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By pexpipeman, 04/19/2011

If the hot water recirculation system from home needs to be enhanced with a pump of some sort, then deciding which model is best should be a serious job. Many factors should be taken into consideration, starting with the speed of the water flow, its temperature and pressure variations as well as the materials the pump should be made of.

Unlike the ordinary water pumps, Grundfos UP15-10SU7P is designed to match the Comfort System series, which offers all the options in one unit, is facile to install and has an excellent performance. Because of its incorporated motor protector and built-in timer, this pump never fails to do its job.

It may not be a powerful pump, having a maximum of 25W, but because of its versatility and built-in protection, this circulator pump is more dependable than others. In addition, the Comfort System includes the incorporated times and line cord, as well as the valve verifier.

One of the aspects that need to be taken into consideration when thinking of purchasing Grundfos UP15-10SU7P is that this pump model is made out of stainless steel, which decreases its resistance considerably, compared with an iron or bronze one. Subsequently, the temperature range at which it is advisable to be installed is from 4 to 65 degrees Celsius, and the maximum pressure is of 145psi. the low temperature explains the fact that Grundfos up15-10su7p tlc is usually used for cooling systems and other applications that mainly operate with cold water.

In conclusion, Grundfos UP15-10SU7P pump is probably the best choice one can make to purchase for their plumbing system. Not only is it trustworthy and reliable, but the producers also offer a two year warranty for this model, from the day it has been installed in the piping system.

Grundfos USA – Comfort Series Instant Hot Water System Grundfos up15-10su7p TLC Manual.

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By pexpipeman, 03/28/2011

To ensure minimal leaks in seals tend to minimize the pressure drop between the input to the hydraulic valve and cold “locks” with hot water. For this special set differential pressure, support drops 0,05 – 0,15 MPa or less. Sometimes the regulation of leaks by the momentum of the temperature draining from the seals. Applying Grundfos UP10-16B5 pump wear rings, to avoid stalling the rotor to avoid touching the surface seal (this is ensured by careful centering of Grundfos 10-16 pumps and correct start-up mode).

Dynamic compaction

Seal of this type on the principle of action different from the previously discussed types of seals. In this seal incorporated an element, which is a Grundfos 10-16 pump that creates a back pressure, not allowing the fluid to flow through the clearance limit shaft seal. Applying this seal, you can ensure complete sealing Grundfos 10-16 pump.

Of the dynamic seals most common seals in the Grundfos 10-16 pumps were made in the form of radial or axial flow impellers, receiving energy from a rotating shaft. Radial dynamic seals perform wheel open or closed, axial – with different thread (screw or labyrinth). The disadvantage of this type of seal is that they do not seal the shaft when the pump is stopped and can be a source of oxygenation of the pumped fluid pump.

Grundfos UP10-16B5/LC Pump, 1/2″ Sweat
Grundfos UP10-16B5/TLC Pump, 1/2″ Sweat Timer
Grundfos UP10-16B5/ATLC Pump, 1/2″ Sweat with Aquastat and Timer
Grundfos UP10-16BN5/LC Pump, 1/2″
Grundfos UP10-16BN5/TLC Pump, 1/2″ with Timer
Grundfos UP10-16BN5/ATLC Pump, 1/2″ Aquastat
Grundfos UP10-16BU/ATLC Pump with Aquastat
Grundfos UP15-10SU7P/TLC with  Comfort Valve

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By pexpipeman, 02/10/2011

Grundfos UP15-10FR

Grundfos UP15-10FR 1/25HP Cast Iron Circulator Pump (59896249) features GF 15/26 Rotated flange connections (3/4″, 1″, 1-1/4″, 1-1/2″).

This Grundfos Circulator Pump is for Closed systems with Maximum liquid temperature 230 F.

Grundfos UP15-10FR Features:

• Ceramic shaft and radial bearings;
• Carbon axial bearing;
• Stainless steel rotor can and bearing plate;
• Corrosion-resistant impeller, Composite, PES;
• Cast iron pump housing;
• Rotated flange;

Technical Specifications of Grundfos UP15-10FR:

• Speed Number: 1;
• Max flow: 7.93 US gpm;
• Head max: 5.58 ft;
• Liquid temperature range: 35.6 .. 230 F;
• Maximum operating pressure: 145 psi;
• Approvals on nameplate: UL, CSA;
• Pump housing: Cast iron;
• Pump housing: EN-JL1030;
• Pump housing: ASTM 30 B;

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By pexpipeman, 10/11/2010

Circulating pumps are called machines, which pumped air or gas from the production vessel at a pressure below atmospheric pressure and compressing it, pushed into the atmosphere. According to the principle of all the Circulating pumps can be divided into the following types:
1. Displacement pumps, which action is based on increasing volume.
2. Molecular pumps, whose operation is based on the entrapment of gas molecules moving surface.
3. Ejector and diffusion pumps. Their action is based on the capture of gas particles with a steam jet.
4. Water jet pump, whose action is based on trapping molecules of the gas tap.
5. Ion pumps, whose operation is based on the increase of charged gas particles by an electric field.
The table below shows the main parameters of Circulating pumps, manufactured by industry.

Taco 007 Circulating pumps are widely used in the chemical industry in those processes where a pressure of about 5 – 100 mm Hg. Art. These pumps are reliable and easy to maintain and can pump gases containing droplet.

Rotary oil pumps are also quite common in the chemical industry. They apply in cases where you must create a pressure about 0.5 – 0,001 mm. Hg. Art. These pumps can be used as a forevacuum for pumping large volumes of air from atmospheric pressure. These pumps can be used in chemical processes such as drying, distillation, etc. In this case, the pump has a special gazoballastnoe device. Rotary oil pumps require more care and do not let water, water-soluble acids and alkalis in the working chamber of the pump.

Rotational Circulating pumps with sliding plates are mainly used to remove the bulk of air or gas from the production capacities of large volumes, as well as to create centralized systems of pre-dilution in the chemical industry. Rotational Circulating pumps with liquid piston are widespread in the chemical industry. These pumps are simple devices and services, durable, can be applied in all processes of chemical technology, where a pressure of about 25-600 mm Hg. Art. They are indispensable in the case of compression of gases that do not allow contact with the grease, flammable at low temperature or light sparking and for other special conditions.

Steam jet Circulating pumps are mainly used in the chemical industries, where the pressure must be of the order of 1-100 mm Hg. Art. Pumps of this type are finding increasing applications in the chemical industry. A distinctive feature of these pumps is that they have no moving parts and the main working mechanism of a jet of steam.

Diffusion Circulating pumps, in which the working mechanism of a jet of mercury vapor or oil, used mainly in laboratory practice to obtain a pressure of about 2×10-6 – 3×10-7 mm. Hg. Art. These pumps can operate at pressures

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By pexpipeman, 07/09/2010

Vertical multistage centrifugal pumps, Grundfos CR 4-80 Modern autonomous heating cottages and country houses is difficult to imagine without the circulation and seal-less pumps. Today, more than half of all used worldwide circulation pumps made by Grundfos (Denmark). Among the main requirements for the circulating pumps, the following: quiet operation, low power consumption, long service life, maintenance-free operation, low cost.

The unique ceramic bearing circulators UPS Company of the 100 series provides GRUNDFOS than silence, more and unsurpassed durability. Because ceramic has a higher than steel and graphite hardness and more stable geometric dimensions of temperature changes.

Most cottages are equipped with heating thermostats. When using circulating water flow in the system is constantly changing. A strong decrease in flow in the system shifts the operating point in the area of high pressure, which leads to a significant pressure drop in the expansion valve. This raises an unpleasant noise. The question arises, what pressure should develop the pump, so as not to move “noise” threshold. It was noted that significant noise in the temperature control occurs at a pressure drop of more than 2 m.

So, to get rid of noise, it is necessary to reduce the pressure of the pump in the area of small flow. This task is very competent Grundfos Alpha – pump with proportional control of pressure (the lower the consumption of the system, the lower and pump head). Proportional regulation in such a pump is driven by built-in electronic control system and its frequency rotate. After start using additional configuration Pump Grundfos Alpha is not required, but if you want an adjustable tilt of its characteristics can be changed using the rotary knob on the terminal.

In addition to getting rid of noise in the system, pumps, Grundfos Alpha and have another important quality – low power consumption. Compared with unregulated circulating pumps of the same capacity at low cost energy savings up to 50%.

Circulating Pumps Grundfos UPS Series 100 is considered to be the most reliable in the world. Now with the advent of Grundfos Alpha to their traditional advantages (monolithic protective stainless steel sleeve with no additional rubber seals and the system of ceramic bearings), add new ones. Convenient plug will greatly facilitate the electrical pump, because this will now not need to open the terminal box. A green light will signal the feed voltage

If we talk about the cost of pumps GRUNDFOS Alpha, then it is only 25-30% higher than for the corresponding unregulated pumps. But this is a new circulating pump.