rising stem ball valve Description
Rising stem ball valve is a valve design that drives the ball to rotate through an exposed stem. The rise and fall of the stem is directly related to the opening and closing state of the ball, which is convenient for observing the valve opening and is suitable for industrial scenarios that require frequent operation or visual control.
Features
Exposed stem design
The stem and the ball are mechanically connected. When operated manually or electrically, the stem rises and falls synchronously with the rotation of the ball, and the valve opening and closing state is intuitively displayed.
The stem seal is made of PTFE packing or graphite composite material, with a temperature resistance of up to 350°C, and supports online replacement of seals to reduce downtime maintenance time.
Material and process
The valve body and key components are mainly made of 304/316 stainless steel, and the forging process improves the strength. The pressure resistance level covers PN16-PN40.
The surface of the ball is sprayed with tungsten carbide coating (hardness HRC72-78), which is suitable for high wear conditions containing particulate media.
Drive mode
Supports manual worm gear, pneumatic or electric actuators, and some models integrate 4-20mA signal feedback, which is suitable for DCS system remote control.
rising stem ball valve specification
|
Application |
General |
|
Place of Origin |
China |
|
Henan |
|
|
Power |
Electric |
|
Temperature of Media |
Normal Temperature |
|
Structure |
Ball |
|
Customized support |
OEM |
|
Product name |
Soft seal butterfly valve |
|
Size |
2in ,2 1/2in, 3in,4in, 5in,6in ,8in |
|
Temperature |
Normal Temperature |
rising stem ball valve
Key parameters for selection
Media compatibility
Corrosive media should preferably use 316L stainless steel valve body, and granular media should be equipped with anti-scouring valve seat.
Operation frequency
For high-frequency working conditions (＞500 times/day), pneumatic actuators are recommended, and intelligent positioning modules are used to reduce the risk of wear.
Working pressure
For high-pressure systems (≥PN25), forged valve bodies are selected, and the strength is 30%-50% higher than that of casting processes.
GNEE rising stem ball valve shortens the delivery cycle to 28 days through modular design (such as prefabricated stem components), and the cost is reduced by more than 40% compared with imported products. The selection should focus on verifying the reliability of the stem seal and the matching degree between the actuator and the working conditions to ensure long-term stable operation.
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