Gate valves are bi-directional valves ideally suited for on-off duties OMB produces various types, with parallel face gates or wedge gates (as closure elements. These valves have a high flow coefficient (Cv), and in the case of parallelgatevalves, it is comparable with the straight pipe’s Cv. They are usually installed in high pressure fluids applications because the upstream pressure helps the sealing between gate and seat. OMB is continuously studying and improving the surface finish of the seating in order to guarantee the minimum wear under high pressure conditions. Gate valves are supplied in various models that cover a wide range of different and unique services.