Do you know that Bang Bang is the term used to describe directional control valve?

Do you know that the term “Bang-bang” is often used to describe basic directional-control valves?

It refers to how the valves shift—from completely open to completely close. This usually occurs in an instant that causes fluid to rapidly speedup and slow down. Under certain conditions, this can cause fluid hammer, which is more like a hammer striking the hydraulic system from inside. Hence, shifting the valve from one position to another can produce a bang-bang sound.

Directional Control Valves can be categorized according to:

  • number of positions
  • type of spool
  • number of ports
  • actuating methods

The digital valve is more basic than the directional-control valve. It operates either on or off. However discrete valves uses a spool to attain 2, 3 or more positions. The benefit to this type of operation is that it offers a positive seal to avoid cross-port leakage.

The most simple of all directional-control valves is the check valve, a specific type of digital valve. Basic check valves permit fluid to flow in one direction, but avoid fluid from flowing in the opposite direction. As with all fluid power components, directional-control valves can be represented by standard symbols published in ISO 1219.

Do you require pneumatic products for your production line or factory?

EC Pneumatic & Hardware has over 16+ years’ experience in the industry, enabling us to source the right mechanisms for your pneumatic requirements. All of our pneumatic components and products are of first-class quality & performance, which makes it easy to fit in your desired workflow. We also carry a collection of leading brands and manufacturers in the industry such as SWISH, CKD, Parker, SMC, ASCO, JISAN and heaps more. Check out our offerings of pneumatic products.

If you’re interested in working with EC Pneumatic & Hardware, contact us today.

To place an order or request for a quote, do contact us & our team of experts will get back to you with their professional advice.

Additional Information

Need to request for a custom quotation?

Get in touch and our team will get back to you as soon as possible with a solution.


No. 2749, Ground Floor, Jalan Chain Ferry, Taman Inderawasih, 13600, Perai, Pulau Pinang, Malaysia.

Contact Details


Tel: +604-380 1277
Tel: +604-380 1278
Fax: +604-380 1279

Subscribe to our Newsletter & stay updated with all the latest product updates and industry news.

Subscribe to our Newsletter & stay updated with all the latest product updates and industry news.

Don't worry, we won't spam you.

Thanks for signing up! You are part of our Newsletter Subscribers.

Share This