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Schubert & Salzer Control Systems is adding new variants to its low flow valves for demanding high-pressure applications. Thanks to various actuator and connection configurations, solutions can now be offered for a wide range of applications. Versions for use in high-temperature applications up to 530 °C are now also available.

With three new low flow valves, Schubert & Salzer Control Systems has significantly 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. The socket weld connection, in particular, offers a compact, reliable 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 even 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 also ensures long service life and maximum reliability in high-pressure applications. Thanks to its special high-pressure packing, Schubert & Salzer achieves an extremely high level of leak tightness, even at high switching frequencies and in hydrogen applications.

Expandable with smart electronics
A special feature of the Type 7042 low flow valve is the integrated digital positioner Type 8049 in a user-friendly 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 extensive condition data. The evaluation enables predictive maintenance planning as well as fault analysis – process reliability and system reliability are increased.

Schubert & Salzer Control Systems will be showcasing the new low flow valves at Valve World Expo 2026 from 1 to 3 December in Düsseldorf, Germany (booth C65, hall 1). 
 

The sliding gate valves of types 8021, 8024, 8026 and 8621, featuring a 125 cm² pneumatic diaphragm actuator, will be supplied in a new design from October 2026. The new die-cast aluminium actuators are replacing the previous ones in chill casting. The new construction and die-casting-optimised design have no impact on performance, precision, dimensions or handling for the user. 

Schubert & Salzer valves are now also certified in accordance with TSG D7002-2023 and can therefore continue to be used by Chinese plant operators. The associated extensive initial audit was conducted by the China Special Equipment and Inspection Research Institute (CSEI) and was successfully completed. This allows Chinese plant operators and international plant engineering companies with Chinese customers to continue using Schubert & Salzer valves across a wide range of applications. 

Sliding gate valves of Type 8028 are distinguished by impressively compact dimensions and low weight. A new, larger 125 cm² diaphragm actuator now extends the maximum permissible operating pressures while maintaining the same valve height. With an installation height of just 489 mm, a Type 8028 GS1 sliding gate valve in DN100 is 70 mm shorter than the already compact GS valve with a piston actuator.

In terms of control precision, Type 8028 impresses with a rangeability of 80:1. The outstanding control performance of GS valves is primarily due to their excellent response characteristics. Very short response times with maximum resolution are achieved through short strokes, low moving masses and minimal actuator forces. The optionally integrated Type 8049 digital positioner is available as a 2-wire or 4-wire version, with IO-Link interface, and in Ex and FM versions.

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Low flow valves from Schubert & Salzer regulate minimal Kvs values of 0.0027 and high pressures of up to 320 bar. In addition to the pneumatic low flow valve type 7042 with integrated positioner, there is now a manually actuated low flow valve type 7045 as well as two variants with electric actuator – types 7242 and 7342.

Type 7045 - To product & data sheet ›
Type 7242 - To product & data sheet ›
Type 7342 - To product & data sheet ›