Inquiry (采购产品): pressure relief valves Hello, I need a pressure relief valve per the following specification. The valve is fairly standard with the exception of the vacuum specification. We have used the A-G product with good service. Lately, Tyco has refused to certify the valve on the vacuum condition. Have you ever sold a valve to operate under a full vacuum? VFS can perform a leak test on a valve if you are interested. Regards, Tom Piaia, PE Mechanical Engineer Vacuum Furnace Systems, Inc. Souderton, PA (215) 723-8415 x 126 Service: Relief Valve for ASME code vessel. Argon or nitrogen gas in vessel. Our standard relief valve for ASME code vessels has been an Anderson Greenwood Type 263. The description is: VALVE,SAFETY ANDERSON-GREENWOOD MODEL #26305-34/S1-W WITH BACK FLOW PREVENTER, 3" INLET 150# RFSF 4" OUTLET 150# RF. SET PRESSURE UNIT MUST MEET ASME SECTION VIII. NITROGEN OR ARGON SERVICE. MUST SEAL AT A VACUUM OF 10 -6 TORR We use valves at three pressure ratings. 85 PSIG, 150 PSIG, and 180 PSIG We may purchase three or four per year spread across the pressure range. **** Hidden Message ***** Tom Piaia 1946 East Cherry Lane Souderton, PA 18964 USA Company: Vacuum Furnace Systems Corp. Title: Mechanical Engineer Phone: (215) 723-8415 x126 E-mail: tpiaia@vfscorp.com **** Hidden Message ***** tpiaia@vfscorp.com
