Airpinch valves from Richway Industries (Janesville, IA) use compressed air, or fluid, to compress the rubber sleeve inside of the valve body to shut off media flow. Operating pressures for controlled material vary depending on sleeve elastomer and valve size. They can range from a moderate vacuum (up to 26" Hg) to a maximum of 90 psi when controlling with air.
Required actuation pressure is generally 20 to 40 psi greater than media pressure. It’s recommended that the actuation air pressure be set just high enough to get complete valve closure. Using higher actuation pressure than is required to get complete media shut off can reduce sleeve life. Use of actuation pressure above 90 psi is not recommended.
For more information, including a recommended configuration, click here.