Clean, sanitary drinking water is essential for good health. For companies that are responsible for treating drinking water, clean water is essential to prevent sick customers and litigation.
The most effective method to treat drinking water is by on-line measurement and control of chlorine residual. Remote monitoring and control of the system provides visibility to status and alarms, which gives operators the opportunity to respond immediately to out-of-range conditions, thereby reducing the possibility of contamination. Data logging of measurements and events helps to better understand the performance of the treatment system, as well as prove compliance to regulations.
Walchem's W600 controller was developed specifically for these types of applications, but with simplicity and reliability for people who are not well versed in automation. The simplicity of the touchscreen allows rapid corrections to be performed without the use of programmers. The direct reading sensor reduces maintenance and provides continuous readings. Walchem has been producing these systems since 2001 and now has over 20,000 controllers in 21 countries. The cost of a total system is typically under $5,000, and can be considerably less depending on the complexity. Many small drinking water systems consist of just a flow switch or flowmeter and a chemical metering pump. These systems don’t adjust to changes in chlorine demand or varying flow rates unless a flowmeter is used. The chlorine residual is not accurately controlled, and there is no visibility of the system when the process is out of compliance. The W600 free chlorine system can eliminate these shortcomings.
W600 Free Chlorine Controllers:
- Completely Programmable from Touch Screen
- On-Screen Graphing and Variable Data Logging
- Variable Sensor Input Configurations- Walchem or 4-20 mA sensors
- Remote Communications-via Ethernet
- (6) Relays- Powered, Pulse Proportional or Dry Contacts
- Optional (2) Analog Output Card
- No reagents and continuously reading
Free Chlorine Sensors:
Walchem’s amperometric free chlorine sensors offer a cost effective and reliable solution for your disinfection control requirements. The sensors continuously and directly measure free chlorine, without the use of reagents. The sensor will accurately measure free chlorine in the 5-10 pH range without a pH sensor for compensation.
- Low maintenance - no costly reagents or tubing to replace
- Fast response - continuous measurement technique
- No waste - the sample can be returned to the process
- Long Life- typical life of sensor (3-5 years), membrane caps changed yearly
EWN-EFS-Self-Priming Chemical Pump System:
This pump system can be connected to a flow meter to provide proportional control based on the system flow. The pump control module has the capability to monitor the output of the chemical pump and increase the speed when the pump begins to lose prime, as is often the case when using sodium hypochlorite. An auto-degassing valve is included to help purge gas from the chemical pump. This type of control ensures a continuous and stable output of chlorine to the system without the need of having a person on-site.
Walchem has been involved in the control of water quality in various types of water systems for over 35 years. They have developed control products for very simple to complex water management systems. All of our products are designed to work together and with most other manufacturers’ control products. We manufacture chemical pumps, mag drive pumps and controllers for all of these systems.
Printer-friendly version