On-Off pneumatic shut-off valves series FFF / IVFL / GRS with inclined seat or started flow are devices that are used for the control of fluids during industrial processes.

The valves are designed and manufactured in accordance with the PED 2014/68/EU directive.

The GRS series with started flow, with servo control in AISI304 stainless steel or TECHNOPOLYMER.
It employs the most commonly adopted materials for started flow bodies, gray iron and Spheroidal cast iron (GJL250 and GJS500), carbon steel (WCB/EN 1. 0619) and stainless steel (CF8M/EN1. 4408), the connections are flanged UNI EN PN 16 or PN 40.
The seal on the seat is of the soft or metallic and starred type.
The seal on the stem is ensured by packing glands in PTFE + PTFE/GRAPHITE.
The started flow valves are made with 2- or 3-WAY bodies with square-angled body.