선형리프팅 스템과 디스크의 다중 옵셋 디자인의 결합으로, 버터플라이밸브 최초로 개발하여 성공적으로 양산 시스템을 갖추었습니다. 독트한 디자인은 디스크가 유체의 흐름 방향에 수직으로 선형 이동할 수 있도록 하여 완전한 차폐 기능을 구한 하였습니다. 또한, 디스크와 시트 표면에 특수 코팅을 적용하여 제로 마찰력을 구현하여 밸브 동작시 매우 적은 힘으로 구동 할 수 있습니다.
Description | GVK 3000Series | Typical TOBV |
---|---|---|
Oset s | Multiple [6 axis] | Triple |
Stem / Disc Operating | Linear lifting / Rotaing | Rotating |
Seat ing | Rotating & Linear | Rotating |
Seat material | Solid metal to metal Metal to soft seat also available |
Metal to laminated seat (Typical) Metal to Metal seat(Special) |
Impacts(seat damage) the on seat against Flow | NO impacts | Yes, impacts on laminated seat |
Friction when seating on & off | Zero ftiction - by linearly lifting stem /disc against body seat |
None zero Friction |
Seat Shut o at full pressure rate for preferred direction | No seat Leakage under metal to metal seat | Within allowable seat Leakage rate(Laminated seat) Hard to reach(metal to metal seat) |
Seat Shut o at full pressure rate for non-pr eferred direction | No seat Leakage under metal
to metal seat |
Hard to reach(metal to Laminated seat) Hard to reach(metal to metal seat) |
Bi-dir ectional t ight shut off | Available by way of a Unique exible disc closing Mechanism |
Hard to achieve |
Seat Surface Hard facing Treatment available | Overlay wedling [Body seat & Disc seat ] TCC, CCC by HVOF |
Overlay wedling [ Body seat or disc seat ] |
Parts Repair Disc & seat replacement" | Easy & Simple to replace it on site | Hard to replace the disc & Seat on site |
Seating Tor que[BTO] |
Least Torque than ever without Rubbing on the seat |
Higher Torque than Galaxy due to unavoidable seat rubbing |
Actuator applicable |
Pneumatic, Electric & Hydraulic with Quarter turn and Linear * |
Pneumatic, Electric & Hydraulic with Quarter turn only |
Sever e Ser vice applicatio (wear & Tear , erosion) | Suitable with intact metal seat face, linear disc open, seat hard facing |
Diffcult due to laminated seat, rubbing on the seats |
Cryogenic application |
Bi-directional tight shut o is achievalbe |
Tight shut off is diffcult, especially for non-preferred direction. |
Sever e Ser vice application (cor rosion) | Suitable with TCC, CCC on the seats | TCC, CCC is not appicable |
Alternatively replaceable with Ball, Gate, Glove valve | Yes for metal seat | Few |
Fire safe | Yes with metal to metal seat design | Yes but di cult with laminated seat |
Fluid control Function for control valve | Yes, Similar to Globe valve | Yes but not much preferred inth industry |
Budget for the valves in the plant | Lower budget | costly |
* 선형 리프팅 스템/디스크는 크기가 더 작은 선형 액추에이터를 채택할 수 있습니다. 회전하는 액추에이터보다 크기와 부피가 더 큽니다.