Kalrez9 • Teflon®-Viton® / KalrezA • Teflon®-Viton® / Aflas®B • Teflon®-Viton® / EPRC • Teflon®-Buna-N / KalrezD • Teflon® / Aflas®E • Bronze Filled / KalrezF • Teflon®-Viton®/ Ceramic Hard SeatG • Teflon®-Buna-N /Ceramic Hard Seat

0 • No "B" Pump Head (Std.)2 • Teflon®-Buna-N / Buna-N3 • Teflon®-Viton® / Viton®4 • Teflon® / Buna-N5 • Teflon® / Viton®8 • Teflon® / Kalrez9 • Teflon®-Viton® / KalrezA • Teflon®-Viton® / Aflas®B • Teflon®-Viton® / EPRC • Teflon®-Buna-N / KalrezD • Teflon® / Aflas®E • Bronze Filled / KalrezF • Teflon®-Viton®/ Ceramic Hard SeatG • Teflon®-Buna-N /Ceramic Hard Seat

0 • No Mounting Required1 • Skid2 • Mast w/ Quad Legs (Std.)3 • Std. A Frame (VAC Only)8 • Std. A Frame (DC Only)9 • "Razorback" Skid* • Large Stand (Triple Panel)

0 • No Battery f / Single Box Solar Pump1 • No Battery f / Dual Box Solar Pump2 • 110 Amp Hour Battery (Std.)4 • 2, 110 Amp Hour Batteries5 • 3, 110 Amp Hour Batteries8 • 115 VAC

0 • None2 • 80 Watt4 • 2, 80 Watt Panels5 • 3, 80 Watt Panels

5 • VDC 1/6 HP, 64 RPM8 • VAC 1/3 HP, 60 RPM

*Standard height is 4'.**Standard length is 5'.

1**• Ext. Cable - Pump to Bat. Box2**• Ext. Cable - Panel to Bat. BoxG • Explosion Proof "Locking" Plug

(AC Only)P* • Ext. Post - Inches Over Std.S • Coated Plungers

3 • Digimax - DC5 • Digimax - AC

2nd Pump Head

Plunger Options

Controller

Options

Mount

Power

Panel

Motor Options

Determining the Model NumberExample given: Standard Model EXP-102052223-S Pump with 1/4” Plunger, No 2nd Head, Teflon®-Buna-N/Buna-N Packing and Seals, 1/6hp 12 VDC64 RPM Motor, 80 Watt Solar Panel, 110Amp Hour Battery, Mast with Quad Legs, DigiMax DC Timer Controller with Coated Plungers.

MODEL EXP - 1 0 2 0 5 2 2 2 3 - S

The Company • Oklahoma City, Oklahoma • Tel: (405) 672-6660 • Fax: (405) 672-6661 • wellmarkco.com16 ©2015 The WellMark Company • Litho USA • WMEXP-SOLAR/AC-04/15 • All registered trademarks are the property of their respective owners.

Series EXPSection No. 6.4

EXP Solar and AC-Powered Chemical Injection Pump for Class I, Division 2 Hazardous Locations with DigiMax ADC ControlSolar-Powered Pump Unit Component Parts

50

4

44

5857

53

55

46

33

45

44

56

52

35

2

25

36

24

23

22

21

20

28

24

23

25

27

1617

1839

19

5138 7

1032

11

112

41

6

34

8

40

29

512

33

43

42

1011

1314

15

69

70

71

72 73 7

3

37

9

3031

48 4947

26

74

AC-Powered Pump Unit Component Parts

4

51

2

35

44

25

36

24

23

22

21

20

28

24

23

25

27

1617

1839

19

333

1011

12

7

37

34

8

40

29

5 612

1110

1314

15

1

41

38

66

9

3031

48 4947

42

26

32

52

43

51

68

4557

56

58

55

54

46

50

55

5253

Series EXPSection No. 6.4

EXP Solar and AC-Powered Chemical Injection Pump for Class I, Division 2 Hazavrdous Locations with DigiMax ADC Control

The Company • Oklahoma City, Oklahoma • Tel: (405) 672-6660 • Fax: (405) 672-6661 • wellmarkco.com©2015 The WellMark Company • Litho USA • WMEXP-SOLAR/AC-04/15 • All registered trademarks are the property of their respective owners. 17

The Company • Oklahoma City, Oklahoma • Tel: (405) 672-6660 • Fax: (405) 672-6661 • wellmarkco.com18 ©2015 The WellMark Company • Litho USA • WMEXP-SOLAR/AC-04/15 • All registered trademarks are the property of their respective owners.

Series EXPSection No. 6.4

EXP Solar and AC-Powered Chemical Injection Pump for Class I, Division 2 Hazardous Locations with DigiMax ADC ControlSolar and AC-Powered Pump Unit Component PartsItem Description Qty. Part No.

Solar-Powered AC-Powered1 HOUSING 1 05013-9999 05013-99982 SPEED REDUCER 1 06000-9515 06000-95433 SOCKET HEAD SCREW 4 05000-5640 05000-63224 MOTOR 1 06000-9495 06000-95355 ELECTRIC WHEEL ASSEMBLY 1 05013-7059 06500-75426 SET SCREW 1 or 2 05000-62647 LOCK WASHER 4or 8 107098 BEARING 1 06000-95639 RECIPROCATING BLOCK 1 05013-781010 BUSHING 2 05013-701211 O-RING, BUNA 2 1101712 GUIDE NUT 2 05013-702013 GUIDE 1 05013-698614 JAM NUT 1 05013-696815 CAP 1 05013-7119

FLUID END, 1/4" 1 05013-690716 FLUID END, 3/8" 1 05013-6909

FLUID END, 1/2" 1 05013-690517 PACKING SET 1 SEE FACTORY

GLAND NUT, 1/4" 1 05013-700518 GLAND NUT, 3/8" 1 05013-7001

GLAND NUT, 1/2" 1 05013-7007PLUNGER, 17-4PH, 1/4" 1 05013-6975

19 PLUNGER, 17-4PH, 3/8" 1 05013-6977PLUNGER, 17-4PH, 1/2" 1 05013-6979

20 BALL, 1/4" 1 06000-026521 O-RING, TEFLON® 1 1046022 SEAT 1 05013-6950

23 O-RING, BUNA-N 2 05000-0066O-RING, VITON® 2 10608

24 BALL, 3/8", STAINLESS STEEL 2 06000-0267

25 O-RING, BUNA-N 2 05000-0058O-RING, VITON® 2 05000-0801

26 DISCHARGE VALVE BODY 1 05013-694227 SUCTION VALVE BODY 1 05013-693428 BLEED SCREW 1 05013-155829 PIN 2 05000-627230 HOUSING COVER 1 05013-999531 THUMB SCREW 2 05000-633032 PUMP BASE 1 05013-7223 05013-8270

33 COVER, SPEED REDUCER 2 05013-7715 —HEX HEAD SCREW, 5/16" 1 — 05000-5198

34 COVER GASKET 1 05013-999135 FLAT WASHER 4 06000-105436 SPRING 1 1060637 SOCKET HEAD SCREW 4 05000-6256 05000-1684

38 SPACER 4 05013-7828 —HEX HEAD SCREW, 1/4" 4 — 05000-1668

Item Description Qty. Part No.Solar-Powered AC-Powered

39 PACKING COVER 1 05013-752740 SOCKET HEAD SCREW 1 05000-6248 05000-6246

41 NYLOC NUT 4 05000-1635 —LOCK WASHER, 1/4" 4 — 11045

42 NAME PLATE 1 06000-928943 RIVET 4 001555P

44 FLAT WASHER, 1/4" 8 007124P —MOUNTING PLATE 1 — 05013-7785

45 SOCKET HEAD SCREW, 1/4" 4 05000-5648 —BRACKET, RIGHT 1 — 05013-8456

46 CONDUCT OUTLET 1 06000-9525 —BRACKET, LEFT 1 — 05013-8458

47 HEX HEAD SCREW, 5/16" 4 05000-174248 HEX NUT, 5/16" 4 05000-172649 LOCK WASHER, 5/16" 4 06000-5860

50 HEX HEAD SCREW, 1/4" 4 11044 —TIMER ASSEMBLY 1 — 06000-9725

51 HEX NUT, 1/4" 4 05000-1619 —HEX HEAD SCREW, 3/8" 8 — 05000-1841

52 WIRE, BLACK 10.5' 01007-0943B —LOCK WASHER, 3/8" 8 — 11018

53 WIRE, WHITE 10.5' 01007-0943W —HEX NUT, 3/8" 4 — 05000-2104

54 REDUCING BUSHING 1 06000-9527 06000-952955 CONDUCT FITTING 2 06000-8493 06000-849256 CONDUCT 1 05013-7577 05013-8536

57 FEMALE TERMINAL 2 06000-8548 —ELECTRIC CORD 13' — 06000-9819

58 PIN AND SOCKET PLUG 2 06000-8551 —CONNECTOR 1 — 06000-8610

59 GROUND SCREW (NOT SHOWN) 1 — 001504G60 GROUND CUP (NOT SHOWN) 1 — 001800P61 AC PUMP LABEL (NOT SHOWN) 1 — 06000-980562 AC PUMP IN/OUTDOOR STICKER (NOT SHOWN) 1 — 06000-980763 AC PUMP WARNING STICKER (NOT SHOWN) 1 — 06000-980964 REPAIR WARNING STICKER (NOT SHOWN) 1 — 06000-978465 WARNING STICKER, (NOT SHOWN) 1 — 06000-978266 HEX NUT, 1/4" 4 — 05000-161967 WIRE ASSEMBLY, (NOT SHOWN) 1 — 06500-807868 EXPLOSION PROOF PLUG 1 — 06000-697069 SOLAR PANEL ASSEMBLY 1 06500-7281 —70 POST 1 05013-7184 —71 BATTERY 1 06000-8429 —72 SKID 1 06500-7225 —73 BATTERY BOX 1 05013-9994 —74 CONTROL ASSEMBLY 1 06500-7292 —

Pump SpecificationsPlunger/Pin Position

Specification 1/4" Plunger 3/8" Plunger 1/2" Plunger1 2 3 1 2 3 1 2 3

PISTON AREA (SQ. IN.) 0.0491 0.1104 0.1963STROKE (IN.) 0.624 0.874 1.124 0.624 0.874 1.124 0.624 0.874 1.124

DISPLACEMENT PER STROKE (CU. IN) 0.0306 0.0429 0.0562 0.0689 0.0965 0.1241 0.1225 0.1716 0.2206DISPLACEMENT PER STROKE (OZ.) 0.0170 0.0238 0.0306 0.0382 0.0535 0.0688 0.0679 0.0951 0.1223DISPLACEMENT PER SECOND (OZ.) 0.0181 0.0254 0.0326 0.0407 0.0570 0.0733 0.0724 0.1014 0.1304

MAX. DISCHARGE PRESSURE -1/6HP MOTOR 5000 PSI 2500 PSI 1200 PSI