![elbii.png](https://static.wixstatic.com/media/74c4f9_0ff46739ac32401e8f041e0debb8a1a7~mv2.png/v1/fill/w_380,h_105,al_c,q_85,usm_0.66_1.00_0.01,enc_auto/elbii.png)
These valves are used on the discharge side of a centrifugal pump in a hydronic heating or cooling system and act as a shut off valve, a spring loaded silent check valve, and balancing valve. They are made from cast iron castings and machined to exact requirements along with drilled flanges in the bodies. A center soft seal disc assures no leakage and the rising stem configuration comes with an adjustable position indicator for accurate disc positioning for throttling service. The inlet, outlet includes a standard gauge tap and an NPT drain plug. There is both silence and automatic operation and discs will open when line pressure reaches ¼ PSI. To stop flow reversal and water hammer, a spring will close the disco as the line pressure gets closer to zero. The acme rising stem allows for the valve flow to be adjusted.
​
​
![Screenshot_30.png](https://static.wixstatic.com/media/74c4f9_47204eff7ded4befbaf52e6ad8e62dc6~mv2.png/v1/fill/w_498,h_568,al_c,q_85,usm_0.66_1.00_0.01,enc_auto/Screenshot_30.png)
![ASME 200 PSI Domestic Booster Tanks.jpg](https://static.wixstatic.com/media/74c4f9_82d32a68df0740c5aea15d058a056da0~mv2.jpg/v1/crop/x_0,y_0,w_800,h_848/fill/w_411,h_436,al_c,q_80,usm_0.66_1.00_0.01,enc_auto/ASME%20200%20PSI%20Domestic%20Booster%20Tanks.jpg)