QED EZ-4.4HF VOC Treatment Process Unit Instruction Manual

EZ-4.4HF – EZ-48.6HF
Manual No
95345

EZ-4.4HF VOC Treatment Process Unit

Process Unit for stripping dissolved volatile organic chemicals (VOCs) and gases from water using ambient air. For professional use only.
Not approved for use in European explosive atmosphere locations.
Not approved for use in explosive atmospheres or hazardous locations..
Models: EZ-4.4HF, EZ-4.6HF, EZ-6.4HF, EZ-6.6HF, EZ-8.4HF, EZ-8.6HF, EZ-12.4HF , EZ-12.6HF EZ-16.4FH, EZ-16.6HF, EZ-24.4HF, EZ-36.4HF, EZ-48.4HF AND EZ-48.6HF 50 inch-H2O Maximum Working Pressure

See page 2 for model information, including maximum working pressure and approvals.

Important Safety Instructions
Read all warnings and instructions in this manual and in the E-Z Tray Systems Manual before using the equipment. Save all instructions.

Product Models

Model Number| Maximum Working Pressure Inch- H2O (cmH2O)| Description| Nominal Air Flow: cfm (m3/min)| Max. Flow: gpm (Lpm)
---|---|---|---|---
EZ-4.4HF| EZ-4.4HF| VOC Treatment process unit| 210 (5.95)| 1-120 (4-454)
EZ-4.6HF| EZ-4.6HF| VOC Treatment process unit| 210 (5.95)| 1-120 (4-454)
EZ-6.4HF| EZ-6.4HF| VOC Treatment process unit| 320 (9.06)| 1-120 (4-454)
EZ-6.6HF| EZ-6.6HF| VOC Treatment process unit| 320 (9.06)| 1-120 (4-454)
EZ-8.4HF| EZ-8.4HF| VOC Treatment process unit| 420 (11.9)| 1-120 (4-454)
EZ-8.6HF| EZ-8.6HF| VOC Treatment process unit| 420 (11.9)| 1-120 (4-454)
EZ-12.4HF| EZ-12.4HF| VOC Treatment process unit| 600 (17.0)| 1-120 (4-454)
EZ-12.6HF| EZ-12.6HF| VOC Treatment process unit| 600 (17.0)| 1-120 (4-454)
EZ-16.4HF| EZ-16.4HF| VOC Treatment process unit| 850 (24.1)| 1-250 (4-946)
EZ-16.6HF| EZ-16.6HF| VOC Treatment process unit| 850 (24.1)| 1-250 (4-946)
EZ-24.4HF| EZ-24.4HF| VOC Treatment process unit| 1,300 (36.8)| 1-250 (4-946)
EZ-24.6HF| EZ-24.6HF| VOC Treatment process unit| 1,300 (36.8)| 1-250 (4-946)
EZ-36.4HF| EZ-36.4HF| VOC Treatment process unit| 1,900 (53.8)| 1-375 (4-1419)
EZ-36.6HF| EZ-36.6HF| VOC Treatment process unit| 1,900 (53.8)| 1-375 (4-1419)
EZ-48.4HF| EZ-48.4HF| VOC Treatment process unit| 2,600 (73.6)| 1-500 (4-1892)
EZ-48.6HF| EZ-48.6HF| VOC Treatment process unit| 2,600 (73.6)| 1-500 (4-1892)

Related Manuals

95168 EZ-Tray Manual -Full
95167 EZ Tray Manual – Box Only
95293 EZ Tray Manual Large Strippers
95165 EZ-2.XP
95166 EZ-4.XP
95164 EZ-Stacker (Box Only)
95167 EZ-Tray (Spanish)

Installation Setup

For QED supplied turn-key systems with components by other manufacturers, refer to the project specific Approval Package and supporting information. A typical example QED turn-key skid package is shown in Figure 1.
Referring to Figure 2. – install system on a level pad and secure with anchor points located on lower edge of the unit base.
Pipe influent water into the 3-inch NPT inlet port located at the top rear of the E-Z Tray process unit. Pipe effluent water to transfer pump or gravity drain into the 4-inch NPT outlet port located on the front lower right of the E-Z Tray process unit.
The E-Z Tray unit has internal water flow stilling baffles, a low exit location and integral vortex eliminator to ensure steady water flow to the transfer pump.
Gravity drains must include a water seal to prevent air exiting from the pressurized clear water sump. The water seal normally requires the addition of 2-3 ft horizontal usection in the drain. Best height of the u-section depends on water flow rate and number of tray levels (4-tray stage units or 6-tray stage units). Gravity drain piping packages are available from QED.
For pressure air inlet systems (Figure 3.), pipe blower discharge air to 4-inch air inlet port located at the side of the unit. Blower piping should include an inverted U to ensure water never drains into the blower. Blower piping should be sized to minimize losses due to pipe ID and fittings.
For induced draft air systems (Figure 3.), pipe blower air intake to 6-inch or 8-inch air exit port located on top of the stripper process unit. An open pipe inlet with a high opening should be also piped to the 4-inch or 6-inch air inlet port located at side of the unit.

Figure 1 Typical Example

Figure 2 Typical Example

Figure 3 Piping examples for pressure and induced draft modes.

Startup Operation

The blower is started before water inflow to the E-Z Tray process unit. Ensure that the blower flow throttle or air flow control valving (by QED or other) is set to deliver the appropriate air flow rate to the stripper. QED supplied blowers include an integral flow throttle in the blower discharge throat. Sump pressure is also a good indicator of proper air flow rate. In general sump pressure should range between 4-6 inch H2O per tray stage (16-24 inch H2O for 4-tray units and 24-36 inch H2O for 6tray units). The lower end of the range is typical when a unit is clean and the high end is  typical for a fouled stripper.
Most applications will require periodic air flow adjustments as the stripper fouls. Fouling increases the back pressure on the blower (delta-P across the trays), so the air throttle can be opened to offset this and maintain the required air flow rate. At some point the stripper will need to be cleaned to return to the clean delta-P across the trays. Once cleaned the blower is again throttled back as described at the start.
When shutting the stripper down it is necessary to maintain blower air flow for about 5-10 minutes to ensure that the partially treated water on the upper trays has extra contact time to strip target VOCs and/or dissolved gases. QED supplied control panels with the intermittent operation option have a shutdown timer that automatically maintains blower operation after a shutdown (including alarm driven shutdowns).

Notice
When taking the stripper off-line for extended periods of time it is recommended that the sump, pumps and other water piping elements be completely drained. This is especially important if the stripper is located in a space where freezing is possible. During normal operation the thermal mass of the water dominates, so very cold air is not a concern.

Maintenance

The most common maintenance issue with an air stripper is tray fouling due to scales and inorganic metal oxides. Bio-slimes, algae and collected solids can also cause issues. The air stripper process relies on maintaining the design air to water ratio (A/W). As stripper trays foul, built up material increases the air flow head loss across the trays. The resulting increased back pressure on the blower lowers the air flow if the blower flow throttle is not adjusted (as described, above). When the blower “turn-up” range is  exhausted the stripper trays need to be cleaned to return the system to the clean stage. Periodic cleanings can be expected at a similar interval if fouling factors remain consistent.
A main design feature of the E-Z Tray is the ease of tray access using the removable front door. Cleaning approaches will vary depending on the material that is fouling the trays. Some trays can be cleaned in place by lightly power washing the tray active areas (areas of the trays with air holes). Some fouling is harder to remove and benefits from soaking in dilute recommended acids and/or cleaning solutions.

Additional steps to make cleaning easier of less frequent can include:

• Chemical anti-fouling feeds, such as sequestering agents
• Spare tray sets to allow for cleaning or longer time soaking of fouled trays
• pH adjustment to prevent the formation of metal oxides

A web based fouling prediction tool and supporting documentation regarding fouling and prevention options can be found
here – https://www.qedenv.com/TOOLS/foulingtool/
Cleaning the E-Z Tray

The most common method used for tray cleaning is to use a pressure washer with washer wand. 2 GPM is the recommended minimum water flow at a 900 PSI maximum pressure. Equipment rental companies can usually supply this type of washer on a daily rental basis.
Washer should use a clean water supply with a capacity of at least 2 GPM at 20 PSI, connected to the pressure washer by means of an ordinary garden hose.
The QED air stripper is designed for easy cleaning. Trays can either be removed for cleaning or left in the unit and cleaned. Another option is the purchase of a spare set of trays. Spare trays can quickly be used to replace the fouled trays, reducing air stripper down-time and allowing maintenance personnel to clean the trays at their convenience.

Cleaning Steps

Step 1. Turn Off Equipment, Perform Electrical Lockout Procedure
Turn off the feed water supply and all associated electrical equipment.
Step 2. Provide for Waste Disposal
Make provisions for disposing of the sludge and waste generated during cleaning.
Step 3. Remove Stripper Door
Either remove the trays from the air stripper unit or leave them in for cleaning.
Step 4. Turn On Water and Pressure Washer
Turn on the water supply to the pressure washer. Then, turn on the pressure washer itself. Wear recommended protective goggles while spraying.

Step 5. Insert Wand into Air Stripper
(This step is for cleaning trays while they remain in the air stripper unit. If trays have been removed for cleaning, skip step 5 and proceed to step 6.) Insert the wand all the way into the door opening. Point the spray nozzle up towards the bottom of the lowest tray.

Step 6. Clean Bottom Side of Tray
Holding the wand tightly, pull the trigger to start the pressurized water flow. Expect the wand to kick back as flow starts. Move the wand side to side at a rate of about 1″ per second. Be sure to cover the entire tray bottom area. The tray holes must be cleaned of all deposits. Periodically stop the cleaning operation and inspect the cleaned area. The area is clean when there are no deposits around the aeration holes. Be sure to not remove or loosen the felt when doing this.

Step 7. Clean Top Side of Tray
Move the wand to the top side of the tray. Continue spraying with the nozzle pointed down onto the top surface of the tray. For older model E-Z Tray units, also clean the downcomer and sealpot areas. Remove all visible deposits from the tray baffles and the walls of the unit. Inspect the cleaned area for deposits.

Step 8. Repeat for all Trays
Repeat the procedure for all trays, working up to the top-most tray.

Step 9. Spray the Ceiling and Walls of the Air Stripper (optional).
Cleaning the walls and ceiling are not necessarily required for proper air stripper operation.

Step 10. Rinse
After the cleaning operation is finished, rinse the ceiling, trays, baffles and walls with the pressure washer. Work down from the top down to the sump tank. Make sure the surfaces are clean and the holes are not blocked by loosened debris.
Step 11. Check the Demister Pad and Replace as Necessary
Inspect the demister pad and clean as needed. Use the pressure sprayer to remove debris, deposits and gummy residues sometimes found on the demister pad. Demister pads that are excessively plugged should be replaced

Step 12. Inspect the Air Stripper
Visually inspect the air stripper box for the following:

1. Door gasket integrity
2. Inspect the air stripper for any damage and repair as necessary.
3. Aeration tray integrity. Inspect trays for structural damage.
4. Inspect any internal piping (on some units, typically PVC piping) and replace as necessary.

Note: Door gaskets will need to be replaced after 5-10 door openings and closings. The gasket loses some amount of sealing compression on each cycle. Tray sealing felt (located on the underside of each tray along the edges) is serviced at a lower frequency than the door gasket. Tray felt wear is based on tray removal frequency and how carefully the trays are removed and re- installed. See spare parts section for QED part numbers.

QED Air Stripper Cleaning Solution Recommendations

While pressure washing is often effective at removing scales and other solids from around stripper tray sieve holes, sometimes the scale is tightly adhered and requires a  chemical solution to soften and/or re-dissolve the solids. Care needs to be exercised in selecting cleaning chemicals to avoid damage to the stripper metal enclosure.
General Precautions – Use adequate personal protection and recommended procedures when handling cleaning chemicals (eye shields, gloves of appropriate resistance, vented area, etc.). Consult with your company’s health and safety coordinator for recommendations prior to attempting cleaning activities. An example PPE for citric acid is shown, below.
Citric Acid – QED’s general recommendation is the use of a dilute citric acid solution for scale cleaning. Dilute citric acid can be used with the standard 304 stainless steel used in the E-Z Tray systems and additionally with both 316 stainless steel and marine grade aluminum versions. Citric is also safe to use with the HDPE E-Z Stacker.
Citric acid can be purchased in powder or granular form and is added to water to create a cleaning solution. A solution of 2030% can be made  by using the following weight
to volume guide –

Other Acids – For more aggressive scales stronger acid solutions may be tested. The following is a general guide for dilute solutions in the 10-20% range. It is suggested that a small area be tested with the acid solution to evaluate effectiveness and observe any impacts on the stripper materials. Do not use hydrochloric (muriatic) acid on stainless steel (E-Z Tray version of strippers).

304 stainless steel (standard E-Z Tray) – Solutions of nitric or phosphoric acid can be used.
316 stainless steel – Solutions of nitric, phosphoric or sulfuric acid can be used.
Marine grade aluminum – Solutions of phosphoric acid can be used.
HDPE (Plastic E-Z Stacker) – Solutions of hydrochloric, nitric, phosphoric or sulfuric acid can be used.

Example MSDS PPE for a 20% citric acid solution
Personal Protective Equipment
Eyes: Wear chemical splash goggles.
Skin: Wear appropriate protective gloves to prevent skin exposure.
Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators: Follow the OSHA respirator regulations found in 29 CFR 1910.134 or European Standard EN 149. Use a NIOSH/MSHA or European Standard EN 149 approved respirator if exposure limits are exceeded or if irritation or other symptoms are experienced.

Troubleshooting

Tighten knobs
Air blowing up tray edges| Worn or damaged tray felt Tray not installed correctly| Replace tray felt Reseat tray
Water raining through air holes in trays (weeping)| Air flow rate is too low| Open blower air throttle Clean trays
Water blowing from stripper air discharge| Air flow rate is too high Demister is fouled
Water flow rate too high| Close blower air throttle Clean or replace demister Lower water flow rate
Erratic or unstable operation| Air flow rate is too high
Water flow rate exceeds unit maximum| Close blower air throttle Lower water flow rate
Unit not meeting expected removal targets| Numerous| Confirm air flow rate
Investigate — surfactants, free-phase organics, organic solids, other polar organics Contact QED Technical Support

Repair
For structural damages, spare trays and other major air stripper component issue, contact QED Technical support.

Spare Parts

Air Stripper Felt kits needed

All Models:

Door Gasket
Door Gasket
Sight tube
Door knob
Channel Flap
Door Latch
Door Latch middle| 808084 4 high
808085 6 high
807580
805042
808074
807100
807101| 1
1
1
as needed
as needed
as needed
as needed

Models: EZ-4.4HF,EZ-4.6HF,EZ-6.4HF,EZ-6.6HF,EZ-8.4HF,EZ-8.6HF,EZ-12.4HF and EZ-12.6HF

Models: EZ-16.4HF,EZ-16.6HF,EZ-24.4HF,EZ-24.6HF

Models: EZ-36.4HF,EZ-36.6HF,EZ-48.4HF,EZ-48.6HF

Specifications

Model Number| Max. Flow: gpm (Lpm)| Dry Weight: lbs (Kg)| Maximum Oper. Weight lbs. (Kg)| Maximum Operating Gallons (L)| **Number of Trays| Tray Weight lbs. (Kg)| Max Sump Working Volume: Gal (L)| Active Area: ft2 (m2) Per Level| Nominal Air Flow: cfm (m3/min)**
---|---|---|---|---|---|---|---|---|---
EZ-4.4HF| 1-120 (4-454)| 600 (272)| 1,250 (567)| 76 (287)| 4| 15 (6.8)| 53 (200)| 2.8 (.26)| 210 (5.95)
EZ-4.6HF| 1-120 (4-454)| 800 (362)| 1,545 (700)| 87 (329)| 6| 15 (6.8)| 53 (200)| 2.8 (.26)| 210 (5.95)
EZ-6.4HF| 1-120 (4-454)| 750 (340)| 1,710 (775)| 106 (401)| 4| 22(10)| 75 (283)| 4.63 (.43)| 320 (9.06)
EZ-6.6HF| 1-120 (4-454)| 960 (435)| 2,004 (909_| 122 (461)| 6| 22(10)| 75 (283)| 4.63 (.43)| 320 (9.06)
EZ-8.4HF| 1-120 (4-454)| 910 (412)| 2,080 (944)| 125 (473)| 4| 38 (17.23)| 85 (321)| 6.45 (.60)| 420 (11.9)
EZ-8.6HF| 1-120 (4-454)| 1,170 (530)| 2,512 (1140)| 145 (548)| 6| 38 (17.23)| 85 (321)| 6.45 (.60)| 420 (11.9)
EZ-12.4HF| 1-120 (4-454)| 1,240 (562)| 2,587 (1174)| 158 (598)| 4| 51 (23.13)| 107 (405)| 8.55 (.79)| 600 (17.0)
EZ-12.6HF| 1-120 (4-454)| 1,580 (716)| 3,144 (1426)| 183 (692)| 6| 51 (23.13)| 107 (405)| 8.55 (.79)| 600 (17.0)
EZ-16.4HF| 1-500 (4-1892)| 1,650 (748)| 2,119 (961)| 254 (961)| 8| 38 (17.23)| 165 (711)| 14.16 (1.32)| 850 (24.1)
EZ-16.6HF| 1-500 (4-1892)| 2,150 (975)| 2,486 (1127)| 298(1128)| 12| 38 (17.23)| 188 (711)| 14.16 (1.32)| 850 (24.1)
EZ-24.4HF| 1-500 (4-1892)| 2,300(1043)| 5,012 (2273)| 325(1230)| 8| 51 (23.13)| 211 (798)| 18.76 (1.73)| 1,300 (36.8)
EZ-24.6HF| 1-500 (4-1892)| 2,850(1292)| 6,012 (2726)| 380(1438)| 12| 51 (23.13)| 211 (798)| 18.76 (1.73)| 1,300 (36.8)
EZ- 36.4HF| 1-500(4- 1892)| 3,400 (1542)| 7957 (3609)| 612(2316)| 12| 51 (23.13)| 442 (1688)| 28.55 (2.65)| 1,900 (53.8)
EZ-36.6HF| 1-500 (4-892)| 4,200 (1905)| 8,666 (3930)| 697(2638)| 16| 51 (23.13)| 442 (1688)| 28.55 (2.65)| 1,900 (53.8)
EZ- 48.4HF| 1-500 (4-892)| 4,500 (2041)| 9,734 (4415)| 825 (3122)| 24| 51 (23.13)| 602 (2278)| 38.73 (3.60)| 2,600 (73.6)
EZ-48.6HF| 1-500 (4-892)| 5,500 (2494)| 10,694 ( 4850)| 940 (3558)| 36| 51 (23.13)| 602 (2278)| 38.73 (3.60)| 2,600 (73.6)

Removal performance is predicted with the QED Air Stripper performance model. The model can be found here – https://www.qedenv.com/TOOLS/modeler/

Model use:

1. Select the way you want the contaminants to be sorted (alphabetic or by Henry’s constant) on this page and then hit the Run Model button.
2. Select the units (metric or English) that you wish to use for data input and reporting and check all the contaminants you wish to model. Hit the Next button.
3. Enter the required data and the contaminant levels required. Hit the Next button.
4. View the output report. Use your browser’s back button to change conditions and re-model.

Model results assume –

• Contaminants are in the dissolved-phase, within a water matrix
• Stripper Influent air is contaminant-free
• Influent liquid does not have surfactants, oil, grease, other immiscible phase(s) or other Henry’s constant altering additions present, such as dissolved phase polar organic contaminants
• The air stripper is operated within the given parameters listed above and as instructed in the E-Z Tray O&M manual

The model report includes a URL that can be saved to quickly reconstruct your data form for future remodeling with changes.

Knob Removal Tool (807200)

KNOB REMOVAL:

1. Use a power drill with reverse settings and preferably use one that has a variable seeds and adjustable torque settings.
2. Keep in mind that drive tools such as these have a lot of power and torque. Refer to, understand, and foloow all safety precautions and operation instructions of such power tools prior to use.
3. Install Knob Removal Tool in appropriate drill chuck and tighten securely.
4. Set torque setting on highest setting (if equipped).
5. Set rotation of drill to counterclockwise rotation.
6. Place tool over each knob, begin certain that the tool is squarely on the knob.
7. Begin by operating the drill as you normally would and spin off each knob. Work from the bottom of the each access door up, and leave one knob at the top of each access door on so that the door will not fall off suddenly.
8. If stuck ofr stubborn knobs cannot be loosened using this methon, use a wrench first and loosen slightly.
   If rust or corrosion is present or suspected, spray each knob/stud with a light penetration oil first and let it set for some time prior to removal.

KNOB INSTALLATION:

1. Be sure all knobs are started on each stud by hand prior to using the tool.
2. Set drill to clockwise rotation.
3. Set torque setting (if equipped) to approxiately 50% of maximum torque.
4. Using the same tool, alternate from side to side, top to bottom, and diagonally to provide even sealing pressure across entire door surface. Be carful not to over tightedn any knob, which could cause damage to the access door and /or damage (strip) the interanal threads of the knob.
5. If knobs are not tight encough to provide adequate sealing pressure, incareace the torque seeing of the drill slightly to add tightenign torque and repeat as necessarey. If knobs are still not tight encough at miximum drill torque, use a wrench to tighten.

TRAY REMOVER (807201)

Rotate the tray remover down to loosen the tray. Once the tray is loose the remover is no longer needed

Downcomer Flap Installation (808074)

This is the typical water flow pattern for a single level of the air stripper. When the water drops to the next level the water flow in the opposite direction.

Equipment Warranty

QED Environmental Systems Inc. (QED) warrants to the original purchaser of its products that, subject to the limitations and conditions provided below, the products, materials and/or workmanship shall reasonably conform to descriptions of the products and shall be free of defects in materials and workmanship. Any failure of the products to conform to this warranty will be remedied by QED in the manner provided herein.

QED warrants the equipment components of its manufacture for a period of one (1) year from date of delivery. Our sole obligation during this warranty will be to repair or replace (at our option) the defective components. We are not responsible for consequential damages. Labor costs are not included.

Purchaser’s exclusive remedy for breach of said warranty shall be as follows: if, and only if, QED is notified in writing within the applicable warranty period of the existence of any such defects in the said products, and QED upon examination of any such defects, shall find the same to be within the term of and covered by the warranty running  from QED to Purchaser, QED will, at its option, as soon as reasonably possible, replace or repair any such product, without charge to Purchaser. If QED for any reason, cannot repair a product covered hereby within four (4) weeks after receipt of the original Purchaser’s notification of a warranty claim, then QED’s sole responsibility shall be, at its option, either to replace the defective product with a comparable new unit at no charge to the Purchaser, or to refund the full purchase price. In no event shall such allegedly defective products be returned to QED without its consent, and QED’s obligations of repair, replacement or refund are conditioned upon the Purchaser’s return of the defective product to QED.

IN NO EVENT SHALL QED ENVIRONMENTAL SYSTEMS INC. BE LIABLE FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES FOR BREACH OF SAID WARRANTY.

The foregoing warranty does not apply to major subassemblies and other equipment, accessories, and other parts manufactured by others, and such other parts, accessories, and equipment are subject only to the warranties supplied by their respective manufacturers. In the event of failure of any such product or accessory, QED will give assistance to Purchaser in obtaining from the respective manufacturer whatever adjustment is reasonable in light of the manufacturer’s own warranty.

THE FOREGOING WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED OR STATUTORY (INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANT ABILITY AND FITNESS FOR A PARTICULAR PURPOSE), WHICH OTHER WARRANTIES ARE EXPRESSLY EXCLUDED HEREBY, and of any other obligations or liabilities on the part of QED, and QED neither assumes nor authorizes any person to assume for it any other obligation or liability in connection with said products, materials and/or workmanship.

It is understood and agreed that QED shall in no event be liable for incidental or consequential damages resulting from its breach of any of the terms of this agreement, nor for special damages, nor for improper selection of any product described or referred to for a particular application.
This warranty will be void in the event of unauthorized disassembly of component assemblies. Defects in any equipment that result from abuse, operation in any manner outside the recommended procedures, use and applications other than for intended use, or exposure to chemical or physical environment beyond the designated limits of materials and construction will also void this warranty.

The equipment is warranted to perform as specified under the conditions specified here and within the air stripper model or QED will make the necessary changes at no cost to the owner. Some restrictions apply. Requirements for warranty consideration include, (but are not limited to):

1. Current operating conditions do not differ from the previously-modeled conditions.
2. The system should be cleaned regularly to maintain system performance.
3. The equipment is installed, operated and maintained according to QED’s instruction or non-QED manufactured subassembly manufacturer’s instructions.
4. Air stripper influent air is not “ dirty” (does not contain VOC’s, etc.).
5. No surfactants, oils, greases, immiscible phases or other Henry’s constant altering water additions present in the water.
6. Each influent contaminant does not exceed 25% of its maximum solubility under modeled conditions.

QED shall be released from all obligations under all warranties if any product covered hereby is repaired or modified by persons other than QED’s service personnel unless such repair by others is made with the consent of QED. If any product covered hereby is actually defective within the terms of this warranty, Purchaser must contact QED for determination of warranty coverage. If the return of a component is determined to be necessary, QED will authorize the return of the component, at owner’s expense. If the product proves not to be defective within the terms of this warranty, then all costs and expenses in connection with the processing of the Purchaser’s claim and all costs for repair, parts and labor as authorized by owner hereunder shall be borne by the Purchaser.

In the event of air stripper performance issues, QED may require customer to conduct a variety of troubleshooting steps. These include, but are not limited to, modifying operational parameters, cleaning air stripper system, modifying (temporarily or permanently) process piping, and obtaining reasonable and necessary influent/effluent samples. These steps are the responsibility of the customer and will be conducted by customer prior to consideration by QED for a site visit. These steps and the associated costs incurred are the responsibility of the customer, regardless of future action. Should customer request a site visit by QED or accept a site visit offer by a QED-trained technician, the visit and associated costs: a) will be the responsibility of the customer at $750/day, plus travel, lodging, and meals, if the visit finds improper sampling, process piping installation, or equipment operation inconsistent with QED’s Operation and Maintenance Manual; or b) will be the responsibility of QED if the visit finds QED  responsible for the performance issue(s) raised.

The original Purchaser’s sole responsibility in the instance of a warranty claim shall be to notify QED of the defect, malfunction, or other manner in which the terms of this warranty are believed to be violated. You may secure performance of obligations hereunder by contacting the Customer Service Department of QED and:

1. Identify the product or system involved by job number or QED order number.
2. Specifying where, when, and from whom the product was purchased.
3. Describing the nature of the defect or malfunction covered by this warranty.
4. If applicable, send the malfunctioning component, after receiving a Return Authorization Code (RAC) Number from the QED Service Department, to:

QED Environmental Systems Inc.
2355 Bishop Circle West
Dexter, MI 48130
Attn: RAC Number
(RAC provided by QED Service Dept.)

All written and visual data contained in this document reflects the latest product information available at the time of publication.
QED reserves the right to make changes at any time without notice.
Original instructions. This manual contains English.
QED Headquarters: Michigan
QED Environmental Systems, Inc. • P.O. BOX 3726 • ANN ARBOR MI 48106 • USA Copyright All Graco
manufacturing locations are registered to ISO 9001.
www.qedenv.com
www.graco.com
Revision A, November 2019
WWW.QEDENV.COM
800.624.2026734.995.2547
QED Environmental Systems Inc.
2355 Bishop Circle West Dexter, MI 48130,USA

References

• Graco Inc.
• QED - Environmental Systems and Gas Analyser Supplier

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