Si-109 EN
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Datasheet Tank bottom valve Si-109 EN Edition: 2012-07 Type KVBW Wafer design Type KVBF Flanged design Nominal pressure PN 6 Nominal size DN 80-400 Material Stainless steel • Shut-off valve • One-piece shaft gives torque transmission free of backlash • Easy maintenance SOMAS tank bottom valve KVBW / KVBF is a ball segment valve adapted for mounting on the bottom of a tank. An adaptation is made to minimize the volume between the ball segment and the tank floor plane. SOMAS tank bottom valve KVBW is intended for installation between the flange and the tank bottom. KVBF is a flanged valve where one flange is adapted for mounting on the tank bottom. The valve body is made in one piece. The shaft is manufactured in one piece to guarantee a backlash-free transfer of the turning movement. Stuffing box has sealing elements of white PTFE (FDA approved optional). The seat material is PTFE 53 (PTFE reinforced with stainless steel SS2353) optionally the FDA approved Hostaflone®, that is pressed against the ball segment. The ball segment have been modified with a flat backside. Valve gaskets are made from Gylon. (FDA approved material). The valves are in their basic version ATEX approved. Valves that are both FDA and ATEX approved are optional, and must be checked with SOMAS. Patent-pending shaft seal made from FDA approved material is also optional. (ATEX execution requires anti-static washer). Surfaces facing media Polished to Ra0.8 optional. Surfaces facing media Electro polished optional. 2 threaded connections for flushing of valve optional. The valves can be used for shut-off of nearly all types of media. The valves are delivered as tested units ready to use. The valves are tested complete with selected actuators and accessories.

Edition: 2012-07 Si-109 EN Tightness class Pressure and temperature limits The tightness class is related to the chosen material in the seat ring. According to the material in the seat. PTFE 53-seat 1 (Code B) (EN 60534-4 VI (ANSI B16-104 Class VI) Hostaflone® (Code X) (Class VI) 1 50% PTFE + 50% 1.4435 (316L) powder (percentage by weight) Flow characteristics Seat Code B X Max. working pressure1 (bar at ° C) 150° 170° 200° >200° 4,6 4.6 4.5 4,5 4.3 4,3 – 4.5 4,5 4.3 4,3 – – 10 bar = 1 MPa Note 1: Check with SOMAS 1 NB! Do not exceed working pressure for the valve. 100% Flow 0° 90° Opening...

Si-109 EN Edition: 2012-07 Flange standard Further technical information SOMAS tank bottom valve KVBW is intended to be mounted between the tank bottom and the pipe flange. SOMAS tank bottom valve KVBF has a flanged design. The flange facing the tank bottom is modified to be mounted on the tank bottom in agreement with the tank manufacturer. Pipe flange are drilled PN 6. Technical data for the materials used in the SOMAS valves, flange standard, steam data, etc. can be found in section 6 of the SOMAS catalogue. The pressure class of the pipe flanges must be stated when the valve is ordered....

Edition: 2012-07 Si-109 EN Selection table Pneumatic actuators Spring return Spring to close Spring to open KVBW Double acting Manual override Valve Shaft DN dia. 5,5 bar 4 bar 5,5 bar 4 bar 5,5 bar 4 bar Hand lever Gear unit 80 20 A21 A22 A23-SC A23-SC A23-SO A23-SOL HSR020 M10/F07 100 20 A21 A22 A23-SC A23-SC A23-SO A23-SOL HSR020 M10/F07 150 25 A22 A23 A24-SC A24-SC A24-SO A24-SOL – M10/F12 200 30 A31 A24 A33-SC A33-SC A33-SO A33-SOL – M12/F12 250 35 A31 A32 A33-SC A33-SC A33-SO A33-SOL – M12/F12 Pneumatic actuators Spring return Spring to close Spring to open KVBF Double acting Manual...