Every PHi Hydro-Pulse mixing solution is custom designed and engineered to meet the unique requirements of each customer’s mixing application.  The PHi mixing system uses air supplied by a compressor (blower air cannot be used as the PHi system requires relatively high psi) which creates the source of the Hydro-Pulse.  The air then goes through a valve which is contained in a valve enclosure and then through piping to the forming plates which are installed at the bottom of the mixing basin.  The amount of air required is determined by the size and shape of the tank, the tank contents, and the number of forming plates installed.

Design Specifications

Excerpt from Sample Anoxic Basin Specification (PDF)



A. Mixing Valve Controller (MVC)

1. The enclosure shall be FRP with a NEMA 4X rating (as shown in PHI drawing 11-095-001). The enclosure maintains its NEMA 4X rating by utilizing Roxtex gland seal assembles for each air pipe entry. The enclosure is thermally insulated and contains a thermostatically controlled heater to allow operation to zero degrees F.

2. The injection valves are solenoid controlled and air operated. The minimum opening/closing cycle shall be less than 50 milliseconds at 80 psig. The valve body shall be silicon aluminum. Seals shall be Nitrile/Buna-N. Valve life is rated at 30 million cycles.

3. An air filter with a 5 micron element and auto drain is installed ahead of the regulator and injection valves.

4. A manually adjustable pneumatic pilot-operated regulator with pressure gage provides constant pressure to the injection valves. (factory setting 50 psig) All air components are factory tested for leaks and function.

5. Each MVC utilizes an AB MicroLogix 1100 PLC. The PLC program sets the pulse duration time at one-halve second, and allows the operator to select pulse frequency by way of a 3 position front mounted NEMA 4X selector switch. The switched is labeled LOW/MED/HIGH and the number of pulses per minute is determined by the start-up technician. (factory setting is 1,2 and3 pulses per minute)

B. Air Delivery Elements

1. Eighteen 8-inch bubble forming plates made from 304 stainless steel are required to mix all four anoxic basins. The location of each plate is shown in PHI application drawing 12-061. The construction of the bubble bubble forming plate is shown in PHI drawing DEP-8SS

Read the entire document here: Sample Anoxic Basin Specification (PDF)

Excerpt from: Sample Lift Station Specification with PHi 500 (PDF)




A. Background and Objective: Gulf Coast Waste Disposal Authority’s (GCA’S) Bayport Facility located at 10800 Bay Area Blvd., Pasadena, Tx.77505 has experienced an ongoing buildup of floating scum on the surface of the water in their Main Lift Station (MLS). See the attached drawing of the layout of the MLS (Figure 1). This situation has created an ongoing operation and maintenance problem for GCA. Currently the operators have to manually lower the level of the lift station at least once per day to remove the scum. This is both labor and time consuming and has contributed to the wear and tear of the MLS pumps. This spec is a performance spec for purchase of a Pulsed Air Mixing System to automatically control and eliminate the buildup of scum on top of the water surface in the MLS to eliminate the need for the operators to manually lower the level in the MLS to control floating scum. The manufacturer must supply a system to meet the above stated objective. The manufacturer must have a minimum of five (5) years of service in providing mixing to lift stations to control scum formation on the surface of the water.

B. Furnish a Pulsed Air Mixing System in accordance with these specifications for an independent third party to install, put into operation, and field test the pulsed air mixing system for installation at the Main Lift Station (MLS) as specified and depicted herein.

C. All necessary accessory equipment and auxiliaries, excluding connecting conduit, wire and pipe between the compressor and down coming bubblers and shall be furnished as required for a complete and operating system (See 1.06 A. 3.). Coordinate the remote monitoring signal with the existing plant-wide instrumentation and control system.

Read the entire document here: Sample Lift Station Specification with PHi 500 (PDF)

Excerpt from: Sample Water Storage Tank Specification (PDF)



This section includes the Phi large bubble mixing system, Phi controller, large bubble forming plate, air compressure package, piping, mounting plate, electrical, mechanical and appurtenances.


A. Drawings in accordance with general provisions.

B. Configuration sheet, which consists of manufacturer’s data and descriptive literature for the equipment.


A. PHi large bubbler air mixing system to include:

1. PHi 300 controller in a NEMA 4X box A-B MicroLigix 110 PLC, color touch screen OIT mounted on interior door kit, air filter-regulator, SSt internal piping, one valve, heated.

2. One large bubble plate.


The bubbler shall be manufactured by Pulsed Hydraulics, Inc. (PHi) www.phiwater.com.

Read the entire document here:  Sample Water Storage Tank Specification (PDF)

Detailed Information

Air Compressor

Photo and schematic of the air compressor.

Compressor Schematic (PDF)

Valve Enclosure

Photo of the Valve Enclosure.

2 Valve/4 Output Enclosure

Forming Plate

Photo and schematic of the Forming Plate.

Forming Plate
Forming Plate Drawing (PDF)

Typical Drawings

Examples of plate layouts for different tanks.

Technical Drawings (PDF)
Technical Drawing (PDF)