Thermostatic Mixing Valvetap

·The JRGUMAT can protect against scalding where set to do so. The high control accuracy also ensures safety in production processes with defined temperature specifications.

Excessively hot water can scald the skin. The maximum hot water temperatures at tapping points such as faucets or shower heads should therefore be limited. Because skin damage occurs within minutes at a water temperature of between just 45 and 51°C, within seconds at 51°C and above, and within a split second at over 70°C. In buildings with sensitive uses such as hospitals, care homes, schools and nurseries, but also within in hotels or apartments, the hot water can be set to a safe maximum temperature with the JRGUMAT thermostatic mixing valve.

Thermostatic mixing valveadjustment

The DCA is the most common type of approved backflow prevention device for use in underground or in-line installations. In-line (or below-grade) simply means that the backflow device is parallel with the piping of the sprinkler system; unlike the PVB, the DCA does not have to be installed 12 inches above the highest point in the system. Some areas do require above-ground installation, so check with local authorities before installing below ground.

Thermostatic Mixing ValveBath

Thanks to their high control accuracy, JRGUMAT thermostatic mixing valves can be used for special applications, as regulating elements for maintaining temperatures or for processes requiring a constant water temperature. Wherever hands are not free to individually adjust the water temperature via a mixer tap, blended water set to the desired temperature comes in handy.

One of the downsides of PVBs is that they will occasionally eject some water. Choose a “spill-resistant” model of PVB for indoor installations or any time spillage would create a nuisance. An air gap drain is also required if the valve is installed in a basement or other interior space.

The image above shows the Febco 825Y Reduced Pressure Zone Backflow Preventer. Shop for this and other backflow preventers at SprinklerWarehouse.com.

The housing of the JRGUMAT thermostatic mixing valve is made of low-lead gunmetal. This alloy complies with the current EU lead limits and may be installed without hesitation until 2036 and used afterwards. Click here for more information on the conversion of the product range to lead-free materials.

Thermostatic Mixing Valve22mm

The temperature of the supplied hot water must be at least 5K above the desired blended water temperature for the JRGUMAT thermostatic mixing valve to function properly. Balanced hydraulic conditions at the hot and cold water inlet are crucial.

The thermostatic mixing valve works without outside energy. When integrated into a circulation system, the amount of hot water needed to cover heat losses is fed back into the storage tank or hot water generator. The rest is fed directly into the mixer.

Thermostatic mixing valvetemperature setting

Pressure vacuum breaker assemblies (PVB) are the most common, inexpensive type of whole-system backflow preventer. It consists of an inlet shutoff valve at the bottom, a single valve body consisting of a pressure vacuum breaker, a check valve, two test cocks, and an outlet shutoff valve. As well as being inexpensive, PVBs are relatively simple in design and are easy to install, maintain and repair. Some pressure vacuum breakers also offer built-in freeze protection; however, this only protects the PVB assembly. Inlet and outlet pipes can still freeze if the system isn’t properly winterized.

Thermostatic Mixing Valve15mm

When water is heated using solar energy, pellet stoves or log heaters for example, high temperatures can occur in the hot water tank. The JRGUMAT thermostatic mixing valve regulates the hot water to the desired temperature.

Reduced pressure zone assemblies come in a variety of configurations. Choose an “inline” or “straight” configuration for installation underground. For above-ground installation, consider an “n” configuration assembly for a very small footprint.

The JRGUMAT thermostatic mixing valve is an open architecture, proportionally regulating three-way mixer made of gunmetal. The blended water temperature is transferred to the thermostat. This compares the temperature with the set point. If the blended water temperature does not match the set point, the volume in the thermostat changes. This causes the valve slide to move across the pin so that more cold or hot water can flow in as required, until the blended water temperature matches the set point.

Atmospheric vacuum breakers (AVB) are the simplest and least expensive backflow preventers for one or two-zone irrigation systems. An AVB must be installed on the pipe directly after every control valve, so for systems with more than about six control valves, AVBs are not cost-effective.

Double check valves (DCV, also called double check assemblies or DCA) are a good choice for underground or indoor installations. A DCA consists of an inlet shutoff valve, two independently operating spring-loaded check valves (usually inside a single valve body), four test cocks, and an outlet shutoff valve. If local building codes allow for it, you must install Double check assemblies vertically.

The installation instructions must be followed to ensure trouble-free function of the JRGUMAT thermostatic mixing valves. The local standards and guidelines must be observed

For advice, please contact your local technical customer services team or representative. We will be happy to advise you on the correct application and installation specifications.

AVBs are also the least reliable and least often recommended. Most large cities and suburbs do not allow the use of atmospheric vacuum breakers in lawn sprinkler systems. Do not use AVBs in areas of constant pressure. This includes where shutoff valves would be located downstream where there is a potential for back pressure, or on any system that incorporates chemigation techniques.

Reduced pressure zone assemblies (RPZ), also sometimes called a reduced pressure principle assembly, is the most complex and expensive backflow preventer. However, when working properly, RPZs are the most secure and reliable of all backflow prevention devices. A reduced pressure zone assembly consists of an inlet shutoff valve, two independently operating spring-loaded check valves separated by a pressure differential relief valve, four test cocks, and an outlet shutoff valve.

On farms, for example, the JRGUMAT thermostatic mixing valve regulates the water temperature of drinking troughs for livestock or during feed preparation.

Thermostatic Mixing Valve28mm

Thermostatic mixing valvehow it works

With the JRGUMAT thermostatic mixing valve from GF Piping Systems, mixed water with a constant temperature can be ensured in an energy-efficient manner - wherever this is desired or required. It is used in different system sizes and applications. The JRGUMAT thermostatic mixing valve is extremely durable and has proven its worth for decades.

There are multiple types of backflow preventers. The three most common are the pressure vacuum breaker (PVB), the reduced pressure zone (RPZ), and the double check assembly (DCA). These are all installed in the water system immediately after the isolation valve. There is a fourth backflow preventer which is also fairly common. The atmospheric vacuum breaker (AVB) is installed in each zone of the sprinkler system. After that, it immediately follows the zone control valve. Each type of backflow device is designed to provide a different level of protection for varying commercial or residential applications. For example, hospitals and morgues, which handle large quantities of hazardous wastes on a daily basis, require much heavier-duty backflow preventers than a residential irrigation system.

Installed either above ground or inline (underground) Do not use with chemigation May be installed horizontally or vertically, but horizontally is preferred May be installed where the potential for back-siphonage or backpressure is present.

The JRGUMAT thermostatic mixing valve is also used as a thermal switch, for example in heat exchangers and hygiene storage tanks with different water temperature ranges.

JRGUMAT 3400 thermostatic mixing valves are currently available with factory-set standard temperatures (25/40/48/55°C). The individual settings range from a minimum of 20°C to a maximum of 65°C. Other types covering additional temperature ranges are available. It is possible to change the blended water temperature setting within the specified setting ranges of the respective thermostatic mixing valve.

Some localities, such as Honolulu, do not allow reduced pressure zone assemblies to be installed below grade in underground lawn sprinkler systems, while others require copper pipes on both ends of the assembly. Local codes may be especially variable and stringent on reduced pressure zone assembly, so have a thorough understanding of local requirements before proceeding.

It is possible to build a double check valve assembly from new components, but this is not the best option as there is a high risk of built assemblies not meeting local code. A better option, for convenience, cost-effectiveness, and coding restrictions, is to purchase a pre-assembled double check valve assembly.

Several factors must be taken into consideration when selecting a backflow device. These include local building codes regulating backflow preventers, the size of the landscape to be irrigated, and where the backflow preventer is going to be installed. It’s a good idea to familiarize yourself with the different types of backflow devices. It will help you to select the one that best meets your requirements.