Eductors – Jet Pumps
Model MP PVC Water Jet Eductors
Liquid Pumping & Mixing — Sizes ½″ through 3″
The Model MP is a PVC water jet eductor — a type of ejector which utilizes the kinetic energy of a pressurized liquid to entrain another liquid, mix the two, and discharge the mixture against a counter pressure. Self-priming with no moving parts, the Model MP is resistant to a wide range of corrosive media.
Available in six sizes from ½″ through 3″, the Model MP is used throughout industry for pumping and mixing operations involving corrosive or chemically aggressive media. As an example of performance in a typical application, a 1″ Model MP measuring 8½″ in length will empty a 500-gallon water tank in less than half an hour, using water at 60 psig as the sole source of motive power.
PVC Material Note
PVC eductors offer resistance to many corrosive media but are not recommended for acetone, ketones, ether, esters, aromatic hydrocarbons, or chlorinated hydrocarbons. Maximum temperature rating is 150°F.
Model MP Design Ratings
| Model | MP (PVC) |
| Available Sizes | ½″, 1″, 1½″, 2″, 2½″, 3″ |
| Maximum Temperature | 150°F |
| Connections | Threaded or flanged |
| Moving Parts | None |
| Operation | Continuous or intermittent |
Chemical Compatibility
Suitable For
Dilute acids, bases, water-based solutions, many aqueous chemicals
Not Recommended
Acetone, ketones, ether, esters, aromatic or chlorinated hydrocarbons
Need a higher temperature rating or broader chemical compatibility? Consider PVDF (KYNAR®) eductors rated to 250°F, or stainless steel liquid jet pumps for demanding services.
Applications
Water jet eductors have numerous uses throughout the plant — lifting, pumping, mixing, and agitation of liquids, granular solids, and slurries. Specific applications include:
- Draining flooded areas and emptying tanks and sumps
- Pumping and mixing operations in oil treating systems
- Dewatering sand and coal barges
- Introducing anti-knock agents and coloring additives into gasoline
- Continuous blending, acidifying, and causticizing of oils
- Producing emulsions and pumping food products
- Pumping sand and filter clay
- Tank mixing and proportioning operations
Key Features
Self-Priming
Requires no priming and can be used for either continuous or intermittent operation.
No Moving Parts
Only periodic inspection is required — nothing to wear, break, or replace.
Corrosion Resistant
PVC construction resists dilute acids, bases, and many aqueous chemicals.
Non-Electrical
Safe for hazardous locations where electrically operated alternatives require expensive explosion-proofing.
Automatic Control
Can be adapted for automatic operation via a regulating spindle or snap valve and float arrangement.
Easy to Install
Threaded or flanged connections. Compact and light — adaptable to a variety of piping configurations.
How Water Jet Eductors Work
Pressurized motive liquid enters the eductor nozzle and is accelerated to a high-velocity jet. This jet creates a low-pressure zone at the suction inlet, drawing in the entrained fluid. The two streams mix in the combining tube and are discharged together against back pressure through the diffuser — with no moving parts involved at any stage.
The ratio of entrained flow to motive flow depends on the pressure differential and eductor geometry. Northeast Controls engineers can size the correct model for your specific motive pressure, suction conditions, and required flow rate.
1″ Model MP Capacity Data
The tables below show suction capacity (SC) and water consumption (WC) for a standard 1″ Model MP at various operating water pressures, suction lifts, and discharge pressures. For other sizes, multiply by the ratio factor in the Size Ratio table below.
0 ft Suction Lift
| Discharge (psi) | 10 psi | 20 psi | 30 psi | 40 psi | 50 psi | 60 psi | 80 psi | 100 psi |
|---|---|---|---|---|---|---|---|---|
| SC (GPM) | SC | SC | SC | SC | SC | SC | SC | SC |
| 0 psi | 5.85 | 8.1 | 9.5 | 10 | 12 | 12 | 12 | 12 |
| 5 psi | — | 1.4 | 4.1 | 6 | 8 | 10 | 11 | 12 |
| 10 psi | — | — | 0.28 | 2.3 | 4.8 | 6.4 | 8.8 | 11 |
| 15 psi | — | — | — | — | 1.2 | 3.4 | 5.9 | 8.6 |
| 20 psi | — | — | — | — | — | 0.3 | 3.5 | 5.9 |
| 25 psi | — | — | — | — | — | — | 0.83 | 3.9 |
| 30 psi | — | — | — | — | — | — | — | 1.7 |
| WC (GPM) | WC | WC | WC | WC | WC | WC | WC | WC |
| 0 psi | 3.55 | 5 | 6.1 | 7.1 | 7.9 | 8.7 | 10 | 11 |
| 5 psi | — | 4.9 | 6.1 | 7 | 7.9 | 8.6 | 10 | 11 |
| 10 psi | — | — | 5.9 | 6.8 | 7.8 | 8.5 | 9.8 | 11 |
| 15 psi | — | — | — | — | 7.7 | 8.4 | 9.8 | 11 |
| 20 psi | — | — | — | — | — | 8.2 | 9.7 | 11 |
| 25 psi | — | — | — | — | — | — | 9.6 | 11 |
| 30 psi | — | — | — | — | — | — | — | 11 |
SC = Suction Capacity · WC = Water Consumption · Motive pressure columns across top
5 ft Suction Lift
| Discharge (psi) | 10 psi | 20 psi | 30 psi | 40 psi | 50 psi | 60 psi | 80 psi | 100 psi |
|---|---|---|---|---|---|---|---|---|
| SC (GPM) | SC | SC | SC | SC | SC | SC | SC | SC |
| 0 psi | 4.4 | 6.8 | 8.6 | 9.6 | 11 | 11 | 12 | 12 |
| 5 psi | — | 1.5 | 3.2 | 5 | 7 | 9 | 11 | 11 |
| 10 psi | — | — | — | 1.9 | 3.6 | 5.6 | 8.6 | 10 |
| 15 psi | — | — | — | — | 1.1 | 2.6 | 5.8 | 8.3 |
| 20 psi | — | — | — | — | — | — | 3.3 | 5.6 |
| 25 psi | — | — | — | — | — | — | 0.47 | 3.6 |
| 30 psi | — | — | — | — | — | — | — | 1.5 |
| WC (GPM) | WC | WC | WC | WC | WC | WC | WC | WC |
| 0 psi | 3.9 | 5.3 | 6.4 | 7.3 | 8.1 | 8.8 | 10 | 11 |
| 5 psi | — | 5.2 | 6.3 | 7.2 | 8 | 8.7 | 10 | 11 |
| 10 psi | — | — | — | 7.1 | 7.9 | 8.6 | 10 | 11 |
| 15 psi | — | — | — | — | 7.8 | 8.6 | 9.9 | 11 |
| 20 psi | — | — | — | — | — | — | 9.8 | 11 |
| 25 psi | — | — | — | — | — | — | 9.8 | 11 |
| 30 psi | — | — | — | — | — | — | — | 11 |
SC = Suction Capacity · WC = Water Consumption · Motive pressure columns across top
10 ft Suction Lift
| Discharge (psi) | 10 psi | 20 psi | 30 psi | 40 psi | 50 psi | 60 psi | 80 psi | 100 psi |
|---|---|---|---|---|---|---|---|---|
| SC (GPM) | SC | SC | SC | SC | SC | SC | SC | SC |
| 0 psi | 2 | 4.6 | 6.7 | 8.3 | 9 | 10 | 10 | 10 |
| 5 psi | — | — | 2 | 4.3 | 5.9 | 7.7 | 9.9 | 10 |
| 10 psi | — | — | — | 1.1 | 3 | 4.5 | 8.1 | 9.6 |
| 15 psi | — | — | — | — | 1.1 | 2.1 | 5.6 | 7.3 |
| 20 psi | — | — | — | — | — | — | 2.8 | 5.3 |
| 25 psi | — | — | — | — | — | — | — | 2.8 |
| 30 psi | — | — | — | — | — | — | — | 1.1 |
| WC (GPM) | WC | WC | WC | WC | WC | WC | WC | WC |
| 0 psi | 4.2 | 5.5 | 6.6 | 7.4 | 8.2 | 9 | 10 | 11 |
| 5 psi | — | — | 6.5 | 7.4 | 8.2 | 8.9 | 10 | 11 |
| 10 psi | — | — | — | 7.3 | 8.1 | 8.8 | 10 | 11 |
| 15 psi | — | — | — | — | 8 | 8.7 | 10 | 11 |
| 20 psi | — | — | — | — | — | — | 9.9 | 11 |
| 25 psi | — | — | — | — | — | — | — | 11 |
| 30 psi | — | — | — | — | — | — | — | 11 |
SC = Suction Capacity · WC = Water Consumption · Motive pressure columns across top
15 ft Suction Lift
| Discharge (psi) | 10 psi | 20 psi | 30 psi | 40 psi | 50 psi | 60 psi | 80 psi | 100 psi |
|---|---|---|---|---|---|---|---|---|
| SC (GPM) | SC | SC | SC | SC | SC | SC | SC | SC |
| 0 psi | — | 3.3 | 5.3 | 7.9 | 8.4 | 8.9 | 8.9 | 9.1 |
| 5 psi | — | — | — | 4 | 4.9 | 7.3 | 8.6 | 9.1 |
| 10 psi | — | — | — | — | 2.4 | 4 | 6.4 | 8.6 |
| 15 psi | — | — | — | — | — | — | 4.2 | 6.8 |
| 20 psi | — | — | — | — | — | — | 2.1 | 4.5 |
| 25 psi | — | — | — | — | — | — | — | 1.9 |
| 30 psi | — | — | — | — | — | — | — | — |
| WC (GPM) | WC | WC | WC | WC | WC | WC | WC | WC |
| 0 psi | — | 5.7 | 6.8 | 7.6 | 8.4 | 9.1 | 10 | 12 |
| 5 psi | — | — | — | 7.6 | 8.3 | 9 | 10 | 11 |
| 10 psi | — | — | — | — | 8.2 | 9 | 10 | 11 |
| 15 psi | — | — | — | — | — | — | 10 | 11 |
| 20 psi | — | — | — | — | — | — | 10 | 11 |
| 25 psi | — | — | — | — | — | — | — | 11 |
| 30 psi | — | — | — | — | — | — | — | — |
SC = Suction Capacity · WC = Water Consumption · Motive pressure columns across top
20 ft Suction Lift
| Discharge (psi) | 10 psi | 20 psi | 30 psi | 40 psi | 50 psi | 60 psi | 80 psi | 100 psi |
|---|---|---|---|---|---|---|---|---|
| SC (GPM) | SC | SC | SC | SC | SC | SC | SC | SC |
| 0 psi | — | 2 | 4 | 6.4 | 7.8 | 7.8 | 7.8 | 7.8 |
| 5 psi | — | — | — | 2.8 | 3.9 | 6.3 | 7.8 | 7.8 |
| 10 psi | — | — | — | — | 1.2 | 3.1 | 5.7 | 7.1 |
| 15 psi | — | — | — | — | — | — | 3.6 | 5.4 |
| 20 psi | — | — | — | — | — | — | 1.4 | 3.8 |
| 25 psi | — | — | — | — | — | — | — | 1.5 |
| 30 psi | — | — | — | — | — | — | — | — |
| WC (GPM) | WC | WC | WC | WC | WC | WC | WC | WC |
| 0 psi | — | 6 | 7 | 7.8 | 8.6 | 9.3 | 11 | 12 |
| 5 psi | — | — | — | 7.7 | 8.5 | 9.2 | 10 | 12 |
| 10 psi | — | — | — | — | 8.3 | 9.1 | 10 | 12 |
| 15 psi | — | — | — | — | — | — | 10 | 11 |
| 20 psi | — | — | — | — | — | — | 10 | 11 |
| 25 psi | — | — | — | — | — | — | — | 11 |
| 30 psi | — | — | — | — | — | — | — | — |
SC = Suction Capacity · WC = Water Consumption · Motive pressure columns across top
Data shown is for water service at standard conditions. Actual performance may vary with fluid viscosity, specific gravity, and temperature. Contact Northeast Controls for sizing assistance on non-water services or conditions outside this table.
Size Ratio Factors
To find the capacity for a size other than 1″, multiply the 1″ suction capacity and water consumption values by the ratio factor for your eductor size.
| Model Number | Size | Ratio Factor | Basis |
|---|---|---|---|
| MP-04-00-PV | ½″ | 0.36 | Published |
| MP-08-00-PV | 1″ | 1.00 | Base size |
| MP-12-00-PV | 1½″ | 2.89 | Published |
| MP-16-00-PV | 2″ | 4.00 | Published |
| MP-20-00-PV | 2½″ | 6.25 | Calculated |
| MP-24-00-PV | 3″ | 9.00 | Calculated |
Example Calculation
A 1½″ eductor at 0 ft suction lift, 0 psi discharge, 40 psi operating pressure has a suction capacity of 10.0 × 2.89 = 28.9 GPM and water consumption of 7.1 × 2.89 = 20.5 GPM. A 3″ eductor under the same conditions would be 10.0 × 9.00 = 90.0 GPM suction capacity.
* 2½″ and 3″ ratio factors are calculated from the diameter-squared relationship (d/1″)². Confirm with Northeast Controls for exact sizing on these larger sizes.
Available Models & Materials
Model MP — PVC
½″, 1″, 1½″, 2″, 2½″, 3″ · Max 150°F
Other Materials Available
PPL (Polypropylene) — to 220°F
PVDF (KYNAR®) — to 250°F
Carbon Steel, Bronze, 316SS
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Submit your process conditions — motive pressure, suction lift, discharge pressure, and fluid — and we'll size and price the correct Model MP for your application.
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