The Torpedo Pump

Featuring The
Torpedo Pump

High Efficiency Feed Pump for
Reverse Osmosis Water Systems

Featuring The
Torpedo Pump

High Efficiency Feed Pump for
Reverse Osmosis Water Systems

Featuring The
Torpedo Pump

High Efficiency Feed Pump for
Reverse Osmosis Water Systems

Torpedo Pump Key Features

Pumps Unlimited manufactures the high efficiency Torpedo Pump for industrial Reverse Osmosis applications. Our pumps are currently installed in the most demanding locations around the world. If you need a proven pump system for high purity water for any application, the Torpedo Pump is the best solution for the following reasons:

Very high efficiency of up to 82% with a nominal of 72%. This efficiency is due to its multi-stage "turbine" design.
Very high energy efficiency which will save you month after month in lower energy bills.
No noise, due to the pump being in the water stream and inside the casing, there is no noise. You will have to check the pressure gauges to confirm if the pump is running.
No ongoing routine maintenance. Our design requires no bearings to maintain, no seals, no leaks, no scheduled preventative maintenance, which adds up to problem free operation.
Minimum skid space is required. The Torpedo Pump can be racked-up with the R.O. membranes.
Very easy retrofit capability. If you are using the Torpedo Pump in a retrofit application, you can leave the existing R.O. feed pump in place for standby service and pipe the new Torpedo Pump into the system in parallel with the existing pump.
Installation ease, you will have none of the alignment problems common to base-mounted pumps.
Motor heat is rejected to the R.O. feed water, raising the overall R.O. system efficiency.
2 Gallon Per Minute - 1200GPM flow rate.

Our multi-stage turbine pump and its motor are manufactured in stainless steel and shipped to you complete. Each pump and motor are mounted in a pressure vessel with inlet and outlet connections, and electrical cable connections ready for installation on your R.O. Skid.

We have been very successful with this pump in both new installations and in retrofitting existing R.O. systems. In many cases, we can reduce by 50% the required horsepower requirement. We have units in the field that have been in service for ten years with no downtime. Read more about the Torpedo Pump here.

60 Hertz Selection Chart

View Complete Chart

50 Hertz Selection Chart

View Complete Chart

Motor Information

General Features

High Quality, Reliable Insulation Wire

The coil conductor itself is coated with high quality insulating materials with outstanding waterproof properties. Polypropylene insulation is generally used for water tight insulated magnet wire for submersible motors, A nylon sheath is used for mechanical protection over the Polypropylene insulation layer. We use specially developed denatured Polypropylene which offers very stable waterproof characteristics. The unique insulation structure is as a result of extensive development and has proven to be of a far superior quality. This results in long insulation life even under severe operating conditions.

Operating temperature of 95F in Water

The motors operate with a flow rate O.5 ft/sec. in water temperature up to 95F without any derating of horsepower. This 95F temperature is within NEMA standards. For applications where water temperature is elevated, consult Pumps Unlimited for a high temperature motor.

High Torque Characteristics

The high quality electrical grade silicone steel laminations combined with a unique design allow for voltage variations and high torque qualities of the submersible motor.

Balancing

The rotor balance ring (one on each end of the rotor) allows for excellent dynamic balance for the rotating element of the motor.

Carbon Sleeve Bearings

Two carbon, water lubricated, bearings are used as guide bearings. These have an extremely large surface area which results in extra alignment and acts as a steady bushing.

Complete Corrosion and Water Tight Protection

All main motor components are made of 316, 304 or 304L stainless steel, this includes the casing/housing, the main shaft and all bolts.

Quality Control

All submersible motors are manufactured and tested under the most stringent quality control procedures. This assures that you receive a motor that will give you long service life and trouble free operation.

High-performance Thrust Bearing

The well established KINGSBURY design thrust bearing creates a wedge of water between the pivot shoe and carbon disc. Our innovative design permits high thrust loads to be placed on the bearings while showing no measurable wear after several years of severe duty operation. This allows for long pumping life, virtual trouble free operation and low maintenance. For all 8″ and 10″ motors, the 1,000 lbs. maximum continuous up-thrust is carried between the upper slide plate and the separate upthrust carbon bearing.

Motor Efficiency

The Torpedo Pump uses submersible motors manufactured specially for Pumps Unlimited in 304 all stainless steel construction. These motors are typical of the motors that are used in deep well applications all over the world. When you put a well pump motor 1500 feet below the ground you want it to be reliable and maintenance free. That is what you get with a Pumps Unlimited Torpedo Pump. Our motors will run for a long time under water without attention.

The Pumps Unlimited submersible motor has a maximum efficiency of approximately 85%. Total pump efficiency is equal to the mechanical pump end efficiency multiplied by the motor efficiency. For the Pumps Unlimited multi-stage Torpedo Pump only, it has a very high efficiency of approximately 72%.

Comparing the efficiency of a Centrifugal pump with a Torpedo Pump you can see the value of a submersible pump:

A) A single stage end-suction centrifugal pump, with a mechanical efficiency of 60% and a premium efficiency motor of 92% has a total pump efficiency of (.6 x .92) or 55%.

B) The Torpedo Pump with a mechanical efficiency of 72% and a motor efficiency of 84% has a total pump efficiency of (.72 x .84) or 60%.

Using a TORPEDO PUMP will then save you several thousand dollars per year in electrical energy costs. Contact us and we will help you with your energy calculations.

Noise Levels

The Torpedo Pump was originally designed for clients requesting low noise levels in reverse osmosis feed pumps. The Hewlett Packard Company was operating their RO systems in their facility’s basement right below the production floors. The noise from the old pumps were causing problems with the workers on the production floors. We built our first Torpedo Pumps to solve this problem for Hewlett Packard, since then we have gone on to become the gold standard for ultra quiet feed pumps in the microelectronics/semiconductor business, as well as the cogeneration, pharmaceutical, and beverage industries.

The reason that the Torpedo Pump is so quiet is that the pump and motor are running underwater. High-frequency sound cannot be transmitted through water, this is why submarines surface at night to send radio transmissions back to their bases. Only low frequency sound can be transmitted through water.

The Torpedo Pump is so quiet you have to check the pressure gauges to see if it is actually running. It is certainly below the noise level of the room and has been measured to be around 65 to 70 dbA. Eliminating noise is one of the main reasons why the Torpedo Pump is specified in more high-tech applications than any other RO Feed Pump in the industry.

Engineering Data

PUMPS UNLIMITED manufactures the TORPEDO PUMP (high efficiency Reverse Osmosis Feed Pump), currently the most-specified high-pressure pump for REVERSE OSMOSIS FEED APPLICATIONS.

Our TORPEDO PUMP has a very high efficiency (nominal 72%), due to its multi-stage "turbine" design, and it "pays for itself" in lower energy consumption.

Not only will your utilities bills be lowered, but you will also experience the following incidental benefits:

NO NOISE! You will have to check the gauges to find out if the pump is running.
NO MAINTENANCE! No bearings to maintain, no seals, no leaks, no scheduled preventative maintenance. NO PROBLEMS!
Minimize Skid Space - the TORPEDO PUMP can be "racked-up" with the R.O. membranes. If you are using the TORPEDO PUMP as a "retrofit", replacing an existing noisy, low efficiency feed pump, you can leave the existing R.O. feed pump(s) in place for "standby service". Pipe the new TORPEDO PUMP(s) into the system in "parallel" with the existing pump(s).
None of the alignment problems common to base-mounted pumps.
Motor heat rejected to the R.O. feed water, raising the overall R.O. system efficiency.

The TORPEDO PUMP is being "speced out" on more new RO systems than any other high efficiency pump ... we have references as well as LOCAL INSTALLATIONS that we would be pleased to offer you as references.

Our multi-stage turbine pump and its motor are manufactured in stainless steel construction, and shipped to you (or to your RO/DI System Fabricator) complete, mounted in its pressure vessel (can), with inlet, outlet, and electrical cable connections ready for installation on the R.O. Skid.

We have been very successful with this pump in both new installations, and in the retrofitof existing R.O. systems. In many cases, we can halve competitive horsepower requirements. We have units in the field that have been in service for ten years with no downtime.

Efficiency Calculator for Retrofits

PUMPS UNLIMITED manufactures the TORPEDO PUMP (high efficiency Reverse Osmosis Feed Pump), currently the most-specified high-pressure pump for REVERSE OSMOSIS FEED APPLICATIONS.

Our TORPEDO PUMP has a very high efficiency (nominal 72%), due to its multi-stage "turbine" design, and it "pays for itself" in lower energy consumption.

Not only will your utilities bills be lowered, but you will also experience the following incidental benefits:

NO NOISE! You will have to check the gauges to find out if the pump is running.
NO MAINTENANCE! No bearings to maintain, no seals, no leaks, no scheduled preventative maintenance. NO PROBLEMS!
Minimize Skid Space - the TORPEDO PUMP can be "racked-up" with the R.O. membranes. If you are using the TORPEDO PUMP as a "retrofit", replacing an existing noisy, low efficiency feed pump, you can leave the existing R.O. feed pump(s) in place for "standby service". Pipe the new TORPEDO PUMP(s) into the system in "parallel" with the existing pump(s).
None of the alignment problems common to base-mounted pumps.
Motor heat rejected to the R.O. feed water, raising the overall R.O. system efficiency.

Specifications

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PRODUCT INFORMATION

Product information does not imply that all products are available or that performance is unconditionally guaranteed. For critical applications, review specifications herein or contact us.

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Product Information

PUMPS UNLIMITED manufactures the TORPEDO PUMP (high efficiency Reverse Osmosis Feed Pump), currently the most-specified high-pressure pump for REVERSE OSMOSIS FEED APPLICATIONS.

Our TORPEDO PUMP has a very high efficiency (nominal 72%), due to its multi-stage "turbine" design, and it "pays for itself" in lower energy consumption.

Not only will your utilities bills be lowered, but you will also experience the following incidental benefits:

NO NOISE! You will have to check the gauges to find out if the pump is running.
NO MAINTENANCE! No bearings to maintain, no seals, no leaks, no scheduled preventative maintenance. NO PROBLEMS!
Minimize Skid Space - the TORPEDO PUMP can be "racked-up" with the R.O. membranes. If you are using the TORPEDO PUMP as a "retrofit", replacing an existing noisy, low efficiency feed pump, you can leave the existing R.O. feed pump(s) in place for "standby service". Pipe the new TORPEDO PUMP(s) into the system in "parallel" with the existing pump(s).
None of the alignment problems common to base-mounted pumps.
Motor heat rejected to the R.O. feed water, raising the overall R.O. system efficiency.

If you have questions or comments please e-mail us at

Pumps Unlimited.

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Differential Pressure
in feet	289	346	404	462	520
in psi	125	150	175	200	225
GPM	Recommended Pump	Recommended Pump	Recommended Pump	Recommended Pump	Recommended Pump
4	T1-13-.5	T1-18-.75	T1-18-.75	T1-22-1	T1-26-1.5
6	T2-12-.75	T2-15-1	T2-21-1.5	T2-21-1.5	T2-21-1.5
10	T2-15-1	T2-21-1.5	T2-21-1.5	T2-27-2	T2-27-2
15	T3-14-1.5	T3-18-2	T3-24-3	T3-24-3	T3-38-5

Differential Pressure
	in feet	404	462	520	578
	in meters	123	141	158	176
	in bars	11.9	13.6	15.3	17.0
GPM	M³/Hr	Recommended Pump	Recommended Pump	Recommended Pump	Recommended Pump
25	5.7	T8-30-7.5	T8-30-7.5	T8-37-7.5	T8-37-7.5
40	9.1	T8-37-7.5	T8-44-10	T8-44-10	T8-50-15
60	13.6	T17-14-15	T17-15-15	T17-17-15	T17-18-15

Featuring The Torpedo Pump

Featuring The Torpedo Pump

Featuring The Torpedo Pump

Torpedo Pump Key Features

60 Hertz Selection Chart

50 Hertz Selection Chart

Motor Information

Motor Efficiency

Noise Levels

Engineering Data

Engineering Data

Efficiency Calculator for Retrofits

Specifications

Terms of Access

Product Information

LATEST BLOG

CONTACT US

Featuring The
Torpedo Pump

Featuring The
Torpedo Pump

Featuring The
Torpedo Pump