The bellows globe valve adopts a bellows structure internally, and the lower end of the stainless steel bellows is welded to the valve stem to prevent the process fluid from corroding the valve stem. The other end is placed between the valve body and the valve cover to form a static seal. The double sealing design will prevent leakage if the bellows fails and the valve stem packing fails. The bellows is welded to the valve stem to maintain stable operating performance and avoid valve stem vibration due to valve plug vibration.
- Materials:CS-C25, 1.7363,1.4308,1.4408,WCB,CF8,CF8M...
- Size:DN50~DN400
- Class:;PN16~PN64
- Connection:RF,RTJ,BW
- Standard:DIN EN 13709
- Face to Face:DIN EN1092-1
- Flanged End:DIN EN 588-1
Part Material
|
NO. |
Part name |
Material |
|
1 |
Body |
GS-C25,GGG-40,1.4401 |
|
2 |
Seat |
1.4301,Stellite |
|
3 |
Disc |
1.4021,1.4401+ Stellite |
|
4 |
Pin |
1.4301,1.4401 |
|
5 |
Bellow assemble |
1.4301,1.4401 |
|
6 |
Stem |
1.4021,1.4301,1.4401 |
|
7 |
Gasket |
Flexible graphite + stainless steel |
|
8 |
Cover |
GS-C25,GGG-40,1.4401 |
|
9 |
Nut |
ASTM 194-2H,A194-8 |
|
10 |
Double-headed bolt |
ASTM 194-B7,A193-B8 |
|
11 |
Packing |
Flexible graphite |
|
12 |
Gland |
1C25,1.4301,1.4401 |
|
13 |
Locator |
1C25 |
|
14 |
Stem nut |
Copper alloy,D2,BL2 |
|
15 |
Hand wheel |
Carbon steel |
|
16 |
Cap |
1C45 |
Bellows globe valves have the following advantages compared with traditional globe valves:
1. Double sealing design (bellows + packing). If the bellows fails, the valve stem packing will also prevent leakage and comply with international sealing standards.
2. There is no fluid loss, reducing energy loss and improving factory equipment safety.
3. The bellows stop valve has a long service life, reduces the number of maintenance times and reduces operating costs.
4. The sturdy and durable bellows seal design ensures zero leakage of the valve stem and provides maintenance-free conditions.
5. The gas medium valve seat adopts PTFE soft sealing material to improve the sealing performance of this valve.
6. The valve seat with high temperature resistance ≤425℃ adopts cone surface hard sealing. Achieve air tightness and zero leakage.
Bellow Steel Valve
Bellow Globe Valve Supplier-GNEE
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