Schubert & Salzer – 8035 GS3 Sliding Gate Motor Valve – Fail-Safe

Overview

The Schubert & Salzer Type 8035 GS3 is a motorized sliding gate control valve with third-party electric actuator featuring a mechanical spring return fail-safe. Ideal where fail-safe mechanical return is contained within the specification, the Type 8035 provides a defined valve position on power loss without relying on stored energy or electronic controls. Available in sizes 1/2″ to 10″ with stainless steel (CF8M / 316L cover) or carbon steel (WCB / 316L cover) body options, the valve is rated to 145/580 psi, 1,450 psi, and ANSI #150, #300, and #600.

Media temperatures range from -76°F to 662°F with special versions available on request. The third-party electric actuator supports control and 3-point configurations with thrust ratings of 1.2 kN and 3 kN and voltage options of 230 V AC, 24 V AC, and 110/120 V AC. Protection class is IP54 as standard with IP65 available optionally. CRN Certificate and TA-Luft / ISO 15848-1 are standard approvals.

Features & Benefits

• Mechanical spring return fail-safe — provides defined valve position on power loss through purely mechanical means, without stored energy or electronic dependencies
• Ideal for applications where mechanical fail-safe is explicitly required in the process or safety specification
• Third-party electric actuator with thrust ratings of 1.2 kN and 3 kN for flexible process load matching
• Voltage options: 230 V AC, 24 V AC, and 110/120 V AC for broad electrical system compatibility
• IP54 protection standard; IP65 available optionally for more demanding environments
• Dual body material options: stainless steel CF8M / 316L cover and carbon steel WCB / 316L cover
• Broad size and pressure range: 1/2″ to 10″, up to 1,450 psi and ANSI #600
• Media temperatures from -76°F to 662°F with special versions available on request
• Wafer-type body for compact installation between standard flanges
• Analog stroke feedback and position electronics accessories available for continuous position monitoring
• TA-Luft / ISO 15848-1 fugitive emissions compliance — standard approval
• CRN Certificate, EC and UKCA Declarations of Conformity available

Technical Specifications

• Size: 1/2″ – 10″
• Pressure: 145/580 psi; 1,450 psi; ANSI #150; ANSI #300; ANSI #600
• 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: Third-party electric motor (control actuator or 3-point actuator) with mechanical spring return
• Actuator thrust: 1.2 kN; 3 kN
• Voltage: 230 V AC; 24 V AC; 110/120 V AC
• Protection class: IP54 (standard); IP65 (optional)
• Connection: Wafer type (installs between flanges)
• Media compatibility: Steam, liquids, gases
• Approvals & Certificates: CRN Certificate, TA-Luft / ISO 15848-1, EC Declaration of Conformity, UKCA Declaration of Conformity

Applications

• Process and safety applications specifying mechanical fail-safe spring return for defined valve position on power loss
• Industrial process control requiring electric actuation with guaranteed mechanical fail-safe without pneumatic infrastructure
• High-pressure modulating control up to 1,450 psi and ANSI #600 with mechanical fail-safe
• Chemical, petrochemical, and industrial plants where mechanical spring return is required over electronic or stored-energy fail-safe alternatives
• Low-emission process plants requiring TA-Luft / ISO 15848-1 fugitive emissions compliance
• Applications requiring CRN certification for Canadian pressure vessel and piping compliance
• Applications requiring continuous analog stroke position monitoring

Type 8035 GS3 Accessories

• Metal Bellows – Metal bellows stem seal for zero-emission applications requiring enhanced fugitive emissions control.
• Position Electronics – Integrated electronics for enhanced position control and signal processing with the Type 8035 GS3 electric actuator.
• Analog Stroke Feedback – Continuous analog position feedback signal for real-time valve stroke monitoring and control system integration.
• Limit Switch – Position feedback accessory providing open/close status signal for process monitoring and control integration.
• Fail-Safe Feature – Mechanical spring return providing defined valve position on power loss; included as standard on all Type 8035 GS3 actuator configurations.

Documentation