The SV20PA1-40 is a high-pressure pilot-operated check valve designed for industrial and water-related applications, as well as household use. It follows the DIN standard and is manufactured under ISO 9001 specifications. This valve is made from nodular cast iron (Qt500) and can be branded as Power or OEM. It is packaged in cartons and originates from China, with HS Code 8481201000.
This hydraulic valve features a pilot piston structure and operates on DC solenoid power. It is available in different configurations, including sub-plate mounting with porting patterns according to DIN 24 340 Form A, ISO 5781, and CETOP-RP 121 H. It also supports threaded connections and offers options such as drain ports and unloading functions.
There are four cracking pressure settings available, allowing flexibility based on system requirements. The SV and SL series are poppet-type valves that allow reverse flow when activated. They are used to isolate operating circuits under pressure, preventing load drop or unwanted movement of hydraulically locked actuators.
The basic components include a housing, a poppet, a compression spring, a control spool, and optionally a pre-opening ball poppet valve. The SV model does not have a drain port, while the SL model includes one. The SV...A and SL...A versions feature a pre-opening mechanism, which helps reduce pressure shocks during decompression.
In operation, the control piston moves to the right when pressure is applied at the control port X, pushing the poppet away from its seat to allow fluid flow in the reverse direction. For the SV model, this is achieved without a drain port, whereas the SL model has an additional leakage port Y to manage pressure more effectively.
The design ensures reliable performance and durability, making it suitable for a wide range of industrial applications. The product comes with detailed technical drawings and images for reference, showcasing the internal structure and key components of the valve.
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