I'm over here from the smoke-and-mirrors side looking for some guidance on a valve I need.I have to electrically control grease, (Lithium Complex), going to a greasing tool on an assembly line. The grease is delivered by a pipe to 'this' solenoid valve. The hose is 3/8". Pressure is about 1000psi. I will be opening the valve for a few hundred milliseconds to feed from the valve down a 15 foot hose to the applicator.Grease.. I am not actually sure of what kind of valve I should be hunting for. Probably NOT a piloted valve. Is this going to be a needle valve? I presume this is in the realm of hydraulics and so should be rated as such and not be some brass Asco.Perhaps you could use something like an air actuated spool valve.If you had a 4 way valve you could energise it to pick up a small volume of grease then when it de-energized blow the grease down the line with air. That way you would be able to meter the grease with a timed pulse.Come to think of it you would need a 3 way for the grease and a 2 way for the air.Step 1 - energise spool valve opening ports A&B, spool fills with grease from A but cannot escape because you have port B pluggedStep 2 - de-energise spool valve which now uncovers ports C&D.Step 3 - Open 2 way air valve connected to port C and blow grase out of port DStep 4 - close air valve.

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