Crouzet 3/2 Pneumatic Solenoid Valve - Pilot/Spring 81 Series

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Crouzet 4/2 Pneumatic Solenoid Valve - Pilot/Pilot 81 Series

Crouzet 3/2 Pneumatic Solenoid Valve - Solenoid/Pilot 81 Series 24V dc

Crouzet 3/2 NO Solenoid Valve - Solenoid/Spring Push in 0.8 mm

Crouzet 3/2 Pneumatic Solenoid Valve - 81 Series 24V ac

Crouzet 3/2 Pneumatic Solenoid Valve - Solenoid/Spring 81 Series 24V dc

Crouzet 3/2 Pneumatic Solenoid Valve - Solenoid/Pilot 81 Series 110V ac

Crouzet 3/2 Pneumatic Solenoid Valve - Solenoid/Pilot 81 Series 220 → 230V ac

Crouzet 3/2 Pneumatic Solenoid Valve - 81 Series 24V dc

Crouzet 4/2 Pneumatic Solenoid Valve - Pilot/Spring 81 Series


A solenoid valve is an electromechanically operated device that uses electric current to control the flow of fluids, such as water, gas, or oil, through a pipeline. These valves are found in countless applications, from industrial automation and fluid control systems to household appliances and irrigation. Solenoid valves offer fast and safe switching, ensuring precise control of fluid flow. They are known for their high reliability and long service life, minimising maintenance requirements. Their compact and lightweight design makes them suitable for installation in various environments. Additionally, solenoid valves can handle a wide range of fluids, making them adaptable to diverse applications.

## **Types of Solenoid Valves**

Solenoid valves can be categorised based on several factors, including the number of ports, operating principle, and construction materials. Understanding these distinctions is crucial for selecting the right solenoid valve for your specific application.

### **By Number of Ports & Positions**

The number of ports and positions in a solenoid valve determines the flow paths and control capabilities it offers.

#### **2-way Solenoid Valves**

2-way solenoid valves have two ports: an inlet and an outlet. They control the flow of fluid by either opening or closing the passage between these two ports.

- **Normally Closed (NC):** In their de-energised state, the valve is closed, blocking the flow of fluid. When energised, the valve opens, allowing fluid to pass through.
- **Normally Open (NO):** In their de-energised state, the valve is open, allowing fluid to flow. When energised, the valve closes, blocking the flow.

#### **3-way Solenoid Valves**

3-way solenoid valves have three ports and can either divert the flow of fluid between two different paths or connect one port to either of the other two ports. These valves are often used in applications requiring directional control.

#### **4-way Solenoid Valves (or 5-way)**

4-way solenoid valves have four or five ports and are commonly used to control the direction of flow in hydraulic or [pneumatic actuators](https://sg.rs-online.com/web/c/pneumatics-hydraulics/pneumatic-cylinders-actuators/). They allow for precise control of linear or rotary motion.

### **By Operating Principle**

Solenoid valves can also be classified based on their operating principle, which determines how the valve mechanism is actuated.

#### **Direct-Acting Solenoid Valves**

In direct-acting solenoid valves, the magnetic field generated by the solenoid directly acts on the valve mechanism to open or close the flow path. These valves are typically used for low-pressure and low-flow applications.

#### **Pilot-Operated Solenoid Valves (or Indirect-acting)**

Pilot-operated solenoid valves utilise a pilot mechanism to control the main valve. The solenoid controls a small pilot valve, which in turn modulates the pressure on the main valve, allowing for control of higher pressures and flow rates.

### **By Material Type**

The materials used in the construction of solenoid valves significantly influence their performance, durability, and suitability for different applications.

#### **Metal**

Metal solenoid valves are known for their robustness, high-pressure and temperature capabilities, and resistance to harsh environments. Common metals used in solenoid valve construction include:

- **Brass:** Brass is a widely used material due to its corrosion resistance, good machinability, and affordability. Brass solenoid valves are often found in water and gas applications, as well as in general-purpose industrial settings.
- **Stainless Steel:** Stainless steel offers excellent corrosion resistance, high strength, and durability, making it suitable for demanding applications involving aggressive fluids or high temperatures. Stainless steel solenoid valves are commonly used in the chemical, pharmaceutical, and food processing industries.
- **Aluminium:** Aluminium is a lightweight and cost-effective material that offers good corrosion resistance. Aluminium solenoid valves are often used in applications where weight is a concern, such as in aerospace or automotive systems.
- **Steel:** Steel provides high strength and durability, making it suitable for high-pressure and high-temperature applications. Steel solenoid valves are commonly found in industrial machinery, hydraulic systems, and oil and gas applications.

#### **Plastic**

Plastic solenoid valves offer advantages such as lightweight construction, corrosion resistance, and cost-effectiveness. Common plastics used in solenoid valve construction include:

- **Nylon (Polyamide - PA):** Nylon is a versatile material known for its strength, durability, and resistance to chemicals and solvents. Nylon solenoid valves are often used in automotive, pneumatic, and fluid control applications.
- **PVC (Polyvinylchloride):** PVC offers good chemical resistance and is commonly used in water and fluid control applications. PVC solenoid valves are often found in irrigation systems, water treatment plants, and swimming pool equipment.
- **Resin:** Various types of resins, such as epoxy or phenolic resins, are used in solenoid valve construction for their electrical insulation properties and resistance to chemicals and heat. Resin solenoid valves are often found in specialised applications where specific material properties are required.

## **Applications of Solenoid Valves**

Solenoid valves are versatile control devices [used in a wide range of industries and applications](https://sg.rs-online.com/web/content/discovery/ideas-and-advice/solenoid-valve-uses-and-benefits)to regulate the flow of liquids and gases. Their ability to provide precise and reliable control makes them essential components in various systems.

### **Pneumatic Systems and Automation**
- **Controlling Pneumatic Actuators:** Solenoid valves are commonly used to control the operation of pneumatic actuators, such as cylinders and grippers, in automated systems. They provide precise control of air flow, enabling accurate positioning and movement of actuators in various industrial processes.
- **Robotics and Automation:** Solenoid valves are integral components in robotic systems, controlling the flow of compressed air to power robotic arms, grippers, and other actuators. They enable precise and coordinated movements in automated manufacturing and assembly processes.
- **Packaging and Material Handling:** In packaging and material handling applications, solenoid valves control the flow of air to operate pneumatic cylinders, conveyors, and sorting systems. They ensure efficient and reliable movement of materials and packages in various industrial settings.

### **Hydraulic Systems**
- **Controlling Hydraulic Cylinders and Motors:** Solenoid valves are used to control the flow of hydraulic fluid to hydraulic cylinders and motors, enabling precise control of heavy-duty equipment and machinery. They are commonly found in construction equipment, agricultural machinery, and industrial automation systems.
- **Fluid Power Applications:** Solenoid valves are essential components in fluid power systems, regulating the flow of hydraulic fluids to power various applications, such as presses, lifts, and machine tools.

### **Water and Fluid Control**
- **Water Treatment and Purification:** Solenoid valves are used in water treatment plants, filtration systems, and irrigation systems to control the flow of water. They ensure efficient water management and distribution, contributing to sustainable water use.
- **Irrigation Systems:** Solenoid valves automate irrigation processes by controlling the flow of water to different zones in gardens, landscapes, and agricultural fields. They enable efficient [water distribution and conservation](https://sg.rs-online.com/web/content/discovery/ideas-and-advice/water-conservation-in-industrial-processes).

### **Oil and Gas Industry**
- **Pipeline Control:** Solenoid valves are used in oil and gas pipelines to control the flow of hydrocarbons, ensuring safe and efficient transportation.
- **Wellhead Control:** In oil and gas wells, solenoid valves control the flow of oil and gas from the wellhead, regulating production and ensuring safety.
- **Refinery and Petrochemical Processes:** Solenoid valves are essential components in refineries and petrochemical plants, controlling the flow of various fluids and gases in complex processing operations.

## **Your Trusted Solenoid Valve Supplier in Singapore**

RS Singapore is a trusted supplier and distributor of solenoid valves, featuring industry-leading brands like [SMC](https://sg.rs-online.com/web/b/smc/), [Burkert](https://sg.rs-online.com/web/b/burkert/), [RS PRO](https://sg.rs-online.com/web/content/m/rs-pro-learn-more), and more. We offer a selection of high-quality solenoid valves at competitive prices, ensuring you find the perfect solution for your fluid control needs, whether for industrial automation, pneumatic systems, or water management applications.

We also carry an extensive range of related products, such as [pneumatic fittings](https://sg.rs-online.com/web/c/pneumatics-hydraulics/pneumatic-connectors-fittings-hose/pneumatic-fittings/) and tubing, as well as other essential automation components like sensors and actuators, to provide comprehensive solutions for your industrial needs.

Order your 2-way solenoid valves, 3-way solenoid valves, brass solenoid valves, stainless steel solenoid valves, and other accessories online and enjoy next-day delivery. For more details on our ordering process, delivery services, and delivery fees, please refer to our [Ordering Page](https://sg.rs-online.com/web/content/support/all-articles/ordering) and [Delivery Page](https://sg.rs-online.com/web/content/support/all-articles/delivery).



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