Pneumatic Control Valve Globe Pipe (In.) 1/2 NPT Valve Body Material Bronze Valve Type 2-Way NO Cv 2.5 Spring Range (PSI) 3-8 Close Off Rating @ Main PSI 45 @ 20 Differential Pressure (PSI) 25 psi Max Pressure (PSI) 15 psi Features Direct Coupled Allows Easy Installation Hole Type Plug Provides Quieter Operation Function Used to Provide Pneumatic Proportional Control of Water Steam and Ethylene Glycol Solutions (Up to 50 Percent)