What Is a Flanged Gate Valve?
A flanged gate valve is a conventional gate valve that includes a pair of integral flange plates on the ends of the valve body. This allows the valve to be added to existing pipe flanges in a standardized system with minimal effort. A gate valve is a type that features a circular disc that is lifted or dropped within a close-fitting chamber to allow or restrict the flow of fluid through the valve. The flange plates are typically round, flat plates mounted at right angles to the fluid flow path at either end of the valve body. These plates are equipped with a row of holes around their circumference through which mounting bolts are inserted.
The gate valve is a member of the multi-turn valve family and one of the most commonly used valve types in a host of industries. They consist of a round, flat disc, or gate, which is attached to a threaded lead screw type valve stem. At the bottom of its travel, the disc closes off the flow of fluid through the valve chamber. When the valve stem is turned, the valve gate rises to open the flow path.
A flanged gate valve is a specific type that includes a pair of flange discs, one on either end of the valve body. These are typically round plates that are open at their centers cast as integral parts of the valve body. The discs are drilled with a row of holes located around their circumference that are used to mount the valve. These discs allow the flanged gate valve to be mounted onto existing flanges in standardized pipe systems. If, however, the valve needs to be mounted on a non-standardized flange, a range of adapters are available which will facilitate the installation.
To mount the flanged gate valve, it is simply placed against an existing flange and turned until the holes in the two flanges line up. Bolts are then inserted through the holes in both flanges and tensioned to secure the valve. The process is then repeated with the outgoing pipe on the other end of the valve. This non-permanent mounting method is convenient and efficient, as it allows quick and simple replacement or moving of the valve.
The flanged gate valve is typically used on large high-pressure systems in industrial and manufacturing environments. The valve flanges may be of a plain design or include a ring flange groove for the inclusion of additional sealing rings. The flanged gated valve is generally constructed of stainless steel, cast iron, or brass.
Parameter introduction of flanged gate valve：
(1). Model: Z41F46
(2). Material: With Fluorine
(3). Working Temperature:Normal Temperature
(4). Nominal Diameter: 200 mm
(5). Sealing: Hard Sealing
(6). Flow Way: One Way
(7. Type: Two General Formula
(8). Connection: Flange
(9). Driven: Hand Driven
(10). pessure surounding: Normal Pesse
(11). Nominal Pesure: 1.6 Mpa
Advantages of flanged gate valve：
1. Small fluid resistance
2. The torque for opening and closing is small, so it is easy to open and close.
3. The medium flowing direction is not restricted, and it doesn't disturb flowing and reduce the pressure of pipeline.
4. Short length structure
5. Good sealing performance
6. Simple shape, good casting process, widely used
The difference between flanged gate valve and flange butterfly valve:
Flanged gate valve is a kind of gate valve, used to cut off the flow of media in the pipeline, can only be fully open or fully closed. Its working principle is that the gate with the stem together for up and down to do linear movement, the stem has trapezoidal thread, through the nut on the top of the valve and the valve body guide groove, to achieve up and down movement of the stem, the stem drives the gate movement. The direction of movement of the gate is perpendicular to the direction of the fluid medium in the pipeline. Flanged gate valves are commonly used in a wide range of applications, commonly used in drainage, municipal construction, oil, chemical, environmental protection and other fields.
There are many kinds of flanged gate valves. According to the sealing surface, they can be divided into soft sealing gate valves and hard sealing gate valves. According to the structure, they can be divided into bright stem gate valves and dark stem gate valves.
Flanged butterfly valve is a butterfly valve, compared with the flanged gate valve, the structure of the flange butterfly valve is simpler, smaller, heavier and lighter, more suitable for making large caliber valves, and with the improvement of manufacturing technology, in some areas, the flange butterfly valve has replaced the flanged gate valve in the pipeline system application.
Flanged butterfly valve can be divided into soft sealing butterfly valve and hard sealing butterfly valve according to the sealing surface, according to the structure can be divided into midline butterfly valve, single eccentric butterfly valve, double eccentric butterfly valve and three eccentric butterfly valve.
In the driving mode, there are differences between flanged gate valve and flange butterfly valve, flanged gate valve mainly has three kinds of hand-wheel drive, pneumatic and electric; The flange butterfly valve has handle operation, turbine drive, pneumatic and electric four kinds.