The pressure spring marked with code K 27705 is a vital element in the relief valve assembly of the ZV40/48 engine, functioning to regulate pressure within the system. Engineered to maintain consistent pressure thresholds, this spring ensures the relief valve opens and closes at precise pressure points, preventing potential overpressure scenarios and safeguarding vital engine components. Its robust design and high-tensile strength enable it to endure repeated stress cycles, making it indispensable for maintaining optimal engine performance and operational safety.