Short answer:The silicone tubing in a pinch valve must completely shut off the flow path with minimal force and quickly return to its original inner diameter when released. Wall thickness, hardness, circularity of the cross-section, clamp width, and medium pressure must be designed in conjunction.
In what kinds of situations are these silicone parts suitable?
Clearly defining the actual application scenarios helps translate material, structural, and validation requirements into actionable technical specifications.
- Medical, Laboratory, and Fluid Control Equipment
- Automated Filling Lines for Food and Beverages
- A dead-space-free, easy-to-clean on/off flow path
Parameters to Confirm Before Selecting a Model
We recommend providing the following information before requesting a quote or ordering a sample to minimize the need for repeated prototyping and misunderstandings regarding specifications.
- Working Pressure, Pipe Diameter, and Fluid Viscosity
- Valve Clamp Stroke, Effective Width, and Driving Force
- Cycle Frequency, Service Life, and Allowable Flow Rate Decay
Key Points in Structural Design
Structural dimensions, assembly relationships, and material elasticity must be evaluated together; simply increasing a single parameter generally does not directly improve reliability.
- Optimize wall thickness to ensure complete closure and easy recovery
- Ensure there are no sharp edges on the valve clamp contact surface that could cut the hose
- Controlling Pipe Pre-stretching and Installation Eccentricity
Production and Quality Control
Consistency in mass production results from the combined control of material batches, mold condition, molding windows, and inspection methods.
- Monitor roundness, eccentricity, and wall thickness during extrusion
- The surface must be free of scratches, pinholes, and dents.
- Controlling Permanent Deformation Using a Stable Vulcanization Process
Recommended Verification Items
Validation should be conducted using actual or equivalent operating conditions whenever possible, and functionality should be reconfirmed after aging or cycling.
- Testing the full shut-off capacity at maximum pressure
- Check the recovery time and flow rate after cyclic clamping
- Conduct life testing under the target medium and temperature conditions
Frequently Asked Questions
Can pinch valve tubing be used interchangeably with peristaltic pump tubing?
Since operating conditions vary, the clamping and fatigue requirements must be verified separately.
Does increasing hardness extend service life?
It may increase the closing force, but it should not be used as a standalone improvement measure.
How do I provide information to suppliers?
Please provide 2D or 3D drawings, photos of samples, material and hardness specifications, operating environment, target quantity, acceptance criteria, and a list of compliance documents. Based on this information, Chengxin Silicone Rubber can evaluate the materials, molds, molding process, and validation plan.