Valve vane : Photo flange and blade .

Material and design features

Gate valves are usually made from high-strength cast iron, are used as shut-off valves in pipelines for different purposes.The working fluid of the pipeline system can be almost anything: water, high pressure steam, oil, oil, and even in pumping contaminated wastewater reservoirs.The main task of the flange gate valve - in the shortest possible time completely cut off the portion of the pipeline network, to prevent spills and to allow for repairs.Often

slide valve body are made of stainless steel, which significantly facilitates the device, thus greatly increasing its cost, but such products are traditionally performed in the embodiment of cast iron.The efficiency of such valves tested by decades of trouble-free operation, and flanged connections quickly take a strong liking.Reliability iron at low temperatures, of course, lower than that of steel counterparts, but the overall service life is longer as a result.

device flange gate valve on the type of shut-off (shut off the flow of the pipeline network) element is classified as:

• knife : flat vertical cutoff plate completely covers the section of the pipeline, even in the presence of a stream of mechanical impurities;
• wedge : operate on the principle of the guillotine, are in the housing seat appropriate configuration, can perfectly overlap the sewer drains and other contaminated streams, including working under high pressure.

installation method considered parts of the pipeline system its name implies: a flange.Bolted flange connection with the O-rings of high quality rubber are the best articulation of key utilities units.

Control options hinged door

It is understood that such valves installed only in horizontal pipe sections.It works in two modes just like a shop: open or closed.Intermediate variants in pressure networks can simply warp gate and "knock him out of the saddle."To change these details on the main collectors, even if it's just a local suburban water supply is well worth it.Therefore, to control the drive flange gate valve came up with several ways:

• manual: the most simple and reliable;we turn to the stop using the handwheel or the lever and the tube is blocked, the accident is localized, etc .;
• pneumatic or hydraulic drive: this is the sphere of oil and gas and other industrial pipes where control valves stalking carried automatics;
• electric: a modern version of the non-contact coordinate the work of any of engineering networks.

It should be noted that the diagram of a typical flange gate valve is extremely simple:

• cast metal body;
• gate (knife, wedge flap) with a vertical stroke;
• cabinet sealed gasket and seals;
• rope unit providing forward movement of slide by the rotation of the flywheel.

positive quality slide valves

locking systems for the data they submitted to us obvious, so we list only the main ones.

1. With proper choice of structural materials dampers able to operate in the most prohibitive conditions (temperature, the pressure load, the composition of the media, technicians errors).
2. ensures reliable overlapping systems with "severe" operating environment, including the dirty sewage.
3. Ready to repair seals, gaskets, flange gaskets can be replaced as they wear, leaving the main valve block constant.
4. Easy operation and maintenance: most of his life and no one stand in the way, clogging - easy to clean and wash.

In conclusion, some useful information: the sliding flange valve made by the diameter of the pipes 50-2200 mm, capable of withstanding the coolant temperature to 400 degrees and the operating pressure of 60 atmospheres.