Schubert & Salzer – 8056 – Low Temperature Sliding Gate Valve
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Overview
The Schubert & Salzer Type 8056 GS3 is a manually operated low temperature sliding gate valve designed for precise control and isolation of neutral and aggressive media in cryogenic service applications. Built in a space-saving wafer-type design, the Type 8056 is rated for fluid temperatures down to -328°F and is available in sizes from 1/2″ to 4″.
The GS3 series utilizes a stainless steel CF8M body with metal bellows stem sealing and a carbon/stainless steel disc pair, delivering tight shutoff (IEC 60534-4 Class IV-S1) and high Cv values across all sizes. The valve meets TA-Luft 2021 and ISO 15848-1 fugitive emission requirements and is available with optional ATEX non-electrical certification.
Features & Benefits
- Cryogenic service rated to -328°F — suitable for liquid nitrogen, LNG, and other low temperature media
- Space-saving wafer-type (flangeless) body design — minimizes installation footprint and system weight
- Metal bellows stem sealing with PTFE backup packing — provides reliable, low-emission shutoff per TA-Luft 2021 and ISO 15848-1
- High Cv values across all sizes — supports efficient flow with minimal pressure drop
- Tight shutoff per IEC 60534-4 Class IV-S1 — leakage less than 0.0001% of Kvs for carbon/stainless steel disc pair
- Compatible with ANSI 150, ANSI 300, PN40, and JIS flange standards — broad installation flexibility
- Optional ATEX non-electrical certification (II 2G, II 2D) — suitable for use in hazardous area classifications
- Quiet, precise manual hand control — provides reliable throttling and isolation without actuator
- Stainless steel CF8M body and 316 Ti internal trim — corrosion resistant for aggressive media service
Technical Specifications
- Series: GS3
- Nominal Sizes: 1/2″ – 4″
- Body Material: Stainless steel CF8M
- Body Cover: Stainless steel 316 Ti or 316 L
- Actuating Stem: Stainless steel 316 Ti, roller burnished
- Bellows: Stainless steel 316 Ti or Inconel 625
- Fixed Disc: Stainless steel 316 Ti, coated
- Sliding Disc: Special carbon material
- Packing: PTFE (carbon filled), spring SST 301
- Body Design: Wafer type (self-aligning) for flanges per ASME B16.5 RF or DIN EN 1092-1 Form B
- Pressure Rating: ANSI 150 – 276 psi; ANSI 300 / PN40 – 580 psi (stainless steel)
- Maximum Differential Pressure (standard bellows): 479 psi across all sizes
- Maximum Differential Pressure (PN100 bellows): 719 psi across all sizes
- Fluid Temperature: Down to -328°F
- Ambient Temperature: -22°F to +212°F
- Leakage Class: IEC 60534-4 IV-S1 / EN 12266-1 E (<0.0001% of Kvs)
- Fugitive Emission Standard: ISO 15848-1 / TA-Luft 2021
- ATEX Marking (optional): II 2G Ex h IIC T6…T1 X Gb / II 2D Ex h IIIC 85°C…530°C X Db
- Approvals & Declarations: TA-Luft / ISO 15848-1, EU Declaration of Conformity, UKCA Declaration of Conformity
- Flange Gaskets (customer side): ANSI B16.21 or DIN EN 1514-1
Applications
- Cryogenic fluid control and isolation (liquid nitrogen, LNG, LOX)
- Low temperature industrial process control
- Control and shutoff of neutral and aggressive liquid and gaseous media
- Chemical and petrochemical low temperature service
- Hazardous area installations requiring ATEX non-electrical classification
- Applications requiring fugitive emission compliance (TA-Luft, ISO 15848-1)
- Energy and gas processing industry
Type 8056 Accessories
- Limit Switch – Optional limit switch for valve position feedback; contact factory for available configurations
