Highlight: Bellows Globe Valve
Product introduction:
Bellows gate valve, also known as bellows sealed gate valve, forms
a metal barrier between the fluid medium and the
atmosphere through automatic roll welding to ensure zero leakage of
the valve stem. The valve stem adopts a double
sealing structure of bellows and packing to ensure leak-free
sealing at the valve stem, which is particularly suitable for
pipelines of flammable, explosive, toxic and valuable media. The
bellows are made of stainless steel or Inconel materials,
with a reasonable design of the bellows sealing structure, which is
fatigue-resistant and has a long service life.
Product technical parameters:
Type Number | WZ41H-JGPV |
Nominal Pressure PN(MPa) | 1.0 - 4.0 |
Nominal Diameter DN(mm) | 15～600 |
Test pressure (MPa) | Strength (water) | 1.5 times of pressure nominal |
Sealing (water) | 1.1 times of pressure nominal |
Sealing (Air) | 0.6 times of pressure nominal |
Sealing for bellows (water) | 1.5 times of pressure nominal |
Raw material | WCB, CF8, CF8M |
Medium suitable: | Water, steam, oil mediums |
Working temperature | -196℃～600℃ |
Connection type | Flange |
Operational method | Hand-wheel, bevel gear, pneumatic and electric actuators |
Product features:
For the bellows globe valve, the key component is the metal
bellows. The lower end is automatically roll-welded with the valve
stem assembly, and the upper end is automatically roll-welded with
the connecting plate, forming a metal barrier between the fluid
medium and the atmosphere to ensure zero leakage of the valve stem.
The valve disc adopts a conical design, and the sealing surface is
streamlined with the medium, resulting in better sealing
performance and longer service life.
The dual sealing design (bellows + packing) ensures that if the
bellows fail, the valve stem packing will also prevent leakage,
complying with international sealing standards.
The valve cover is equipped with a grease nipple, allowing direct
lubrication of the valve stem, nut, and bushing. Traditional globe
valves can only lubricate the threads.
The ergonomic handwheel design features a longer service life, easy
and convenient operation, and enhanced safety and reliability.
