Jensen Mixers
Series 400 — Belt Driven Mixers
Heavy Duty · Belt Driven · Petroleum Service · Models 450 & 480 · Maximum 75 HP
Overview
Jensen Series 400 Mixers are heavy duty, belt driven units designed for long life and trouble-free operation in petroleum service. The Series 400 is supported entirely by the tank manway or nozzle — no tie rods, slings, bases, or external supports required. Light weight and low-overhang design reduce installation costs and simplify maintenance.
Model Specifications
| Parameter | Model 450 | Model 480 |
|---|---|---|
| H.P. (Max) | 20 | 75 |
| Shaft R.P.M. | 425 | 425 |
| Critical Speed | 1,960 RPM | 2,520 RPM |
Mechanical Seal — Type "F"
The Jensen Type "F" mechanical seal is an integral part of every Series 400 Mixer and is designed for long life at low cost. Materials of construction were especially 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.
Standard Materials
- Rotating Seal Face — Carbon
- Stationary Seal Face — Ni-Resist (High Nickel Cast Iron)
Optional Materials
- Manganese Bronze
- Tungsten
- Silicon Carbide
Jensen Sentry System
The Jensen Sentry System, available exclusively on the 450 and 480 models, consists of an externally-mounted lube pod that connects to the fluid-filled chamber surrounding the mixer's mechanical seal. In the event of a mechanical seal breach, the gravity-lubricated system detects and safely holds maximum tank head pressure — preventing tank contents from leaking onto the ground. Similar to API Plan 65B.
Standard Materials of Construction
Jensen standard materials offer optimum performance in hydrocarbon applications.
| Component | Material |
|---|---|
| Shaft & Wear Sleeve | 416 Stainless Steel |
| Lock Ring & Lock Bushing | 316 Stainless Steel |
| Propeller | Cast Steel |
| Drive Yoke | 356-T6 Aluminum |
| O-Rings | Viton |
Mixer Features
Mounting
Supported entirely by the tank manway or nozzle. No tie rods, slings, bases, or external supports required.
Shaft Support
Main thrust bearing at outboard end plus shaft end bearing near tank shutoff device. Long bearing span virtually eliminates shaft whip. All moving parts enclosed by protective covers.
Drive System
Rugged V-Belt drive train designed for long life and maximum reliability. Recent advances in V-belt technology reduce inspection frequency and adjustment requirements. Drive pulley is machined steel.
Tank Shutoff Device
Keyed to the shaft and seated against the propeller. Corrosion resistant materials, self-cleaning design, positive sealing after years of service.
Tungsten Carbide End Support
Solid tungsten carbide for greatest resistance to wear in abrasive environments.
Ferrule Seal
Superior flex fatigue resistance, longer running time, 14mm pitch. Perfect fit around VA ball and nozzle. Chemically inert material.
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.
Belt Specifications
| Model | Deflection | V-Belt Force | V-Belt Size | Cog Belt Force | Cog Belt Size |
|---|---|---|---|---|---|
| 420 | 3/16" | 3.3–4.8 lbs | 3V450 | N/A | N/A |
| 450 | 1/4" | 5.0–7.5 lbs | 3V710 | 8–10 lbs | 8MGT-1792-21 |
| 480 | 3/8" | 5.0–7.5 lbs | 5VX1000 | 18–20 lbs | 14MGT-2520-37 |
Mixer Selection Guide
Defining your requirement and selecting the right mixer is critical. Mixer applications fall into two categories:
Blending — Fixed Angle
A Jensen 400 Fixed Angle Mixer is ideal for blending miscible fluids, preventing stratification, eliminating surface solidification, and heat transfer for uniform temperature. Installed at slight angles relative to the tank centerline — typically 10° in large tanks, 7° in small tanks. Locate close to and clockwise from the fill line.
Desired flow pattern:
- Slight horizontal swirl
- Significant vertical turnover
Cleaning — Vari-Angle
For sediment removal, select the Jensen Model 400-VA Vari-Angle Mixer. In applications requiring both blending and cleaning, use the Vari-Angle model.
- Directs propeller flow anywhere in the tank
- Eliminates dead spots
- Improves sediment suspension
- Reduces manual tank cleaning
- Removes sediment from old tanks
Mechanical Actuator
The Jensen mechanical actuator automatically sweeps through a 60° entry angle, operating left-to-right and back, completing a full cycle in approximately 28 hours.
Propeller Roll-Through Clearances
Manway inside diameter (inches) required to insert propeller. H = manway depth (inches); columns = propeller diameter (inches).
Example: A 29" propeller will rotate through a 23" opening provided the opening depth is 8" or less.
| H (depth) | 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 |
Minimum Fluid Levels & Floor Clearance
Almost every vibration problem with Jensen Mixers results from too little clearance between the tank walls, tank floor, and mixer propeller. Low fluid levels may draw air into the propeller stream and cause vibration.
| Propeller Diameter | Fluid Above Centerline | Prop Tip to Floor |
|---|---|---|
| 35" (889 mm) | 10' (3.1 m) | 12" (305 mm) |
| 32" (813 mm) | 8' (2.4 m) | 12" (305 mm) |
| 29" (737 mm) | 7' (2.1 m) | 12" (305 mm) |
| 26" (660 mm) | 6' (1.9 m) | 10" (254 mm) |
| 23" (584 mm) | 6' (1.9 m) | 8" (203 mm) |
| 20" (508 mm) | 4' (1.3 m) | 8" (203 mm) |
Dimensional Data
Fixed Angle (FA) — All dimensions in inches
Model 450
| Dim. | Value |
|---|---|
| A | 11.00 |
| B | 22.25 |
| C | 21.50 |
| D | 1.88 |
| E | 15.25 |
| N | 1.625 |
| P | 36.375 |
| R | 8.00 |
| T | 10" 150# ANSI |
Model 480
| Dim. | Value |
|---|---|
| A | 14.50 |
| B | 28.25 |
| C | 23.50 |
| D | 2.12 |
| E | 23.80 |
| N | 2.625 |
| P | 41.375 |
| R | 7.38 |
| T | 12" 150# ANSI |
Variable Angle (VA) — All dimensions in inches
Model 450-VA
| Dim. | Value |
|---|---|
| A | 11.00 |
| B | 22.25 |
| C | 21.50 |
| D | 1.88 |
| J | 4.37 |
| M | 15.25 |
| N | 1.625 |
| R | 8.000 |
| S | 29.75 |
| U | 2.25 |
Model 480-VA
| Dim. | Value |
|---|---|
| A | 14.50 |
| B | 28.25 |
| C | 23.50 |
| D | 2.12 |
| J | 23.80 |
| M | 23.80 |
| N | 2.625 |
| R | 7.375 |
| S | 34.12 |
| U | 2.25 |
Installation, Operation & Maintenance
Limited Warranty
Jensen Mixers are warranted against defects in materials or workmanship for a period of 12 months following the date of purchase. Warranty is limited to replacement or repair of the agitator by Jensen only.
Covered
Defects in materials or workmanship — replacement or repair by Jensen.
Not Covered
- · Consequential damages
- · Removal
- · Freight
- · Re-installation
Electric motors are warranted separately by their respective manufacturers.
Ready to specify a Series 400 Mixer?
Call ext. 24 for the Jensen Group · [email protected]
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