Technical
Figure . 5 Figure . 6 Figure . 7
• A body , floating ball ( tungsten-carbide { TC } coated ) with 12 mm bore with two floating seats ( TC coated ) with radial seals , and a handle that can be taken off to prevent accidental operation of the valve .
Figure . 8 Figure . 9 Figure . 10
Figure . 11 Figure . 12
An outlet , one 1 ⁄ 4 ” NPT for connecting the gauge , one ∞ ” NPT for connecting the service valve and in some cases two ∞ ” NPT for an additional connection for TRV ( thermic relief valve ) on DIB-1 valves . The Axy valve system consist of two valves : The Axy valve and the service valve . The Axy valve is an on / off valve , and the service valve is a throttling valve . There are several different valve configurations all depending on the installation space available . The valve illustrated in Figure 4 can be as short as 120 mm with both the outlet for the gauge and the service valve on the side of the valve making it easy to install and use .
Cramped places
The Axy valve will never be used to throttle and will be protected against erosion or cavitation . All throttling will be done with the service valve installed to the outlet of the Axy valve Figure 5 . After use , the service valve and the gauge will be taken off the Axy valve and replaced with the blind and the bleed plug . If the service valve starts to leak due to wear on the ball / seats , it will be repaired or replaced with a new valve all without having to shut down . Under normal conditions the Axy valve will be installed without a handle and with a bleed plug in the service port ( 1 / 2 ”) and a blind plug in the gauge port ( as in Figure 4 ). When you need to work with the Axy valve you control that the valve is in the closed position . Open the bleed plug to control that the Axy ball is sealed . Then take out the 1 ⁄ 4 ” blind plug and install the gauge . Take out the bleed plug and install the service valve with bleed to safe location ( as illustrated in Figure 5 ). Now the Axy system is ready to be used . The Axy valve can be specially built to fit into cramped places . The valve in Figure 6 has the outlet and the gauge connection at 90 degrees making it possible to instal the valve directly into the cavity .
Special valve with an installation adapter
The main valve in Figure 7 is a solid slab gate valve with radial seals on the seats . As illustrated , it is no way that a “ normal ” valve could be installed where the lubrication fitting is installed . Téchne designed a special valve with an installation adapter , the adapter as illustrated in Figure 8 is install in the gate valve body . The Axy valve is then installed into the adapter as also illustrated in Figure 8 . The picture in Figure 9 shows the Axy valve installed with only 5 mm distance to the gate valve . This special Axy valve can be installed in four positions with the handle on top or on side as illustrated in Figure 10 . Depending on the purpose of the Axy valve , you can decide where the 1 ⁄ 4 ” gauge connection should be machined . The gauge connection can be machined before the ball , into the cavity of the Axy valve or after the ball . Figures 11 and 12 show two examples of the valve as a telltale ( leak indication ) valve . The valve in Figure 11 has a pressure indicator installed in the gauge hole , and in Figure 12 there is a needle valve installed outside of the gauge hole with a gauge installed to indicate a possible leak . If a leak is detected , sealing component can be injected to seal off the leak .
40 Valve World August 2022 www . valve-world . net