News
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China’s National Day Holiday Notice
As National Day approaches, Yokey would like to thank our customers and partners for their continued trust and cooperation. Holiday Schedule Yokey will observe a four-day National Day holiday from October 1 to October 4, 2026. During this period, response times for messages, order inquiries and r...Read more -
When a Filter-Housing Seal Leaks After Maintenance: Tracing Differential-Pressure and Disassembly Damage
Executive Summary: Reconstruct the Event Before Replacing the Seal This guide is for design, maintenance, reliability and quality engineers investigating a filter-housing leak that appears after differential-pressure exposure, opening, cleaning or reassembly. The first question is not whether the...Read more -
Pulsating Flow in Rotor-Pump Face Seals: How Interface-Film Changes May Contribute to Leakage
Executive Summary: What Should an Engineer Determine After Pulsation? For design, maintenance, reliability and failure-analysis engineers, the practical question is not whether a rotor pump shows pulsation, but whether the pulsation is changing the local face-seal condition and contributing to le...Read more -
Load Changes in Safety-Valve O-Rings During Repeated Lift Events
Executive Summary: What Should an Engineer Determine After Repeated Lift? When a safety valve repeatedly opens and reseats, maintenance, reliability and failure-analysis engineers face a specific question: has the event changed the load path at the actual O-ring interface, and could that change b...Read more -
Holiday Notice: Yokey’s Mid-Autumn Festival Holiday Schedule 2026
As the Mid-Autumn Festival approaches, Ningbo Yokey Precision Technology Co., Ltd. would like to extend warm seasonal greetings to our customers and partners around the world. A Brief Introduction to the Mid-Autumn Festival The Mid-Autumn Festival is a traditional occasion that symbolizes reunion...Read more -
Control-Valve Spool Dithering and Dynamic Seal Contact: Diagnosing Micro-Stroke Hunting, Fretting Degradation, and Interface Stability
Throttling Under Severe Pressure Drop: Why Micro-Stroke Dithering Destabilizes Dynamic Seal Contact For control-valve design, reliability, and maintenance engineers, modulating valve reliability hinges on dynamic seal integrity. In continuous process throttling, control valves often operate at lo...Read more -
Retention Zones and Cleaning Dead Spots in Hygienic Pump Seal Grooves
Executive Summary In a hygienic pump, the seal groove is both a sealing feature and a flow-access, venting and drainage boundary. Depth, side clearance, corners, surface condition and compression can create a product-retention zone that is difficult to wet, scrub and drain during CIP. The same ge...Read more -
Low-Flow Lubrication Instability in Metering-Pump Plunger Seals
Executive Summary A metering-pump plunger seal operates under reciprocating sliding, cyclic pressure and repeated start-stop conditions. Its behavior depends not only on seal material and preload, but also on whether lubricant or flush fluid can continuously replenish the local contact. When supp...Read more -
Impact Fatigue and Backflow at Diaphragm-Pump Ball-Valve Seals
Executive Summary A changed flow response, pressure trace or suspected backflow in a diaphragm pump is a condition-dependent engineering observation. Repeated ball-to-seat seating events may alter contact conditions through local loading, surface damage or a change in how the ball settles. Simila...Read more -
Thermal-Cycling Response of Static Seals in Magnetic-Drive Pump Containment Shells
Executive Summary A changed sealing response after thermal cycling is a condition-dependent observation, not automatic proof of static-seal failure. Heating and cooling may change relative dimensions, contact pressure, compression retention, stress relaxation, fluid exposure, particle position, p...Read more -
Outgassing Changes in Clean-Equipment Seals After Low-Temperature Transport
Executive Summary A change in clean-equipment seal outgassing after low-temperature transport should initially be treated as a state- and measurement-dependent observation, not automatic proof of permanent seal damage. Cooling and storage may alter molecular mobility, moisture distribution, adsor...Read more -
Crystal Deposition and Restart Leakage at Wet-Process Equipment Drain Seals
Executive Summary Restart leakage at a wet-process equipment drain seal should be treated as a sequence-dependent boundary symptom, not automatic proof of seal-material failure. Liquid residue may remain near a drain outlet, dry into a deposit, alter local contact or restrict the discharge path, ...Read more