Edit post

Edit your reply below.

Post Body
Enter your post below.
It is an electropneumatic valve. Open or shut, you still control the duration. I have seen some units that have a pedal on the floor that will sound the long, long, short, long when depressed. These units still have the button. It is nothing new. Some of our SD40s have the "button." <br />Ken
Tags (Optional)
Tags are keywords that get attached to your post. They are used to categorize your submission and make it easier to search for. To add tags to your post type a tag into the box below and click the "Add Tag" button.
Add Tag