MANUAL BLEED VALVE (MBV)

Bleed valve for manual operation. The Control Seal DBBV must always be bleeded in close position. The MBV is the most simple bleed system.
independent inspection agency.

THERMAL RELIEF UPSTREAM (TRU)

With this system on the Control Seal DBBV, the thermal relief valve released the overpressure from the body cavity which may be caused by thermal expansion. The system releases from the body cavity to the upstream side of the valve.

MANUAL BLEED & THERMAL RELIEF (MBTR)

As TRU, however with the possibility to check the integrity of the Control Seal DBBV manually.

AUTOMATIC BODY BLEED (ABB)

The Control Seal DBBV automatic body bleed is actuated when the valve is closed. As an option the isolating valve can be provided with 'lock open' to avoid any human error.

MANUAL BLEED GAUGE WITH GAUGE (MBV-G)

A manual bleed valve connected with a gauge, can be provided, when
emission is undesirable. The gauge will indicate the cavity pressure and
the seal tightness. Note: Body pressure can be increased due to thermal effects, which can indicate false leakage.

THERMAL RELIEF UPSTREAM WITH GAUGE (TRU-G)

To avoid body pressure due to thermal expansion, a relief valve with a gauge can be provided. This means no emission to the atmosphere and no sump system is required. Relief always set on 25 psi.