Schubert & Salzer – Type 7079 Pinch Control Valve

Overview

The Schubert & Salzer Type 7079 is a pneumatic pinch control valve with an integrated positioner, designed for demanding flow control applications involving contaminated, granulated, viscous, doughy, or aggressive media. Its elastomeric tube design keeps all wetted components in stainless steel 316L, while the non-wetted body is constructed of stainless steel CF8M.

Available in sizes from 1/2″ to 2″, the Type 7079 supports a range of positioner options — pneumatic, electro-pneumatic, and digital — and accommodates sanitary and aseptic applications with tube materials compliant with FDA and USP Class VI guidelines.

Features & Benefits

• Integrated positioner (pneumatic, electro-pneumatic, or digital Type 8049) for compact, single-unit installation
• Rotatable actuator design for flexible installation orientations
• All components in contact with fluid constructed of stainless steel 316L for superior corrosion resistance
• Non-wetted body in stainless steel CF8M — no process media contact with the valve body
• Suitable for sanitary and aseptic applications — hygienic sealing design
• Compatible with FDA-approved tube materials (EPDM, NBR) for food, beverage, and pharmaceutical service
• Handles liquids, gases, suspensions, granulates, and slurries without degradation of control performance
• Revised inner tube design for improved performance in demanding applications

Technical Specifications

• Nominal sizes: 1/2″ to 2″
• Maximum operating pressure: 87 psi
• Minimum working pressure: 8 psi
• Body material: Stainless steel CF8M (non-wetted)
• Wetted material: Stainless steel 316L (except PVC cement socket connection)
• Tube material options: EPDM (FDA), NBR (FDA), FKM (Viton), SBR
• Fluid temperature — NBR (FDA): 14°F to 176°F (short-duration steam to 266°F)
• Fluid temperature — FKM: 14°F to 266°F
• Fluid temperature — EPDM (FDA): 14°F to 203°F (short-duration steam to 266°F)
• Ambient temperature — digital positioner: +14°F to +167°F
• Ambient temperature — analog positioner: +5°F to +140°F
• Actuator sizes: 3″ piston, 5″ piston (size and tube-material dependent)
• Pilot pressure: 44–87 psi (actuator and size dependent)
• Approvals: CRN Certificate
• Tube material approvals: EPDM and NBR — FDA, BfR; EPDM — EG 1935/2004/CE, EN ISO 3861

Applications

• Abrasive and slurry media: mining, minerals processing, water treatment
• Viscous and doughy media: food processing, adhesives, pastes
• Sanitary and aseptic service: food & beverage, pharmaceutical, cosmetics
• Granular and powder media: plastics, rubber, building materials
• Aggressive chemical service: acids, alkalis, bleach liquors, chlorine solutions
• Wastewater and sludge handling
• Pulp & paper process streams
• Textile industry fluid control

Type 7079 Accessories

• Limit Switch – End-position feedback for open/closed status indication
• Position Feedback – Continuous valve position output signal
• Pilot Valve DN2, 230 VAC – Solenoid pilot valve for pneumatic actuation control (230 VAC)
• Pilot Valve DN2, 24 VDC – Solenoid pilot valve for pneumatic actuation control (24 VDC)

Documentation