Schubert & Salzer – 8028 GS3 Compact Sliding Gate Control Valve

Overview

The Schubert & Salzer Type 8028 is a pneumatic sliding gate control valve in reinforced GS3 design, featuring an integrated positioner with a mounted diaphragm actuator for compact process plant installations. Characterized by high control precision and a long service life, the Type 8028 is ideal for demanding modulating control applications where installation space is limited. Available in sizes 1/2″ to 6″ with stainless steel (CF8M body / 316L cover) or carbon steel (WCB body / 316L cover) body options, the valve is rated to 145/580 psi and ANSI #150 and #300.

Media temperatures range from -76°F to 662°F with special versions available on request. Connection options include wafer-type and threaded. The Type 8049 digital positioner is the standard integrated positioner configuration, and metal bellows, limit switch, position feedback, and pilot valve accessories are available. TA-Luft / ISO 15848-1 fugitive emissions compliance is a standard approval.

Features & Benefits

• Reinforced GS3 design with integrated positioner and mounted diaphragm actuator — optimized for compact process plant installations
• High control precision and long service life in demanding modulating control applications
• Type 8049 digital positioner standard (2-wire, 4-wire, Ex-proof, IO-Link, integrated process controller IPC) for advanced digital control and diagnostics
• Dual body material options: stainless steel CF8M / 316L cover for aggressive media; carbon steel WCB / 316L cover for general industrial service
• Available in sizes 1/2″ to 6″ with wafer-type and threaded connection options
• Rated to 145/580 psi and ANSI #150 and #300 with media temperatures from -76°F to 662°F
• Special versions available on request for extended temperature or other application requirements
• Metal bellows accessory available for zero-emission stem sealing
• TA-Luft / ISO 15848-1 fugitive emissions compliance — standard approval
• Optional ATEX non-electrical approval (II 2G Ex h IIC T6…T1 X Gb; II 2D Ex h IIIC 85°C…530°C X Db) for hazardous area installations
• EC and UKCA Declarations of Conformity available

Technical Specifications

• Size: 1/2″ – 6″
• Pressure: 145/580 psi; ANSI #150; ANSI #300
• Body material: Stainless steel CF8M with 316L cover; Carbon steel WCB with 316L cover
• Media temperature: -76°F to 662°F (special versions available on request)
• Actuator: Integrated positioner with mounted diaphragm actuator (reinforced GS3 design)
• Connection: Wafer type; Threaded
• Media compatibility: Steam, liquids, gases
• ATEX (optional): II 2G Ex h IIC T6…T1 X Gb; II 2D Ex h IIIC 85°C…530°C X Db
• Approvals & Certificates: TA-Luft / ISO 15848-1, EC Declaration of Conformity, UKCA Declaration of Conformity

Applications

• High-precision modulating control of steam, liquids, and gases in compact process plant installations
• Applications requiring reinforced GS3 sliding gate design with long service life
• Process technology installations where space constraints demand a compact integrated positioner valve
• Aggressive media control requiring stainless steel CF8M construction
• General industrial service in carbon steel WCB piping systems
• Low-emission process plants requiring TA-Luft / ISO 15848-1 fugitive emissions compliance
• Zero-emission applications requiring metal bellows stem sealing
• Hazardous area control installations requiring ATEX non-electrical or Ex-proof positioner

Type 8028 GS3 Accessories

Positioners

• Type 8049 Digital Positioner – Digital positioner for the Type 8028 GS3 in 2-wire and 4-wire configurations. Available variants include Ex-proof explosion-proof, IO-Link, and integrated process controller (IPC) versions.

Additional Accessories

• Metal Bellows – Metal bellows stem seal for zero-emission applications requiring enhanced fugitive emissions control.
• Limit Switch – Position feedback accessory providing open/close status signal for process monitoring and control integration.
• Position Feedback – Analog or digital position feedback device for continuous valve position monitoring.
• Pilot Valve – Solenoid pilot valve for pneumatic actuation control of the Type 8028 GS3.

Documentation