New Control Valves for Minimal Flow Rates and Very High Pressures
The four low flow valve types 7042, 7242, 7342 and 7045 from Schubert & Salzer for minimal flow rates and high pressures (Image source: Schubert & Salzer Control Systems GmbH)
With three new low flow valves, Schubert & Salzer Control Systems has expanded its portfolio for control and shut-off at high pressures and very low flow rates of liquid or gaseous media. Thus, in addition to the pneumatically actuated Type 7042 with integrated positioner, there are now two new variants with an electric actuator – Types 7242 and 7342 – as well as the manually actuated Type 7045. All four low flow valve types are available with threaded connections in accordance with ISO and ANSI, as well as standardised socket weld connections. According to the manufacturer, the socket weld connection offers a compact and leakage-free connection solution for applications with very high pressures.
Regardless of the type of actuator and connection, all Schubert & Salzer low flow valve types feature minimum Kvs values as low as 0.0027 and a nominal pressure of PN320. They are available as standard in nominal sizes from DN 8 to DN 15 and for media temperatures from –60 °C to +210 °C. Special high-temperature versions of the low flow valves can be used at media temperatures of up to +530 °C.
All valve bodies are machined from solid stainless steel 1.4404 and are fitted with metallic sealing, replaceable trim made of hardened stainless steel or tungsten carbide. This is intended to ensure a long service life in high-pressure applications. According to the company, its special high-pressure packing achieves a high level of leak tightness, even at high switching frequencies and in hydrogen applications.
Positioner with IO-Link
The Type 7042 low flow valve is equipped with the integrated digital positioner Type 8049 in a top-mounted installation. Type 8049 is also available in ATEX or FM versions and can be equipped with an IO-Link connection. With an IO-Link positioner, the low flow valve provides condition data. The evaluation enables predictive maintenance planning as well as fault analysis.
Schubert & Salzer Control Systems will be showcasing the new low flow valves at Valve World Expo 2026 from 1st to 3rd December in Düsseldorf, Germany.
