LongerPump YZII15 & YZII25 Precision Peristaltic Pump Heads with Integrated Tube-Clamping Mechanism

Overview

The LongerPump YZII15 and YZII25 peristaltic pump heads are engineered for high-reliability fluid transfer in laboratory, bioprocessing, and industrial automation environments. Based on the proven Couette-flow principle of peristaltic pumping—where rollers compress flexible tubing against a rigid housing to generate positive displacement—the YZII series integrates a patented synchronized tube-clamping mechanism that eliminates manual alignment and reduces setup time by up to 70% compared to legacy YZ1515x/YZ2515x designs. This mechanical innovation ensures consistent occlusion geometry across all operating speeds, directly improving flow linearity, pulse dampening, and long-term repeatability. Both models feature a three-roller configuration with hardened stainless-steel rollers and a chemically resistant PESU (polyethersulfone) housing rated for continuous operation at temperatures up to 120 °C and compatible with sterilization via autoclaving (121 °C, 20 min). The modular design supports direct integration with LongerPump’s DC/AC drive systems (e.g., BT100-2J, DT50) and third-party motion controllers via standard analog (0–5 V / 0–10 V) or digital (RS485 Modbus RTU) interfaces.

Key Features

• Synchronized dual-action tube-clamping lever: One-handed engagement secures tubing uniformly across the entire arc of compression, minimizing operator-induced variability and preventing tube slippage during ramp-up or high-torque conditions.
• Expanded tubing compatibility matrix: YZII15 accommodates 7 standard USP Class VI-certified silicone or PharMed® BPT tubing sizes (#13–#25); YZII25 extends support to larger-bore configurations (#15, #24, #35, #36), enabling scalable flow rates from 0.5 mL/min to 3000 mL/min depending on tubing ID and pump speed.
• Precision-machined roller geometry: 3-roller arrangement with optimized contact angle (120° phase spacing) and surface finish Ra ≤ 0.4 µm ensures low shear stress on shear-sensitive media (e.g., cell suspensions, viral vectors, protein solutions).
• Autoclavable PESU housing: High-glass-transition thermoplastic offers superior hydrolytic stability, UV resistance, and dimensional retention after repeated thermal cycles—validated per ISO 10993-5 cytotoxicity testing.
• Interchangeable mounting interface: Standard 4×M4 threaded holes (ISO 2768-mK tolerance) allow drop-in replacement of YZ1515x/YZ2515x heads without adapter plates or reconfiguration of existing pump frames.

Sample Compatibility & Compliance

The YZII15 and YZII25 are validated for use with USP Class VI elastomeric tubing materials including platinum-cured silicone, EPDM, and fluoropolymer-reinforced compounds. No wetted parts other than tubing contact the fluid path, eliminating leachables and simplifying cleaning validation. The pump heads comply with IEC 61000-6-2 (immunity) and IEC 61000-6-3 (emission) standards for laboratory equipment, carry CE marking under the EU Machinery Directive 2006/42/EC, and meet RoHS 2011/65/EU restrictions on hazardous substances. When operated within specified speed and tubing parameters, both models support GLP-compliant workflows requiring audit-trail-capable controllers (e.g., LongerPump LSP02-1B with FDA 21 CFR Part 11–enabled software).

Software & Data Management

While the pump heads themselves are electromechanical components without embedded firmware, they are fully interoperable with LongerPump’s LSP series controllers and third-party SCADA/HMI platforms. Real-time flow calibration curves can be generated using the manufacturer’s FlowCal™ desktop application (Windows/macOS), which imports motor encoder feedback and correlates RPM-to-volume data per tubing type. All calibration profiles—including occlusion offset, backflow compensation, and pulse smoothing coefficients—are exportable as CSV or XML for integration into LIMS or MES systems. Audit logs recording head installation date, tubing batch ID, and recalibration timestamps may be maintained externally via controller-based logging compliant with ISO/IEC 17025 clause 7.7.

Applications

• Biopharmaceutical manufacturing: Media and buffer transfer in single-use bioreactors (SUBs), harvest clarification lines, and chromatography column loading where particulate-free, non-invasive flow is critical.
• Clinical diagnostics: Precise reagent metering in automated immunoassay platforms (e.g., ELISA, CLIA) meeting CLSI EP10-A3 accuracy requirements (±2% full-scale).
• Environmental monitoring: Continuous sampling of wastewater effluents or groundwater via submersible probe housings with IP68-rated motorized drives.
• Academic research: Controlled infusion in microfluidic perfusion systems, organ-on-chip devices, and electrochemical flow cells requiring pulsation <5% CV at 100 mL/min.
• Food & beverage QA/QC: Aseptic transfer of viscous products (yogurt, sauces) where CIP/SIP compatibility and clean-in-place validation are mandatory.

FAQ

Can the YZII15 and YZII25 be used interchangeably on the same pump drive?
Yes—both heads share identical mounting dimensions, shaft coupling diameter (6 mm), and torque transmission profile, allowing field-swappable deployment without mechanical recalibration.
What is the maximum allowable inlet pressure for these pump heads?
The YZII series is designed for atmospheric or slight positive inlet pressure only (≤ 0.2 bar gauge); backpressure exceeding this threshold requires an upstream pressure regulator or relief valve to prevent tubing extrusion.
Is tubing occlusion adjustable on these models?
No—occlusion is factory-set to 12 ± 0.3% for optimal balance of flow efficiency and tubing life; field adjustment is not supported to maintain traceability and regulatory compliance.
Do these pump heads support dry-run operation?
Continuous dry running is not recommended; however, brief (<30 s) dry starts are tolerated due to PESU’s low-friction coefficient and roller surface hardening—verified per ASTM D3702 wear testing.
Are replacement rollers and housing seals available as spare parts?
Yes—genuine LongerPump spare kits (P/N: ROLLER-YZII-3PK, SEAL-YZII-SET) are stocked globally and supplied with dimensional certification reports traceable to NIST standards.