ARCA Regler completes the product range of control and shut-off valves for the steam turbine periphery and other applications with the new 190 series. Especially designed to meet high pressure and extreme temperature demands.
Due to the rapidly increasing technology requirements especially in power plants with higher steam or condensate temperatures as well as an increasing number of regular temperature changes, valves in such service normally suffer high stress. Inappropriate design or incorrect material selection, especially on casting components, could lead to early failure of the valves with impact to the productivity of the whole plant.
For this reason, when designing the new 190 series, the pressure containing parts (valve housing and bonnet) have been selected to be dye-forged parts. This manufacturing process guarantees a very homogeneous material structure without any discontinuities. Such microscopic defects, which are very difficult to prevent and to evaluate especially on cast materials, may lead to incipient cracks under hard mechanical or thermal alternating load and with this to early failure of the valve.
Additionally, most advanced CDF-technology was used to optimize the design of the valve body to avoid tension peaks resulting from sudden temperature changes.
The valve trims are correlating to the well-proven ECOTROL® – system:
- Easy maintenance by exchangeable, clamped seat ring; means no seat thread requiring special tools.
- Parabolic or perforated plugs in a wide range of rated flow coefficients; with equal-percentage or linear characteristic
- Seat retainer optional in low-noise design
- Metal seated, seat leakage either FIV Class IV or Class V
The valves are delivered with butt weld ends per EN 12627 or ASME B16.25; with the pipe outside diameter from 33,7 mm up to maximum 76,1 mm. Optionally, socket weld end or threaded connections are available.
The 190 series product scope are globe and angle style valves in standard materials as follows:
- 0460 / A105
- 7383 / A182F22 CL.3
- 4903 / A182F91
Each of the materials has double-certification to EN and ANSI Standard, this means that valve housings from stock can be delivered into PED-range (up to PN 400) as well as into ASME/ANSI range (up to Class 2500; optionally available as “special class” valves with extended pressure/temperature range).
With this, a wide application range and a high availability can be guaranteed.