Catalogue 6 - STAUFF Valves

www.stauff.com/6/en/#111 E 111 STAUFF ball valves of the BBV series have been tested successfully according to British Standard BS 6755 T.2, API 6 FA and ISO 10497. The tests were testified by the German TÜV Inspectorate. At this time, certification as "fire-safe" relates to our BBV series with threaded connections and nominal sizes from DN 25 to DN 50 and the BBV series with flange connections and nominal sizes from DN 25 to DN 125 and within a nominal pressure range from 260 ... 420 bar / 3700 PSI ... PN 6000 PSI. The material utilized for the soft seals in "fire-safe" valves remains dependant upon the required chemical resistance to suit the fluid, the application and operation conditions. A wide variety of ball valve terminations are available from STAUFF to suit the individual applications or requirements and additionally other characteristics such as antistatic design can be incorporated within the STAUFF product. When handling flammable liquids safety must be a prime consideration. Great importance is therefore attributed to the design of "fire-safe" shut-off valves utilized in many industrial environments including: This is most important for: Chemical Plants Petrochemical Plants Oil Drilling On-Shore and Off-Shore Installations Oil Refineries When fire does break out, it is important that it does not spread through failures in pipe-work systems. Even under the most extreme conditions shut-off valves must provide: Secure Operation Reliable Sealing in shut-off position Reliable Sealing to the outside Ball Valves with Fire-Safe Approval Due to their quarter turn shut-off design, STAUFF ball valves provide a solution to meet these demands. Metal seat edges at the ball seats guarantee the sealing function during and after contact with fire, even if the seals themselves are burnt. In addition both housings and shafts are also sealed with heat resistant seats ensuring their continued operation. The "fire-safe" test undergone by STAUFF ball valves subjected them to flames and a resulting temperature of +760 °C / +1400 °F where the ball valve is heated to a general temperature of min. +650 °C / +1202 °F. The STAUFF "fire-safe" design ensured that after this burn period of 30 min. the valves remained operable and that a continued “emergency” sealing of the valve could be guaranteed. The test conditions under which "fire-safe" requirements are specified are characterised in various international standards. Catalogue 6 § Edition 06/2023 Special Application Valves Ball Valves For Steel Mill Applications System Service Bleed Valve Safe depressurization is a critical step in the maintenance of a hydraulic system. In many countries maintenance personnel are required to lock-out and tag hydraulic circuits before any maintenance work is carried out. Assure that this process is carried out safely and properly during routine machine maintenance using the STAUFF System Service Bleed Valve. The valve can only be locked and tagged-out in the closed position after the integrated bleed valve has been operated and the affected portion of the hydraulic system has been depressurized. The interlocking cam plates ensure the correct operating sequence. Pressure Equalizing Ball Valve Large, high pressure ball valves are difficult to open under pressure, especially when closed for a long period of time. Solutions to this problem have included multiple valves with bulky, external plumbing. The STAUFF Pressure Equalizing Ball Valve adds an integrated valve mounted directly to the valve body and connected internally with no extra fittings or pipework. Once the lockable bypass valve is opened pressure on both the upstream and downstream side of the main ball valve is equalized. This can reduce the torque required to operate the valve by up to 70%. This also reduces the potential for damage to the valve caused by excessive breakaway torque.