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PEX Fittings

Performance of Taco pumps

Jul 10th, 2010
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To convert the obtained value of m ^ 3 / h (typically, this is the unit of measurement of performance of pumps used in technical documentation) necessary to divide it into the water density (p) at the design temperature, at 70 C it is 977.0 kg / m ^ 3.

In addition to the required filing, the Taco 007 pump with IFC must provide pressure (pressure), enough to overcome the resistance of the pipeline network. For the right choice to determine the losses in the longest line of the scheme, ie to the farthest sink.
The resistance network of pipelines leading to a loss of pressure the liquid along the length of the network. Characteristics of the flow of fluid in the system shows the total resistance to flow: the cause of the resistance of the pipeline network are the friction of water on the walls of the pipe, the friction of water droplets between a change of direction in the fixture. When changing the volume of the fluid, for example, by opening or closing the thermostatic valves, changing the speed of water and accordingly the resistance of the pipeline network.
When designing the new system possible accurate calculations taking into account the resistance of all elements of the longest line (PEX pipes, PEX fittings, fixtures and appliances), and is usually necessary information contained in the passports of the equipment. In cases with the existing district heating such calculations, usually impossible. In such situations, most often used rough estimates.
These empirical data suggest that the resistance of straight segments of the pipe (R) is the order of 100-150 Pa / m. This corresponds to the required pump head in 0,01-0,015 m by 1 m of the pipeline. The calculations must take into account the length and inlet and return line. Also on the experience, it was determined that the fittings and accessories, lost about 30% of losses in straight pipe. If the system is the expansion valve, added another 70%. At the three-way tap in the node management of the entire heating system or device that prevents the natural circulation, accounting for 20%.

Nominal pressure of PEX fitting

Jun 29th, 2010
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Nominal pressure is the only parameter PEX fitting, which ensures its durability and accounted for as operating pressure and operating temperature. Nominal pressure corresponds to the allowable working pressure of the product at normal temperatures. With increasing temperature, the mechanical properties of structural materials deteriorate. Therefore, for valves with a high operating temperature allowable working pressure is lower than conventional. This reduction depends on the material details of fixtures and the temperature dependence of the strength properties of the material. The higher operating temperature, the lower the maximum operating pressure at the same relative pressure.

To make the overall clarity in the operational and design features of the use of Taco heating valves is proposed to be classified by the following parameters:

1. by the method of the overlap of the flow;
2. on the application;
3. depending on operating environment and its parameters;
4. the material base parts;
5. by the method of administration;
6. by functional purpose;
7. by the method of accession to the pipeline;
8. largest diameter of the port area;
9. largest conditional pressure.

PEX Tubing selection

Jun 25th, 2010
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With the selection of an amorphous material from the molding machine, it becomes almost transparent. While in this state, it is treated control equipment, which uses an electric field for the continuous analysis of the finished pipe. This equipment is used field strength of 12,000 volts for every 1 / 16 inch (7500 volts per millimeter) wall thickness. Any breach in the electric field, which may arise as a result of variations in wall thickness or penetration of air or dirt, immediately gives a signal of alarm. In addition to control wall thickness and homogeneity, this time remove all gaseous remnants of the material.

Calibration apparatus and a bath with cold water is used after the control equipment. This is where PEX tubing material crystallizes and takes its characteristic milky-white color. Immediately thereafter the PEX tubing applied detailed data, cut the required length, and the tubing rolled into the bay, ready for shipment.

The magazine made a record of each bay, which specify the date, time, responsible operator and other such information. The journal also recorded data such as type of material used at any given time, and any changes in the extrusion die.

Laboratory Uponor Wirsbo takes a sample from each bay, and then exposes them to all the existing tests and inspections. Uponor Wirsbo has set the standard tolerances for internal and external diameters and wall thickness tolerances below those allowed for PEX pipe. If the deviation is 0.0008 inches (0.02 mm) from established tolerances for any of the three measurements, it is believed that the entire bay has not passed the test. Then it is cut into pieces.

Such a “formality” has serious practical purpose. If the person who installed the PEX tubing Uponor Wirsbo, should work as quickly as required by Uponor Wirsbo, PEX fittings shall immediately set correctly.

PEX Elbows for PEX Tubing Oxygen Barrier

Jun 17th, 2010
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Manufactured to ASTM F1807 standards PEX elbows fittings have been introduced in different forms and sizes according to its different functionalities. Among a variety of options one such product is the PEX 1/2” Female Threaded Drop Ear Elbow which provides a transition between PEX tubing and threaded pipe at 90 degree angle.

This model is designed to enhance the beauty of different bathroom fixtures. It is commonly used for shower fixtures and jet connections and is equipped with mounting ears. This model possess high compatibility and can be used with different connection systems such as Clamp connection systems and Crimp connection systems made up of stainless steel or copper.

Its other models are also available in different sizes of 3/4”, 3/8” and 1”. Apart from bathrooms it can be used with kitchen fixtures and other threaded fittings also. The PEX elbows fittings are resistible from being corroded and possess high durability in terms of usage. Apart from this it is easy to install which makes an optimal choice for plumbing and fitting works.

Fittings for plumbing: PEX Couplings

Jun 15th, 2010
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PEX fittings are vital to ensure the installation of the PEX tubing systems. One of the most important fittings is the PEX coupling that is increasingly being used to connect the ends of various PEX piping. PEX couplings are of utmost relevance when it comes to connecting the PEX tubing systems.

The most commonly used materials for the PEX couplings are plastic and brass. Out of these two types, plastic PEX couplings are primarily used to check the pressure. The main purpose of PEX couplings is to ensure secure installations by bending tight corners, changing sizes and splitting branches. Straight connectors are the most basic types of PEX couplings that are increasingly being used to various connections of toilets and faucets.

There are basically two types of connections that are being used which include the crimp connection and clamp connection. Copper crimp rings and crimp tools are used for the crimp connection, whereas, clamp tools and stainless steel clamps are used for the clamp connections.

How to install PEX pipe

Apr 2nd, 2010
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The choice of material from the recommended for this system is based on techno-economic analysis [7]. Selection of brand PEX pipe made of selected material to the required pressure in the system, durability and reliability [7, 8]. When selecting the manufacturer or supplier of PEX pipe should be used to read assortment of PEX pipe and PEX fittings, can be assembled with high-efficiency equipment, particularly construction and operation of PEX pipe [9].

When tracing networks should provide the device for temperature compensation of the event, reducing the likelihood of accidental damage to PEX pipe during installation and operation. The design of fixing PEX pipe and equipment shall not cause permanent or long-term stress in the material of PEX pipe. When crossing or laying of PEX pipe in building structures should include mitigation measures and the elimination of temperature and mechanical loads on the PEX pipe, as well as moisture and temperature effects of tubing on these structures.

PEX Fittings: Tees

Mar 5th, 2010
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PEX Tees

The use of PEX tubing is almost indispensible in various residential and industrial purposes. The PEX tubing is primarily preferred due its enormous strength, durability and flexibility. The material used in this type of tubing is the cross linked polyethylene. This material is quite effective as it is highly resistant to corrosion and therefore is long lasting. There is a diverse range of fittings that are used in connecting various tubes. These fittings may include couplings, elbows and tees.

PEX tees are available in various sizes like ½ inch, ¾ inch, 1 inch and 3/8 inch. These are the most common sizes that are widely used in various plumbing applications. There are various types of tees that are easily available in numerous stores and shops. Some of these may include female tees, PEX equal tees and reduced tees. These PEX tees are essentially made from brass.

The PEX tees are used to connect the tubing with the help of crimp rings made from copper and the cinch clamps in order to have safe connections.

PEX Couplings

Feb 23rd, 2010
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PEX Couplings is one of the sub parts of PEX fittings which are used to connect two ends of PEX tubing together with each other. Apart from these, PEX couplings are used to change size of pipes, turn tight corners and split off into different branches. It comes in a variety of sizes like 3/4”, 1/2”, 3/8” and 1” and is made up of high quality copper and brass.

The 1” PEX Coupling is used for crimp style PEX fittings and is very compatible and durable and can be used with different type of connection systems such as Crimp type connection systems and Clamp type connection systems. These PEX couplings can also be used to change the size of PEX tubes which are being used. The PEX couplings are also made up of plastic as this is useful for testing the pressure tolerance capacity of these couplings.

With durability and compatibility it possesses the quality of being resistant to corrosion.

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