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Connexion Developments are exclusive Solenoid Valve Distributors for Shako Fluid Power Ltd, CS Fluid Power Ltd., Z-Tide, ERA-SIB, Nass Magnet, Queen and DS Dynatec. If you need a valve for a special application make Connexion Developments your first choice: if we can't find the answer straight away then we will find one. Solenoid Valves For Vacuum or Low pressure applications such as header tank pressures or closed loop systems with little or no differential pressure across the valve we use a "Zero Rated" Solenoid Valve. These will work with zero or little pressure differential. A "Direct" Solenoid Valve uses the armature directly over the valve seat as the mechanical means to Directly open and close the valve regardless of the media pressure - Good for High Pressures with normally Lower flow capabilities. A "Servo Assisted" or "Pilot Operated" Solenoid Valve uses the pressure difference across the Solenoid Valve (Difference In Pressure from the inlet to the outlet ports) to do the mechanical work of lifting the diaphragm or piston. Most valves of this design require between 0.2 to 2 bar pressure difference to operate correctly, normally about 10% of the working pressure. Choice of valve size is of paramount importance in achieving the correct pressure differential as too much or too little could adversely affect the operating function of the valve. Is my solenoid Valve Rusty? Recently we found rust on the solenoid valve tube. But the funny thing is we did not found any rust before. Does different batch of this stainless steel can give different properties? If yes, what can we do to check it? This is quite typical for 303 stainless steel tubes, which are a high sulphur free machining grade stainless. You may be having a sulphide problem and not a rusting problem at all. Sulphides will bloom to the surface when exposed to moisture and look very similar to rust. Try soaking the part in 10% NaOH (Sodium Hydroxide) overnight and see if it goes away. If it does go away or wipes off it is sulphides, not rust. Water Hardness the affects on Solenoid Valves Hard water under a threshold of 20-25 French degrees the valve should not be affected by scale build ups provided that the system undergoes regular servicing. Nickel plated bodies and covers offer a better response. If you are aware of possible scale build ups then you should have equipped the plant with a water softening system, since water treatment is the only solution to be recommended. French degrees (°f) (shares symbol with degree Fahrenheit, but in lowercase) - conversion to mg/L calcium: divide by 0.25 |
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