
AF1020 Series Chop Check Piston Pumps & Packages
20:1 Ratio
10" Air Motor
10.5 GPM (39.7 LPM) Max Flow
Max Fluid: 2,250 psi
10" AFX
Series
Available Models
Pump Model** | Lower Pump Model Material | Plunger Material | Upper Packings | Lower Packings | Lower Pump Model | Pump Service Kit |
---|---|---|---|---|---|---|
AF1020S11FF44 | Carbon Steel Nickel Plated | Carbon Steel, w/Hard Chrome | UHMW-PE | UHMW-PE | 66236-C4E-B | 637128-C44-B |
AF1020S11HF44 | Carbon Steel Nickel Plated | Carbon Steel, w/Hard Chrome | UHMW-PE/Leather (Staggered) | UHMW-PE | 66236-F4E-B | 637128-F44-B |
AF1020S11PF14 | Carbon Steel Nickel Plated | Carbon Steel, w/Hard Chrome | Polyurethane | UHMW-PE | 66236-J3E-B | 637128-J34-B |
**Add “-1” to Model No. for Ball Valve Regulator
Chop-Check pumps are designed to move medium-to-high viscosity fluids in difficult applications.
The heavy-hitters of the line, ARO® chop-check pumps are designed to move medium-to high- viscosity fluids ranging from 15,000 cPs to more than 1,000,000 cPs, and at delivery rates up to 12.2 gpm (46.3 L/min).
Applications advantages of Chop-Check:
Extrusion: Chop-Check pumps are workhorses - able to deliver viscous adhesives, sealants, caulking and heavy lubricants to the application point at the desired pressure and flow rate.
Transfer & Supply: Depending on the model, some Chop-Check pumps are capable of achieving flow rates up to 12.2 gpm, ensuring efficient transfer of heavy greases, inks and other viscous materials.
Materials advantages of Chop-Checks:
Chop-Check pumps have a primer piston to ‘feed’ material into the pump. They are often used in conjunction with a follower plate to force material down. This prevents loss of prime due to Channeling - a condition where the pump inlet becomes surrounded by air due to the cavity formed when a high viscosity material does not level off when removed (Slumpability).
- Stringy materials: Chop-Checks have mechanical, flat checks to overcome materials that resist cut-off and adhere to themselves.
- Tacky materials: Chop-Check pump options come in high ratios to generate the fluid pressure needed to move materials that will adhere to hoses and equipment while wet.

Specifications
Ratio | 20:1 |
---|---|
Stroke | 6” (15.24 cm) |
Material Inlet | Flange Mount |
Material Outlet | 1-1/2” NPT(F) |
Air Inlet (female) | 3/4” NPT(F) |
Air Inlet Pressure Range psi (bar) | 30 - 90 (2.1 - 6.2) |
Fluid Pressure Range psi (bar) | 600 - 2250 (41.4 - 155.2) |
Max Cycles/Minute | 70.0 |
Displacement/Cycle cu in (cm3) | 40.4 (662.0) |
Cycles/gal (L) | 5.7 (1.5) |
Flow @ 60 Cycles gpm (L/min) | 10.5 (39.7) (@70 Cycles) |
Noise Level @ 60 psi dBA | 89.8 |
Weight* lb (kg) | 144 (65.3) |
Container Suitability | Remote Mounting |


Dimensions
A* in (mm) | 54.40 (1381.71) |
---|---|
B in (mm) | 31.34 (796.11) |
C in (mm) | 19.94 (506.40) |
*For models without ball valve regulator subtract 2.08 in (52.83 mm)
Document Library
AF1020S Manuals
Pump Packages
SP1020S Manuals
TP1020S Manuals
Drawings
TPX Series Two Post Ram - 55 Gallon
Model No. | Package Type | Pump Model | Ram/Lift Model | Follower | Follower Seal Description | Material |
---|---|---|---|---|---|---|
TP1020S51FF44AA2 | 55 Gallon Two Post Ram | AF1020S11FF44 | RM552S-C | 66517-1 | Double Lip, Polyruethane | Aluminum |

Recommended Accessories
Extrusion Guns
651500 For material over 200,000 cP
3/8” (F) inlet
651533 For low- to medium-viscosity
fluids 1/4” NPS (M) inlet
Extrusion Gun Nozzle Kits
66541-6 Orifice .063” (1.63
mm), 66541-9 Orifice .093” (2.36 mm),
66541-2 Orifice
.125” (3.17 mm)
Swivel
636085 Straight, 3/8” (M) x 3/8” (F) / fabric
with neoprene / 8,000 psi (552 bar) max. working pressure
636088 Z-360°, 3/8” (M) x 3/8” (F) / fabric with neoprene /
8,000 psi (552 bar) max. working pressure
75364
Straight, for use with 651533 gun / 1/4”-18 NPTF to 1/4”-18 NPSM /
10,000 psi (690 bar) max working pressure
Material Filters
1” F (2) inlet 3/8” F (3) outlet /
6,000 psi (414 bar) max. / Carbon Steel
651418-40-B for
40 Mesh (375 Microns)
651418-70-B for 70 Mesh (200
Microns)
3/4” Fluid Pressure Regulators
651780-C1B-B Regulated
750 – 2,500 psi (52 – 173 bar) /
6,000 psi (414 bar) max.
inlet / carbon steel
651780-C1C-B Regulated 2,000 –
5,000 psi (138 – 345 bar) /
6,000 psi (414 bar) max. inlet /
carbon steel
651780-C3B-B Regulated 750 – 2,500 psi (52
– 173 bar) /
6,000 psi (414 bar) max. inlet / stainless
steel