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SRR Series Reducing Ring Spacers
Standard Class 150 (150 lb.) Reducing Ring Spacers
Base Part Number: As shown here, the BASE PART NUMBER defines the Series (three characters), the material (one character), the nominal size, the reduced center hole pipe size RR and the thickness TH. Use a decimal number to indicate the nominal size. Replace RR in the part number with the reduction pipe size in decimals. Then, for thicknesses up to 6”, replace the TH with the decimal thickness. For thickness over 6”, contact factory. Note that the Class (or lb.) designation does not imply a pressure rating. For example, a 3/4” x 1/2” Class 150 PTFE Reducing Ring Spacer x 1” thick would be SRRT-0.75-0.5-1
NPT Threading: For NPT threaded spacers, add to the Base Part Number the suffix NPT.
For example, a 2” x 3/4” Class 150 PTFE threaded Reducing Ring Spacer x 1-1/2” thickwould be SRRT-2-0.75-1.5-NPT
Click here to view the minimum thicknesses required for NPT threads.
Class 300 (300 lb.) Spacers: For Class 300 spacers, add to the Base Part Number the suffix300. For other classes, contact the factory. For example, a 2” x 1” Class 300 PTFE threaded Reducing Ring Spacer x 1-1/2” thick would be SRRT-2-1-1.5-NPT-300
Click here to view the Sizes of Class 150 and 300 Spacers and Flanges.
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