The Provable Zero-LeakageDouble Block & Bleed, plug valve with retracting seals

The Truseal positive shut-off, double block and bleed valve was developed for multi-products fuel mainfolds. 
Busy manifolds must operate frequently, switching from product to product, often with power actuators and sometimes without human supervision, Valves that can be trusted to seal drop-tight, every time, will avoid the expensive consequences of contaminated fuel. More Info