strahman sanitary ball valve

Strahman has designed a unique high performance sanitary ball valve. The sanitary valve has a trunnion-mounted design to handle high pressures. Ball and seats can have special selected surface coatings. This combination makes it suitable for heavy-duty service. The bottom entry design option allows very quick and easy exchange of the sanitary valve, without removing the actuation. These sanitary valves are available with both full and reduced bore. Possible applications can be found in the polymer, power and mining industries.

STANDARD FEATURES FOR SIDE ENTRY & BOTTOM ENTRY DESIGN

1. TrunnionMounted— The ball is trunnion mounted to reduce the operating torque. This trunnion mounted design limits the forces on the seat rings and guarantees a long lifetime in service. It also provides a double block and bleed feature.

2. MetalSeating— The sealing surfaces are chromium carbide coated with our special hardening process. The seat shape has been calculated to minimize the peak effect on the edges. This increases the lifetime of the ball and seat surfaces.

3. FloatingSeats— Allow expansion in temperature and the purge of the body inner seat cavity. The independent seats provide bi-directional tightness in the sanitary valve.

4. ThrustBushing— This thrust ring reduces the friction caused by the pressure applied on the stem area. This feature also reduces the torque required to operate the sanitary valve.

5. Anti-BlowOut— The sanitary valve stem is securely mounted in the sanitary valve, even in case of a packing failure the integral shoulder in the sanitary valve body and the shoulder machined on the stem prevents blow-out of the stem.

6. BidirectionalUpstreamSealing— The two independent, spring-loaded seats prevent line pressure from by-passing the ball. In low pressure situations the springs maintain seating thrust. As line pressure increases, the process pressure pushes the up-stream seat against the ball which increases the sealing force. The bottom vent connection allows purging of the inner seat cavity which makes this design double block and bleed.

7. Standard Full Bore Design

8, 9. MultiSpringLoading— Springs provide flexible and reliable seat loads. Springs (8) are protected from erosion by the seat compression ring. The seats have a groove for easy seat retraction during maintenance (9).

10. Anti-staticDesign— The spring maintains a permanent contact between the ball and the stem. It prevents any accumulation of electric charges on the ball, and therefore any unexpected electric discharge.

11. StemGuideBushing— This bushing is used to take the lateral forces created by actuating the sanitary valve. It prevents any bending or flexing of the stem and guarantees a long lifetime for the packing.

12. SeparateBallandStem— This feature assures proper centering of the ball between the two seats. It prevents differential pressure applied on the ball to be displaced to the seats.

13. Inherently fire safe due to the design and packing/gasket materials

14. Forged body and trim