Schubert & Salzer – 8053 – High Temperature Sliding Gate Valve

Overview

The Schubert & Salzer Type 8053 is a manually operated high temperature sliding gate valve designed for regulating or shutting off liquid and gaseous media in demanding industrial applications. Available in the GS3 series, it operates across a wide temperature range — from -76°F up to +986°F — making it suitable for both neutral and aggressive process media where extreme thermal conditions are present.

Built in a compact wafer-type design, the Type 8053 installs between flanges per ASME B16.5 or DIN EN 1092-1 standards without the need for a dedicated valve body face length. Its sliding gate mechanism delivers precise manual control with low actuation force, high Cv-values, and tight shutoff performance across multiple pressure classes including ANSI 150, 300, and 600.

Features & Benefits

• Space-saving wafer-type (flangeless) body design minimizes installation footprint and valve weight
• Rated for media temperatures from -76°F up to +986°F (stainless steel body with Inconel 625 bellows and STN2 sliding unit)
• Low actuation force enables precise manual control even at high differential pressures
• High Cv-values support efficient flow control across a wide range of pipe sizes (1/2″ to 10″)
• Multiple sliding disc options — carbon/SFC, STN2, and STN3 — allow configuration for specific temperature and media requirements
• ATEX non-electrical certification available for use in hazardous area classifications II 2G and II 2D
• Compliant with TA-Luft 2021 and ISO 15848-1 for fugitive emissions control
• Quiet operation with tight shutoff — leakage classification up to IV-S1 per IEC 60534-4
• Optional metal bellows stem sealing for additional leak protection
• Self-aligning wafer body fits ANSI B16.21 and DIN EN 1514-1 gaskets in the applicable pressure rating

Technical Specifications

• Valve series: GS3
• Nominal sizes: 1/2″ – 10″
• Body design: Wafer type (flangeless), self-aligning for ASME B16.5 RF or DIN EN 1092-1 Form B flanges
• Pressure ratings: ANSI 150 (1/2″–10″), ANSI 300 (1/2″–6″), ANSI 600 (1/2″–3″); DIN PN40 and PN100 also available
• Media temperature range: -76°F to +842°F (carbon-stainless steel body or STN2 unit); up to +986°F with full stainless steel body, Inconel 625 bellows, and STN2 sliding unit
• Ambient temperature: -22°F to +212°F
• Body materials: Stainless steel CF8M body / 316L body cover; or carbon steel WCB body / 316L body cover
• Actuating stem: Stainless steel 316 Ti, roller burnished
• Bellows: Stainless steel 316 Ti or Inconel 625
• Sliding disc options: Carbon/SFC material, STN2, or STN3
• Packing: PTFE (carbon filled), self-adjusting; spring stainless steel 301
• Leakage class (disc pair, carbon/SFC): <0.0001% of Kvs; IEC 60534-4 Class IV-S1; EN 12266-1 Class E
• Leakage class (disc pair, SFC): <0.0005% of Kvs; IEC 60534-4 Class IV-S1; EN 12266-1 Class F
• Leakage class (disc pair, STN2): <0.001% of Kvs; IEC 60534-4 Class IV; EN 12266-1 Class F
• Shaft/body sealing: ISO 15848-1 rated; spec FE-BH-CC3-SSA0-t(-40°C/+350°C)-PN40
• ATEX (non-electrical): II 2G Ex h IIC T6…T1 X Gb / II 2D Ex h IIIC 85°C…530°C X Db (optional)
• Approvals & declarations: TA-Luft 2021, ISO 15848-1, EU Declaration of Conformity, UKCA Declaration of Conformity
• Flow characteristic: Linear or equal percentage; multiple Cv reduction options available (100% down to 0.4%)

Applications

• High temperature steam and heat transfer media systems
• Chemical processing with aggressive or corrosive media
• Metallurgical and foundry processes requiring extreme temperature handling
• Tire, rubber, and plastics manufacturing where thermal process control is critical
• Textile industry steam and thermal fluid regulation
• Energy generation and industrial boiler systems
• Building materials and glass manufacturing processes
• Hazardous area installations requiring ATEX-rated non-electrical actuation
• Applications subject to TA-Luft or ISO 15848-1 fugitive emissions requirements

Type 8053 Accessories

• Metal Bellows – Optional additional stem bellows seal (316 Ti or Inconel 625) for enhanced fugitive emissions containment at elevated temperatures
• Limit Switch – Optional position feedback accessory for open/closed status indication
• ATEX Non-Electrical Marking Kit – Factory-configured option for hazardous area classification; II 2G/II 2D rated

Documentation