MECO - A worldwide leader in water purification

MECO Pure Steam generators are designed in accordance with the U.S. Pharmacopoeia, and meet or exceed cGMP/USP industry standards. This includes sanitary construction features such as double tubesheet evaporators, sloped piping and low point drains, minimum deadlegs and sanitary connections.

Each comes equipped with a feed water pump and the PID loop controls you need for stable operation. Our generators also feature a condensing and sampling system to ensure your product quality. Plus, each comes with our MASTERedge Package™, which provides even greater value. You also benefit from the expert and responsive service delivered through MECO's MASTERsupport™ service capabilities.

Vertical & Horizontal Designs

No matter what your space constraints, MECO's diverse productline of both vertical and horizontal designs will fit your needs.

State-Of-The-Art Controls

Using PID loops with transmitters and control valves on the process utilities enables the MECO Pure Steam generator to operate in a stable and uninterrupted manner regardless of external influences.

Rigid Conduit & Stainless Steel Airlines

Rigid conduit for cabling and stainless airlines are provided as part of the MASTERedge™ package on MECO Pure Steam generators. While the alternative of cable trays with exposed cabling and plastic air lines are certainly easier to install, MECO's system is more robust and less susceptible to damage creating problematic operation.

Control systems are taken for granted until a utility fluctuation within the plant has impacted your critical utility. Fluctuations in feed water pressure, plant steam pressure, etc. can have an impact on the quantity and sometimes quality of the water produced. The MECO MASTERedge package incorporates the most versatile and accurate process parameter control system into the MECO Multiple Effect Still.

Process Control basics

In the majority of process systems, there are one or more process parameters that must be maintained. The purpose of a process control scheme is to maintain a desired parameter regardless of any external influence. Process parameters in typical water systems include temperature, pressure and level. Since water systems generally utilize one or more plant utilities, it is often fluctuations in the parameters of these utilities that a process system must address. Three general schemes may be utilized to address the utility fluctuations - isolation, regulation and accommodation.

Isolate - Break Tank / Pump
One possible application of the isolation scheme is for feed water flow control in a still or steam generator. In this application, fluctuation in feed water pressure is negated by the use of a break tank. Once the feed water is in the break tank, the pressure is atmospheric regardless of the line pressure feeding the tank. The water in the tank is then supplied to the unit by a feed pump pumping against a manual feed control valve or an orifice.

Regulate - Self-contained Regulator
The regulate scheme may be used to regulate the pressure of feed water or plant steam to a still or steam generator. The regulator can be set to maintain the pressure of either of these utilities. Regulators may be a part of the utility piping external to the still or generator, or they may be integral to the unit piping. Since regulators do not offer a "closed" position, an additional automated valve is required in the downstream line. The regulate scheme only regulates the utility parameter which is not necessarily the critical parameter that must be maintained.

Accommodate - PID Loops
The accommodate scheme is similar to regulator scheme with one major exception - the utility is regulated, as necessary, to maintain the desired critical parameter.

For this scheme three primary components are required:

• Sensor to measure and transmit a signal representative of the critical parameter
• Controller to compare the actual values of the parameter to the desired value uses the difference between the two to produce an output signal to eliminate the difference
• Final control element to control the utility parameter on the output signal from the controller

These elements are usually integrated into the still or generator with the unit control system handling the controller function. This scheme provides the most accurate control of the measured parameter under all conditions.

The Proportional, Integral, and Derivative constants in the controller logic are used to calculate what the output should be relative to the measured error.

Proportional - The controllers output is proportional to the error or a change in measurement.

Integral - The controllers output is proportional to the amount of time the error is present.

Derivative - The controllers output is calculated by the rate of change of the measurement with time.

MECO MASTERedge™ Feed Water Level Control

The feed water level in the MECO Multiple Effect Still is maintained with a PID control loop. The proper feed water level is maintained in the evaporator even under fluctuating feed water pressure conditions. The PID control loop senses the actual level and adjusts the flow rate of feed water up or down to maintain the level at the desired point. Integrated into the still, this system provides precise control without the use of space-consuming external break tank / feed pump systems or external regulators. All loop parameters can be viewed from the unit's operator interface.

MECO MASTERedge™ Plant Steam Pressure Control (for pure steam option)

The pressure of the pure steam produced by the MECO Multiple Effect Still is maintained with a PID control loop. The proper pure steam pressure is maintained in the evaporator under all conditions. The PID control loop senses the actual pressure and adjusts the flow rate of plant steam up or down to maintain the pressure at the desired point. Integrated into the still, this system provides precise pressure control of the pure steam over the full range of pure steam demand. All loop parameters can be viewed from the unit's operator interface.

Q: Do I need the PID loop controls in the Master Edge Package?

A: The PID loops enable the CS unit to maintain control under varying feed water, plant steam and pure steam conditions without any manual interface. For example, when the feed water pressure fluctuates, the PID loop will open the feed valve in response to the feed water level going down. It will completely close the steam valve, if necessary, when the pure steam usage goes down to zero. Other units that utilize manual valves and flow controllers will require operator interface every time the pressure changes to one of the utilities.

The MECO Pure Steam Generator MASTERedge Package™

While MECO Pure Steam Generators are known for their craftsmanship and reliability, our MASTERedge Package™ makes them an even better value.

2 X PID Control Loops

Control systems are sometimes taken for granted until a utility fluctuation within the plant has impacted your critical utility. Fluctuations in feed water and plant steam pressure can have a direct impact on the consistency and quality of the steam produced. With 2 PID loop controls, your plant will operate in the most stable manner regardless of external influences.

Hot Standby Operation

MECO’s PID loop control system with associated control valves allows for automatic hot standby operation with instantaneous start up and positive shutoff. Conventional regulators and orifices don’t have the ability to control at a setpoint but blindly follow a load change with a proportional decrease in pressure.

Condenser and Sample System

MECO Pure Steam generators with the MASTERedge Package™ come with a condensing system and sample cooler for testing product quality.

Feed Water Pump

By fitting the MECO Pure Steam generators with a feed water pump, you have the ability to provide the generator with the supply pressure required all of the time in a compact, cost effective package. Used in conjunction with MECO’s PID loop controls, your operation will always be stable.

Natural Circulation Evaporator

Most people don’t consider the configuration of the heat transfer surface until there is a problem with the pretreatment system resulting in scale formation. MECO’s natural circulation evaporator ensures an even distribution of raw water minimizing scale formation, any scale formation that does occur is evenly distributed as well as the subsequent cleaning operation. Distribution plates and spray nozzles are a thing of the past.

Straight Annealed Tubes

By using straight tubes that have been stress relieved through annealing, we are able to get a superior surface finish. It also allows for the inspection and removal of any single tube should the need arise. U-Tubes are less expensive, but inherently stressed with the associated surface finish disruption. If problems do arise, the entire U-Tube bundle may require removal or replacement.

Standout Features Include:

• 25 Ra standard process contact surfaces
• Cabling in galvanized rigid conduit protects your electrical and instrument cables
• Stainless steel airlines properly manifolded provide the highest level of integrity for your instrument and controls
• Mirror finish cladding in stainless steel provides the highest quality appearance we have all come to expect in today’s environment

Anytime. Anywhere.

• 24 hours, 7 days a week access to effectively manage your water system.

Real Time Access to:

• Purchase spare parts online
• Track status of outstanding orders
• Review shipping information
• Review invoice/payment history
• Review online maintenance records
• Request technical information
• Online electronic manuals
• Remote system monitoring capabilities

   MECO understands the importance of providing our customers with the parts and services required to maintain systems operating at optimum capacity. Our online service center - MECO MASTERsupport™ is a good example of that. It enables you to monitor your system remotely, place orders, access service records and view your system's manuals when it's convenient for you. Anytime. Anywhere.

With a simple point and click, our entire parts inventory is available to you. Through the online service center, you also get real-time access to invoices, orders, shipping status, system manuals and service trip reports. Everything you need to know to effectively manage and maintain your treatment plant is right at your fingertips.

It's another example of MECO's commitment to providing the highest quality spare parts and cost effective support throughout the life-cycle of the product.

» Launch MASTERsupport™ Online