PPS Gate Valve

Main steam and main feedwater isolation

Isolation valve, actuated by the medium in the system, using pressurizing principle. Block- design with direct mounted pilot valves.

Used for main steam isolation valve in BWR and PWR reactors and as a main feed-water isolation valve.

Size up to 29.9” (760mm).
Class up to 2500.
Forged/cast carbon or stainless steel.
QME-1 qualified for steam. Variety of different qualification programs for water and two phase flows.

Stable performance and very high tightness classes.
Stable operations under all specified conditions (steam, water & transitions).
Opening & closing with auxiliary medium possible if no power.
The closing characteristic that ensures very low loading of the piping system.
Very low pressure losses, hence contributes to high efficiency of the power plant.
The simplest and most reliable controlling system on the market.
High variety of redundancy levels.
Retracting discs (no contact between the disc and the seat, during the stroke.
No stuffing box.