product description:
Top-mounted metal seal butterfly valve is multi-level three eccentric metal seal butterfly valve , based on user needs to develop the new butterfly valve products. In addition to all the excellent performance of triple eccentric multi-layer metal seal butterfly valve, but also bi-directional pressure, the top-mounted butterfly valve, one of the biggest advantages can be achieved in the field maintenance. With the choice of valve material, the temperature can be from -29 ℃ ~ 550 ℃, because of its good flow characteristics, both off the media can be closed, you can also adjust the media flow.
Application:
Body-mounted hard seal butterfly valve for medium temperature -29 ℃ -600 ℃, the nominal pressure of 0.6 ~ 2.5MPa medium for the water, steam, oil, hot air, corrosive pipes, etc., in order to achieve the cut-off fluid and adjust the media flow The purpose is a variety of pipeline on the best hoist. Body-mounted hard seal butterfly valve control: worm gear, electric, pneumatic, pipe network type Features:
1. The new top-loading structure to solve the traditional eccentric butterfly valve can not be repaired in the field. In accordance with the original multi-level three eccentric butterfly valve, when the ring is damaged, you need to return to the manufacturer repair or remember a butterfly valve scrapped. The up-mounted butterfly valve need not be removed from the pipeline, it takes only a very short time to open the valve cover can be removed together with the valve stem and disc body cavity to repair or replace the seal, then cover the valve cover seal , You can achieve during the maintenance of the valve can not affect the normal operation of the pipeline system to repair the valve caused by the loss of benefits to a minimum;
2. Multi-level three eccentric metal seal butterfly valve all the good performance;
3. Reliable sealing function, up to the gas seal no leakage;
4. Butterfly streamlined design, with high strength, large flow area, small flow resistance, energy saving.
Top-mounted butterfly valve works:
Top-mounted hard-seal butterfly valve mainly by the valve body, valve cover, disc, valve shaft, valve seals, disc seals, bushings, bottom cover, drive and other components. By rotating the butterfly hand wheel, worm wheel drive worm, worm wheel drive stem and disc, relative to the valve body within 90 degrees of freedom to rotate in order to achieve the top-mounted butterfly valve to open and close, which will also achieve the regulation of the media flow and cut off The purpose of the fluid, the butterfly valve clockwise to turn the handwheel is closed.
Hard seal butterfly valve implementation of the standard 1. Valve design, manufacturing in accordance with: "GB / T12238-1989" universal valve flange and butterfly valve connected, JB / T8527-1997 "metal butterfly valve;
2. Valve pressure test in accordance with: GB / T13927-1992 "general valve pressure test, JB / T9092-1999" valve inspection and testing;
3. Valve structure length in accordance with: GB / T12221-2005 "metal valve structure length;
4. Flange connection size according to: GB / T9113.1-2000 "flat, convex overall steel pipe flange.
Body-mounted butterfly valve main performance specifications:
| Nominal pressure (MPa) | 0.6 | 1.0 | 1.6 | 2.5 |
| Strength test pressure (MPa) | 0.9 | 1.5 | 2.4 | 3.8 |
| Seal test pressure (MPa) | 0.66 | 1.1 | 1.76 | 2.75 |
| Gas seal test pressure (MPa) | 0.6 | |||
| proper temperature | Carbon steel: -29 ℃ ~ 80 ℃; Chromium nickel steel (R, P): ≤ 200 ℃; Chromium molybdenum steel (â… ): ≤ 550 ℃. | |||
| Suitable media | Carbon steel: non-corrosive or weakly corrosive media such as water, air, natural gas and oil products; R, P: Nitric acid or acetic acid; Corrosive medium; Chromium molybdenum steel (â… ) Other media. | |||
| Drive mode | Worm gear, electric, pneumatic, hydraulic, pipe network | |||
Body-mounted butterfly valve main parts material:
Body-mounted butterfly valve parts name | Top-mounted butterfly valve material name |
Body, bonnet, butterfly plate | WCB, chrome nickel titanium steel, chrome molybdenum steel |
Seat ring | Stainless steel, number 6 |
Valve shaft | 13Cr, chrome nickel titanium steel, chrome molybdenum steel |
Disc seal | Chromium nickel steel, chromium molybdenum steel |
Filler | Flexible graphite |
Sleeve | Compound sets |
Packing gland | WCB ,, chrome nickel titanium steel, chrome molybdenum steel |
Bracket | WCB, carbon structural steel |
Nominal pressure (MPa) 0.61.01.62.5 Strength test pressure (MPa) 0.91.52.43.8 Seal test pressure (MPa) 0.661.11.762.75 Gas seal test pressure (MPa) 0.6 Applicable temperature Carbon steel: -29 ℃ ~ 80 ℃; Chromium nickel steel (R, P): ≤ 200 ℃; Chromium molybdenum steel (â… ): ≤ 550 ℃. Applicable medium Carbon steel: non-corrosive or weakly corrosive media such as water, air, natural gas and oil products; R, P: nitric acid or acetic acid; Corrosive medium; High temperature oil and other media. Worm drive, electric, pneumatic, hydraulic, pipe network
Body-mounted butterfly valve parts name
Top-mounted butterfly valve material name
Body, bonnet, butterfly plate
WCB, chrome nickel titanium steel, chrome molybdenum steel
Seat ring
Stainless steel, number 6
Valve shaft
13Cr, chrome nickel titanium steel, chrome molybdenum steel
Disc seal
Chromium nickel steel, chromium molybdenum steel
Filler
Flexible graphite
Sleeve
Compound sets
Packing gland
WCB ,, chrome nickel titanium steel, chromium molybdenum steel
Bracket
WCB, carbon structural steel