Vickers DG4V 3S 2A M U B5

Forty liters per minute is the rated flow capacity for this valve, and press applications are actually one of the listed use cases for it. Running near the top of that range continuously is a different story than occasional peaks, so keeping your system demand comfortably below that ceiling will give you more headroom and longer service life from the seals and internals. The Buna-N seals are a solid choice for general hydraulic fluid compatibility, but how the valve holds up under sustained high-flow press duty depends heavily on your system pressure, fluid cleanliness, and operating temps staying within range.

Application-wise, it's designed to hold up in environments like machine shops, plus die casting, marine, and offshore applications. The Buna-N seals should offer decent resistance to typical coolants, but continuous submersion probably wouldn't be ideal.