Trunnion Mounted Ball Valves

 

The ball is mounted on trunnions supported in body bearings above and below the ball. Sealing is achieved by spring loaded piston type seats, which shut off flow when the line pressure acts on the upstream seat. This design provides automatic relief of cavity overpressure. The standard design cannot be used for double block and bleed isolation duty, but “twin seal” design available, despite they would seldom be the first choice for such a service.

In this case, automatic cavity relief is forfeited and an external relief valve must be provided if specifically requested.

Valve Specs

Valve Design Side entry, Top entry
Construction Bolted body
Trim Design Trunnion ball
Size 2" - 36"
Pressure Range 150# - 2500#
Design ASME VIII or B 16.34
Bore Full or Reduced

Materials Carbon Steel, Stainless Steel, Duplex, Super Duplex Incoloy, Bronze Titanium Exotic
Material Status Forged or Cast
Seats Soft or Metal
Seals O-Rings or Lip-Seals
Testing API 598 - API 6D
Operator Wrench, Gear, Actuated

All materials are in conformity with NACE MR 01-75

CONTROLFLUID s.r.l.
Via Braia, 55
16019 Ronco Scrivia (GE)
ITALIA (IT)
Tel. +39 010 9642630
Fax +39 010 9642641

Sede principale
Assemblaggio valvole motorizzate, elettriche e pneumatiche, ispezione finale e collaudi NDT

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CONTROLFLUID s.r.l.
Stabilimenti di produzione di valvole a sfera
Via per Gallarate, 50
21010 Besnate (VA)
ITALIA (IT)

CONTROLFLUID s.r.l.
Stabilimento di produzione di Gate, Globe
and Check Valves
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