Q647FM pneumatic ash discharge ball valve
I. Introduction:
Pneumatic ash discharge ball valves are suitable for long-distance pipelines and general industrial pipelines. Special considerations have been made in their design regarding strength, safety, and resistance to harsh environments, making them applicable to various corrosive and non-corrosive media. During operation, the force generated by the fluid pressure upstream of the valve on the sphere is fully transmitted to the bearings, preventing the sphere from moving toward the valve seat. As a result, the valve seat is not subjected to excessive pressure, so fixed ball valves have low torque, minimal valve seat deformation, stable sealing performance, and a long service life. Pneumatic ball valves are suitable for high-pressure, large-diameter pipeline applications. The advanced spring pre-tensioned valve seat assembly features a self-tightening characteristic, achieving upstream sealing. Each valve is equipped with two valve seats, which can seal in both directions, so there is no flow direction restriction during installation, making it bidirectional. This valve is available in two body structures: two-piece and three-piece. The middle flange is connected by bolts, and the seal uses reinforced PTFE embedded in a stainless steel ring. A spring is provided at the rear of the steel ring to ensure the valve seat is in close contact with the sphere and maintains sealing. Both the upper and lower valve stems of the valve are equipped with PTFE bearings to reduce friction and enable easy operation. The bottom of the small shaft has an adjustment piece to ensure the contact position between the sphere and the sealing ring. The full-bore structure of the pneumatic valve ensures that the flow diameter of the valve is consistent with the inner diameter of the pipeline, facilitating pipeline cleaning.
II. Product Features:
1. The manual part can use a steel plate-pressed handle or a stainless steel cast handle. The handle is equipped with a limit structure to set limits at the open and closed positions of the valve. When the valve is used in key equipment, the limit block is provided with a lock hole to lock the open/closed position and prevent misoperation. The handle is clearly marked with "open" and "close" indicators.
2. The valve stem is integrally forged from A182F (1Cr13) and undergoes tempering treatment, with a hardness reaching HB220～250. The valve stem is connected to the handle via a flat key, spline, or square wedge, offering excellent versatility and easy disassembly and assembly. The valve stem is designed with a blowout-proof structure.
3. The valve packing is made of braided flexible graphite sealing rings or PTFE sealing rings, enabling reliable sealing of the valve stem under certain lubrication conditions. 4. As required, the ball valve can be designed with an anti-static structure. Conductive springs are installed between the sphere and the valve stem, and between the valve stem and the valve body to prevent static sparks from igniting flammable substances and ensure system safety.
5. The sealing pairs have various forms. Soft sealing, hard sealing, fire-resistant valve seats, and other structures can be selected according to different working conditions; float-type structures are used for DN less than 150, and fixed ball structures are used for DN less than 200.
6. An auxiliary sealing structure can be provided at the valve seat of the ball valve. A grease injection valve is installed at the valve seat and valve stem for temporary sealing in emergency situations. The valve stem can also be lengthened as needed to adapt to buried pipeline applications.
III. Part Materials:
Serial No. | Part Name | Material | ||
Q647MF-C | Q647MF-P | Q647MF-R | ||
1 | Valve Body | WCB | ZG1Cr18Ni9Ti | ZG1Cr18Ni12Mo2Ti |
2 | Ball Disc | 2Cr13 | 1Cr18Ni9Ti | 1Cr18Ni12Mo2Ti |
3 | Valve Stem | 2Cr13 | 1Cr18Ni9Ti | 1Cr18Ni12Mo2Ti |
4 | Sealing Ring | Reinforced PTFE, polyphenylene oxide | ||
5 | Packing | PTFE, flexible graphite | ||
Applicable Medium | Lime, coal powder, coal ash | Nitric acid | Acetic acid | |
Applicable Temperature | -28℃～300℃ | |||
IV. External Dimensions:
Nominal Pressure | Nominal Diameter | Dimensions (mm) | ||
L | W | H | ||
1.6 | 25 | 165 | 235 | 298 |
32 | 178 | 235 | 304 | |
40 | 190 | 330 | 370 | |
| Machinery & Equipment/Valves/Ball Valves | |
