Masterflex L/S High-Performance Pump Head Model 77252-72

Overview

The Masterflex L/S High-Performance Pump Head Model 77252-72 is an engineered peristaltic pump head designed for demanding laboratory and industrial fluid handling applications where precision, chemical resistance, and sustained pressure performance are critical. Operating on the fundamental principle of peristalsis—where rotating rollers compress elastomeric tubing to generate positive displacement—the 77252-72 delivers repeatable, pulse-free flow without product contamination or mechanical seal wear. Its robust architecture supports continuous operation under elevated backpressure up to 150 psi (10.2 bar) when paired with high-pressure L/S HP-series tubing, significantly extending tube service life compared to standard peristaltic heads. The pump head is intended exclusively for use with Masterflex L/S-series multi-head drivers capable of powering two or more pump heads simultaneously—ensuring synchronized speed control and scalable flow output across parallel channels.

Key Features

• Side-inlet/side-outlet tubing path enables flexible installation in space-constrained enclosures—supports both vertical and horizontal mounting without flow-path reconfiguration.
• Full stainless steel (SS316) construction of rollers, shafts, bearings, and rotor plate ensures long-term dimensional stability and corrosion resistance in aggressive chemical environments.
• PPS (polyphenylene sulfide) occlusion bed provides exceptional thermal stability (continuous use up to 200 °C), low moisture absorption, and broad chemical compatibility—including resistance to strong acids, bases, solvents, and oxidizers.
• Optimized roller geometry and precise bearing alignment minimize tubing fatigue and maximize volumetric accuracy across the full speed range (0.02–3400 rpm).
• Designed for seamless integration with Masterflex L/S 100RPM, 200RPM, and 400RPM drivers—enabling coordinated multi-pump operation for complex dosing, blending, or recirculation protocols.
• Non-stackable design ensures mechanical integrity and consistent occlusion force; no daisy-chaining or cascaded mounting permitted per manufacturer specifications.

Sample Compatibility & Compliance

The 77252-72 accommodates eight standardized L/S tubing sizes—four high-pressure variants (L/S 14HP, 15HP, 16HP, 24HP) and four standard-performance types (L/S 15, 24, 35, 36)—each validated for specific flow ranges, pressure tolerances, and chemical exposure profiles. All compatible tubing meets USP Class VI biocompatibility requirements and complies with FDA 21 CFR 177.2600 for food-contact applications. For hazardous-area installations, the ATEX-certified variant (Model 77252-82) conforms to Directive 2014/34/EU, certified EEx II 3G c IIC T6, suitable for Zone 2 gas group IIC environments. The pump head itself carries CE marking and is manufactured under ISO 9001-certified quality management systems. It supports GLP/GMP workflows through traceable calibration documentation and drive-integrated audit trail functionality when used with compliant L/S controllers.

Software & Data Management

While the 77252-72 is a mechanical pump head and contains no embedded electronics, its performance is fully controllable and monitorable via Masterflex L/S digital drivers equipped with RS-232, USB, or optional Ethernet interfaces. Compatible software platforms—including Masterflex’s proprietary FlowVision™ and third-party SCADA/HMI systems—enable real-time speed profiling, flow rate logging, runtime tracking, and event-based alarms. When integrated into automated systems, the driver records timestamped operational data (speed, direction, run time, fault codes) with audit-trail capability compliant with FDA 21 CFR Part 11 requirements. Calibration certificates for tubing volume displacement are available upon request and may be imported into LIMS or ELN systems for full analytical traceability.

Applications

This pump head serves critical roles in pharmaceutical process development (buffer preparation, media dispensing, column cleaning-in-place), chemical synthesis (reagent addition, catalyst metering), environmental testing (wastewater sampling, leachate transfer), food & beverage QC (viscosity-adjusted liquid handling), and academic research requiring sterile, shear-sensitive fluid transfer (cell culture media, enzyme solutions, nanoparticle suspensions). Its high-pressure capability makes it especially suited for HPLC mobile phase delivery, reverse osmosis feed lines, and closed-loop filtration systems where backpressure exceeds 40 psi. The PPS/SS construction ensures reliability in solvent-intensive applications such as extraction, purification, and chromatography solvent recycling.

FAQ

Can the 77252-72 be used with single-head drivers?

No—it is mechanically and electrically designed only for multi-head L/S drivers rated for ≥2 pump heads (e.g., L/S 100RPM, L/S 200RPM). Single-head drivers lack the torque and mounting interface required.
Is tubing replacement tool-free?

Yes—Masterflex’s Quick-Load™ mechanism allows full tubing installation or removal in under 15 seconds without tools, clamps, or tension adjustment.
What is the maximum allowable temperature for continuous operation?

The PPS occlusion bed and SS components support ambient operating temperatures up to 60 °C; tubing temperature limits depend on selected L/S material (e.g., silicone ≤180 °C, Viton® ≤200 °C, Tygon® ≤70 °C).
Does this pump head meet USP Chapter <1058> guidance for analytical instrument qualification?

Yes—when paired with a qualified L/S driver and documented tubing calibration, it satisfies IQ/OQ criteria for peristaltic flow devices used in regulated analytical workflows.
Can L/S HP tubing be used with standard L/S pump heads?

No—L/S HP tubing requires the enhanced occlusion geometry and roller load distribution of the 77252-series head; using it with standard heads risks premature failure and voids warranty.