KSB BOA-H PN16 JL1040 Bellows Stop Valve from Germany

NegotiableUpdate on 02/12

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Overview

Application scope of German KSB BOA-H PN16 JL1040 bellows globe valve: Suitable for pipelines in chemical, refining, pharmaceutical, power, thermal petroleum, liquefied gas, steam, flammable, explosive, thermal oil, high-purity, toxic and other media.

Product Details

　　KSB BOA-H PN16 JL1040 Bellows Stop Valve from GermanyApplication scope: Suitable for pipelines in chemical, refining, pharmaceutical, power, thermal oil, liquefied gas, steam, flammable, explosive, thermal oil, high-purity, toxic and other media.

KSB BOA-H PN16 JL1040 Bellows Stop Valve from GermanyStructural characteristics:

The product structure is reasonable, the sealing is reliable, and the double sturdy and durable corrugated pipe sealing design (corrugated pipe+packing) ensures zero leakage of the valve stem.

Wear resistant, corrosion-resistant, good friction resistance, and long service life.

The valve stem undergoes quenching and surface nitriding treatment, exhibiting excellent corrosion resistance and friction resistance; Valve stem lifting position indication, more intuitive.

　　KSB BOA-H PN16 JL1040 Bellows Stop Valve from GermanyAlso known as a shut-off valve, it belongs to a forced sealing type valve, so when the valve is closed, pressure must be applied to the valve disc to force the sealing surface not to leak. When the medium enters the valve from below the valve disc, the resistance that the operating force needs to overcome is the frictional force between the valve stem and the packing, as well as the thrust generated by the pressure of the medium. The force required to close the valve is greater than the force required to open it, so the diameter of the valve stem should be larger, otherwise the valve stem bending fault may occur. The flow direction of the medium in the shut-off valve is changed to enter the valve chamber from above the valve disc. At this time, under the pressure of the medium, the force to close the valve is small, while the force to open the valve is large, and the diameter of the valve stem can be correspondingly reduced. Meanwhile, under the influence of the medium, this type of valve is also relatively tight.

When the shut-off valve is opened and the opening height of the valve disc is 25% to 30% of the nominal diameter, the flow rate has reached its maximum, indicating that the valve has reached the fully open position. So the fully open position of the shut-off valve should be determined by the stroke of the valve disc.

Classification of globe valves:

According to the direction of the channel, it can be divided into straight through globe valves and right angle globe valves

According to the flow direction of the medium, it can be divided into normally open globe valves and normally closed globe valves.

According to the working principle, it can be divided into knife type globe valves, plug valves, angle globe valves, plunger globe valves, ball globe valves, needle globe valves, diaphragm globe valves, regulating globe valves, etc.

The selection principle of globe valve:

Globe valves with the same nominal pressure and nominal diameter have equal operating torque, but the flow coefficient may not be equal.

Globe valves with different nominal pressures may not have equal operating torques, but their flow coefficients are equal.

Globe valves with the same diameter may not have the same seat diameter, but their flow coefficients are equal.

The flow coefficient of straight through globe valves is relatively large, while the flow coefficient of other types of globe valves is relatively small.

The angle type globe valve has a smaller flow coefficient, while the DC type globe valve has a larger flow coefficient.

Under the same nominal pressure, the valve body diameter of a straight through globe valve can be less than or equal to the valve body diameter of other types of globe valves.

Under the same nominal diameter, the valve body diameter of a DC globe valve can be greater than or equal to that of other types of globe valves, but not for angle globe valves.