Needle Valves

/ Needle Valves #1  

MrChris

Gold Member
Joined
Dec 13, 2006
Messages
341
Location
Georgia
Tractor
Mahindra 3215HST
Thinking of adding needle valve/s to get finer control of my hydraulic top link cylinder. I have one set of remotes (2 hoses with 2 QD). Do I need to add a valve on each hose or just one since I understand a needle valve restricts flow in both directions? Thanks.
 
/ Needle Valves #2  
The purpose of a needle valve is to restrict flow . Same amount of flow in both directions.

The purpose of a flow control valve is to restrict in one direction, and free flow in the otherdirection

This needle valve has flow in both directions.

Surplus Center - 3/8 NPT 8 GPM PRINCE WNV-600 NEEDLE VALVE

This flow control valve has restricted flow in one direction and full flow in the other direction.

http://www.surpluscenter.com/item.asp?item=9-10440&catname=hydraulic

Meter in or out.

http://www.edgeroamer.com/sweethaven/mechanics/hydraulics01/default.asp?iNum=0504


Only one valve required.
 
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