Based in Vlotho-Exter, their expert team develops and produces over 1,000 variations of solenoid and compressed-air controlled valves. These "Made in Germany" solutions are engineered to meet the rigorous demands of specialized industries, including hydrogen plants, space technology, shipbuilding, and food processing, ensuring reliability where it matters most. Renowned for uncompromising German engineering, GSR excels in providing custom fluid control solutions for the most demanding environments, including ultra-high pressure, high temperature, and cryogenic applications. As a proud subsidiary of Indus Holding AG, GSR combines the economic strength of a major corporation with the personalized service of a medium-sized specialist. Beyond their extensive standard range, they excel in developing bespoke valve solutions tailored to specific customer requirements. All products are DIN EN ISO 9001 certified and carry prestigious global approvals such as ATEX, UL, and DVGW, reflecting a deep commitment to sustainable innovation and technical excellence.

With a temperature range extending down to -196°C, it is used in liquid nitrogen handling, liquefied gas storage, and industrial gas plants. The PTFE sealing provides chemical inertness at low temperatures, while the wide port range from ¼" to 2" and orifice sizes up to 50 mm allow it to be specified across a broad range of flow requirements. 

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Available in brass and stainless steel construction with NBR, FKM, and EPDM seal options, it serves clean liquid and gas media across water treatment, mixing plants, and bottling plants applications. Its wide port and orifice range (13.5 -- 80 mm) makes it one of the highest flow-capacity models in GSR's 2/2-way range, suited to main line and large flow control installations.

This makes it suitable for both sub-zero media such as refrigerants and high-temperature applications including steam and thermal fluids. Available across ½" to 3" pipe connections with orifice sizes up to 76 mm, the TYPE 63 handles significant flow volumes. Red brass and stainless steel body options combined with NBR, FKM, EPDM, and PTFE sealing provide comprehensive media compatibility.

With pipe sizes from ½" to 2" and large orifices of 18–50mm, it is applied in high-pressure directional control circuits, pressure switching applications, and process media selection systems. PCTFE sealing provides excellent performance in chemically aggressive and low-temperature service. Red brass and stainless steel body options accommodate diverse installation environments.

Available across ¼" to 2" port sizes with an orifice range of 6–40mm, it covers applications from pilot circuits to medium-flow directional control. Brass and stainless steel bodies are paired with NBR, FKM, EPDM, and PTFE sealing to accommodate varied media. The 20 bar pressure rating and -30°C to +80°C temperature range suit most industrial utility, venting and vacuum technologies.

Available with ¼" to 2" ports and orifice sizes of 13.5–50 mm, it serves industrial gas plants, liquefied gas storage terminals, and aerospace propulsion test facilities. PTFE sealing and optional stainless steel body provide the cold-temperature stability and chemical inertness required for cryogenic service. Pressure capability extends to 16 bar.

The stainless steel body and PEEK sealing material provide the structural rigidity and chemical resistance needed at these conditions. Port sizes from ⅛" to ½" reflect the compact design necessary for integration into high-pressure test systems and hydraulic logic circuits. Universal operation enables the valve to be configured as NC, NO, or diverter for maximum installation flexibility.

With brass and stainless steel body options and NBR, FKM, EPDM sealing, it is the practical choice for bottling plants, boiler constructions and liquified gas plants, hot water application and neutral chemical circuits. Operating at up to 16 bar and within -10°C to +80°C, the TYPE 43 covers the standard industrial service envelope effectively and cost-efficiently.

At these dimensions, it serves industrial water main control, large-scale tank systems and pipe construction in water supply and pump technology and other general mechanical and apparatus engineering. Rated to 40 bar and with temperature capability from -30°C to +80°C, the TYPE 24 is engineered for main supply and plant entry isolation duties. Its broad selection of seal materials — NBR, FKM, EPDM, and PTFE — accommodates a range of process fluids.

This extraordinary thermal range makes it suited to superheated steam, high-temperature thermal oil circuits, and industrial furnace gas control where polymer seals would degrade. Available in brass and stainless steel across ¼" to 2" port sizes with orifice diameters of 13–50 mm, this valve addresses applications where virtually all elastomeric alternatives fail due to thermal decomposition.

With the same ½" to 3" port sizing and an orifice range of 12–16 mm, this model addresses applications where redundant actuation or reduced thermal loading at the coil is required. Red brass and stainless steel body options, combined with PEEK sealing, maintain full media compatibility across the -40°C to +200°C operational range. Pressure rating reaches 40 bar.

It serves hydrogen tanks, the paper processing industry for press beams, pressure intensifier systems, and high-pressure gas filling stations. Despite its ¼" port restriction, the small orifice (0.5–5 mm) allows fine control of high-pressure fluids at extreme working pressures. Available in brass and stainless steel with NBR, FKM, and EPDM sealing, it maintains structural integrity under conditions that would compromise standard valve bodies.

This normally closed valve is designed for extreme-duty hydraulic test systems, high-pressure gas cylinder filling equipment, sheet greasing, and metal forming high-pressure applications. PEEK and metallic sealing options provide the structural performance needed at this pressure level. Small orifice sizes from 1–8 mm in a stainless steel body ensure precise control with maximum pressure containment.

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Available with ¼" to 2" ports and 12– 50 mm orifice diameters in stainless steel construction with PTFE and PEEK sealing, it targets high pressure pumps, paper processing industry, press and lock control, water and oil hydraulics, and industrial test bench applications. The relatively compact form factor compared to conventional high-pressure valves makes it suitable for space-constrained panel installations.

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Operating on 12–24V DC with an M12 connector interface, it provides a digital output signal equivalent to the supply voltage, enabling straightforward integration with PLCs and SCADA systems. The G 1/8 thread connection allows direct mounting to GSR valve bodies, and the stainless steel housing ensures durability in harsh industrial environments from -40°C to +80°C.

With 99% repeatability and a resolution better than 0.5%, it enables precise, continuously variable pneumatic actuation for process control and positioning applications. Rated to IP65, it withstands industrial environments where dust and moisture ingress are present. Compatible with compressed air to ISO 8573-1 Class 3, it serves pneumatic pressure control loops, proportional actuator control, and precision dispensing systems.