This is a five-port rubber diaphragm. It is fabricated from EPDM. It features an integrated structure of fan-shaped base + 5 independent cylindrical diaphragms. Each cylindrical diaphragm consists of a "bottom hemispherical base + middle gourd-shaped transition section + top slender rod". The edge of the base is designed with mounting clips/grooves for easy assembly. Its surface is smooth and glossy free of burrs and defects. Its hardness is 60–65°. It combines elastic tension with structural rigidity. Each set of diaphragms maintains a regular shape. Cylindrical components are arranged uniformly. It enables precise embedding into the multi-interface mounting positions of pumps.As a core fluid control component for micro-dosing systems, it complies with the stringent standards of Sealed Diaphragm Pump and Sealed Fluid Transfer Pump. It is fully compatible with the application requirements of Precision Piston Assemblies and Hydraulic Piston Components.
Product Features
1. Functions
1)Precision Distribution of Micro Multi-Channel FluidIt serves as the core actuator of micro multi-channel fluid dispensing pumps. It converts pump power into quantitative delivery of multi-channel fluid through synchronous/independent deformation of the 5 independent cylindrical diaphragms. It achieves precise multi-line distribution of trace fluids (e.g., reagent and sample liquid dispensing). This fluid control performance meets the rigorous demands of Mini Sealed Valve and Sealed Fluid Direction Control Valve for micro-fluid systems.
2)Multi-Channel Sealing and IsolationThe hemispherical base of each cylindrical diaphragm fits tightly against the pump flow channel interface. The base seals with the pump cavity at the same time. It prevents fluid cross-contamination between channels. It blocks external impurities from invading the flow channels. It ensures the purity and independence of multi-channel fluid.
3)Adaptation to High-Frequency Micro-Movements of PumpsIt leverages the elasticity and hardness characteristics of EPDM. It adapts to the high-frequency micro-reciprocating motions of dispensing pumps. It responds rapidly to pressure changes during trace fluid delivery. It maintains flow consistency across all channels.
2. Performance Characteristics
1)EPDM Material + 60–65° Hardness for Trace Fluid ScenariosEPDM boasts excellent temperature resistance (-40℃~150℃) and medium compatibility (compatible with trace fluids such as reagents and sample liquids). It is non-toxic and free of extractables. It complies with fluid contact standards for laboratory and medical applications. The 60–65° medium-hardness setting ensures the deformation flexibility of cylindrical diaphragms for precise trace fluid control. It provides anti-creep capability at the same time. It avoids deformation after long-term high-frequency operation. It maintains flow accuracy of each channel. This performance advantage aligns with the technical specifications of Micro Sealed Hydraulic Pump and high-precision fluid dispensing components.
2)Five-Port Independent Cylindrical Structure Ensures Multi-Channel IndependenceThe 5 independent cylindrical diaphragms correspond to 5 fluid channels. The sealed design of the hemispherical base completely eliminates the risk of cross-contamination between channels. It enables independent distribution and control of fluid in each channel. This structural design complies with the matching standards of Multi-Port Piston Units and integrated multi-channel fluid systems.
3)Integrated Base + Mounting Clips Enhance Assembly and Operational StabilityThe fan-shaped integrated base can be precisely embedded into the pump mounting position in one step. The edge clips strengthen the fixing effect. It prevents diaphragm displacement during high-frequency operation. The high arrangement precision of cylindrical diaphragms ensures flow consistency across all channels.
3. Application Scenarios
1)Laboratory Trace Fluid DispensingIt is suitable for micro multi-channel dispensing pumps in biochemical laboratories. It is used for reagent dispensing in enzyme-labeled instruments and PCR machines. It achieves precise distribution of trace reagents to multiple sample wells. It is a key component for the operation of Reciprocating Pistons in laboratory fluid control equipment.
2)Medical Sample Processing EquipmentIt is applicable for multi-channel sample dispensing pumps in medical testing equipment. It controls the micro-delivery of samples such as blood and urine through multiple lines. It ensures testing accuracy. It meets the precision requirements of Precision Piston Assemblies in medical fluid systems.
3)Micro Electronic Fluid SystemsIt is used for multi-channel fluid dispensing pumps in micro Lab-on-a-Chip systems. It realizes precise flow channel distribution of trace reagents. It complies with the quality standards of Hydraulic Piston Components in micro electronic fluid control devices.
4. Pain Point Solutions
1)Solving Multi-Channel Fluid Cross-ContaminationOrdinary multi-channel diaphragms have poor sealing and isolation performance. They easily lead to cross-contamination between channels and contaminates samples/reagents. The five-port independent cylindrical structure combined with the hemispherical sealed base of this product completely eliminates the risk of cross-contamination. It optimizes the reliability of Multi-Port Piston Units in multi-channel fluid systems.
2)Resolving Insufficient Precision in Trace Fluid DispensingLow-hardness diaphragms are prone to excessive deformation leading to flow deviation. High-hardness ones respond sluggishly. The 60–65° hardness balances deformation flexibility and stability. It ensures the dispensing precision of multi-channel trace fluid. It improves the accuracy of Mini Sealed Valve auxiliary fluid control components.
3)Addressing Low Efficiency and Deviation in Multi-Channel AssemblyAssembling decentralized multi-channel seals is cumbersome. It is prone to positional deviation. It results in inconsistent flow rates. The integrated base + clip design enables one-step precise assembly. It ensures the position and flow consistency of each channel. It enhances the assembly efficiency of Sealed Fluid Direction Control Valve multi-port systems.
4)Solving Diaphragm Deformation and Failure Under High-Frequency Micro-MovementsMicro dispensing pumps feature high operating frequency and small deformation amplitude. Ordinary diaphragms are susceptible to fatigue deformation. The anti-aging and anti-creep properties of EPDM material allow it to withstand long-term high-frequency micro-movements. It extends the service life of the diaphragm. It reduces the replacement frequency of Sealed Diaphragm Pump core components.
