What is A Tempering Valve?


 A tempering valve mixes hot and cold water to create water at the perfect temperature to distribute to sinks and showers. They are typically used in hotels or office buildings, anywhere where there is centralized delivery of hot water. If the water delivered is too warm, scalding can occur. If stored water is too cold, bacterial growth can occur inside the tank. The tempering valve allows hot water to be stored at a high temperature that will kill off bacteria, but then mixes it with cold water to distribute to the fixtures at a lower temperature that will not scald users.

Temperature ranges for domestic hot water systems

If water is stored below 140℉, bacterial growth can occur that can have serious health risks to building occupants. The most common bacteria is Legionella, which has been known to grow in domestic hot water systems, as well as cooling tower water. In order to kill off any existing bacteria and discourage new growth, water must be stored above 140℉. For domestic hot water systems this means that the storage tank must be maintained above this temperature. However, scalding will certainly occur if water that hot is piped directly to a sink or shower. Depending on local code hot water to fixtures should be in the range of 115-122℉. The tempering valve is installed at the outlet of the hot water storage tank, and its output is then piped out to the hot water distribution of the facility.

How a tempering valve works

There are several types of tempering valves in use today. They are all 3-way valves, meaning that they have two inputs (hot and cold water) and one output (tempered hot water). They are named based upon the type of control used to maintain the tempered hot water temperature.

A thermostatic mixing valve (TMV) has a fixed set-point and precise water temperature control. The controls are all internal to the compact valve, which is simple to install and easy to maintain.
An electronic tempering valve gives operators more flexibility by being able to adjust the set-point, monitor performance remotely, and access information on a control screen mounted away from the actual valve. These are good choices when more active monitoring of the water temperature may be required.

An example of a robust electronic tempering valve is our Heat-Timer® ETV Platinum Plus Control which can be located up to 500’ away from included control panel. This panel can communicate to larger EMS or BMS systems in the building and perfectly controls the flow of hot water through our motorized 3 way tempering valve.

Typical thermostatic and electronic valves need to be installed into the piping system by the contractor, and often require many field connections and thermostats to be hooked up correctly in order for the system to function correctly. Electronic tempering stations are a pre-plumbed unit that only need to be hooked up to hot and cold water and power, avoiding manual connection of the valve and the sensors in the field. This saves installation time and provides a more robust installation. For more information see our product page on the Electronic Tempering Station (ETS).

Plumbing Professionals Trust Heat-Timer® Valves

Heat-Timer® is dedicated to providing the highest quality domestic hot water valves on the market. Our team of technical experts can help you pick out the right valve for the job, be it a school, retail center or resort. You can rest easy knowing your systems are being reliably controlled for occupant safety and energy savings.

Contact us today and speak to a technician or visit our website at https://www.heat-timer.com.




Comments

Post a Comment

Popular posts from this blog

How Heat-Timer® Controls Can Make Your Building Management System Better

A  Building Management System  (BMS), also called Building Automation System (BAS) is a system that allows building managers to monitor and control a building’s major mechanical and safety systems in one central, easy-to-use application. A BMS can be thought of as a distributed network of building systems supervised and controlled in one central platform. The network of field controllers and other system controllers are distributed throughout the building and communicate to the BMS through a local area network. Field controllers can be general purpose, supplied by the BMS integrator and used for simple applications like lighting control, ventilation fans and building access. With a BMS, these applications can also be separated by zone, floor or other combinations to yield optimal HVAC performance. Field controllers for mission critical systems like fire alarms and heating are specialized and can act independently, as well as under BMS control. The Heat-Timer® Platinum series boil
Read more

Heat-Timer’s Wireless Sensor Integration Just got a Big Upgrade

Image
  One of the most appealing parts of the Heat-Timer® Platinum Series is the wireless sensor connectivity that comes with our Building Net internet upgrade. There are thousands of clients who own an original, non-internet capable Platinum Series control and when they upgrade the control with our Building Net internet package they actually get two major elements: An Internet/Mobile ready control – The Building Net upgrade gives any platinum control the ability to be controlled via the internet through a simple browser connection to a web management portal, or via our free mobile app. In either case, reports, alarms, control settings, and real-time monitoring are all at your fingertips, wherever those fingertips may be. Wireless Sensor Integration – You can think of this as the second network access that is enabled by the Building Net upgrade. This internal Long Range network allows you to connect our wireless space sensors to the control, which by reporting temperatures in various
Read more

Heat-Timer® ETV/ETS – Now Saving Time as well as Money..

Image
  For plumbing professionals, time IS money.  The longer a job takes, the longer your guys are tied up and can’t get to the next job. Or you have to bid the expected time so high that you never get the job in the first place. Heat-Timer® has been helping commercial plumbers for decades by providing them high quality solutions for domestic hot water systems. The most current evolution of our 3-way mixing valve, we call our ETV or Electronic Tempering Valve . This motorized mixing valve is driven by a control module that utilizes an immersion sensor to control the mix of hot and cold water to maintain a desired mixed outlet temp +/- 2 degrees. With our computer guided ETV running the show, you can keep your hot water supply heated hot enough to be safe from bacteria (See Table Below) like Legionella, while delivering a perfectly controlled hot water temperature to end users.  Heat-Timer’s ETV Now Delivered Inside the ETS The Heat-Timer Electronic Tempering Valve (E
Read more