Check Valve
- Check valve product descriptionVT swing check valve adopts BB(bolted bonnet), also international current single disc swing type.SeatFor different pressure or specification, there are several seat forms below:
Products Conten
| Check valve product descr1ption |
| VT swing check valve adopts BB(bolted bonnet), also international current single disc swing type. |
|
| Seat |
| For different pressure or specification, there are several seat forms below: |
| 1.Seat ring connects or welds female end body by thread for easy disassembly, maintenance and replacement. |
| 2.Directly bead welding sealing surface material on body. |
| 3.For SS valve ,popularly seat sealing surface will be processed molding directly on body. |
| Body gasket |
| The flange connection form of body and bonnet is bolt fastening. Flange sealing gasket forms below: |
| Below CLASS600 & PN10.0Mpa concave-convex gasket sealing. |
| Above (include) CLASS600 & PN10.0Mpa octagon gasket sealing. |
| The gasket is inner ring spiral wound gaskets filled graphite which abandoning rubber asbestos plate used before for making good gasket sealing and good disassembling resilience performance. |
| According to various usage and base on the body material, the VT check valve is divided into WCB series,SS (CF8,CF3,CF8M,CF3M) series, LCB and LCC series, Cr-Mo series. Main components material list below: |
| Parts | CS class | Antiacid | SS class | Cryogenic steel | High-temperature steel |
| WCB | WCB | CF8,CF3 | CF8M,CF3M | LCB,LCC | WC6,WC9,C5 |
| Body & Bonnet、Rocker | A216-WCB | A216-WCB | A351-CF8.CF3 | A351-CF8M.CF3M | A352-LCB,LCC | A217-WC6,WC9.C5 |
| Disc | A105 | A105 | A182-F304,F304L | A182-F316,F316L | A182-F304 | A182-F304 |
| Brake seat | A105、A182-F6a | A105 | A182-F304,F304L | A182-F316,F316L | A182-F304 | A182-F304 |
| Pin | A182-F6a | 318(MFG.N.O) | A182-F304,F304L | A182-F316,F316L | A182-F304 | A182-F304 |
| Stud | A193-B7 | A193-B7 | A193-B8 | A193-B8M | A320-L7 | A193-B16 |
| Nut | A194-2H | A194-2H | A194-8 | A194-8M | A194-7 | A194-16 |
| Gasket | Spiral wound gasket/mild steel |
| NOTES: |
| All casting material complies with ASTM standard, all forging material are choosen chinese grades on equal grounds with ASTM standard. |
| The material above is general product standards, we can change material according to working condition or customers' requirements and also we reserve the right of complying with standard specification for improving material. |
