Schubert & Salzer – Type 7071 Mini Pinch Valve

Overview

The Schubert & Salzer Type 7071 is a pneumatic mini pinch valve engineered for small-bore, endless-tube applications in chemistry, analytical instrumentation, and medical technology. Its compact polyamide body clamps customer-supplied flexible tubing in sizes from 1/24″ to 1/8″ outside diameter, keeping all wetted surfaces completely isolated from the valve body.

The Type 7071 is available in normally closed (NC) and normally open (NO) versions, with fast switching times and a simple tube-change design that minimizes downtime. The valve is suited for on/off control of acids, alkalis, gases, vapors, seawater, and a wide range of process liquids.

Features & Benefits

• No fluid contact with the valve body — all process media contacts only the customer-supplied flexible tube, eliminating corrosion and contamination concerns
• Fast and simple tube replacement — reduces maintenance time with tool-free tube changeover
• Pneumatic piston actuator (1″ bore) — provides reliable on/off actuation with pilot pressures from 15 to 90 psi
• Available in normally closed (NC) and normally open (NO) configurations — each ordering number includes inserts for 1/24″, 1/16″, and 1/8″ tube sizes
• Reverse of function possible — configuration flexibility for system design
• Compact, lightweight design — weighs only 0.15 lbs, suited for tight installations
• Glass-reinforced polyamide 12 body — durable non-wetted construction
• Lip seal in BUNA-N (NBR) — reliable sealing for pneumatic actuation circuit

Technical Specifications

• Tube orifice sizes: 1/24″, 1/16″, 1/8″
• Tube outside diameter range: 0.15″ to 0.35″
• Working pressure (NC version): 0–30 psi (1/24″), 0–25 psi (1/16″), 0–15 psi (1/8″)
• Working pressure (NO version): 0–75 psi depending on tube quality (50–70 Shore) and pilot pressure
• Pilot pressure range: 15–90 psi
• Maximum pilot pressure: 90 psi
• Pilot connection thread: M5
• Actuator type: Pneumatic piston, 1″ diameter
• Switching time (opening): 0.05 sec (NC) / 0.10 sec (NO)
• Switching time (closing): 0.20 sec (NC) / 0.10 sec (NO)
• Media temperature: -22°F to +212°F (depending on tube material)
• Ambient temperature: -22°F to +140°F
• Viscosity of working medium: 90–150 cSt
• Body material: Polyamide 12, glass-reinforced (30%)
• Seal material: BUNA-N (NBR)
• Weight: 0.15 lbs
• Ordering number (NC): 4 005 038
• Ordering number (NO): 4 005 035

Applications

• Chemical and analytical instrumentation — on/off control of acids, alkalis, and reagents
• Medical device and laboratory equipment — sanitary-compatible fluid control with no valve body contamination
• Fluid power systems — compact pneumatic switching for small-bore tubing circuits
• Gases and vapors — safe isolation where valve body corrosion must be avoided
• Seawater and aggressive liquid handling — corrosion-free operation via tube-only media contact

Type 7071 Accessories

• Customer-supplied flexible tubing — compatible with outside diameters from 0.16″ to 0.35″; tube material and Shore hardness selected based on process media and required working pressure

Documentation