Normally Closed valve | NC valve

What is a normally closed valve. Why is the valvestate normally closed and what types of valves. Below is a share from sales engineer specializing in valves

1. What is normally closed valve

Normally closed solenoid valve is one of the common solenoid valves. The characteristic is that it is always in the closed state when there is no power supply and has the NC symbol on the name plate

2. When to use normally closed solenoid valve

Valves are installed at locations with these characteristics

• Continuous flow stops at the valve installation location
• Short opening time (less than 2 hours) and low opening frequency

3. Normally closed valve type

Rarely opened valves can generally include many types such as: Gate valves, globe valves, butterfly valves, ball valves, etc. However, the normally closed valve mentioned here is the Normally closed Solenoid Valve

4. Normally closed valve voltage

In fact, valves can use many different voltage sources. However, these following 3 voltage types are common.

• 24VDC NC solenoid valve 
• 220VDC NC solenoid valve 
• 12VDC NC solenoid valve

5. NC valve material

Valve manufacturing materials are very diverse, the most common are the 4 types of materials below:

• Brass: Drink water, steam
• Stainless steel: For water with chemicals, hot steam
• Plastic: Water at low temperature
• Cast iron: Water supply for irrigation systems

6. NC valve application

Valves are used in many systems

• Plumbing systems
• Steam pipes
• Gas pipes
• Oil pipes