Provided Pressure Relief 3 Port Valves have been developed as per occupational safety and health administration department of labor (OSHA) norms. These non-automatically controlled valves are used to avoid hazardous situations caused by pressure in pneumatic lines. The pressure is generated due to deposition of residues. These aluminum made flame proof valves comprise of standard accessories like bonnet and handle. Padlock securing facility of these Pressure Relief 3 Port Valves helps to avert possibility of accidents during cleaning or servicing of pipelines.