Masterflex B/T Pneumatic Peristaltic Pump Model 77111-80

Overview

The Masterflex^® B/T Pneumatic Peristaltic Pump Model 77111-80 is an intrinsically safe, air-driven peristaltic pumping system engineered for precise, contamination-free fluid transfer in high-risk industrial and regulated laboratory environments. Unlike electrically actuated alternatives, this pump operates exclusively on compressed air—eliminating spark generation and enabling reliable operation in hazardous locations where flammable vapors, corrosive fumes, or explosive atmospheres are present. Its core mechanism relies on positive displacement via occlusion: a rotating rotor compresses elastomeric tubing against a rigid housing, creating sequential peristaltic motion that propels fluid unidirectionally without internal wetted parts. This design ensures complete fluid isolation, eliminates valve wear, prevents backflow, and supports sterile or shear-sensitive media handling—critical for pharmaceutical processing, chemical synthesis, inkjet formulation, and hazardous waste transfer.

Key Features

• Stainless steel pump head and housing for corrosion resistance and long-term structural integrity in aggressive chemical environments.
• Intrinsically safe operation certified to ATEX Zone 2 (EEx II 3Gc IIC T6) and NEC Class I, Division 2, Groups A–D, T6—fully compliant with international hazardous area classification standards.
• Integrated safety interlock: power disengagement automatically activates when the pump head cover is opened, preventing accidental actuation during tubing replacement or maintenance.
• IP56-rated enclosure provides protection against dust ingress and powerful water jets—enabling direct washdown with water or mild detergents after use.
• Digital speed control with 35–321 rpm range offers fine-grained flow adjustment; resolution and repeatability support GLP/GMP-aligned process documentation.
• Optimized for dual-tube compatibility: accepts both B/T 87 (12.7 × 25.4 × 6.4 mm) and B/T 91 (19.1 × 31.8 × 6.4 mm) tubing configurations, delivering scalable flow rates from 1.9 to 37 L/min.
• Robust pneumatic motor rated at 0.75 hp (560 W), capable of sustaining continuous operation under inlet pressure up to 6.9 bar (100 psi) and airflow of 0.68 m³/min (24 CFM).

Sample Compatibility & Compliance

The Model 77111-80 accommodates a broad spectrum of chemically diverse fluids—including organic solvents (e.g., acetone, THF, chlorinated hydrocarbons), aqueous acids and bases, UV-curable inks, high-viscosity suspensions (up to 10,000 cP), and biopharmaceutical buffers—without risk of cross-contamination or material degradation. Tubing selection directly governs chemical compatibility and pressure tolerance: Tygon^® LFL (standard supplied), platinum-cured silicone, enhanced bio-platinum silicone, and fluorosilicone variants are available per application-specific requirements. The system complies with ISO 9001:2000 quality management protocols and carries CE marking under the EU Machinery Directive 2006/42/EC and ATEX Directive 2014/34/EU. It meets electromagnetic compatibility (EMC) and low-voltage safety requirements per EN 61000-6-2/6-4 and EN 60204-1.

Software & Data Management

While the 77111-80 operates as a stand-alone pneumatic unit without embedded firmware or digital connectivity, its analog-compatible speed control interface allows integration into centralized process control systems via 0–10 VDC or 4–20 mA analog input signals. When deployed within validated environments (e.g., FDA-regulated manufacturing suites), users may implement external data acquisition hardware to log speed setpoints, runtime duration, and operational status—supporting audit trails required under 21 CFR Part 11 for electronic records and signatures. Calibration verification can be performed using gravimetric or volumetric methods traceable to NIST standards; routine verification intervals align with ISO/IEC 17025 guidelines for testing laboratories.

Applications

• Continuous dosing of reactive monomers and catalysts in polymerization reactors.
• Transfer of pyrophoric reagents or peroxide-forming solvents in inerted gloveboxes.
• High-purity solvent delivery in HPLC mobile phase preparation and column cleaning workflows.
• Accurate metering of conductive inks in printed electronics fabrication lines.
• Recirculation of cell culture media in closed-loop bioreactor systems requiring zero-metal-contact fluid paths.
• Hazardous waste collection and neutralization feed systems in chemical fume hoods or vented enclosures.

FAQ

What tubing sizes are compatible with the Model 77111-80?
The pump accepts two standard B/T tube configurations: B/T 87 (12.7 × 25.4 × 6.4 mm) and B/T 91 (19.1 × 31.8 × 6.4 mm). Custom tubing diameters may be evaluated subject to occlusion geometry validation.
Is electrical power required for operation?
No—this is a fully pneumatic system. Only compressed air (minimum 2.7 bar, recommended 6.9 bar) is needed; no AC/DC power supply is installed or required.
Can the pump be integrated into a PLC-controlled process line?
Yes. Analog speed control inputs (0–10 VDC or 4–20 mA) enable seamless integration with programmable logic controllers for automated flow scheduling and interlocked start/stop sequences.
What maintenance intervals are recommended?
Tubing replacement frequency depends on flow rate, pressure, and chemical exposure; typical service life ranges from 100–500 hours. The stainless steel pump head requires only periodic visual inspection and wipe-down—no lubrication or bearing servicing is necessary.
Does the system include tubing upon shipment?
Yes—the standard configuration includes one 0.9-meter length of Tygon^® LFL tubing (B/T 91 size). Additional tubing must be ordered separately based on chemical compatibility and regulatory requirements (e.g., USP Class VI, FDA 21 CFR 177.2600).