Frequently Asked Questions (FAQ)

Below are the questions that mostly asked by clients, along with our answers. If you need further clarification or have other questions, please do not hesitate to contact us.


1. Who are Recalyx and what are your capabilities?
We are a manufacturer of stainless steel filter housing, UV systems and other filtration products which located in Malaysia & China. Besides supplying the products, we could also provide consultation, design, fabrication, installation, commissioning, performance monitoring and training which suit your application and requirements.
2. What type of industries that Recalyx had ever served?
For the past 20 years, we had and still serving industries such as Food & Beverage, Pre-filter for R.O. & U.F. Systems, Chemical Processing, Printed Cercuit Board, Organic Solvent & Acid, Cooking Oil, Plating & Coating, Petroleum Oil & Lubes, Potable Liquid, Pharmaceutical, Waste Water, Paint Processing, Aqueous Solutions, Pre-Polymer Filtration, Metal Finishing Palm Oil, Municipal Water System, Power Plant, Oil refinery, Electronics, Boiler feed water, and others.
3. How do you know it will suit to my industry application?
With the experience of our engineering team in various industries, we could provide advices in term of feasibility, performance, cost effectiveness and problems that might occur.
4. How can I be sure of your product quality?
We are a ISO 9001 certified company. About 90% of our customers came back to us for new order; some of them had been deal with us for more than 10 years. This should be the best description of our product quality.
5. What is the product warranty period?
All equipment fabricated by us is guaranteed to be free from defects. Should defect by faulty workmanship or material develop within twelve (12) months from date of shipment, we shall then repair or replace the defective material at our cost. Warranties received from sub-suppliers are passed directly onto the client.


1. What kind of stainless steel filter housings do you manufacture?
We manufacture common cartridge filter housings, high flow cartridge filter housings, single and multi bag filter housings, sanitary grade filter housings, multimedia / sand / carbon / softening / D.I. filter vessels, membrane vessels, normal / sanitary grade water tanks, and other custom made vessels.
2. How do you assure the quality of the filter housings?
There are many brand of stainless steel material in the market, with different grade of quality and prices. We insist to use stainless steel materials from Finland which have high reputation in quality, unless special specified by customer. The production lines are operating with ISO 9001 procedures where the consistency of products quality can be guaranteed. Furthermore, all of our welders are experienced and certified, and every filter housing undergo in house hydro test before dispatch to customer
3. What design code are you applied for?
Our standard filter housings are design and fabricate according to JB code. ASME standard either with or without U-Stamp is available upon request.
4. What information should be provided to Ruickly?
  1. Capacity or flow rate of the system
  2. Feed water quality, name of liquid, pH, application
  3. Operating and maximum temperature
  4. Operating and maximum pressure
  5. Micron size require
5. Besides the standard models, can you custom made according to customer's design and dimension?
Yes, we can custom made filter housings according to detail dimension drawing from customers.
6. What is the product warranty period?
All filter housings are guaranteed to be free from defects. Should defect by faulty workmanship or material develop within twelve (12) months from date of shipment, we shall then repair or replace the defective material at our cost. Warranties received from sub-suppliers are passed directly onto the client.
7. How long will be the production lead time?
According to standard production schedule, 10 to 14 days is require but it also depends on the order quantity, material, holiday season, how urgent the products require.
8. What is the packaging material?
Filter housings with or smaller than 230 mm diameter will pack in double layer corrugated carton box with internal foam protection. Other sizes filter housings will pack in plywood box with forklift pallet.


1. Will the water supply cut off during cleaning process?
No, the filtration process is a non stop process, water supply will be running continuously during cleaning process.
2. How much water will be wasted during the cleaning process?
Cleaning time is from 10 to 60 seconds and the drain valve is from 1.5" to 3" thus the water wastage is very minimum.
3. The system is using what kind of control system?
Normally PCB but can be PLC upon request.
4. The system has to install in horizontal or vertical position?
Both series can install either in horizontal or vertical position.
5. What kind of water can fit into the system?
RZLY Series allow feed water with maximum120 PPM while RXWY Series is 60 PPM. Any water as long as within that range can be feed into the system.
6. What material available for the system?
Body material can be carbon steel with inner epoxy coated, SS 304 or SS 316L while the filter screen can be SS 304 or SS 316L.
7. What is the maximum flow rate available?
Standard models are with 4 to 4160 m3/hr flow rate, bigger flow rate can be special design upon request.

UV System

1. What is UV Dose
UV dose is the function of both the intensity of the UV radiation and the length of time the water is exposed to the UV radiation. UV dose is expressed in millijoules(mj)/centimeter squared (cm2)
2. What UV Dose do I require
UV disinfection equipment is being manufactured to a number of different dose standards and it is important to know the dose being used when flow rates are specified. The oldest standard still in use is the US Department of Health standard which recommends a dose of 16mj/cm2. This dose is still considered acceptable for applications where the UV disinfection device is used to treat for nuisance organisms that colonize filters and water softeners when used with municipal water sources. For many years the industry used a standard of 30mj/cm2 for primary disinfection. More recently leading authorities (including the US EPA and NSF) have adopted a dose of 40mj/cm2 for primary water disinfection. All our UV systems are design base on a minimal of 40mj/cm2.
3. Does the unit need to be on continuously
Yes, The UV lamp needs to operate for several minutes to reach full UV output. Excessive on/off cycling of the UV lamp will greatly reduce its life expectancy. Additionally, by having the unit on continuously the chance that untreated water will be consumed is minimized.
4. Is pre-treatment required
The UV disinfection is a physical process and the microorganisms need to be exposed to a minimum level of UV energy for effective disinfection. To ensure low maintenance reliable operation, the water to be treated must not contain any elements which significantly reduce the UV transmission of the water or elements which will form a deposit on the quartz sleeve which will lower the amount of UV light energy in the disinfection chamber. Water, which meets the following minimum guidelines, generally requires only an annual maintenance interval, consisting of lamp replacement and cleaning of the quartz sleeve.
  • Turbidity < 1 NTU
  • Suspended Solids < 10mg/L
  • Colour None
  • Total Iron < 0.3 mg/L
  • Manganese < 0.05 mg/L
  • Hardness < 7 gpg
If you are unsure as to whether your water source meets the required minimum standards, we suggest you have a sample of the water analyzed by a local water testing laboratory. We highly recommend, as a minimum, the installation of a 5 micron pre-filter before all UV disinfection equipment. If your water needs pretreatment in addition to the 5 micron pre-filter we would suggest you consult with a local water treatment dealer who is familiar with water conditions in your area.
The UV output of the UV lamp decreases slowly with age and has a useful life of 9000 hours. Beyond 9000 hours the lamp output starts degrade rapidly and disinfection performance will be suspect. UV Dynamics disinfection units are designed to provide the specified dose at the end of the useful lamp life. The integral lamp change reminder alarm will inform you of the necessity of changing the lamp. Operating the lamp beyond 9000 hours will result in ever reducing disinfection performance.
6. Why change my UV lamps when they still light up?
Ultraviolet lamps are comprised of two electrode filaments (the spring looking wire at each end), a glass and quartz combination vacuum tube, several inert gases and approximately 3 mg of mercury (Hg). These specialty lamps are designed to provide light energy in the germicidal spectrum of 254 nm (nanometer = one billionth of a meter). As they operate, they slowly loose their germicidal effectiveness. UV lamps should then be exchanged after a maximum two year installation period for several reasons, including:

The disinfection effectiveness will be significantly compromised and the system will not be able to generate UV-C light as specified. Note that even though a visible blue glow can seen though the system viewport, the glow is not UV light (which is invisible) but actually a by-product of the operation.
7. How often do I need to clean quartz sleeves? And what is the proper method of doing so?
It is recommended to regularly clean your quartz sleeves as the chemical build-up can block UV transmission and eventually lead to the degradation of the quartz wall. Depending on water quality and lamp replacement, the quartz sleeve should be hand cleaned on a periodic basis normally annually when replacing the ultraviolet lamp. You may also choose the UV system which come with manual cleaning or automatic cleaning device for easy cleaning.
8. How hot do the lamps get?
UV lamps do not produce much heat - about the same as fluorescent lamps.
9. Do the lamps need a ballast to work?
Yes - the lamp is one part of a system, and the system cannot be fully defined and optimized unless the lamp and ballast combination is determined. It is the interaction of the lamp and ballast that is the true determinant of system performance.
10. How do I monitor the function of the lamps and life spend of the lamps?
All our UV systems are come with Light Function Indication, Light & Sound Alarm System, Hours Counter as standard for easy monitoring, except HLUV Series where the Hours Counter is an optional.
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