Procurement | Ital Best Valve s.r.l.

Procurement

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A Complete Assortment of Products

Our company can supply you with engineering documentation, drawings, and layouts for a wide range of products including:
1. pressure vessels and their internal parts;
2. gas treatment plant;
3. skid mounted;
4. flanges;
5. fittings;
6. dismantling joints.
We develop and design all products according to the latest international standards requirements, CAD-CAM equipment and 3D dimensional software programs; the analysis of each component is just one of the many verification processes of product design we perform to meet specific client requirements.

Our mission is to provide product design support and materials engineering evaluation throughout the supply chain. We strive to contribute to the success of all production challenges and aim to achieve client satisfaction.

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Fittings

Fittings are elements used to change process media flow direction in a pipe system, to connect and joint piping and/or equipment, and to block or regulate media flow.
The most used materials and specifications for the fittings include:

– Nickel and Nickel Alloys: ASTM B-366 and ASME SB- 366;
– Stainless Steel: ASTM A-403 and ASME SA-403;
– Chrome-molybdenum: ASTM A-234 and ASME SA-234
Size is fundamental for determining the usage of a pipe fitting, including the internal and external diameters; the fitting’s internal and external diameters must correspond exactly to those of the connecting line. 
As with valves and pipes, fittings must conform to pressure classes and temperature; both parameters are very important in determining the safe and effective operation of the fitting. Temperature and pressure ranges depend on the final application, the material used etc.
As with all hydraulic components, including valves. each fitting has a specific application in the pipeline.

Fittings installed between two lengths of a pipe which change material process flow direction, usually at a 90° or 45° angle.

Union fittings are used to facilitate pipeline dismantling during maintenance.

Fittings that allow a change in pipe size to meet the pipeline’s hydraulic flow requirements.

Short pipe attachments that connect one fitting to the other.

Flanges

A flange is an external ridge used for connection purposes, For example, a flange can be found at the end of a pipe, a valve and many other metal applications.
A flange can be a plate or a ring that forms a rim when fastened to the pipe. A blind flange is a plate to cover or close the extremity of a pipe. A flange joint is a connection of pipes, where the connecting pieces have flanges at their extremities which are bolted together.
To facilitate usage, flanges are designed with standard dimensions. There exist many different flange standards.
Common world standards include ASME/BS/DIN, many of the flanges in each standard are divided into pressure classes, allowing for toleration of different pressure ratings (the most common pressure classes (ANSI/ASME) are 150#, 300#, 400#, 600#, 900#, 1500#, and 2500#). However, these classes do not correspond to maximum pressures according to psi unit since the maximum pressure generally depends on flange material and temperature. For example, the maximum pressure for a Class 150 flange is 285 psi, while a Class 300 Flange maximum pressure tolerance is 740 psi (both are for ASTM A105 Carbon Steel and for temperatures below 100°F). 
Pipe flanges are manufactured in a wide range of materials such as special steel, stainless steel, cast iron, aluminum, brass, bronze, plastic ect. The most commonly used material is forged carbon steel with machined surfaces. Flange and pipe materials are usually the same.
The most used flange types are: Welding Neck, Socket Weld and Blind flanges.

Welding Neck Flanges are recognized by their long neck which helps as a reinforcement when used in high pressure, sub-zero and elevated temperature applications.
Our welding necks conform to the latest ASME Boiler and Pressure Vessel Code requirements. They are made in Carbon, Alloy, and Stainless steel, from 150 pounds to 2500 pounds, raised face or ring jointed. Welding necks are used primarily as outlets on pressure vessels and tanks; there is a difference between regular welding neck and long welding necks because the longer neck facilitates access to the tank or vessel body.
Welding edge thickness is calculated to reduce post-welding shrinkage which would otherwise be brought about due to differences in the metal mass. Moreover, when installed between the vessel and a piping, a flanged connection facilitates the installation and removal of the equipment.

Socket Weld flanges are developed to be used on small-size high-pressure piping.

Blind Flanges are manufactured without a bore and are used to close piping extremities, valves and pressure vessel openings. For this reason blind flanges, particularly for larger sizes, are the most highly stressed flange types.

Dismantling Joint

Dismantling Joints are double-flanged fittings that accommodate longitudinal adjustment and can be locked at the required length with the supplied tie bars.
Dismantling Joints play an important role in the design and layout of pipelines and valves, because they facilitate the easy access and removal of equipment when it comes to long-term maintenance of piping systems. These joints avoid having to remove large sections of pipework by creating space and easy access to pumps, valves and flow meters. Moreover, they simplify future pipe work modifications and reduce downtime when changes need to be made, allowing for improved efficiency.
Thanks to its adjustability, the dismantling joint can be fitted next to valve, and it can be to set to the exact length required prior to being securely connected to any flanges.
Certain types of dismantling joints are also suitable for use without restraint in flexible pipelines or where a pump installed in a fixed position has to be connected to a pipe protruding from a wall.
We can provide you with a complete assortment of dismantling joints: from DN40 (1½”) to DN2400 (96”), although larger sizes and custom-made joints can be designed and built on request.

Gate Valves

Our company can provide you with a complete assortment of gate valves for high pressure and high/low temperature applications. Their efficacy have been proven over the years through their usage in thermal and nuclear power plants, as well as for other high-pressure steam and hydrocarbon processing applications.
Gate valves are commonly used in power plants, water treatment plants, mining and offshore applications.
This product has been designed to mitigate pressure reduction when the valve is fully opened and until the valve is completely closed.
This kind of valve operates using the wedge, which can be either round or rectangular. The characterizing feature of a gate valve is its flat sealed surface which appears between gate and seats. That’s why gate valves are often used when a linear flow is required.
Consequently, there are fewer obstacles to gate valve operation which, in turn, creates less turbulence within the structure.
When the valve is completely open, the wedge is lifted entirely out of the waterway, providing a full passage through the body.
Gate valves consist of three main parts: body, bonnet, and trim. The body is generally connected to other components by flanged, screwed or welded connections. The bonnet, which contains the moving parts, is connected to the body, usually with bolts, in order to allow for easy maintenance. The valve trim consists of a stem, gate, disc or wedge, and seat rings.

In the Rising Stem valve, the stem rises above the hand wheel if the valve is opened. This happens, because the stem is threaded and mated with the bushing  threads of a yoke. A Yoke is an integral part of the Rising Stem valve and is mounted to the Bonnet.

In the non-Rising Stem , there is no upward stem movement if the valve is opened. The stem is threaded onto the disk. As the hand wheel on the stem is rotated, the disk travels up or down the stem on the threads while the stem remains vertical and stationary.

Check Valve

Check Valves are “automatic” valves that open during forward flow and close during reverse flow. The pressure of the fluid, passing through a system, opens the valve, while any reversal of flow closes the valve.
The operation will vary depending on the type of check valve mechanism.
This product is used to prevent the reversal of the flow. When the valve is opened and under flow pressure, the checking mechanism will move freely in the middle, offering very little resistance and minimal pressure drop.
Generally, check valves are smaller in size and easier to install than other valves, assuring easier and more efficient maintenance.
The check valve consists of a valve body, bonnet or cover, and a disc which is attached to a hinge which swings away from the valve seat to allow the fluid to flow in the forward direction, and returns to the valve seat when upstream flow is stopped. Thus, reverse flow is prevented. In folding disc check valves, the disc consists of two halves attached in the middle. These two halves fold backward when upstream flow is initiated. Activated by a spring, the two halves quickly close the flow path. In the case of lift-check valves, the disc is in the form of a piston which is moved out of the flow path by upstream flow and then returns to the valve seat thanks to gravity, thus stopping back flow. Ball-check valves have a disc in the form of a ball.
Check valves are available in sizes from NPS ¹⁄₄ (DN 6) through NPS 72 (DN 1800). Other sizes can be made available to meet specific size requirements. A check valve may have butt welding, socket welding, threaded, or flanged ends, depending on the design requirements of a piping system.

  • Chemical Processing
  • Bleach Plants
  • Aquariums
  • Mining
  • Water Treatment
  • Landfills
  • Swimming Pools
  • Power Plants
Globe Valve

Globe valves are used to stop and regulate the flow of the process medium in a pipeline. They consist of a movable disk-type element and a stationary ring seat in a generally spherical body.
Conventional Globe valves may be used for isolation and throttling purposes. Since the entire system pressure exerted on the disc is transferred to the valve stem, the size limit for these valves is NPS 12(DN300); larger valves would require that enormous forces be exerted on the stem to open or close the valve under pressure.
This product is employed to control medium flow. The range of flow control, pressure drop and duty must be considered in the design of the valve to avert premature failure and to assure satisfactory service. Valve subjected to high-differential pressure-throttling service require specially designed valve trim.
There are three primary body designs for globe valves: tee pattern body (or Z-body), angle pattern body and wye pattern body.
With regards to valve’s construction, it has seats in a plane parallel or inclined to the flow line.
Maintenance of this product is relatively easy, as the disk and the seats can be readily replaced. This makes the valve particularly suitable for services which require frequent maintenance. Moreover, when valves are opened manually, the shorter disc travel offers advantages in less downtime, especially if valves are adjusted frequently.
For low temperature applications, globe valves are normally installed so that the pressure is under the disc. This contributes to easy operation and helps to protect packing. For high temperature applications, Globe valves are installed so that the pressure remains above the disk.
Below are the main features of globe valves:

  • Good shutoff capability
  • Moderate to good throttling capability
  • Available in tee, wye and angler patterns
  • Easy machining and seat resurfacing
  • Cooling water systems where flow needs to be regulated
  • Fuel oil system where flow is regulated and resistance to leakages is of importance
  • High-pointvents and low-point drains when resistance to leakages and safety are major considerations
  • Feed water, chemical feed, condenser air extraction, and extraction drain systems
  • Boiler vents and drains, main steam vents and drains, and heater drains
  • Turbine seals and drains
  • Turbine lube oil system and others