The ERVE08021-01-C-VS-3,4 is a reliable, screw-in type hydraulic pressure relief cartridge valve designed to protect hydraulic circuits against overpressurization. Engineered for seamless installation into standard 08-series manifold cavities, it features a robust hexagonal mounting head equipped with an internal hex socket for precise and secure pressure adjustments. The valve incorporates a high-quality sealing configuration, utilizing green Viton (VS) O-rings alongside durable backup rings to ensure optimal leak prevention and fluid compatibility across demanding industrial and mobile hydraulic applications.