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Клапаны ARCA с двойным седлом универсальны и могут применяться в различных сферах. За многие годы использования они доказали свою надежность при работе на электростанциях, корабельных установках, сталелитейных заводах и в управлении производственными процессами.

Двухседельные клапаны классической конструкции почти полностью разгружены. Небольшое усилие и малый ход позволяют использовать небольшие по размеру дешевые приводы.

Блочная система клапанов ARCA позволяет сочетать клапаны с мембранными, поршневыми, гидравлическими или электрическими приводами.

Все клапаны с двойным седлом имеют корпус с четырьмя фланцами. Двойная направляющая вала гарантирует высокую надежность, даже при работе в сложных условиях.

Описание технологий

Three-way control valves

The ARCA three-way control valve is designed to be used as a three-way or mixing valve, depending on the applica-tion. As a three-way valve, the incoming medium is split into two individual flows. This split can be 1:1 or a different ratio can be used. As a mixing valve, two media are mixed in the valve housing and exit the three-way valve in the desired new state.

Double-seat control valves

The ARCA double-seat control valve is characterized by its simple and robust design, featuring a double guided trim, and is used for larger volumetric flows. The flow is con-trolled at two ports, whereby both plug diameters are coordinated such that the medium exerts an opening force on the one plug and a closing force on the other and the actuating forces almost compensate each other out as a result. The plugs can take a variety of shapes to meet appli-cation requirements.

Angle valves

The ARCA angle valve is used in very specific plant appli cations. The ARCA modular parts system therefore integrates housings made from different cast and forged materials so that a wide variety of requirements can be met. The internals, however, always follow the same basic clamped principle of the ECOTROL® series. The process fluid flows into the angle-control valve from the side or the bottom and exits after just one deflection.

Forged valves

ARCA forged valves are made from a forged block or a dye-forged housing. Defining characteristics is the large selection of housing materials and the resulting increase in structural safety. Forged control valves are especially used in conjunction with welded ends, since they can be con-nected directly to the piping here. The internals also follow the basic clamped principle of the ECOTROL® series.

Double seat with parabolic plug
This double-seat control valve divides and controls the process fluid using two parabolic plugs. The proven double-guided parabolic plug design is frequently used for applica-tions involving water and impresses with its robust and simple construction. The exterior dimensions of the parabolic plugs are virtu- ally identical by design, making them almost pressure equalized. The full cone diameter does not need to be considered in dimen-sioning the actuating force, but only the resulting ring gap, allowing use of smaller actuators.
Double seat with perforated plug
As with all ARCA series, the modular double-seat control valve is available in many ver-sions, meets nominal pressure requirements up to a nominal pressure of 160 bar (PN 160), and is compatible with temperatures to 530 °C. This valve is a high-pressure double-seat control valve that has cooling fins in the bonnet so that the stuffing box remains out-side the hot area. Fluid control takes place via perforated plugs, which are used in place of traditional parabolic plugs to reduce noise.
Small actuators are also specified for this model so that high differential pressures can be regulated.
Graduated double seat
The ARCA modular parts system facilitates a multi-stage pressure drop to accommodate higher differential pressures and applications for which the purity of the medium cannot always be ensured. This version allows you to depressurize the medium without cavita-tion, for example. The design of the double-seat control valve eliminates the need for a pressure-relief facility and shall be preferred if the process fluid is slightly contaminated.
Small actuators are of course used for the double-seat control valves.

Характеристики и спецификации

Design Three-way Double-seat Forged Angular
Type 200 220 250 280 180 350 380
DN (housing) 25-600    25-300 50-350 40-250 15-100    150-1200 15-300 25-400
PN 10-40    63-160 10-40 63-160 10-250    10-40 10-250 10-400
Housing type/design Three-way Straight-way Straight-way Angle
Housing material Cast Cast Forged Cast Forged
EN for temperatures ASTM for temperatures
Housing – cast 1.0619 GP240GH up to 450°C A 216 WCB up to 450°C
1.7357 G17CrMo5-5 up to 530°C A 217 WC6 up to 530°C
1.4581 GX5CrNiMoNb19-11-2 up to 550°C
1.7379 G17CrMo9-10 up to 580°C
1.4931 GX23CrMoV12-1 up to 600°C
2.1050 G CuSn10 -196 up to 300°C
Housing – forged 1.0460 P250GH up to 450°C A 105 up to 450°C
1.0425 P256GH up to 450°C
1.5415 16Mo3 up to 530°C
1.7335 13CrMo4-5 up to 570°C A 182 F12 Cl.2 up to 570°C
1.7383 11CrMo9-10 up to 600°C A 182 F22 Cl.3 up to 600°C
1.4903 X10CrMoVNb91 up to 620°C A 182F91 – P91 up to 620°C
Valve trims 1.4021 X20Cr13
1.4122 X39CrMo17-1
1.4571 X6CrNiMoTi17122
1.4922 X20CrMoV1 21
2.0966 / 2.0550
Bonnet Standard
With cooling fins
Self-sealing pinch cap
With stuffing box control/sealing fluid connection
With bellows

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