Selection Considerations for ATOS Solenoid Valves

Brand

ATOS/Italian Atos

Flow Direction

Other

3C Valve Category

Industry

Application Areas

Chemical, Petroleum, Mining, Road/Rail/Marine, Comprehensive

ATOS Piston Pumps, ATOS Gear Pumps, ATOS Axial Piston Pumps, ATOS Vane Pumps, ATOS Hydraulic Cylinders, ATOS Relief Valves

ATOS solenoid valves have a sealed chamber with through-holes at different positions, each connecting to a different oil pipe. In the center of the chamber is a piston, and on either side are two electromagnets. When the coil of one electromagnet is energized, the valve body is attracted to that side. By controlling the movement of the valve body, different drain holes are opened or closed. The inlet hole is always open, allowing hydraulic oil to enter different drain pipes. The oil pressure then pushes the piston in the cylinder, which in turn moves the piston rod, which in turn drives the mechanical device. Thus, controlling the flow of current to the electromagnets controls the mechanical movement.

ATOS Solenoid Valve Selection Considerations

ATOS solenoid valve selection should first follow four principles in order: safety, reliability, applicability, and economy. Secondly, it should be based on six aspects of the on-site operating conditions (i.e., pipeline parameters, fluid parameters, pressure parameters, electrical parameters, actuation method, and special requirements).

ATOS Solenoid Valve Selection Basis:

1. Selecting the solenoid valve based on pipeline parameters: nominal diameter (DN) and connection type

1) Determine the nominal diameter (DN) based on the on-site pipeline inner diameter or flow requirement;

2) For the connection type, generally, >DN50 requires a flange connection, while ≤DN50 can be freely selected according to user needs.

2. Selecting Solenoid Valves Based on Fluid Parameters: Material and Temperature Group

1) Corrosive fluids: Corrosion-resistant solenoid valves and all-stainless steel valves are recommended; Ultra-clean edible fluids: Food-grade stainless steel solenoid valves are recommended.

2) High-temperature fluids: Solenoid valves made with high-temperature resistant electrical and sealing materials should be selected, and piston-type valves are preferred.

3) Fluid state: Fluids can be gaseous, liquid, or mixed, especially when the diameter is greater than DN25, these must be clearly distinguished.

4) Fluid viscosity: Generally, any viscosity can be selected below 50 cSt. If it exceeds this value, a high-viscosity solenoid valve should be selected.

3. Selecting Solenoid Valves Based on Pressure Parameters: Principle and Structural Types

1) Nominal pressure: This parameter has the same meaning as other general-purpose valves and is determined by the nominal pressure of the pipeline.

2) Working pressure: If the working pressure is low, a direct-acting or step-direct-acting principle valve must be selected; when the minimum working pressure difference is above 0.04 MPa, direct-acting, step-direct-acting, and pilot-operated valves can all be selected. 4. Electrical Selection: AC220V or DC24V voltage specifications should be prioritized for convenience.

5. Selection Based on Continuous Operating Time: Normally Closed, Normally Open, or Continuously Energized

1) When the solenoid valve needs to be open for a long time, and the continuous time is longer than the closing time, a normally open type should be selected.

2) If the opening time is short or the opening and closing times are infrequent, a normally closed type should be selected.

3) However, for some safety protection applications, such as furnace and kiln flame monitoring, normally open types cannot be selected; continuously energized types should be chosen.

6. Selection of Auxiliary Functions Based on Environmental Requirements: Explosion-proof, check valve, manual operation, waterproof mist, water spray, submersible.

Selection Principles (Folded Edit Section)

Safety:

1. Corrosive Media: Plastic-coated solenoid valves and all-stainless steel valves are recommended; for highly corrosive media, diaphragm-type valves must be selected. For neutral media, solenoid valves with copper alloy valve bodies are also recommended; otherwise, rust particles will often fall from the valve body, especially in applications with infrequent operation. 1. Copper cannot be used for ammonia valves.

2. Explosive environments: Appropriate explosion-proof products must be selected. For outdoor installations or dusty environments, waterproof and dustproof models should be selected.

3. The nominal pressure of the solenoid valve should exceed the maximum working pressure in the pipe.

Applicability:

1. Media characteristics

1) Different types of solenoid valves should be selected for gaseous, liquid, or mixed states.

2) Different specifications of products should be used for different media temperatures; otherwise, the coil will burn out, the seals will age, and the lifespan will be severely affected.

3) Media viscosity is usually below 50 cSt. If it exceeds this value, a multi-functional solenoid valve should be used when the pipe diameter is greater than 15mm; a high-viscosity solenoid valve should be used when the pipe diameter is less than 15mm.

4) When the media cleanliness is not high, a backflush filter valve should be installed before the solenoid valve. For low pressure, a direct-acting diaphragm solenoid valve can be selected.

5) If the media flows in a directional manner and backflow is not allowed, a bidirectional flow valve is required.

6) The media temperature should be selected within the allowable range of the solenoid valve. 2. Piping Parameters

1) Select the valve port and model according to the medium flow direction requirements and pipeline connection method;

2) Select the nominal diameter according to the flow rate and valve Kv value, or select the same as the pipeline inner diameter;

3) Working pressure difference: For a minimum working pressure difference above 0.04 MPa, an indirect pilot-operated valve can be selected; for a minimum working pressure difference close to or less than zero, a direct-acting or step-by-step direct-acting valve must be selected.

3. Environmental Conditions

1) The maximum and minimum ambient temperatures should be within the allowable range;

2) In environments with high relative humidity or water droplets/rain, a waterproof solenoid valve should be selected;

3) In environments with frequent vibration, bumps, and impacts, a special type should be selected, such as a marine solenoid valve;

4) In corrosive or explosive environments, corrosion-resistant types should be selected based on safety requirements;

5) If space is limited, a multi-functional solenoid valve should be selected, as it eliminates the need for a bypass and three manual valves and facilitates online maintenance. 4. Power Supply Requirements

1) Select AC or DC solenoid valves according to the type of power supply. Generally, AC power is more readily available.

2) Prioritize AC220V or DC24V voltage specifications.

3) Power supply voltage fluctuations are typically +10% to -15% for AC and ±10% for DC. If these fluctuations exceed the tolerance, voltage stabilization measures must be taken.

4) Select the rated current and power consumption according to the power supply capacity. Note that AC has a higher VA value during startup; if the capacity is insufficient, indirect-acting solenoid valves should be preferred.

5. Control Accuracy

1) Ordinary solenoid valves only have two positions: open and closed. For high control accuracy and stable parameters, multi-position solenoid valves should be selected.

2) Activation Time: The time from the electrical signal being connected or disconnected to the main valve completing its action.

3) Leakage: The leakage values ​​given in the sample are for commonly used economic levels.

ATOS solenoid valves are electromagnetically controlled industrial devices, fundamental components for fluid control automation, and are actuators, not limited to hydraulic or pneumatic systems. Solenoid valves are used in industrial control systems to adjust the direction, flow rate, speed, and other parameters of the medium. They can be used with different circuits to achieve the desired control, ensuring both precision and flexibility.

ATOS Solenoid Valve Model List:

DHI-0715-X 24DC

DHI-0716-X 24DC

DHI-0717-X 24DC

DHI-0718-X 230/50/60AC

DHI-0718-X 24DC

DHI-0750/2-X 24DC

DHI-0751/2/FI/NC-X 24DC 23

DHI-0751/2/FI/NO-X 24DC 23

DHI-0751/2/WP-X 230/50/60AC

DHI-0751/2/WP-X 230/50/60AC 23 /PE

DHI-0751/2/WP-X 24DC

DHI-0751/2-X 110/50/60AC twenty three

DHI-0751/2-X 230/50/60AC

DHI-0751/2-X 24DC

DHO-0630/2/A-X 24DC 20

DHO-0631/2/A-X 24DC 20

DHO-0631/2/L1-X 24DC 20

DHO-0631/2-X 24DC

DHO-0639/O-X 24DC 20

DHO-0710-X 24DC 20

DHO-0711-X 24DC

DHO-0713-X 24DC 20

DHO-07191-X 24DC

DHO-0750/2-X 24DC 20

DHRZO-P5-012/25 20 DHU-0610/A-X 24DC 20

DHU-0610/FI/NC-X 24DC 20

DHU-0610-X 24DC 20

DHU-0610-X 48DC 20

DHU-0611-X 24DC

DHU-0614/A-X 24DC 20

DHU-0614-X 24DC 20

DHU-06191-X 24DC 20

DHU-06194-X 24DC 20

DHU-0630/2/A-X 24DC

Our company's business scope:

Hydraulic components include:

Solenoid directional valves, directional valves, check valves, stack valves, relief valves, counterbalancing valves, proportional valves, manual directional valves, flow valves, pressure reducing valves,

Throttle valves, pressure control valves, back pressure valves, filling valves, flow dividers, shuttle valves, pressure relays, cartridge valves, pneumatic valves, piston pumps,

gear pumps, vane pumps, cycloidal hydraulic motors, oil coolers, hydraulic cylinders, etc.;

Pneumatic components include:

air source processor assemblies, filters, pressure regulating valves, lubricators, solenoid valves, pneumatic valves, angle seat valves, manual valves, pull valves, foot valves,

mechanical valves, check valves, vacuum generators, cylinders, magnetic switches, shock absorbers, pressure gauges, quick couplings, floating couplings,

pressure gauge switches, water coolers, electric positioners, PU tubing, vacuum suction cups, oil filters, vibrators;

Electrical components include:

relays, sensors, converters, proximity switches, encoders, programmable controllers;

The company maintains a large inventory, with standard parts readily available. To better serve customers in various industries, the company also distributes other spare parts, with professional sourcing channels and reasonable prices.

Our products are widely used in various fields including industrial machinery, machine tools, plastics machinery, shoe machinery, brick machinery, metallurgy, mining, chemical industry, papermaking, coal mining, shipbuilding, power generation, construction machinery, and environmental protection machinery.

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