1

1 2 3 4 5 6

10
7
11

12

8
13

14
9
15 16 17 18 19 20
Item # Part # # Reqd. Description Material Alternate Part #
1 A-1854 1 0-12 PSI Pressure Gauge ♦ A-1295SS
2 A-0022 1 Inlet Gas Valve Assembly Brass A-0022SS
3 A-2599 1 Air Filter Plastic ♦
4 A-0132 2 Elbow Brass A-0132SS
5 A-0558 1 Grease Jack Steel ♦
6 A-4452 1 Bolt 316 Stainless Steel ♦
7 A-0123 1 Priming Valve 304 Stainless Steel ♦
8 See Pages 8 & 9 1 Head Assembly See Pages 8 & 9 ♦
9 A-0075 1 Street Elbow Steel ♦
10 A-4692 1 Nipple Steel ♦
11 A-1718 1 Regulator Plastic ♦
12 A-0132 1 Half Union Brass A-0132SS
13 B-0037 1 Master Valve Aluminum B-0037SS
14 A-0137 1 Half Union Brass A-0137SS
15 A-0009 1 Attachment Nipple Brass A-0009SS
16 A-0141 1 Cap Screw Steel ♦
17 A-1494 1 Master Valve Line Copper A-1494SS
18 A-1493 1 Pilot Valve Line Copper A-1493SS
19 C-0009 1 Pilot Valve Assembly Steel Seat ♦
20 A-0058 1 Pilot Valve Gasket Fiber ♦
* Recommended Spare Parts **Furnished on all plungers except 1¼” ***Alternate Parts for Sour Gas Trim are all Stainless Steel
2
 1 2 3 4 5 6 7 8 9 10 11

12

13

15

14

16

17

18 19 20 21 22 23 24 25 26 27

Item # Part # # Reqd. Description Material Alternate Part #

1 B-0002 1 Disc Aluminum ♦
2 A-0131 1 ¼" Safety Valve Set #50 Brass A-0131SS
3 D-0434 1 Housing Aluminum ♦
4 A-2599 1 Air Filter Plastic ♦
5 A-0025 1 Spring Steel ♦
6 A-0146 1 Set Screw Steel ♦
7 A-0020 1 Pin Steel ♦
8 A-0035 1 Stroke Adjustment Pin Brass ♦
9 A-2970 1 Wing Screw Steel ♦
10 B-0004 1 Cover Aluminum ♦
11 B-0036 1 ⅛" Gasket Buna-N ♦
12 A-0041 1 Nut Brass ♦
13 A-0123 1 Priming Valve 303 Stainless Steel ♦
14 D-0001 1 Housing Aluminum ♦
15 C-0001 1 Cover Aluminum ♦
16 A-0138 1 Drain Plug Steel ♦
17 A-0142 1 Diaphragm Housing Bolts Steel ♦
18 B-0010 2 Diaphragm Buna-N ♦
19 A-0076 1 Bushing Steel ♦
20 A-0144 1 Nut Steel ♦
21 A-0139 1 Bolt Steel ♦
22 C-0004 1 Base Aluminum ♦
23 B-0011 1 Gasket Fiber ♦
24 B-0003 1 Thrust Rod Brass ♦
25 A-0141 1 Screw Steel ♦
26 A-0038 1 Stuffing Box Brass ♦
27 A-0059 1 Packing Buna-N ♦
* Recommended Spare Parts **Alternate Parts for Sour Gas Trim are all Stainless Steel
3
 1. The discharge bushing is a ¼” NPT connection (Item #9, Page 8), this is where you will connect your fluid
discharge line, you should always install a line check at the point of injection for additional safety. Our A-0675
stainless steel line check is a ¼” NPT male x female good for discharge pressure of 6,000 PSIG, our ½” NPT
female x female line check is 10,000 PSIG rated.
NOTE: Install line check valves with the flow arrow pointing in the direction of the flow.
2. The suction bushing is a ¼” NPT connection (Item #17, Page 8), care should be taken to make sure no dirt,
sand or other foreign objects are left in the suction line before hooking it up, as any of these items will not al-
low the check valves in the head assembly to operate properly.
3. Before connecting the gas line to power the pump, make sure there is no more than 50 PSIG availiable, if the
line pressure is higher than 50 PSIG, you must reduce to this pressure. Make sure this line is free of debris and
connect to the A-0022 inlet gas assembly (Item #2, Page 2), this is also a ¼” NPT connection. The regulator
with a gauge (Item #11, Page 2) is preset to 12 PSIG, and should always be set at this point. This regulator and
gauge are used to regulate a very, very small amount of gas going through pilot valve ( Item #19, Page 2) and
the master valve (Item #13, Page 2) and has nothing to do with regulating the incoming gas pressure to the
pump.
4. Remove thumb screw (Item #9, Page 3) and cover (Item #10, Page 3) and pour 3 quarts of light weight motor
oil (10 weight), Marvel Mystery, or transmission fluid, into the chamber next to the large diaphragm, this is
true on all size plungers except the 1¼”, with it, plug the ¼” NPT drain and fill the chamber that the plunger
operates in with oil, this will lubricate the plunger and lengthen the life of the packing.
5. After all connections are made, open the fluid valve on your storage tank and open priming valve (Item #7,
Page 2), at the same time, slowly open the speed control valve (Item #2, Page 2) to start pump. After the stream
of fluid from the priming valve is free of air bubbles, close this valve.
6. When you first start the pump you may see some fluid leakage around the plunger packing nut (Item #2, Page
8), this is OK for the first 2 or 3 minutes, this allows the packing to get wet and take a set, then stop the pump
and very slightly tighten the packing nut (Item #2, Page 8), then restart the pump.
NOTE: DO NOT ATTEMPT PACKING ADJUSTMENT WITH PUMP RUNNING!
7. Volumes of fluid pumped, are a function of plunger stroke length and speed (SPM). You have available two
(2) stroke lengths and a variety of speeds up to 60 SPM continuous or 75 SPM intermittently. To change stroke
length, move the plunger pin (Item #8, Page 3) from one hole to the other. The hole nearer the injection head
will give you the longest stroke.
28¼”

18½”

13 13/16”
11½”

10”

4
1 2 3 4 5 6 7

8 9 10 11 12 13 14 15

NOTE: Using small amount of grease, lubricate Items #11 and

#12, o'rings, before and after installation on Item #5. This will
keep o'rings in place and facilitate the pressing (thumbs only)
of the valve seat into position.

Item # Part # # Reqd. Description Material

1 C-0495 1 Disc Retainer Steel
2 C-4668 1 Valve Disc and Pin Stainless Steel
3 C-0441 1 Pilot Valve Body Ductile Iron
*4 C-0463 2 Seat Seal Screw Steel
5 C-0451 1 Valve Seat Steel
6 A-0065 1 Flipper Arm Assembly Iron
7 A-4600 1 Flipper Spring Assembly Steel
8 A-0077 1 Spring Steel
9 A-0579 1 Washer Stainless Steel
10 C-3386 1 Flush Seal Plugs Steel
11 C-0485 1 Seat Seal O'Ring Buna-N
*12 C-0474 2 Seat Seal Screw O'Ring Buna-N
13 A-0170 1 Clevis Pin Steel
14 A-0772 1 Spring Bushing Brass
15 A-0168 1 Cotter Pin Steel
* Recommended Spare Parts **Items make up a C-0600 Pilot Valve Seat and Disc Assembly

5
 4

1 5

1 2 3 4 5 6

Parts List
Item # Part # # Reqd. Description Material
A-0678 1 Inlet Body Brass
1 2
A-1297 1 Inlet Body 303 Stainless Steel 6
2 A-1574 1 Washer 304 Stainless Steel
A-0479 1 O'Ring Buna-N
3
A-2580 1 O'Ring Viton
4 A-0054 1 ⅜" Ball 316 Stainless Steel
5 A-0391 1 Spring Steel
A-0679 1 Outlet Body Brass
6
A-1296 1 Outlet Body 303 Stainless Steel
* Recommended Spare Parts **A-0675 Only ***A-0676 Only

3
15,000 lbs. Working Pressure
1 2 3 4 5 6
Note: Not used
on the 1¼" head.

Parts List
Item # Part # # Reqd. Description Material
Parts List 1 A-0561 1 Base Steel
Item # Part # # Reqd. Description Material
1 B-0271 1 Body 303 Stainless Steel
A-3179-1 1 Lube Stick ♦
2 A-0391 1 Spring Steel 2 Carton of 72
A-3179-2 1 ♦
3 A-1879 1 Valve 303 Stainless Steel Lube Sticks
A-0612 1 O'Ring Buna-N 3 A-0560 1 Screw Steel
4
A-2184 1 O'Ring Viton 4 A-0562 1 Retainer Steel
A-1959 1 O'Ring Buna-N
5
A-3979 1 O'Ring Viton
5 A-0564 1 Ball 316 Stainless Steel
6 A-1880 1 Bushing 303 Stainless Steel 6 A-0559 1 Body Steel
* Recommended Spare Parts * Recommended Spare Parts

6
 1 2 3 4 5 6 7 8 9 10

Parts List
Item # Part # # Reqd. Description Material Item# Part # # Reqd. Description Material
1 A-0164 1 Cap Nut Steel 7 A-0201 1 Lower Valve Seat Buna-N
2 A-0001 1 Housing Cap Aluminum A-0196 1 Valve Disc Brass
8
3 A-1329 1 Diaphragm Buna-N A-0196SS 1 Valve Disc Stainless Steel
A-0197 1 Stem Assembly Brass 9 A-0202 1 Valve Spring Steel
4
A-0197-SS 1 Stem Assembly Stainless Steel A-0200 1 Upper Valve Seat ♦
10
5 A-0163 1 Cap Bolt Steel A-0200-SS 1 Upper Valve Seat Stainless Steel
6 C-0003 1 Housing Aluminum * Recommended Spare Parts
**Alternate Parts for Sour Gas Trim are all Stainless Steel

1 2 3 4 5

Parts List
Item # Part # # Reqd. Description Material
1 A-0010 1 Body Brass
2 A-0023 1 Packing Graphite
3 A-0011 1 Gland Nut Brass
4 A-0195 1 Nut Brass
5 A-0013 1 Valve Stem Brass
* Recommended Spare Parts

7
 (For ¼”, ⅜”, ½”, ¾”, and 1” Heads)
1 2 3 4 5 6 7 8 9 Alternate Construction
10 Item # Part # Description Material
11 A-2336 O'Ring Viton
11 303
Metal-to-Metal Top Seat
13 A-0157 Stainless
for ¼" & ⅜" Heads
Steel
17 A-2184 O'Ring Viton
12
Metal-to-Metal Bottom
A-0157 303
Seat for ¼" & ⅜" Heads
19 Stainless
Metal-to-Metal Bottom
A-0051 Steel
Seat for ½", ¾" & 1" Heads
13

14 Alternate Packing
20 11 19
15 Part #
Item # Description
Viton Teflon Hard*
16
15 16 18 A-4102 A-1642 A-2295 ¼" Plunger Packing
A-4101 A-1234 A-1875 ⅜" Plunger Packing
17 6 A-4103 A-1012 A-1874 ½" Plunger Packing
A-4657 A-2988 A-2772 ¾" Plunger Packing
A-4658 A-1013 A-4135 1" Plunger Packing
*Hard packing for 3000PSI and above service
Part #
Item # # Reqd. Description Material
¼" ⅜" ½" ¾" 1"
Ductile Iron with
♦ C-1609 C-0085 C-0068 C-0335 C-0019 1 Head Assembly
Stainless Steel Trim
Armaloy - 17.4 pH
1 A-2764 A-0743 A-0032 A-2767 A-0158 1 Plunger
Stainless Steel
2 A-2765 A-0944 A-0055 A-2768 A-0047 1 Packing Gland Nut Carbon Steel
3 A-1463 A-0957 A-1219 A-2769 A-0043 1 Packing Gland 303 Stainless Steel
4 A-2766 A-0742 A-0447 A-2270 A-0448 1 Lantern Ring 303 Stainless Steel
5 A-0516 1 Pipe Plug ♦
*6 A-1461 A-1456 A-0959 A-2771 A-0050 1 Plunger Packing Buna-N
7 C-1608 C-0084 C-0022 C-0333 C-0020 1 Body Ductile Iron
8 A-0054 1 ⅜" Top Check Ball 316 Stainless Steel
9 A-0152 1 Top Bushing 303 Stainless Steel
10 A-0077 1 Ball Check Spring 316 Stainless Steel
*11 A-2097 1 O'Ring Buna-N
12 A-2350 3 Gasket 304 Stainless Steel
13 A-0444 1 Ball Cage 17.4 pH Stainless Steel
14 A-0054 A-0053 1 Bottom Check Ball 316 Stainless Steel
15 A-2350 A-2338 1 Gasket 304 Stainless Steel
*16 A-2097 A-0612 1 O'Ring Buna-N
17 A-0153 1 Bottom Bushing 303 Stainless Steel
*18 B-0368 B-0698 1 Bottom Seat Assembly 303 Stainless Steel
*19 B-0368 1 Top Seat Assembly 303 Stainless Steel
20 A-3523 1 O'Ring Retainer Stainless Steel
* Recommended Spare Parts *Alternate Components Availiable (see tables above)

8
 (For 1¼” Heads)
1 2 3 4 5 6 7 8

9
Alternate Construction
Item # Part # Description Material 10
A-4480 Viton
Plunger
3 A-1014 Teflon
Packing 11
A-4133 Hard*
10 A-2336 O'Ring Viton
15 A-2184 O'Ring Viton
Metal-to-Metal 303 Stainless 12
17 A-0051
Bottom Seat Steel
13
Metal-to-Metal 303 Stainless
18 A-0157
Top Seat Steel 14
19 10 18
*Hard packing for 3000PSI and above service
15
14 15 17

16

Item # Part # # Reqd. Description Material

♦ C-0048 1 Head Assembly Ductile Iron with Stainless Steel Trim
1 A-0408 1 Plunger Armaloy - 17.4 pH Stainless Steel
2 A-0404 1 Packing Gland 303 Stainless Steel
*3 A-0405 1 Plunger Packing Buna-N
4 A-0923 1 Adapter 303 Stainless Steel
5 A-0521 1 Gasket Copper
6 C-0049 1 Pump Head Ductile Iron
7 A-0054 1 ⅜"Top Check Ball 316 Stainless Steel
8 A-0152 1 Top Bushing 303 Stainless Steel
9 A-0077 1 Ball Check Spring 316 Stainless Steel
*10 A-2097 1 O'Ring Buna-N
11 A-2350 3 Gasket 304 Stainless Steel
12 A-0053 1 ½" Bottom Check Ball 316 Stainless Steel
13 A-0444 1 Ball Cage 17.4 pH Stainless Steel
14 A-2338 1 Gasket 304 Stainless Steel
*15 A-0612 1 O'Ring Buna-N
16 A-0153 1 Bottom Bushing 303 Stainless Steel
*17 B-0698 1 Bottom Seat Assembly 303 Stainless Steel
*18 B-0368 1 Top Seat Assembly 303 Stainless Steel
19 A-3523 1 O'Ring Retainer Stainless Steel
* Recommended Spare Parts *Alternate Components Availiable (see table above)

9
 ♦ Introducing detergents in air-gas drilling operations

♦ Blending foaming agents in water laden gas wells

♦ High pressure addition of fluid compounds in blending and chemical processing

♦ Pilot laboratory procedure involving high pressure circulation of mercury and other test substances

♦ Introduction of de-salting agents, de-emulsifiers, inhibitors and flocculants in crude oil and gas streams

♦ High and low pressure lubrication systems

♦ Methanol and alcohol injection in gas systems to prevent freezing

♦ General high pressure injection applications

♦ Fluid blending of extreme pressures within varied, controlled processes

♦ Hydrostatic testing

♦ Glycol circulation

♦ Pumping liquefied gasses

♦ Water treatment

♦ High pressure sampling

Operating Maximum Discharge Pressure Maximum Volume

Plunger
Model # Ratio (PSIG) Intermittent Continuous
Size
(gas*/fluid) Hard Packing Soft Packing GPH GPD GPH GPD
50-22 ¼” 1000/1 20,000 3,000 0.83 20 0.67 16
50-23 ⅜” 497/1 20,000 3,000 2.33 56 1.79 43
50-24 ½” 264/1 12,000 3,000 4.38 105 3.54 85
50-25 ¾” 115/1 5,000 3,000 7.42 190 6.67 160
50-26 1” 66/1 ♦ 3,000 16.66 400 13.33 320
50-27 1¼” 42/1 ♦ 2,000 26.04 625 20.83 500
*Maximum Power Gas Pressure: 50 PSI
Stroke Length - Long: 1¼”; Short: ½”

10
NOTE: Make sure valves on suction and discharge lines are open.

Pump will not run.

1. If the pump will not run, make sure you have gas and pressure (50 PSIG Max) to the A-0022 speed control
valve (Item #2, Page 2). Check pressure on line that pump is injecting into, too high pressure will result in a
stalled pump.
2. Check the position of the pilot valve disc (Item #2, Page 5) by removing the fitting and disc retainer, C-0495
(Item #1, Page 5), to expose the C-4668 (Item #2, Page 5).
3. With a long screwdriver, move the flipper arm forward, towards the injection head, then check the hole
in the C-4668 to make sure it aligns with the hole in the C-0451 (Item #5, Page 5) body, this hole is a 9
o’clock, there is another hole at 3 o’clock, but is not to be considered when timing this pump.
4. The pump is now in time, replace all items, and start pump.
NOTE: A hole in the diaphragm (Item #18, Page 3) is evident by gas discharging constantly into the oil
chamber.

Pump makes only one stroke forward and does not make return stroke.
1. Check ¼” NPT pilot hole located on right side of pilot valve assembly (Item #19, Page 2), this hole should
be clear, because it is the discharge port for the pilot gas system (very small amount) which is necessary for
the pump to make the return stroke.
2. Pull the lift ring on the A-0131 safety valve (Item #2, Page 3), if there is a constant discharge of gas then
check the A-1329 diaphragm (Item #3, Page 7) of the B-0037 master valve (Item #13, Page 2) for a hole,
while you are there make sure the A-0197 stem assembly (Item #4, Page 7) will move up (against spring
tension) and return, if not disassemble the B-0037 completely, wash all parts to remove sand, slag, rust or
other material that might be obstructing proper operation of this valve. At the same time check items A-0200
upper valve (Item #10, Page 7) seat, A-0196 valve disc seat (Item #8, Page 7), A-0201 lower valve seat
(Item #7, Page 7) (rubber) for excessive wear and A-0202 spring (Item #9, Page 7) for breakage.
3. Make sure both ⅜” NPT ports are open and unobstructed by sand, rust, oil or other debris that might impede
gas flow.

Pump runs but will not pump.

1. Make sure the fluid to be pumped is getting to the suction bushing (Item #17, Page 8) in quantity. Open the
priming valve to bleed air from head assembly. If you have a liquid level gauge (and you should) shut valve
on gauge as if you were making a volume test, if fluid falls in the tube on the suction stroke, then rises on
the discharge stroke, the suction valve (Item #18, Page 8) is leaking or by-passing fluid.
2. Disconnect suction line, remove suction bushing, replace o'ring (Item #16, Page 8) in bottom check valve
seat (Item #18, Page 8). Viton o'rings should be used in chemical service, both in bottom and top check
valve seats.
3. Restart pump, set speed for volume needed.
11