Inner diameter seal type
Inner diameter static seals, often referred to as radial static seals, are critical for securing fixed connections within a hydraulic cylinder, most notably the interface between the piston and the piston rod. Unlike dynamic seals, these components experience no relative motion but must withstand constant system pressure. At Carlock Sealing, we engineer these radial profiles to provide maximum contact stress, ensuring a permanent gas-tight and fluid-tight barrier that remains unaffected by system vibrations.
Q: Can I use a standard O-ring for an inner diameter static seal?
A: While O-rings are common, they are prone to twisting during assembly or extruding under high-pressure pulses. Carlock Sealing recommends our machined static rings (like Square Rings or D-rings) for critical piston-to-rod connections to provide a larger sealing footprint and better stability against extrusion.
Q: How does material hardness affect static sealing?
A: Higher hardness (e.g., 90 Shore A) improves extrusion resistance in high-pressure static joints but requires higher assembly force and better surface finish. Carlock Sealing helps you balance hardness and elasticity to ensure a perfect radial seal based on your specific system pressure and groove tolerances.
Technical Disclaimer: Inner diameter static seals require a clean, defect-free groove and rod surface. Scratches or burrs can lead to bypass leakage even in static conditions. Carlock Sealing provides material certificates (TÜV/SGS) and technical guidance on the ideal radial squeeze for your specific operating media and pressure.
