***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Hydraforce directly.***
The Hydraforce SP08-21-0-N-00 (5003480) is a solenoid-operated, 2-port, normally open, poppet type proportional screw-in hydraulic cartridge valve. It is specifically designed for low leakage in load-holding applications, ensuring efficient control and reliability. The valve operates by allowing flow from port 2 to port 1 when de-energized, while severely restricting flow from port 1 to port 2. As the valve becomes partially energized according to its performance curve, it begins to throttle the flow from port 2 to port 1. Full energization results in the poppet closing tightly against the seat to block this flow completely. This model features a continuous-duty rated coil and efficient wet-armature construction that enhances its operational reliability and durability. It also offers optional waterproof E-Coils that are rated up to IP69K, making them suitable for harsh environmental conditions. The valve is designed with an industry-common cavity which facilitates compatibility and ease of installation in various system configurations. Constructed from steel with hardened work surfaces and exposed surfaces plated as per Hydraforce specification plt033, it withstands up to 960 hours of salt spray per ASTM B117-09 before showing signs of corrosion (red rust). This robust construction ensures long-term performance even under challenging conditions. The SP08-21-0-N-00 operates effectively within a hydraulic pressure rating of up to 207 bar (3000 psi) and demonstrates maximum internal leakage of just five drops per minute at this pressure level. It accommodates a range of operating fluid temperatures: -40°C to +100°C with Buna N seals, -26°C to +204°C with Viton seals, and -54°C to +107°C with polyurethane seals. The cartridge installation requires a torque between 25.8 to 28.5 Nm, ensuring secure fitting without overtightening. Accessories available for this model include seal kits with installation instructions, various housing options like the 082W valve bodies, and coils sized for both '08 size D' and '08 size E' specifications. This versatility makes the SP08-21-0-N-00 adaptable for different setups and applications requiring precise hydraulic control.