OPTIPOW 105/135, the compact piston pulse valves for fabric filters of different types feature as below: 1. is a result of many years of experience within the fabric filter technology area; 2. is quick acting with high efficiency; 3. has small dimensions, the figure after the name stands for the diameter of the plunge; 4. is primarily designed to be used in combination with circular pressure tank; 5. is easy to install and make serice maintenance; 6. has a very robust design, designed for normal use at air pressure up to 600kpa(6bar); 7. normal max operating temperature(complete valve) 50 degree C; 8. Germany Continental membrane to be use for 2 years of service life guarantee.