Schubert & Salzer – Type 7077 Pinch Control Valve

Overview

The Schubert & Salzer Type 7077 is a pinch control valve designed for use with endless tubes in sizes 1/8″ through 1/2″. The valve controls flow by pneumatically compressing the tube, creating a constriction that adjusts flow rate without any contact between the valve body and the process media. This no-cavity, no-back-taper design makes the Type 7077 well suited for sterile, hygienic, and chemically aggressive applications where cleanliness cannot be compromised.

The Type 7077 features an integrated digital or analog positioner and allows fast, simple tube changes without removing the valve from the process line. The stainless steel body, broad fluid temperature range, and compatibility with all elastomer tube materials up to Shore 65°A support a wide range of demanding process environments.

Features & Benefits

• Integrated positioner — digital (Type 8049) or pneumatic/electro-pneumatic (Type 8047) options available to suit control requirements
• No fluid contact with valve body — media travels entirely through the tube, eliminating cross-contamination risk
• No cavities or back tapers — design supports hygienic and sterile process requirements
• Fast and simple tube change — tube replacement is performed quickly without removing the valve from line
• Three interchangeable fixing pieces — accommodates tube outer diameters of 3/8″, 1/2″, and 5/8″
• Software-adjustable stroke — eight discrete stroke positions available from 0.16″ to 0.67″ (full stroke)
• Rotatable bonnet — allows positioner orientation to be adjusted for installation flexibility
• Stainless steel 304 body — provides corrosion resistance for aggressive media environments
• Broad fluid temperature range — rated for -22°F to +338°F depending on tube material
• Compatible with all elastomer tube types up to Shore hardness 65°A

Technical Specifications

• Nominal size: 1/8″, 3/8″, 1/2″
• Tube outer diameter (passage): 3/8″ – 5/8″ (three interchangeable fixing pieces)
• Body material: Stainless steel 304
• Working pressure: 0 – 58 psi (depending on tube quality, Shore hardness, and wall thickness)
• Pilot pressure: 44 – 87 psi
• Pilot connection thread: G 1/8″ (NPT 1/8″ on US version)
• Actuator: Pneumatic, piston 3″ (NPT)
• Full stroke adjustment: 0.67″ (standard); software-adjustable to 0.16″, 0.20″, 0.24″, 0.28″, 0.35″, 0.43″, 0.51″, or 0.59″
• Fluid temperature range: -22°F to +338°F (depending on tube material)
• Ambient temperature — digital positioner: +14°F to +167°F
• Ambient temperature — analog positioner: +5°F to +140°F
• Tube types: All elastomers up to Shore hardness 65°A
• Weight: 9.7 lbs (valve); 10.4 lbs (with Type 8049 digital positioner)

Applications

• Pharmaceutical and biotech manufacturing requiring sterile, no-contamination flow control
• Food and beverage processing where hygienic tube-contact-only design is required
• Chemical processing with acids, alkalis, and aggressive media
• Water and wastewater treatment systems
• Handling of gases, vapors, and liquids in critical service
• Sea water and corrosive fluid applications
• Laboratory and analytical instrumentation requiring precise, low-flow control

Type 7077 Accessories

• Type 8049 Digital Positioner – Integrated digital positioner; available in 4-wire, 2-wire, AS-i, IO-Link, Ex-proof (ExPro-FM), and explosion-proof versions for hazardous area use
• Type 8047 Pneumatic / Electro-Pneumatic Positioner – Pneumatic and electro-pneumatic positioner; available in standard 2-wire and Ex-rated versions
• Limit Switch – Position feedback accessory for end-of-travel indication
• Position Feedback – Continuous position feedback option for system integration
• Pilot Valve – Pilot valve accessory available in 24 VDC, 230 VAC, and 24 V/50 Hz versions
• Interchangeable Fixing Pieces – Three sizes (3/8″, 1/2″, 5/8″) to match tube outer diameter
• Fittings & Tubing Sets – Available in PA (polyamide), brass (nickel-plated), or stainless steel 316Ti

Documentation