The Directory of Solenoid Valves

 

Solenoid Water Valves, Air Solenoids, Proportional Solenoid Valves, Pneumatic Valves & Air Valves.

 

Solenoid valves and solenoid water valves are electrically operated devices that control the flow of liquids. Solenoid valves are electro-mechanical devices that use a wire coil and a movable plunger, called a solenoid, to control a particular valve. The solenoid controls the valve during either the open or closed positions. Thus, these kinds of valves do not regulate flow. They are used for the remote control of valves for directional control of liquids. Solenoid water valves have two main parts: the solenoid and the valve. After the coil receives a current, the actuating magnetic field is created. The magnetic field acts upon the plunger resulting in the actuation of the valve, either opening or closing it.

 

Solenoid valve manufacturers produce two general types: direct-acting and pilot-operated. Direct-acting solenoid valves have a plunger that is in direct contact with the primary opening in the body. This plunger is used to open and close the orifice. The pilot-operated solenoid valve works with a diaphragm rather than a plunger. This valve uses differential pressure to control the flow of fluids. The air-venting valve is opened to allow the pressure to equalize and permit the fluids to flow through.

 

Solenoid valve manufacturers design their products for many applications. Their most common use is as solenoid water valves, oil valves, gas valves, steam valves, solvents valves, cryogenics valves, air and vapors valves, as well as many other applications as hydraulic valves and pneumatic valves. Typical environments for solenoid valves are in medical and biomedical equipment, analytical instrumentation, semiconductors, HVAC and other industrial OEM environments. A unique feature that solenoid valve manufacturers equip their products with is an automatic triggering from remote locations by different voltages, making them useful in rough or hazardous locations.

 

Important items to consider when looking at solenoid valves are proportionality, linearity, frequency response, repeatability, power consumption, leakage, life expectancy and cost. With so many types of solenoid valves and other related valves, the application requirements are very important. Because solenoid valves are designed to perform operations, ranging from water valves, air valves, pneumatic valves, or used in applications such as ones to restrict, meter and maintain the flow of liquid and gaseous materials, they are widely used in vastly different fields and industries.

 

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2-Way solenoid valves are used for hydraulic and pneumatic applications. 2-Way solenoid valves have two ports called pressure and service ports.

 

3-Way solenoid valves are for hydraulic and pneumatic applications. 3-Way solenoid valves have three ports, one being the pressure port, one the tank and the last, the service port.

 

Air solenoids are control air flow in a pneumatic system.

 

Air valves regulate the release of air.

 

Hydraulic solenoid valves use fluid pressure and are ported through the return line to the reservoir.

 

Miniature solenoid valves fit easily into a small area and also measure or dispense small amounts of material. Mini solenoid valves are particularly useful in medical applications.

 

Plastic valves are primarily used in applications that involve corrosion or chemicals.

 

Pneumatic solenoid valves are similar to the hydraulic version in that they both use pressure. However, the return port of a pneumatic valve, which uses air, is exhausted to the atmosphere.

 

Proportional solenoid valves have direct-acting control valves with linear characteristics. Proportional solenoid valves control accuracy, hysteresis and repeatability within close tolerances.

 

Rotary solenoids valves have three bearing balls that ride on an inclined plane and turn linear motion into rotary motion. The magnetic arrangement permits direct rotational motion.

 

Solenoid water valves are electrical devices that control water flow.

 

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Analog Position Sensor : Position sensor whose voltage output differs through various values.

 

Bubble:Tight Sealing : A circumstance in which there is no leakage of air from between the internal sealed ports of the valve, whether in the energized position or not, in a five second time period. Soap bubbles are used to detect leakage.

 

Closed State : A situation in which the tubing is pinched in the valve.

 

Coil Voltage : The maximum voltage to which the coil must be energized for the valve to achieve its highest specified capacity.

 

Continuous Duty : Energizing a solenoid valve at a constant level of power for its entire on:time.

 

Current Drain : The quantity of current in amperes flowing through a solenoid valve coil when it is energized.

 

Cycle : The normal opening and closing of a valve.

 

Cycle Rate : The measure of how many times a valve is able to open and close within a set period of time.

 

Duty Cycle : Proportion of time that the solenoid receives power.

 

Flow Control : A feature that allows for the manual reducing or controlling of flow.

 

Flux Plate : Magnetic steel plate that helps transmit magnetic flux in the magnetic circuit of a solenoid valve from the enclosure to the sleeve construction. A flux plate is necessary on valves with a body construction consisting of a non:metallic body.

 

Frequency Response : Changes with the output variable in steady:state conditions, caused by a sinusoidal input variable.

 

Gain : Association of input to output or the sensitivity of a device.

 

Hysteresis : The variation between up:scale and down:scale outcomes in equipment response, when exposed to the same input from the opposite direction.

 

Normally Closed : A term that refers to a valve that is closed when unenergized.

 

Normally Open : A term that refers to a valve that is open when unenergized.

 

Open Loop : A system in which direct feedback is not supplied to gauge the response.

 

Position Sensing : Employing electronic sensors to watch the position of the valve and provide electronic feedback.

 

Pulse and Hold : Increases function of solenoid valves by reducing power consumption and heat generation. The valve is opened and held open at decreased power.

 

Pulse Width Modulation (PWM) : A technique that utilizes a modulated wave function to control analog devices.

 

Repeatability : The ability of the equipment to generate consistent results on successive tests.

 

Stroke : The space the plunger covers during a state change.