| Media: | Gas, Water, Steam |
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| Material: | Ss,Carbon Steel |
| Connection Form: | Double Flange |
| Driving Mode: | Electric, Manual |
| Nominal Pressure: | PN1.0-32.0MPa |
| Channel: | Straight Through Type |
| Samples: |
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| Customization: |
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Metal Seated Ball Valve is manufactured for high temperature up to 540ºC (may be higher based on the material of body and trim) or abrasion resistance. Relia Metal Seated Ball Valves are Zero leakage (bubble tight seal). Metal Seated Ball Valve is also called metal to metal ball valve, as the seat and ball are made from metal.
For metal seated ball valve, the seat ring and ball are precisely machined, coated by high velocity oxygen fuel(HVOF) coating process and lapped to match ball, creating a positive seal for bubble-tight performance. Kamroo Metal seated trunnion ball valves have many advantages such as excellent corrosion & wear resistance, tight shut-off, smooth control, low torque, wide temperature & pressure range, as well as stability under pressure. Metal seated ball valve provide long service life with outstanding fugitive emissions performance and low operating torques in even the toughest applications.
Zero leak metal seated ball valve
The sealing between the seat and body is O-ring. It is designed for temperature below 150˚C and zero leakage warrenty. This design is for gas comprssion project ect.
Leakage Rate
Zero leakage available (MUCH higher level than ANSI/FCI 70-2 Class V shut-off, Class VI).
Types:
Metal seated trunnion ball valves and metal seated floating ball valves.
Metal Seated Trunnion Mounted Ball Valves are split-body, trunnion-mounted ball valve with spring-loaded seats with cavity relief, they are double block-and-bleed capability.
Metal seated floating ball valve is with Zero leakage for hightemperature operating conditions. Furthermore, seats with hard surface materials in Chromium Carbide, Tungsten Carbide or Stellite are also available. All Relia floating ball valve are Antistatic Design and Automatic Body Cavity Relief.
The valve plate of the high-temperature sanitary ball valve and the sealing surface of the valve seat are oblique conical structures with temperature and corrosion-resistance alloy material welded on the inclined cone surface of the valve plate. These specialized alloys allow the valve plate and seat to withstand routine wear and tear caused by corrosive chemicals and abrasive mediums.
The spring fixed between regulating ring pressure plates is assembled together with the regulating bolt on the pressure plate. This structure effectively compensates for the tolerance zone between the sleeve and the valve body as well as the valve stem's elastic deformation from the system's high pressure. These components solve the valve's sealing problem in the process of two-way interchangeable medium transportation.
High-temperature ball valve uses soft T-shaped multi-layer stainless steel sheets to form sealing rings. These additional layers of stainless steel allow the valve plate and seat to actuate and function with proper sealing despite high temperatures.
It has the dual advantage of metal hard sealing and soft sealing. Whether in low temperature or high-temperature situations, it has the sealing performance of zero leakage. Experiments suggest that in a positive flow state (the flow direction of the medium is the same as the direction of rotation of the butterfly plate), the sealing surface pressure is generated by the torque of the transmission and the effect of the medium pressure on the valve plate. When the positive medium pressure increases, the tighter the squeeze between the valve plate oblique cone surface and the valve seat sealing surface, the better the sealing effect. Essentially, as the ambient temperature increases, so does the torque applied to the valve plate, creating an even tighter seal.
In countercurrent condition, the seal between the valve plate and the valve seat in a high-temperature ball valve is produced by the torque of the transmission pressing the valve plate towards the valve seat. With the increase of the reverse medium pressure, when the positive pressure applied between the valve plate and the valve seat is smaller than the medium pressure intensity, the deformation of the spring of the regulating ring stored after the load can compensate for the tight pressure between the valve plate and valve seat sealing surface.
Material Specifications
| Item | Part Name | ASTM | DIN | ||
| Carbon steel | Stainless steel | Carbon steel | Stainless Steel | ||
| 1 | Body | A216 WCC/A352 LCC | A351 CF8M | 1.0619 / 1.6220 | 1.4408 |
| 2 | Ball | A182 F316+Cr-Carbide | 1.4401+Cr-Carbide | ||
| 3 | Seats | A182 F316+Cr-Carbide | 1.4401+Cr-Carbide | ||
| 4 | Stem | XM-19 | XM-19 | ||
| 5 | Stem Packing | Graphite | Graphite | ||
| 6 | Body Seal 1 | Graphite | Graphite | ||
| 7 | Body Seal 1 | Graphite | Graphite | ||
| 8 | Spring Seat | Inconel X 750 | Inconel X 750 | ||
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