Jensen Mixers
Gear Driven · Petroleum Service · Maximum 75 HP · Fixed-Angle & Vari-Angle · ATEX Certified

The Jensen Series 600 Mixer is the only side-entering mixer designed exclusively for use in petroleum service. Every design feature is tailored to meet the rugged requirements of refinery and pipeline applications.
In every configuration range it offers superior life and load figures, unmatched ease of maintenance, and outstanding mixing efficiency. The Series 600 is supported entirely by the tank man-way or nozzle — no tie rods, braces, or other external supports are required.
| Parameter | 620 | 650 | 680 |
|---|---|---|---|
| H.P. (Max) | 20 | 40 | 75 |
| Shaft R.P.M. | 425 | 425 | 425 |
| Gear Rating | 37.5 HP | 116 HP | 116 HP |
| Critical Speed | 2,470 RPM | 2,870 RPM | 3,200 RPM |
Jensen standard materials offer optimum performance in any hydrocarbon application.
| Component | Material |
|---|---|
| Shaft | Stainless Steel |
| Locking Ring, Lock Bushing & Seal Housing | 316 Stainless Steel |
| Drive Yoke | Aluminum Bronze |
| Propeller & Body | Cast Carbon Steel |
| Gearbox | 356-T6 Heat Treated Aluminum Alloy |
| O-Rings | Viton "A" |
The Tungsten Carbide coated wear sleeve provides maximum protection to the mixer shaft. The Tungsten Carbide contact surfaces of the end bearing and wear sleeve assure long life and superior wear characteristics.
The tank shutoff is keyed to the shaft and seated against the propeller. Corrosion resistant material and self-closing design assure positive sealing even after years of service.
The Jensen Type "F" mechanical seal is an integral part of every Series 600 Mixer. It is designed for long life at low cost. Materials of construction are selected to suit petroleum applications. Both sealing members are extra heavy to prevent face distortion. If seal replacement is necessary, wearing parts may be purchased separately, cutting replacement cost in half.
| Component | Material |
|---|---|
| Rotating Seal Face | Carbon |
| Stationary Seal Face | Ni-Resist 2 (High Nickel Cast Iron) |
| Sleeve | 316 Stainless Steel |
| O-Rings | Viton "A" |
| Springs | Inconel |
When the mechanical seal is replaced, the shaft is sealed at two points. In addition to the front locking seal, an O-Ring Seal (A) is brought in from the seal as engaged. This secondary shaft seal minimizes product loss during seal change and acts as a back-up for the main locking seal. A sight glass (B) is provided for seal leak detection.
"It takes longer to read this brochure than it does to change our seals."
Phoenix Propeller
Standard — All Series"Phoenix Propeller is the balance of
form, function and performance."
15 Years in the Making
After 15 years of research and consultation with propulsion designers who advise today's military, Jensen combined cutting-edge manufacturing techniques with deep petrochemical application experience to create the perfect balance of performance and efficiency for modern blending applications and sediment control standards.
"There's a way to do it better — find it."
— Thomas Edison
Engineering Highlights
Pitch-Adjusted Design
Each propeller is built to match the customer's performance needs with calculated pitch-to-diameter ratios.
Maximized Power Utilization
Proprietary pitch-adjusted designs maximize both performance and utilization of available power.
Investment Cast
Precision investment casting ensures consistent geometry and surface finish on every unit.
Dynamically Balanced
Balanced to ISO 1940-G6.3 — the same standard used in precision industrial rotating equipment.
CFD Designed
Computational fluid dynamics modeling optimizes blade geometry for real-world petrochemical tank conditions.
Real-World Tested
Validated through years of field testing in active petrochemical and blending applications.
Shaft Lock Washer
Propeller Roll-Through Clearances (inches)
Jensen Pitch-Adjusted propellers can be installed through most standard man ways without removing the mixer shaft or entering the tank.
| Manway Depth (H) | 20" | 23" | 26" | 29" | 32" | 35" |
|---|---|---|---|---|---|---|
| 4 | 14 | 16 | 17 | 19 | 20 | 22 |
| 5 | 15 | 16 | 18 | 19 | 21 | 22 |
| 6 | 16 | 17 | 19 | 20 | 22 | 24 |
| 7 | 16 | 17 | 19 | 22 | 24 | 25 |
| 8 | 18 | 19 | 20 | 23 | 25 | 26 |
| 9 | 18 | 19 | 20 | 24 | 26 | 28 |
| 10 | 18 | 20 | 22 | 24 | 27 | 29 |
| 11 | 18 | 21 | 22 | 25 | 27 | 30 |
| 12 | 19 | 21 | 22 | 25 | 28 | 30 |
| 13 | 19 | 21 | 22 | 26 | 29 | 32 |
| 14 | 21 | 22 | 24 | 27 | 30 | 34 |
| 15 | 21 | 22 | 25 | 28 | 30 | 34 |
FA — Fixed Angle
For companies blending two or more fluids. Select the Jensen Model 600 Fixed-Angle Mixer for blending, heat transfer, and homogenization applications.
VA — Vari-Angle
For companies needing to remove sediment accumulations from tank bottoms. In cases where both blending and bottom suspension are required, the Vari-Angle should be selected.
The design simplicity of the Jensen non-lubricated coupling guarantees maximum life even under the most severe conditions. The tough, multi-ply flexible nylon and rubber element permits angular and parallel misalignment in excess of other couplings. Removal of the driver gearbox or flexible element can be accomplished without moving hubs on their shaft.
The flexible "Tors" element is a patented product of The Falk Corporation.
The Jensen Vari-Angle mixer features a precision, ball-type stuffing box allowing up to 60 degrees of angular movement. Sealing of the VA ball is accomplished by Jensen's innovative ferrule seal backed by Teflon impregnated non-asbestos packing which is fully adjustable, eliminating leaks. Mixer weight is supported entirely by two heavy-duty, pin-type hinges.
Ferrule Seal
Flex Boot
Protects against sand, dust, weather, and the occasional paint gun.
Angle changes can be made easily by one person or automatically controlled by the optional Mechanical Actuator. As with all Jensen Mixers — no turn-buckles, no tie rods, no bases, no other extra supports required.
620-VA
| Dim. | Value |
|---|---|
| C | 11.500 |
| D | 6.750 |
| L | 1.125 |
| M | 54.375 |
| N | 1.625 |
650-VA
| Dim. | Value |
|---|---|
| C | 14.500 |
| D | 9.500 |
| L | 1.125 |
| M | 62.375 |
| N | 2.125 |
680-VA
| Dim. | Value |
|---|---|
| C | 14.625 |
| D | 9.500 |
| L | 1.125 |
| M | 64.375 |
| N | 2.625 |
620
| Dim. | Value |
|---|---|
| C | 11.500 |
| D | 6.750 |
| E | 1.125 |
| G | 15.000 |
| H | 1.25 |
| J | 18.000 |
| K | 8.125 |
| M | 54.375 |
| N | 1.625 |
| P | 36.375 |
| T | 8" 150# ANSI |
650
| Dim. | Value |
|---|---|
| C | 14.500 |
| D | 9.500 |
| E | 1.125 |
| G | 19.000 |
| H | .375 |
| J | 22.000 |
| K | 10.500 |
| M | 62.375 |
| N | 2.125 |
| P | 40.375 |
| T | 10" 150# ANSI |
680
| Dim. | Value |
|---|---|
| C | 14.625 |
| D | 9.500 |
| E | 1.125 |
| G | 19.000 |
| H | .375 |
| J | 22.000 |
| K | 10.750 |
| M | 64.375 |
| N | 2.625 |
| P | 40.375 |
| T | 12" 150# ANSI |
Jensen Mixers are warranted against defects in material or workmanship for a period of 12 months following date of purchase. This warranty is limited to replacement or repair of the agitator by Jensen Mixers International only and does not cover consequential damage, removal, freight, or re-installation. Electric motors are warranted by their respective manufacturers and are excluded from Jensen warranty.
Installation, Operation & Maintenance
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