What type of control valve is required to operate a double acting ...

[bucstennis@aim.com]

What type of control valve is required to operate a double acting cylinder?
 
  What will be an ideal response?

Question 2

When should metal bowls be used on filters and lubricators?
 
  What will be an ideal response?

[tennis14576]

Answer to Question 1

Four-way valves.

Answer to Question 2

Metal bowls are used where filters are exposed to higher pressures and temperatures. Metal bowls will also withstand rough usage and are less susceptible to physical damage.

[bucstennis@aim.com]

Thanks for the timely response, appreciate it

[daiying98]

Excellent