Proportional control valve principle and classification

The proportional control valve is mainly used for open loop control; the output of the proportional control valve is proportional to the input signal, and the magnetic force generated by the electromagnetic coil in the proportional control valve is proportional to the current. In the traditional type of hydraulic control valve, only the hydraulic pressure setting control, for example: the pressure valve at a set pressure, the flow valve to maintain the set flow, the directional valve for the flow direction through Switch off / off. Therefore, these control valve system functions are subject to some limitations, as the technology advances, many hydraulic systems require flow and pressure can be continuous or proportional to the control valve input signal changes.Although the hydraulic servo system to meet their requirements , But also high precision, but for most industries, they do not require the system has such a high quality, and hope that under certain conditions of control performance, while low price, reliable, easy to maintain, so the ratio Control valve is developed in this context. Proportional control valve can be divided into pressure control valve, flow control and direction control valve three categories. Pressure control valve: Proportional solenoid valve to replace the pilot-operated relief valve device will become a pilot-scale proportional relief valve, the hydraulic pressure output by the input signal continuously or in proportion to control. Flow control valve: Proportional solenoid valve instead of throttle or governor valve hand device and the input signal to control the throttling valve or throttle opening, continuous or proportional control of its output flow. Therefore, the opening of the throttle can be determined by the input signal voltage. Directional Control Valve: Proportional Solenoid Instead of a directional valve, a general solenoid valve forms a direct acting proportional directional control valve. The slide shaft not only transposes it, but also translates the stroke continuously or proportionally, thus connecting the ports The oil area can also vary continuously or proportionally so the proportional directional control valve not only controls the direction of movement of the actuator but also controls its speed. The above various proportional valve hydraulic components actuated hydraulic cylinder or hydraulic motor.

Marine Aquarium Lighting

With spiralling energy costs accompanying the constant need to replace bulbs and tubes our 2 ranges of Marine Aquarium Lighting makes perfect sense.A conservative savings in electricity consumption of up to 50% can be achieved over metal halides and 25% onT5 Fluorescents.

Aquarium Led lighting

2 Manual dimmers for White, Blue change the intensity of lighting

Simulates the sunset and sunrise

55pcs 3w leds offer lighting to tank effectively

Adjustable kits, detachable cords

Philizon Lighting is dedicated to provide high quality and durable lighting product for customer with very competitive price.Our products mainly foucs on LED Grow Lights and LED Aquarium Light.The equipment and materials to produce hydroponics led Grow Light and marine Aquarium Led Light fixture imported from Taiwan, Japan, Korea and Unites States, such as automatic SMT machine, reflowsoldering machine,all kinds of electric test equipment, large integrating sphere and such sorts of productionand R&D equipment.

Item Display

Key Features

1.The lifespan is over 50000 hours,low maintenance costs.

2.Energy conservation,saving over 80% energy than the traditional HPS.

3.High light efficiency,90% of the light will be absorbed by the aquatic plants,while just 8%-10% to the HPS.

4.Build-in cooling system,could solve the heat dissipation excellently.

5.Built-in power supply, CE approved, No setup required, just simpler and safer plugs directly into AC85V-264V, no reflector & ballast needed.

Package Include

1 X LED Aquarium Light

1 X Free Hanging Kit

1X Free Power Cord

All the lamps have passed strict quality examination and are packed carefully before shipping.In order that our customers get high quality lamps,we attach importance to every details.

Application

1. coral reef lighting,fish tank lighting,coral reef tank lighting

2. aquarium lighting,aquarium art,aquarium shop,aquarim centre

3. fish bowl lighting,fish lighting,freshwater lighting,saltwater lighting

Our LED Plant Grow Light and led aquarium lamp are popular in led market,cause its elegant outlook and its high quality and competitive price.We are eager to kick off cooperation with you, our valuable customers. Let`s work together and save the energy.

Warmly welcome to visit Philizon in Shenzhen China.

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Shenzhen Phlizon Technology Co.,Ltd. , https://www.szledaquariumgrowlight.com