Download PDF instructions on how to choose the correct OSHA compressed air safety shut-off valves you need by clicking here. Adhere to OSHA regulations for compressors with our 1" 310-340 CFM flow check valve. Without one, not only are you in violation of these regulations, you are also compromising the safety of your employees. When an air hose breaks, dangerous hose whips can potentially cause serious injuries. By using our compressor safety valve, you can maintain a safe working environment and reduce liability issues.