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Turbine diaphragms

Our core product is diaphragms. Since 2005, we have produced over 500 new diaphragms. Years of experience, qualified staff, and significant technical potential allow us to take an innovative approach to producing this component.

Spacer band diaphragms

Spacer band diaphragms are mainly found in steam turbine constructions, in the HP (high-pressure) and the IP (intermediate-pressure) modules. They consist of an outer ring, an inner ring, and a blade palisade. The palisade is composed of blades whose position is determined by the inner and outer shrouds. We stand out from other manufacturers with the technology of making blade holes in the shrouds. The holes are cut in the rolled shroud using water cutting method. This ensures the proper geometry of the holes and perfect fitting to the steering blades.

We manufacture diaphragms of this type up to a diameter of 2500mm.

Typically, the blades and shrouds are made of high-alloy steel (e.g., X22CrMoV12-1, X20Cr13, X11CrMo12-1). The inner and outer rings are made of high-alloy steel for the HP module and a combination of high-alloy and low-alloy steel for the IP module (e.g., X22CrMoV12-1, 14MoV6-3, 13CrMo4-5).

All main components of the spacer band diaphragms are connected by welding. To ensure high-quality connections, we weld the palisade using the TIG method. The main welds between the rings and the palisade are made using the SAW, MAG, and MMA methods, depending on the customer’s requirements.

Board of directors

Chief Executive Officer: Paweł Makowski
Vice-President / Chief Financial Officer Jarosław Kaźmierczyk
Vice-President / Chief Operating Officer: Daniel Deorocki


Metal Expert Sp. z o.o.
00-195 Warsaw,
Słomińskiego Str., 5/231

Office in Elblag – Kwiatkowskiego

Metal Expert Sp. z o.o
Main plant in Elblag
82-300 Elbląg, Kwiatkowskiego Str., 14

Office in Elblag – Stoczniowa

Metal Expert Sp. z o.o.
82-300 Elbląg, Stoczniowa Str., 2
tel. +48 55 239 14 01

Metal Expert