Today, pipelines are constantly used in the industry for the transportation of various working environments. A flange wedge gate valve with a sliding spindle has become quite popular. With its help, it is possible to shut off the supply of the working substance to a selected section of the network without any problems. To do this is quite simple, you just need to block the through hole with a locking element.
Where are gate valves used?
Flanged wedge gate valves with a sliding spindle are made with a diameter of 15 to 2000 mm. Their main purpose is to install pipelines into the system, the temperature in which does not exceed 550 degrees Celsius, and the pressure is not more than 25 MPa. In addition, the source material, which was used for the production of valves, greatly affects the scope of application. The most common raw material for the manufacture of flange wedge gate valves with a sliding spindle is steel. They are used in the following areas:
- Housing and utilities. It is installed on central piping systems related to water supply or heating.
- It is often installed on transportation lines used in the energy and oil and gas industries.
- Widely used in the manufacturing industry. It is mounted on pipelines supplying bulk, liquid or vaporous substances.
Stainless Steel Gate Valves and Design Features
In addition to the production of flanged wedge gate valves with a sliding spindle made of steel, models are also made of stainless material. Since they are highly resistant to corrosion, they are most widely used in the chemical and pharmaceutical industries.
This type of shut-off valve also differs in that it cannot be used as a control device. The reason for this was that the locking element of the structure should always be in the extreme position of "closed" or "open". If you neglect this and leave the element turned only halfway in one of the sides, then this will significantly accelerate the wear of the internal sealing parts, which will lead to a quick failure of the entire part.
What are the benefits of a valve?
If we talk about the operational characteristics and advantages of flange wedge gate valves with a sliding spindle, then it is necessary to highlight the following:
- Reliability, ease of repair and ease of assembly.
- Hydraulic resistance is minimal.
- The dimensions of the device are quite small.
- It is possible to equip the equipment with a hydraulic, mechanical or pneumatic drive.
- The installation or dismantling process is very simple, since a flange-type connection is used.
The disadvantages of the device
As with any device, a wedge steel flanged gate valve with a sliding spindle has some disadvantages. The main disadvantage was that it requires a large height for installation. The reason for this requirement was that when the shutter element is fully open, the spindle completely leaves the housing. Therefore, a lot of free space is required.
It is worth noting that this problem can be solved by installing shut-off valves with non-rising spindle. However, in this case, you will have to sacrifice the turning speed, since the retractable model opens much faster than the fixed one.
Among the disadvantages, it is also worth highlighting that such devices wear out the sealing elements located on the saddles and the shutter rather quickly. This is due to the presence of constant friction. For this reason, it is often necessary to carry out scheduled repairs that require the dismantling of the entire device.
Model Description 30s41nzh
One of the common gate valve models is 30s41nzh. It can be produced in several versions. This is done in order to be able to install on pipelines of different diameters. The marking of these devices is almost the same, only one remote control parameter (diameter) is different. For example, there is a model 100 16. This valve 30s41nzh is characterized by the following parameters:
- mounted on pipelines with a diameter of 100 mm;
- wedge-type constipation system;
- flange connection type;
- maximum working temperature - 425 degrees;
- maximum pressure - 16 bar;
- type of material used for production - steel;
- can be mounted in vertical or horizontal position;
- has a manual drive.
A flange wedge gate valve with a sliding spindle 30s41nzh can also be of the following types: DU50 RU16, DU80 RU16, DU100 RU16, DU150 RU16, etc., up to a maximum diameter of 500 mm. One of the rather convenient features of the model is that the running thread is located outside, which greatly facilitates the care of it. The presence of a flange type of connection allows you to connect the device to the pipeline without the use of a welding machine. In addition, when repair or replacement is required, dismantling is also very simple.
Use, timing, benefits 30s41nzh
A valve of this type can be installed both on overhead pipelines and on underground utilities. However, this will require the arrangement of a special well in order to have access to equipment. In addition, it is actively operated at special facilities where the process of transporting such working substances as water, heat (steam) and other non-aggressive media is constantly carried out. It is worth noting that the weight of the valves is quite large. For example, the model DN50 RU 16 will weigh 25 kg, and the dimensions are 180 x 410 mm. A model suitable for installation on a pipeline with a diameter of 400 mm will weigh 425 kg and a height of 1570 mm.
If you follow all the rules of operation, then we can confidently say that the valve can last up to 10 years. The most important thing is to periodically lubricate all the functional components of the structure in order to avoid corrosion of parts. One of the main advantages of this type of shut-off valve is that there is a wide selection of standard sizes for any pipe diameter. If we talk about the price of a wedge gate valve with a sliding spindle, then it will depend on the diameter. For example, a device with a small diameter will cost 3,400 rubles. A valve with an average diameter of 150 mm will cost 29,800 rubles.