By notcpah|2016-10-07T04:42:58+00:00October 7, 2016|Projects|Comments Off on The ball joints at concentrating solar plants (solar trough system) are at risk of leaking HTF (dowtherm), causing unmonitored emissions. You can replace leaky, high-maintenance ball joints with specially designed expansion joints. In this instance we can replace 3 ball joints with just 1 expansion joint.