Product Descriptionhttps://bodavalve.en.made-in-china.com The
opening and closing component of the gate valve is the gate, and
the movement direction of the gate is perpendicular to the
direction of the fluid.The gate valve can only be fully opened and
fully closed, and cannot be adjusted or throttled. The gate
has two sealing surfaces, and the most commonly used mode is that
the two sealing surfaces of the gate valve form a wedge shape.The
wedge angle varies depending on the valve parameters, usually 5 °,
and when the medium temperature is not high, it is 2 ° 52
'. The gate of a wedge gate valve can be made into a whole,
called a rigid gate; It can also be made into a gate that can
produce slight deformation to improve its processability and
compensate for the deviation of the sealing surface angle during
the processing.This type of gate is called an elastic
gate. When the gate valve is closed, the sealing surface can
only rely on medium pressure to seal, that is, relying on medium
pressure to press the sealing surface of the gate plate towards the
other side of the valve seat to ensure the sealing surface, which
is self sealing. Most gate valves use forced sealing, which
means that when the valve is closed, external force is used to
forcefully press the gate plate towards the valve seat to ensure
the sealing surface is sealed. The gate plate of a gate valve
moves in a straight line with the valve stem, which is called a
rising stem gate valve, also known as a rising stem gate
valve. Usually, there is a trapezoidal thread on the lifting
rod, which transforms the rotating motion into linear motion
through the nut at the top of the valve and the guide groove on the
valve body, that is, the operating torque is converted into the
operating thrust. When opening the valve, when the lifting
height of the gate is equal to 1:1 times the valve diameter, the
fluid channel is completely unobstructed, but this position cannot
be monitored during operation. In actual use, the vertex of
the valve stem is used as the mark, that is, the position that
cannot be opened, as its fully open position. To consider the
phenomenon of lockup due to temperature changes, it is usually done
by turning back 1/2-1 turn at the top position as the fully open
valve position. Therefore, the fully open position of the
valve is determined based on the position of the gate, i.e. the
stroke. Some gate valves have a stem nut located on the gate,
and the handwheel rotates to drive the stem to rotate, causing the
gate to lift. This type of valve is called a rotary stem gate
valve, or a non rising stem gate
valve.name descriptionmaterial qualitycarbon
steel pressure0.6mpa~4mpacaliberDN40~DN450temperature-29°C
~425°Cmediumwater ,Steam ,oilConnection methodflangeDriving
methodmanualDetailed PhotosThe opening and closing component of the
gate valve is the gate, and the movement direction of the gate is
perpendicular to the direction of the fluid. The gate plate of
a gate valve moves in a straight line with the valve stem, which is
called a rising stem gate valve, also known as a rising stem gate
valve. Packing & Shipping Company
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